swapfs.c revision 2432a41a58c03be4afdfb12f40e7b7cfe3255145
150e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o/* 250e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o * swapfs.c --- swap ext2 filesystem data structures 3efc6f628e15de95bcd13e4f0ee223cb42115d520Theodore Ts'o * 48132d840c8f6b0d90ab5048d6f8529f74e1aa0b3Theodore Ts'o * Copyright (C) 1995, 1996, 2002 Theodore Ts'o. 519c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o * 619c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o * %Begin-Header% 7543547a52a20cb7e69d74921b2f691078fd55d83Theodore Ts'o * This file may be redistributed under the terms of the GNU Library 8543547a52a20cb7e69d74921b2f691078fd55d83Theodore Ts'o * General Public License, version 2. 919c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o * %End-Header% 1050e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o */ 1150e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o 12d1154eb460efe588eaed3d439c1caaca149fa362Theodore Ts'o#include "config.h" 1350e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o#include <stdio.h> 144cbe8af4b0d0c72fb28bb500c1bd8a46b00fdde3Theodore Ts'o#if HAVE_UNISTD_H 1550e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o#include <unistd.h> 164cbe8af4b0d0c72fb28bb500c1bd8a46b00fdde3Theodore Ts'o#endif 177331196a16e57ef80dd6ae40eeeab14747ce2f5dTheodore Ts'o#include <string.h> 1850e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o#include <time.h> 1950e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o 20b5abe6fac9c9e7caf4710501d1657d30e4857ef6Theodore Ts'o#include "ext2_fs.h" 2150e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o#include "ext2fs.h" 227331196a16e57ef80dd6ae40eeeab14747ce2f5dTheodore Ts'o#include <ext2fs/ext2_ext_attr.h> 2350e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o 24a5dda0542283d0674f42a0d1b04d33888f512eabTheodore Ts'o#ifdef WORDS_BIGENDIAN 25e5b38a5fafe4807b54d90a2e70bddf4b41b1695bTheodore Ts'ovoid ext2fs_swap_super(struct ext2_super_block * sb) 2650e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o{ 278132d840c8f6b0d90ab5048d6f8529f74e1aa0b3Theodore Ts'o int i; 28e5b38a5fafe4807b54d90a2e70bddf4b41b1695bTheodore Ts'o sb->s_inodes_count = ext2fs_swab32(sb->s_inodes_count); 29e5b38a5fafe4807b54d90a2e70bddf4b41b1695bTheodore Ts'o sb->s_blocks_count = ext2fs_swab32(sb->s_blocks_count); 30e5b38a5fafe4807b54d90a2e70bddf4b41b1695bTheodore Ts'o sb->s_r_blocks_count = ext2fs_swab32(sb->s_r_blocks_count); 31e5b38a5fafe4807b54d90a2e70bddf4b41b1695bTheodore Ts'o sb->s_free_blocks_count = ext2fs_swab32(sb->s_free_blocks_count); 32e5b38a5fafe4807b54d90a2e70bddf4b41b1695bTheodore Ts'o sb->s_free_inodes_count = ext2fs_swab32(sb->s_free_inodes_count); 33e5b38a5fafe4807b54d90a2e70bddf4b41b1695bTheodore Ts'o sb->s_first_data_block = ext2fs_swab32(sb->s_first_data_block); 34e5b38a5fafe4807b54d90a2e70bddf4b41b1695bTheodore Ts'o sb->s_log_block_size = ext2fs_swab32(sb->s_log_block_size); 35412376efff3c0e0c2fea00666c2457e6f2ae1878Theodore Ts'o sb->s_log_cluster_size = ext2fs_swab32(sb->s_log_cluster_size); 36e5b38a5fafe4807b54d90a2e70bddf4b41b1695bTheodore Ts'o sb->s_blocks_per_group = ext2fs_swab32(sb->s_blocks_per_group); 37412376efff3c0e0c2fea00666c2457e6f2ae1878Theodore Ts'o sb->s_clusters_per_group = ext2fs_swab32(sb->s_clusters_per_group); 38e5b38a5fafe4807b54d90a2e70bddf4b41b1695bTheodore Ts'o sb->s_inodes_per_group = ext2fs_swab32(sb->s_inodes_per_group); 39e5b38a5fafe4807b54d90a2e70bddf4b41b1695bTheodore Ts'o sb->s_mtime = ext2fs_swab32(sb->s_mtime); 40e5b38a5fafe4807b54d90a2e70bddf4b41b1695bTheodore Ts'o sb->s_wtime = ext2fs_swab32(sb->s_wtime); 41e5b38a5fafe4807b54d90a2e70bddf4b41b1695bTheodore Ts'o sb->s_mnt_count = ext2fs_swab16(sb->s_mnt_count); 42e5b38a5fafe4807b54d90a2e70bddf4b41b1695bTheodore Ts'o sb->s_max_mnt_count = ext2fs_swab16(sb->s_max_mnt_count); 43e5b38a5fafe4807b54d90a2e70bddf4b41b1695bTheodore Ts'o sb->s_magic = ext2fs_swab16(sb->s_magic); 44e5b38a5fafe4807b54d90a2e70bddf4b41b1695bTheodore Ts'o sb->s_state = ext2fs_swab16(sb->s_state); 45e5b38a5fafe4807b54d90a2e70bddf4b41b1695bTheodore Ts'o sb->s_errors = ext2fs_swab16(sb->s_errors); 46e5b38a5fafe4807b54d90a2e70bddf4b41b1695bTheodore Ts'o sb->s_minor_rev_level = ext2fs_swab16(sb->s_minor_rev_level); 47e5b38a5fafe4807b54d90a2e70bddf4b41b1695bTheodore Ts'o sb->s_lastcheck = ext2fs_swab32(sb->s_lastcheck); 48e5b38a5fafe4807b54d90a2e70bddf4b41b1695bTheodore Ts'o sb->s_checkinterval = ext2fs_swab32(sb->s_checkinterval); 49e5b38a5fafe4807b54d90a2e70bddf4b41b1695bTheodore Ts'o sb->s_creator_os = ext2fs_swab32(sb->s_creator_os); 50e5b38a5fafe4807b54d90a2e70bddf4b41b1695bTheodore Ts'o sb->s_rev_level = ext2fs_swab32(sb->s_rev_level); 51e5b38a5fafe4807b54d90a2e70bddf4b41b1695bTheodore Ts'o sb->s_def_resuid = ext2fs_swab16(sb->s_def_resuid); 52e5b38a5fafe4807b54d90a2e70bddf4b41b1695bTheodore Ts'o sb->s_def_resgid = ext2fs_swab16(sb->s_def_resgid); 53e5b38a5fafe4807b54d90a2e70bddf4b41b1695bTheodore Ts'o sb->s_first_ino = ext2fs_swab32(sb->s_first_ino); 54e5b38a5fafe4807b54d90a2e70bddf4b41b1695bTheodore Ts'o sb->s_inode_size = ext2fs_swab16(sb->s_inode_size); 55e5b38a5fafe4807b54d90a2e70bddf4b41b1695bTheodore Ts'o sb->s_block_group_nr = ext2fs_swab16(sb->s_block_group_nr); 56e5b38a5fafe4807b54d90a2e70bddf4b41b1695bTheodore Ts'o sb->s_feature_compat = ext2fs_swab32(sb->s_feature_compat); 57e5b38a5fafe4807b54d90a2e70bddf4b41b1695bTheodore Ts'o sb->s_feature_incompat = ext2fs_swab32(sb->s_feature_incompat); 58e5b38a5fafe4807b54d90a2e70bddf4b41b1695bTheodore Ts'o sb->s_feature_ro_compat = ext2fs_swab32(sb->s_feature_ro_compat); 59e5b38a5fafe4807b54d90a2e70bddf4b41b1695bTheodore Ts'o sb->s_algorithm_usage_bitmap = ext2fs_swab32(sb->s_algorithm_usage_bitmap); 605d28e3be679b515fb4a2e9ce1716f2452381b308Theodore Ts'o sb->s_reserved_gdt_blocks = ext2fs_swab16(sb->s_reserved_gdt_blocks); 61e5b38a5fafe4807b54d90a2e70bddf4b41b1695bTheodore Ts'o sb->s_journal_inum = ext2fs_swab32(sb->s_journal_inum); 62e5b38a5fafe4807b54d90a2e70bddf4b41b1695bTheodore Ts'o sb->s_journal_dev = ext2fs_swab32(sb->s_journal_dev); 63e5b38a5fafe4807b54d90a2e70bddf4b41b1695bTheodore Ts'o sb->s_last_orphan = ext2fs_swab32(sb->s_last_orphan); 648061d2c144bf22ce3e170e40a194932da4baf8fbTheodore Ts'o sb->s_desc_size = ext2fs_swab16(sb->s_desc_size); 651ba7a2f2b6a9b152828a06443955a7fb1d139930Theodore Ts'o sb->s_default_mount_opts = ext2fs_swab32(sb->s_default_mount_opts); 66c046ac7f2e4c53e20cf1e909bbe511f91074b396Theodore Ts'o sb->s_first_meta_bg = ext2fs_swab32(sb->s_first_meta_bg); 671ba7a2f2b6a9b152828a06443955a7fb1d139930Theodore Ts'o sb->s_mkfs_time = ext2fs_swab32(sb->s_mkfs_time); 686b3ce9871c3424d0b41e0c7227ddc116d2e0de1aTheodore Ts'o sb->s_blocks_count_hi = ext2fs_swab32(sb->s_blocks_count_hi); 696b3ce9871c3424d0b41e0c7227ddc116d2e0de1aTheodore Ts'o sb->s_r_blocks_count_hi = ext2fs_swab32(sb->s_r_blocks_count_hi); 706b3ce9871c3424d0b41e0c7227ddc116d2e0de1aTheodore Ts'o sb->s_free_blocks_hi = ext2fs_swab32(sb->s_free_blocks_hi); 716b3ce9871c3424d0b41e0c7227ddc116d2e0de1aTheodore Ts'o sb->s_min_extra_isize = ext2fs_swab16(sb->s_min_extra_isize); 726b3ce9871c3424d0b41e0c7227ddc116d2e0de1aTheodore Ts'o sb->s_want_extra_isize = ext2fs_swab16(sb->s_want_extra_isize); 73f77704e416fca7dbe4cc91abba674d2ae3c14f6fTheodore Ts'o sb->s_flags = ext2fs_swab32(sb->s_flags); 740f5eba7501f467f757792ee449d16c9259b994fdAndreas Dilger sb->s_mmp_update_interval = ext2fs_swab16(sb->s_mmp_update_interval); 750f5eba7501f467f757792ee449d16c9259b994fdAndreas Dilger sb->s_mmp_block = ext2fs_swab64(sb->s_mmp_block); 76b7c5b4030870b31d73019d9d9ec55d550772590bTheodore Ts'o sb->s_kbytes_written = ext2fs_swab64(sb->s_kbytes_written); 77f5448c19acda0bae0673d17e97b8a0590c99c944Theodore Ts'o sb->s_snapshot_inum = ext2fs_swab32(sb->s_snapshot_inum); 78ccc7cf032852dd5c84b227bafb481b1d158e2b5eTheodore Ts'o sb->s_snapshot_id = ext2fs_swab32(sb->s_snapshot_id); 79f5448c19acda0bae0673d17e97b8a0590c99c944Theodore Ts'o sb->s_snapshot_r_blocks_count = 80f5448c19acda0bae0673d17e97b8a0590c99c944Theodore Ts'o ext2fs_swab64(sb->s_snapshot_r_blocks_count); 81f5448c19acda0bae0673d17e97b8a0590c99c944Theodore Ts'o sb->s_snapshot_list = ext2fs_swab32(sb->s_snapshot_list); 820edcc2702106ef8ea0d4ab60ef06c0c38b0b87eeAditya Kali sb->s_usr_quota_inum = ext2fs_swab32(sb->s_usr_quota_inum); 830edcc2702106ef8ea0d4ab60ef06c0c38b0b87eeAditya Kali sb->s_grp_quota_inum = ext2fs_swab32(sb->s_grp_quota_inum); 8489efc88e65136ece22708cc28ec4124a33feeecdTheodore Ts'o sb->s_overhead_blocks = ext2fs_swab32(sb->s_overhead_blocks); 8589efc88e65136ece22708cc28ec4124a33feeecdTheodore Ts'o sb->s_checksum = ext2fs_swab32(sb->s_checksum); 86f5448c19acda0bae0673d17e97b8a0590c99c944Theodore Ts'o 878132d840c8f6b0d90ab5048d6f8529f74e1aa0b3Theodore Ts'o for (i=0; i < 4; i++) 888132d840c8f6b0d90ab5048d6f8529f74e1aa0b3Theodore Ts'o sb->s_hash_seed[i] = ext2fs_swab32(sb->s_hash_seed[i]); 896eb229dc5d212ac5897ff626b839318f4e0c57caEric Sandeen 906eb229dc5d212ac5897ff626b839318f4e0c57caEric Sandeen /* if journal backup is for a valid extent-based journal... */ 91931b58e1cb2158c1f5218059cce92e94917ef485Andreas Dilger if (ext2fs_extent_header_verify(sb->s_jnl_blocks, 92931b58e1cb2158c1f5218059cce92e94917ef485Andreas Dilger sizeof(sb->s_jnl_blocks)) == 0) { 93931b58e1cb2158c1f5218059cce92e94917ef485Andreas Dilger /* ... swap only the journal i_size and i_size_high, 94931b58e1cb2158c1f5218059cce92e94917ef485Andreas Dilger * and the extent data is not swapped on read */ 95931b58e1cb2158c1f5218059cce92e94917ef485Andreas Dilger i = 15; 96931b58e1cb2158c1f5218059cce92e94917ef485Andreas Dilger } else { 97931b58e1cb2158c1f5218059cce92e94917ef485Andreas Dilger /* direct/indirect journal: swap it all */ 98931b58e1cb2158c1f5218059cce92e94917ef485Andreas Dilger i = 0; 996eb229dc5d212ac5897ff626b839318f4e0c57caEric Sandeen } 100931b58e1cb2158c1f5218059cce92e94917ef485Andreas Dilger for (; i < 17; i++) 1011ba7a2f2b6a9b152828a06443955a7fb1d139930Theodore Ts'o sb->s_jnl_blocks[i] = ext2fs_swab32(sb->s_jnl_blocks[i]); 10265c6c3e06f72e76ddb69222b3be1713d870eb782Theodore Ts'o sb->s_backup_bgs[0] = ext2fs_swab32(sb->s_backup_bgs[0]); 10365c6c3e06f72e76ddb69222b3be1713d870eb782Theodore Ts'o sb->s_backup_bgs[1] = ext2fs_swab32(sb->s_backup_bgs[1]); 10450e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o} 10550e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o 106cf828f1a72ec1eb0c1e819307137879447c909b7Theodore Ts'ovoid ext2fs_swap_group_desc2(ext2_filsys fs, struct ext2_group_desc *gdp) 10750e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o{ 1082bc30417541deffca795db8ec4e7f7ccb616dc3fAndreas Dilger struct ext4_group_desc *gdp4 = (struct ext4_group_desc *)gdp; 1092bc30417541deffca795db8ec4e7f7ccb616dc3fAndreas Dilger 110cf828f1a72ec1eb0c1e819307137879447c909b7Theodore Ts'o /* Do the 32-bit parts first */ 11150e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o gdp->bg_block_bitmap = ext2fs_swab32(gdp->bg_block_bitmap); 11250e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o gdp->bg_inode_bitmap = ext2fs_swab32(gdp->bg_inode_bitmap); 11350e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o gdp->bg_inode_table = ext2fs_swab32(gdp->bg_inode_table); 11450e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o gdp->bg_free_blocks_count = ext2fs_swab16(gdp->bg_free_blocks_count); 11550e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o gdp->bg_free_inodes_count = ext2fs_swab16(gdp->bg_free_inodes_count); 11650e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o gdp->bg_used_dirs_count = ext2fs_swab16(gdp->bg_used_dirs_count); 117f5fa20078bfc05b554294fe9c5505375d7913e8cTheodore Ts'o gdp->bg_flags = ext2fs_swab16(gdp->bg_flags); 11889efc88e65136ece22708cc28ec4124a33feeecdTheodore Ts'o gdp->bg_exclude_bitmap_lo = ext2fs_swab32(gdp->bg_exclude_bitmap_lo); 11989efc88e65136ece22708cc28ec4124a33feeecdTheodore Ts'o gdp->bg_block_bitmap_csum_lo = 12089efc88e65136ece22708cc28ec4124a33feeecdTheodore Ts'o ext2fs_swab16(gdp->bg_block_bitmap_csum_lo); 12189efc88e65136ece22708cc28ec4124a33feeecdTheodore Ts'o gdp->bg_inode_bitmap_csum_lo = 12289efc88e65136ece22708cc28ec4124a33feeecdTheodore Ts'o ext2fs_swab16(gdp->bg_inode_bitmap_csum_lo); 1238815fb8a00f5a441eb62f035353db9e0cca90b38Theodore Ts'o gdp->bg_itable_unused = ext2fs_swab16(gdp->bg_itable_unused); 1248815fb8a00f5a441eb62f035353db9e0cca90b38Theodore Ts'o gdp->bg_checksum = ext2fs_swab16(gdp->bg_checksum); 125cf828f1a72ec1eb0c1e819307137879447c909b7Theodore Ts'o /* If we're 32-bit, we're done */ 1262bc30417541deffca795db8ec4e7f7ccb616dc3fAndreas Dilger if (fs == NULL || EXT2_DESC_SIZE(fs->super) < EXT2_MIN_DESC_SIZE_64BIT) 127cf828f1a72ec1eb0c1e819307137879447c909b7Theodore Ts'o return; 128cf828f1a72ec1eb0c1e819307137879447c909b7Theodore Ts'o 129cf828f1a72ec1eb0c1e819307137879447c909b7Theodore Ts'o /* Swap the 64-bit parts */ 130cf828f1a72ec1eb0c1e819307137879447c909b7Theodore Ts'o gdp4->bg_block_bitmap_hi = ext2fs_swab32(gdp4->bg_block_bitmap_hi); 131cf828f1a72ec1eb0c1e819307137879447c909b7Theodore Ts'o gdp4->bg_inode_bitmap_hi = ext2fs_swab32(gdp4->bg_inode_bitmap_hi); 132cf828f1a72ec1eb0c1e819307137879447c909b7Theodore Ts'o gdp4->bg_inode_table_hi = ext2fs_swab32(gdp4->bg_inode_table_hi); 133cf828f1a72ec1eb0c1e819307137879447c909b7Theodore Ts'o gdp4->bg_free_blocks_count_hi = 134cf828f1a72ec1eb0c1e819307137879447c909b7Theodore Ts'o ext2fs_swab16(gdp4->bg_free_blocks_count_hi); 135cf828f1a72ec1eb0c1e819307137879447c909b7Theodore Ts'o gdp4->bg_free_inodes_count_hi = 136cf828f1a72ec1eb0c1e819307137879447c909b7Theodore Ts'o ext2fs_swab16(gdp4->bg_free_inodes_count_hi); 137cf828f1a72ec1eb0c1e819307137879447c909b7Theodore Ts'o gdp4->bg_used_dirs_count_hi = 138cf828f1a72ec1eb0c1e819307137879447c909b7Theodore Ts'o ext2fs_swab16(gdp4->bg_used_dirs_count_hi); 139cf828f1a72ec1eb0c1e819307137879447c909b7Theodore Ts'o gdp4->bg_itable_unused_hi = ext2fs_swab16(gdp4->bg_itable_unused_hi); 140ae96c678e15eda2a5d0eea7e1067b449f6604affTheodore Ts'o gdp4->bg_exclude_bitmap_hi = ext2fs_swab16(gdp4->bg_exclude_bitmap_hi); 141ae96c678e15eda2a5d0eea7e1067b449f6604affTheodore Ts'o gdp4->bg_block_bitmap_csum_hi = 142ae96c678e15eda2a5d0eea7e1067b449f6604affTheodore Ts'o ext2fs_swab16(gdp4->bg_block_bitmap_csum_hi); 143ae96c678e15eda2a5d0eea7e1067b449f6604affTheodore Ts'o gdp4->bg_inode_bitmap_csum_hi = 144ae96c678e15eda2a5d0eea7e1067b449f6604affTheodore Ts'o ext2fs_swab16(gdp4->bg_inode_bitmap_csum_hi); 14550e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o} 14650e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o 147cf828f1a72ec1eb0c1e819307137879447c909b7Theodore Ts'ovoid ext2fs_swap_group_desc(struct ext2_group_desc *gdp) 148cf828f1a72ec1eb0c1e819307137879447c909b7Theodore Ts'o{ 149ae96c678e15eda2a5d0eea7e1067b449f6604affTheodore Ts'o ext2fs_swap_group_desc2(0, gdp); 150cf828f1a72ec1eb0c1e819307137879447c909b7Theodore Ts'o} 151cf828f1a72ec1eb0c1e819307137879447c909b7Theodore Ts'o 152cf828f1a72ec1eb0c1e819307137879447c909b7Theodore Ts'o 153fefaef39e046781ddc75d15a8f12369f17dbd17dAndreas Dilgervoid ext2fs_swap_ext_attr_header(struct ext2_ext_attr_header *to_header, 154fefaef39e046781ddc75d15a8f12369f17dbd17dAndreas Dilger struct ext2_ext_attr_header *from_header) 155fefaef39e046781ddc75d15a8f12369f17dbd17dAndreas Dilger{ 156fefaef39e046781ddc75d15a8f12369f17dbd17dAndreas Dilger int n; 157fefaef39e046781ddc75d15a8f12369f17dbd17dAndreas Dilger 158fefaef39e046781ddc75d15a8f12369f17dbd17dAndreas Dilger to_header->h_magic = ext2fs_swab32(from_header->h_magic); 159fefaef39e046781ddc75d15a8f12369f17dbd17dAndreas Dilger to_header->h_blocks = ext2fs_swab32(from_header->h_blocks); 160fefaef39e046781ddc75d15a8f12369f17dbd17dAndreas Dilger to_header->h_refcount = ext2fs_swab32(from_header->h_refcount); 161fefaef39e046781ddc75d15a8f12369f17dbd17dAndreas Dilger to_header->h_hash = ext2fs_swab32(from_header->h_hash); 16239f5659ae3a0d9105ecddddfda2800b7002febc3Darrick J. Wong to_header->h_checksum = ext2fs_swab32(from_header->h_checksum); 16339f5659ae3a0d9105ecddddfda2800b7002febc3Darrick J. Wong for (n = 0; n < 3; n++) 164fefaef39e046781ddc75d15a8f12369f17dbd17dAndreas Dilger to_header->h_reserved[n] = 165fefaef39e046781ddc75d15a8f12369f17dbd17dAndreas Dilger ext2fs_swab32(from_header->h_reserved[n]); 166fefaef39e046781ddc75d15a8f12369f17dbd17dAndreas Dilger} 167fefaef39e046781ddc75d15a8f12369f17dbd17dAndreas Dilger 168fefaef39e046781ddc75d15a8f12369f17dbd17dAndreas Dilgervoid ext2fs_swap_ext_attr_entry(struct ext2_ext_attr_entry *to_entry, 169fefaef39e046781ddc75d15a8f12369f17dbd17dAndreas Dilger struct ext2_ext_attr_entry *from_entry) 170fefaef39e046781ddc75d15a8f12369f17dbd17dAndreas Dilger{ 171fefaef39e046781ddc75d15a8f12369f17dbd17dAndreas Dilger to_entry->e_value_offs = ext2fs_swab16(from_entry->e_value_offs); 172fefaef39e046781ddc75d15a8f12369f17dbd17dAndreas Dilger to_entry->e_value_block = ext2fs_swab32(from_entry->e_value_block); 173fefaef39e046781ddc75d15a8f12369f17dbd17dAndreas Dilger to_entry->e_value_size = ext2fs_swab32(from_entry->e_value_size); 174fefaef39e046781ddc75d15a8f12369f17dbd17dAndreas Dilger to_entry->e_hash = ext2fs_swab32(from_entry->e_hash); 175fefaef39e046781ddc75d15a8f12369f17dbd17dAndreas Dilger} 176fefaef39e046781ddc75d15a8f12369f17dbd17dAndreas Dilger 1777331196a16e57ef80dd6ae40eeeab14747ce2f5dTheodore Ts'ovoid ext2fs_swap_ext_attr(char *to, char *from, int bufsize, int has_header) 1787331196a16e57ef80dd6ae40eeeab14747ce2f5dTheodore Ts'o{ 1797331196a16e57ef80dd6ae40eeeab14747ce2f5dTheodore Ts'o struct ext2_ext_attr_header *from_header = 1807331196a16e57ef80dd6ae40eeeab14747ce2f5dTheodore Ts'o (struct ext2_ext_attr_header *)from; 1817331196a16e57ef80dd6ae40eeeab14747ce2f5dTheodore Ts'o struct ext2_ext_attr_header *to_header = 1827331196a16e57ef80dd6ae40eeeab14747ce2f5dTheodore Ts'o (struct ext2_ext_attr_header *)to; 1837331196a16e57ef80dd6ae40eeeab14747ce2f5dTheodore Ts'o struct ext2_ext_attr_entry *from_entry, *to_entry; 1847331196a16e57ef80dd6ae40eeeab14747ce2f5dTheodore Ts'o char *from_end = (char *)from_header + bufsize; 1857331196a16e57ef80dd6ae40eeeab14747ce2f5dTheodore Ts'o 1867331196a16e57ef80dd6ae40eeeab14747ce2f5dTheodore Ts'o if (to_header != from_header) 1877331196a16e57ef80dd6ae40eeeab14747ce2f5dTheodore Ts'o memcpy(to_header, from_header, bufsize); 1887331196a16e57ef80dd6ae40eeeab14747ce2f5dTheodore Ts'o 1897331196a16e57ef80dd6ae40eeeab14747ce2f5dTheodore Ts'o if (has_header) { 190fefaef39e046781ddc75d15a8f12369f17dbd17dAndreas Dilger ext2fs_swap_ext_attr_header(to_header, from_header); 191fefaef39e046781ddc75d15a8f12369f17dbd17dAndreas Dilger 1927331196a16e57ef80dd6ae40eeeab14747ce2f5dTheodore Ts'o from_entry = (struct ext2_ext_attr_entry *)(from_header+1); 1937331196a16e57ef80dd6ae40eeeab14747ce2f5dTheodore Ts'o to_entry = (struct ext2_ext_attr_entry *)(to_header+1); 194fefaef39e046781ddc75d15a8f12369f17dbd17dAndreas Dilger } else { 195fefaef39e046781ddc75d15a8f12369f17dbd17dAndreas Dilger from_entry = (struct ext2_ext_attr_entry *)from_header; 196fefaef39e046781ddc75d15a8f12369f17dbd17dAndreas Dilger to_entry = (struct ext2_ext_attr_entry *)to_header; 1977331196a16e57ef80dd6ae40eeeab14747ce2f5dTheodore Ts'o } 1987331196a16e57ef80dd6ae40eeeab14747ce2f5dTheodore Ts'o 19988334ce084ef45929d7aacff5af283994358c5d6Darrick J. Wong while ((char *)from_entry < from_end && 20088334ce084ef45929d7aacff5af283994358c5d6Darrick J. Wong (char *)EXT2_EXT_ATTR_NEXT(from_entry) <= from_end && 20188334ce084ef45929d7aacff5af283994358c5d6Darrick J. Wong *(__u32 *)from_entry) { 202fefaef39e046781ddc75d15a8f12369f17dbd17dAndreas Dilger ext2fs_swap_ext_attr_entry(to_entry, from_entry); 2037331196a16e57ef80dd6ae40eeeab14747ce2f5dTheodore Ts'o from_entry = EXT2_EXT_ATTR_NEXT(from_entry); 2047331196a16e57ef80dd6ae40eeeab14747ce2f5dTheodore Ts'o to_entry = EXT2_EXT_ATTR_NEXT(to_entry); 2057331196a16e57ef80dd6ae40eeeab14747ce2f5dTheodore Ts'o } 2067331196a16e57ef80dd6ae40eeeab14747ce2f5dTheodore Ts'o} 2077331196a16e57ef80dd6ae40eeeab14747ce2f5dTheodore Ts'o 2087331196a16e57ef80dd6ae40eeeab14747ce2f5dTheodore Ts'ovoid ext2fs_swap_inode_full(ext2_filsys fs, struct ext2_inode_large *t, 2097331196a16e57ef80dd6ae40eeeab14747ce2f5dTheodore Ts'o struct ext2_inode_large *f, int hostorder, 2107331196a16e57ef80dd6ae40eeeab14747ce2f5dTheodore Ts'o int bufsize) 2111e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o{ 21282e541885ea912bc6764b97e2545f851cf7e3ff3Eric Sandeen unsigned i, has_data_blocks, extra_isize, attr_magic; 213fb6627a3fb4fbcb6904716c7a59e5ef9eb5dfafbEric Sandeen int has_extents = 0; 214416c1de94ddf7199aedaf7b039292a36b92699fbZheng Liu int has_inline_data = 0; 2151e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o int islnk = 0; 2167331196a16e57ef80dd6ae40eeeab14747ce2f5dTheodore Ts'o __u32 *eaf, *eat; 2177331196a16e57ef80dd6ae40eeeab14747ce2f5dTheodore Ts'o 2181e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o if (hostorder && LINUX_S_ISLNK(f->i_mode)) 2191e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o islnk = 1; 2201e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o t->i_mode = ext2fs_swab16(f->i_mode); 2211e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o if (!hostorder && LINUX_S_ISLNK(t->i_mode)) 2221e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o islnk = 1; 2231e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o t->i_uid = ext2fs_swab16(f->i_uid); 2241e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o t->i_size = ext2fs_swab32(f->i_size); 2251e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o t->i_atime = ext2fs_swab32(f->i_atime); 2261e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o t->i_ctime = ext2fs_swab32(f->i_ctime); 2271e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o t->i_mtime = ext2fs_swab32(f->i_mtime); 2281e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o t->i_dtime = ext2fs_swab32(f->i_dtime); 2291e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o t->i_gid = ext2fs_swab16(f->i_gid); 2301e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o t->i_links_count = ext2fs_swab16(f->i_links_count); 231db9097caca17401313c0dc840b4ae683e5b5c1dfEric Sandeen t->i_file_acl = ext2fs_swab32(f->i_file_acl); 2323f4c46e3f9871011a3d4dffbf7a0beb35bd27d08Bryn M. Reeves if (hostorder) 233efc6f628e15de95bcd13e4f0ee223cb42115d520Theodore Ts'o has_data_blocks = ext2fs_inode_data_blocks(fs, 2343f4c46e3f9871011a3d4dffbf7a0beb35bd27d08Bryn M. Reeves (struct ext2_inode *) f); 2351e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o t->i_blocks = ext2fs_swab32(f->i_blocks); 2363f4c46e3f9871011a3d4dffbf7a0beb35bd27d08Bryn M. Reeves if (!hostorder) 237efc6f628e15de95bcd13e4f0ee223cb42115d520Theodore Ts'o has_data_blocks = ext2fs_inode_data_blocks(fs, 2383f4c46e3f9871011a3d4dffbf7a0beb35bd27d08Bryn M. Reeves (struct ext2_inode *) t); 2394ce3b77480496a20cf380bd18a8ae4a414b7d4a0Theodore Ts'o if (hostorder && (f->i_flags & EXT4_EXTENTS_FL)) 240fb6627a3fb4fbcb6904716c7a59e5ef9eb5dfafbEric Sandeen has_extents = 1; 241416c1de94ddf7199aedaf7b039292a36b92699fbZheng Liu if (hostorder && (f->i_flags & EXT4_INLINE_DATA_FL)) 242416c1de94ddf7199aedaf7b039292a36b92699fbZheng Liu has_inline_data = 1; 2431e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o t->i_flags = ext2fs_swab32(f->i_flags); 244fb6627a3fb4fbcb6904716c7a59e5ef9eb5dfafbEric Sandeen if (!hostorder && (t->i_flags & EXT4_EXTENTS_FL)) 245fb6627a3fb4fbcb6904716c7a59e5ef9eb5dfafbEric Sandeen has_extents = 1; 2462432a41a58c03be4afdfb12f40e7b7cfe3255145Darrick J. Wong if (!hostorder && (t->i_flags & EXT4_INLINE_DATA_FL)) 247416c1de94ddf7199aedaf7b039292a36b92699fbZheng Liu has_inline_data = 1; 2481ba7a2f2b6a9b152828a06443955a7fb1d139930Theodore Ts'o t->i_dir_acl = ext2fs_swab32(f->i_dir_acl); 249416c1de94ddf7199aedaf7b039292a36b92699fbZheng Liu /* 250416c1de94ddf7199aedaf7b039292a36b92699fbZheng Liu * Extent data and inline data are swapped on access, not here 251416c1de94ddf7199aedaf7b039292a36b92699fbZheng Liu */ 252416c1de94ddf7199aedaf7b039292a36b92699fbZheng Liu if (!has_extents && !has_inline_data && (!islnk || has_data_blocks)) { 2531e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o for (i = 0; i < EXT2_N_BLOCKS; i++) 2541e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o t->i_block[i] = ext2fs_swab32(f->i_block[i]); 2551e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o } else if (t != f) { 2561e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o for (i = 0; i < EXT2_N_BLOCKS; i++) 2571e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o t->i_block[i] = f->i_block[i]; 2581e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o } 259e72a9ba39471364ad2f9397f645ca547090e3485Theodore Ts'o t->i_generation = ext2fs_swab32(f->i_generation); 2601e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o t->i_faddr = ext2fs_swab32(f->i_faddr); 26150e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o 2621e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o switch (fs->super->s_creator_os) { 2631e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o case EXT2_OS_LINUX: 264d362a3fb7ec1a2b46601f55f4dbae83563c27717Theodore Ts'o t->osd1.linux1.l_i_version = 265d362a3fb7ec1a2b46601f55f4dbae83563c27717Theodore Ts'o ext2fs_swab32(f->osd1.linux1.l_i_version); 266efc6f628e15de95bcd13e4f0ee223cb42115d520Theodore Ts'o t->osd2.linux2.l_i_blocks_hi = 2675d17119d14fe1276936c85d7986695a4543b1aa1Theodore Ts'o ext2fs_swab16(f->osd2.linux2.l_i_blocks_hi); 2682ea504bd64dc391530c0eb33904afa27f4156c0eAneesh Kumar K.V t->osd2.linux2.l_i_file_acl_high = 2692ea504bd64dc391530c0eb33904afa27f4156c0eAneesh Kumar K.V ext2fs_swab16(f->osd2.linux2.l_i_file_acl_high); 27080e808fceb61c2061b32593c610893bf07a863eeTheodore Ts'o t->osd2.linux2.l_i_uid_high = 27180e808fceb61c2061b32593c610893bf07a863eeTheodore Ts'o ext2fs_swab16 (f->osd2.linux2.l_i_uid_high); 27280e808fceb61c2061b32593c610893bf07a863eeTheodore Ts'o t->osd2.linux2.l_i_gid_high = 27380e808fceb61c2061b32593c610893bf07a863eeTheodore Ts'o ext2fs_swab16 (f->osd2.linux2.l_i_gid_high); 274ae96c678e15eda2a5d0eea7e1067b449f6604affTheodore Ts'o t->osd2.linux2.l_i_checksum_lo = 275a7a63675af85b4b636e9df4961ca44ea03bf160bDarrick J. Wong ext2fs_swab16(f->osd2.linux2.l_i_checksum_lo); 2761e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o break; 2771e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o case EXT2_OS_HURD: 2781e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o t->osd1.hurd1.h_i_translator = 2791e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o ext2fs_swab32 (f->osd1.hurd1.h_i_translator); 2801e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o t->osd2.hurd2.h_i_frag = f->osd2.hurd2.h_i_frag; 2811e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o t->osd2.hurd2.h_i_fsize = f->osd2.hurd2.h_i_fsize; 2821e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o t->osd2.hurd2.h_i_mode_high = 2831e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o ext2fs_swab16 (f->osd2.hurd2.h_i_mode_high); 2841e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o t->osd2.hurd2.h_i_uid_high = 2851e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o ext2fs_swab16 (f->osd2.hurd2.h_i_uid_high); 2861e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o t->osd2.hurd2.h_i_gid_high = 2871e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o ext2fs_swab16 (f->osd2.hurd2.h_i_gid_high); 2881e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o t->osd2.hurd2.h_i_author = 2891e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o ext2fs_swab32 (f->osd2.hurd2.h_i_author); 2901e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o break; 291c9548bc37e5d0f55308ebbb74b1e19ce7f88ada1Coly Li default: 2921e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o break; 2931e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o } 2947331196a16e57ef80dd6ae40eeeab14747ce2f5dTheodore Ts'o 2957331196a16e57ef80dd6ae40eeeab14747ce2f5dTheodore Ts'o if (bufsize < (int) (sizeof(struct ext2_inode) + sizeof(__u16))) 2967331196a16e57ef80dd6ae40eeeab14747ce2f5dTheodore Ts'o return; /* no i_extra_isize field */ 2977331196a16e57ef80dd6ae40eeeab14747ce2f5dTheodore Ts'o 298c844010cc41e4c293b652d252145df12448e22c6Theodore Ts'o if (hostorder) 299c844010cc41e4c293b652d252145df12448e22c6Theodore Ts'o extra_isize = f->i_extra_isize; 3007331196a16e57ef80dd6ae40eeeab14747ce2f5dTheodore Ts'o t->i_extra_isize = ext2fs_swab16(f->i_extra_isize); 301c844010cc41e4c293b652d252145df12448e22c6Theodore Ts'o if (!hostorder) 302c844010cc41e4c293b652d252145df12448e22c6Theodore Ts'o extra_isize = t->i_extra_isize; 303c844010cc41e4c293b652d252145df12448e22c6Theodore Ts'o if (extra_isize > EXT2_INODE_SIZE(fs->super) - 3047331196a16e57ef80dd6ae40eeeab14747ce2f5dTheodore Ts'o sizeof(struct ext2_inode)) { 3057331196a16e57ef80dd6ae40eeeab14747ce2f5dTheodore Ts'o /* this is error case: i_extra_size is too large */ 3067331196a16e57ef80dd6ae40eeeab14747ce2f5dTheodore Ts'o return; 3077331196a16e57ef80dd6ae40eeeab14747ce2f5dTheodore Ts'o } 3087331196a16e57ef80dd6ae40eeeab14747ce2f5dTheodore Ts'o 309a7a63675af85b4b636e9df4961ca44ea03bf160bDarrick J. Wong if (extra_isize >= 4) 310ae96c678e15eda2a5d0eea7e1067b449f6604affTheodore Ts'o t->i_checksum_hi = ext2fs_swab16(f->i_checksum_hi); 311a7a63675af85b4b636e9df4961ca44ea03bf160bDarrick J. Wong if (extra_isize >= 8) 312ae96c678e15eda2a5d0eea7e1067b449f6604affTheodore Ts'o t->i_ctime_extra = ext2fs_swab32(f->i_ctime_extra); 313a7a63675af85b4b636e9df4961ca44ea03bf160bDarrick J. Wong if (extra_isize >= 12) 314ae96c678e15eda2a5d0eea7e1067b449f6604affTheodore Ts'o t->i_mtime_extra = ext2fs_swab32(f->i_mtime_extra); 315a7a63675af85b4b636e9df4961ca44ea03bf160bDarrick J. Wong if (extra_isize >= 16) 316ae96c678e15eda2a5d0eea7e1067b449f6604affTheodore Ts'o t->i_atime_extra = ext2fs_swab32(f->i_atime_extra); 317a7a63675af85b4b636e9df4961ca44ea03bf160bDarrick J. Wong if (extra_isize >= 20) 318ae96c678e15eda2a5d0eea7e1067b449f6604affTheodore Ts'o t->i_crtime = ext2fs_swab32(f->i_crtime); 319a7a63675af85b4b636e9df4961ca44ea03bf160bDarrick J. Wong if (extra_isize >= 24) 320ae96c678e15eda2a5d0eea7e1067b449f6604affTheodore Ts'o t->i_crtime_extra = ext2fs_swab32(f->i_crtime_extra); 321a7a63675af85b4b636e9df4961ca44ea03bf160bDarrick J. Wong if (extra_isize >= 28) 322ae96c678e15eda2a5d0eea7e1067b449f6604affTheodore Ts'o t->i_version_hi = ext2fs_swab32(f->i_version_hi); 323ae96c678e15eda2a5d0eea7e1067b449f6604affTheodore Ts'o 324c844010cc41e4c293b652d252145df12448e22c6Theodore Ts'o i = sizeof(struct ext2_inode) + extra_isize + sizeof(__u32); 3257331196a16e57ef80dd6ae40eeeab14747ce2f5dTheodore Ts'o if (bufsize < (int) i) 3267331196a16e57ef80dd6ae40eeeab14747ce2f5dTheodore Ts'o return; /* no space for EA magic */ 3277331196a16e57ef80dd6ae40eeeab14747ce2f5dTheodore Ts'o 3287331196a16e57ef80dd6ae40eeeab14747ce2f5dTheodore Ts'o eaf = (__u32 *) (((char *) f) + sizeof(struct ext2_inode) + 329c844010cc41e4c293b652d252145df12448e22c6Theodore Ts'o extra_isize); 3307331196a16e57ef80dd6ae40eeeab14747ce2f5dTheodore Ts'o 33182e541885ea912bc6764b97e2545f851cf7e3ff3Eric Sandeen attr_magic = *eaf; 33282e541885ea912bc6764b97e2545f851cf7e3ff3Eric Sandeen if (!hostorder) 33382e541885ea912bc6764b97e2545f851cf7e3ff3Eric Sandeen attr_magic = ext2fs_swab32(attr_magic); 33482e541885ea912bc6764b97e2545f851cf7e3ff3Eric Sandeen 33582e541885ea912bc6764b97e2545f851cf7e3ff3Eric Sandeen if (attr_magic != EXT2_EXT_ATTR_MAGIC) 3367331196a16e57ef80dd6ae40eeeab14747ce2f5dTheodore Ts'o return; /* it seems no magic here */ 3377331196a16e57ef80dd6ae40eeeab14747ce2f5dTheodore Ts'o 3387331196a16e57ef80dd6ae40eeeab14747ce2f5dTheodore Ts'o eat = (__u32 *) (((char *) t) + sizeof(struct ext2_inode) + 339c844010cc41e4c293b652d252145df12448e22c6Theodore Ts'o extra_isize); 3407331196a16e57ef80dd6ae40eeeab14747ce2f5dTheodore Ts'o *eat = ext2fs_swab32(*eaf); 3417331196a16e57ef80dd6ae40eeeab14747ce2f5dTheodore Ts'o 3427331196a16e57ef80dd6ae40eeeab14747ce2f5dTheodore Ts'o /* convert EA(s) */ 3437331196a16e57ef80dd6ae40eeeab14747ce2f5dTheodore Ts'o ext2fs_swap_ext_attr((char *) (eat + 1), (char *) (eaf + 1), 3447331196a16e57ef80dd6ae40eeeab14747ce2f5dTheodore Ts'o bufsize - sizeof(struct ext2_inode) - 345c844010cc41e4c293b652d252145df12448e22c6Theodore Ts'o extra_isize - sizeof(__u32), 0); 3467331196a16e57ef80dd6ae40eeeab14747ce2f5dTheodore Ts'o 3471e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o} 3487331196a16e57ef80dd6ae40eeeab14747ce2f5dTheodore Ts'o 3497331196a16e57ef80dd6ae40eeeab14747ce2f5dTheodore Ts'ovoid ext2fs_swap_inode(ext2_filsys fs, struct ext2_inode *t, 3507331196a16e57ef80dd6ae40eeeab14747ce2f5dTheodore Ts'o struct ext2_inode *f, int hostorder) 3517331196a16e57ef80dd6ae40eeeab14747ce2f5dTheodore Ts'o{ 3527331196a16e57ef80dd6ae40eeeab14747ce2f5dTheodore Ts'o ext2fs_swap_inode_full(fs, (struct ext2_inode_large *) t, 3537331196a16e57ef80dd6ae40eeeab14747ce2f5dTheodore Ts'o (struct ext2_inode_large *) f, hostorder, 3547331196a16e57ef80dd6ae40eeeab14747ce2f5dTheodore Ts'o sizeof(struct ext2_inode)); 3557331196a16e57ef80dd6ae40eeeab14747ce2f5dTheodore Ts'o} 3567331196a16e57ef80dd6ae40eeeab14747ce2f5dTheodore Ts'o 3570f5eba7501f467f757792ee449d16c9259b994fdAndreas Dilgervoid ext2fs_swap_mmp(struct mmp_struct *mmp) 3580f5eba7501f467f757792ee449d16c9259b994fdAndreas Dilger{ 3590f5eba7501f467f757792ee449d16c9259b994fdAndreas Dilger mmp->mmp_magic = ext2fs_swab32(mmp->mmp_magic); 3600f5eba7501f467f757792ee449d16c9259b994fdAndreas Dilger mmp->mmp_seq = ext2fs_swab32(mmp->mmp_seq); 3610f5eba7501f467f757792ee449d16c9259b994fdAndreas Dilger mmp->mmp_time = ext2fs_swab64(mmp->mmp_time); 3620f5eba7501f467f757792ee449d16c9259b994fdAndreas Dilger mmp->mmp_check_interval = ext2fs_swab16(mmp->mmp_check_interval); 363a9620d8b308271ace63dd0787555fa715d09e0f8Darrick J. Wong mmp->mmp_checksum = ext2fs_swab32(mmp->mmp_checksum); 3640f5eba7501f467f757792ee449d16c9259b994fdAndreas Dilger} 3650f5eba7501f467f757792ee449d16c9259b994fdAndreas Dilger 36681683c6a32045cf04d76a024e6f1753535b97c22Darrick J. Wongerrcode_t ext2fs_dirent_swab_in(ext2_filsys fs, char *buf, int flags) 36781683c6a32045cf04d76a024e6f1753535b97c22Darrick J. Wong{ 368f9574ad0ba655b436b3940ff1604df4d11a43115Theodore Ts'o return ext2fs_dirent_swab_in2(fs, buf, fs->blocksize, flags); 36911f9374660acd119c832c01aa6ed65bc449e43b8Zheng Liu} 37011f9374660acd119c832c01aa6ed65bc449e43b8Zheng Liu 37111f9374660acd119c832c01aa6ed65bc449e43b8Zheng Liuerrcode_t ext2fs_dirent_swab_in2(ext2_filsys fs, char *buf, 37211f9374660acd119c832c01aa6ed65bc449e43b8Zheng Liu size_t size, int flags) 37311f9374660acd119c832c01aa6ed65bc449e43b8Zheng Liu{ 37481683c6a32045cf04d76a024e6f1753535b97c22Darrick J. Wong errcode_t retval; 37581683c6a32045cf04d76a024e6f1753535b97c22Darrick J. Wong char *p, *end; 37681683c6a32045cf04d76a024e6f1753535b97c22Darrick J. Wong struct ext2_dir_entry *dirent; 37781683c6a32045cf04d76a024e6f1753535b97c22Darrick J. Wong unsigned int name_len, rec_len; 37881683c6a32045cf04d76a024e6f1753535b97c22Darrick J. Wong 37981683c6a32045cf04d76a024e6f1753535b97c22Darrick J. Wong p = (char *) buf; 38011f9374660acd119c832c01aa6ed65bc449e43b8Zheng Liu end = (char *) buf + size; 38181683c6a32045cf04d76a024e6f1753535b97c22Darrick J. Wong while (p < end-8) { 38281683c6a32045cf04d76a024e6f1753535b97c22Darrick J. Wong dirent = (struct ext2_dir_entry *) p; 38381683c6a32045cf04d76a024e6f1753535b97c22Darrick J. Wong dirent->inode = ext2fs_swab32(dirent->inode); 38481683c6a32045cf04d76a024e6f1753535b97c22Darrick J. Wong dirent->rec_len = ext2fs_swab16(dirent->rec_len); 38581683c6a32045cf04d76a024e6f1753535b97c22Darrick J. Wong dirent->name_len = ext2fs_swab16(dirent->name_len); 38681683c6a32045cf04d76a024e6f1753535b97c22Darrick J. Wong name_len = dirent->name_len; 38781683c6a32045cf04d76a024e6f1753535b97c22Darrick J. Wong if (flags & EXT2_DIRBLOCK_V2_STRUCT) 38881683c6a32045cf04d76a024e6f1753535b97c22Darrick J. Wong dirent->name_len = ext2fs_swab16(dirent->name_len); 38981683c6a32045cf04d76a024e6f1753535b97c22Darrick J. Wong retval = ext2fs_get_rec_len(fs, dirent, &rec_len); 39081683c6a32045cf04d76a024e6f1753535b97c22Darrick J. Wong if (retval) 39181683c6a32045cf04d76a024e6f1753535b97c22Darrick J. Wong return retval; 39281683c6a32045cf04d76a024e6f1753535b97c22Darrick J. Wong if ((rec_len < 8) || (rec_len % 4)) { 39381683c6a32045cf04d76a024e6f1753535b97c22Darrick J. Wong rec_len = 8; 39481683c6a32045cf04d76a024e6f1753535b97c22Darrick J. Wong retval = EXT2_ET_DIR_CORRUPTED; 39581683c6a32045cf04d76a024e6f1753535b97c22Darrick J. Wong } else if (((name_len & 0xFF) + 8) > rec_len) 39681683c6a32045cf04d76a024e6f1753535b97c22Darrick J. Wong retval = EXT2_ET_DIR_CORRUPTED; 39781683c6a32045cf04d76a024e6f1753535b97c22Darrick J. Wong p += rec_len; 39881683c6a32045cf04d76a024e6f1753535b97c22Darrick J. Wong } 39981683c6a32045cf04d76a024e6f1753535b97c22Darrick J. Wong 40081683c6a32045cf04d76a024e6f1753535b97c22Darrick J. Wong return 0; 40181683c6a32045cf04d76a024e6f1753535b97c22Darrick J. Wong} 40281683c6a32045cf04d76a024e6f1753535b97c22Darrick J. Wong 40381683c6a32045cf04d76a024e6f1753535b97c22Darrick J. Wongerrcode_t ext2fs_dirent_swab_out(ext2_filsys fs, char *buf, int flags) 40481683c6a32045cf04d76a024e6f1753535b97c22Darrick J. Wong{ 40511f9374660acd119c832c01aa6ed65bc449e43b8Zheng Liu return ext2fs_dirent_swab_out2(fs, buf, fs->blocksize, flags); 40611f9374660acd119c832c01aa6ed65bc449e43b8Zheng Liu} 40711f9374660acd119c832c01aa6ed65bc449e43b8Zheng Liu 40811f9374660acd119c832c01aa6ed65bc449e43b8Zheng Liuerrcode_t ext2fs_dirent_swab_out2(ext2_filsys fs, char *buf, 40911f9374660acd119c832c01aa6ed65bc449e43b8Zheng Liu size_t size, int flags) 41011f9374660acd119c832c01aa6ed65bc449e43b8Zheng Liu{ 41181683c6a32045cf04d76a024e6f1753535b97c22Darrick J. Wong errcode_t retval; 41281683c6a32045cf04d76a024e6f1753535b97c22Darrick J. Wong char *p, *end; 41381683c6a32045cf04d76a024e6f1753535b97c22Darrick J. Wong unsigned int rec_len; 41481683c6a32045cf04d76a024e6f1753535b97c22Darrick J. Wong struct ext2_dir_entry *dirent; 41581683c6a32045cf04d76a024e6f1753535b97c22Darrick J. Wong 41681683c6a32045cf04d76a024e6f1753535b97c22Darrick J. Wong p = buf; 41711f9374660acd119c832c01aa6ed65bc449e43b8Zheng Liu end = buf + size; 41881683c6a32045cf04d76a024e6f1753535b97c22Darrick J. Wong while (p < end) { 41981683c6a32045cf04d76a024e6f1753535b97c22Darrick J. Wong dirent = (struct ext2_dir_entry *) p; 42081683c6a32045cf04d76a024e6f1753535b97c22Darrick J. Wong retval = ext2fs_get_rec_len(fs, dirent, &rec_len); 42181683c6a32045cf04d76a024e6f1753535b97c22Darrick J. Wong if (retval) 42281683c6a32045cf04d76a024e6f1753535b97c22Darrick J. Wong return retval; 42381683c6a32045cf04d76a024e6f1753535b97c22Darrick J. Wong if ((rec_len < 8) || 42481683c6a32045cf04d76a024e6f1753535b97c22Darrick J. Wong (rec_len % 4)) { 42581683c6a32045cf04d76a024e6f1753535b97c22Darrick J. Wong ext2fs_free_mem(&buf); 42681683c6a32045cf04d76a024e6f1753535b97c22Darrick J. Wong return EXT2_ET_DIR_CORRUPTED; 42781683c6a32045cf04d76a024e6f1753535b97c22Darrick J. Wong } 42881683c6a32045cf04d76a024e6f1753535b97c22Darrick J. Wong p += rec_len; 42981683c6a32045cf04d76a024e6f1753535b97c22Darrick J. Wong dirent->inode = ext2fs_swab32(dirent->inode); 43081683c6a32045cf04d76a024e6f1753535b97c22Darrick J. Wong dirent->rec_len = ext2fs_swab16(dirent->rec_len); 43181683c6a32045cf04d76a024e6f1753535b97c22Darrick J. Wong dirent->name_len = ext2fs_swab16(dirent->name_len); 43281683c6a32045cf04d76a024e6f1753535b97c22Darrick J. Wong 43381683c6a32045cf04d76a024e6f1753535b97c22Darrick J. Wong if (flags & EXT2_DIRBLOCK_V2_STRUCT) 43481683c6a32045cf04d76a024e6f1753535b97c22Darrick J. Wong dirent->name_len = ext2fs_swab16(dirent->name_len); 43581683c6a32045cf04d76a024e6f1753535b97c22Darrick J. Wong } 43681683c6a32045cf04d76a024e6f1753535b97c22Darrick J. Wong 43781683c6a32045cf04d76a024e6f1753535b97c22Darrick J. Wong return 0; 43881683c6a32045cf04d76a024e6f1753535b97c22Darrick J. Wong} 43981683c6a32045cf04d76a024e6f1753535b97c22Darrick J. Wong 4405df55d7f847e29d23227592a0bb23daad1a61500Theodore Ts'o#endif 441