Theodore Ts'o | 50e1e10 | 1997-04-26 13:58:21 +0000 | [diff] [blame] | 1 | /* |
| 2 | * swapfs.c --- swap ext2 filesystem data structures |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 3 | * |
Theodore Ts'o | 8132d84 | 2002-10-02 22:07:17 -0400 | [diff] [blame] | 4 | * Copyright (C) 1995, 1996, 2002 Theodore Ts'o. |
Theodore Ts'o | 19c78dc | 1997-04-29 16:17:09 +0000 | [diff] [blame] | 5 | * |
| 6 | * %Begin-Header% |
Theodore Ts'o | 543547a | 2010-05-17 21:31:56 -0400 | [diff] [blame] | 7 | * This file may be redistributed under the terms of the GNU Library |
| 8 | * General Public License, version 2. |
Theodore Ts'o | 19c78dc | 1997-04-29 16:17:09 +0000 | [diff] [blame] | 9 | * %End-Header% |
Theodore Ts'o | 50e1e10 | 1997-04-26 13:58:21 +0000 | [diff] [blame] | 10 | */ |
| 11 | |
| 12 | #include <stdio.h> |
Theodore Ts'o | 4cbe8af | 1997-08-10 23:07:40 +0000 | [diff] [blame] | 13 | #if HAVE_UNISTD_H |
Theodore Ts'o | 50e1e10 | 1997-04-26 13:58:21 +0000 | [diff] [blame] | 14 | #include <unistd.h> |
Theodore Ts'o | 4cbe8af | 1997-08-10 23:07:40 +0000 | [diff] [blame] | 15 | #endif |
Theodore Ts'o | 7331196 | 2005-01-25 23:42:56 -0500 | [diff] [blame] | 16 | #include <string.h> |
Theodore Ts'o | 50e1e10 | 1997-04-26 13:58:21 +0000 | [diff] [blame] | 17 | #include <time.h> |
| 18 | |
Theodore Ts'o | b5abe6f | 1998-01-19 14:47:53 +0000 | [diff] [blame] | 19 | #include "ext2_fs.h" |
Theodore Ts'o | 50e1e10 | 1997-04-26 13:58:21 +0000 | [diff] [blame] | 20 | #include "ext2fs.h" |
Theodore Ts'o | 7331196 | 2005-01-25 23:42:56 -0500 | [diff] [blame] | 21 | #include <ext2fs/ext2_ext_attr.h> |
Theodore Ts'o | 50e1e10 | 1997-04-26 13:58:21 +0000 | [diff] [blame] | 22 | |
Theodore Ts'o | a5dda05 | 2007-08-11 03:11:12 -0400 | [diff] [blame] | 23 | #ifdef WORDS_BIGENDIAN |
Theodore Ts'o | e5b38a5 | 2001-01-01 16:17:12 +0000 | [diff] [blame] | 24 | void ext2fs_swap_super(struct ext2_super_block * sb) |
Theodore Ts'o | 50e1e10 | 1997-04-26 13:58:21 +0000 | [diff] [blame] | 25 | { |
Theodore Ts'o | 8132d84 | 2002-10-02 22:07:17 -0400 | [diff] [blame] | 26 | int i; |
Theodore Ts'o | e5b38a5 | 2001-01-01 16:17:12 +0000 | [diff] [blame] | 27 | sb->s_inodes_count = ext2fs_swab32(sb->s_inodes_count); |
| 28 | sb->s_blocks_count = ext2fs_swab32(sb->s_blocks_count); |
| 29 | sb->s_r_blocks_count = ext2fs_swab32(sb->s_r_blocks_count); |
| 30 | sb->s_free_blocks_count = ext2fs_swab32(sb->s_free_blocks_count); |
| 31 | sb->s_free_inodes_count = ext2fs_swab32(sb->s_free_inodes_count); |
| 32 | sb->s_first_data_block = ext2fs_swab32(sb->s_first_data_block); |
| 33 | sb->s_log_block_size = ext2fs_swab32(sb->s_log_block_size); |
JP Abgrall | e0ed740 | 2014-03-19 19:08:39 -0700 | [diff] [blame] | 34 | sb->s_log_cluster_size = ext2fs_swab32(sb->s_log_cluster_size); |
Theodore Ts'o | e5b38a5 | 2001-01-01 16:17:12 +0000 | [diff] [blame] | 35 | sb->s_blocks_per_group = ext2fs_swab32(sb->s_blocks_per_group); |
JP Abgrall | e0ed740 | 2014-03-19 19:08:39 -0700 | [diff] [blame] | 36 | sb->s_clusters_per_group = ext2fs_swab32(sb->s_clusters_per_group); |
Theodore Ts'o | e5b38a5 | 2001-01-01 16:17:12 +0000 | [diff] [blame] | 37 | sb->s_inodes_per_group = ext2fs_swab32(sb->s_inodes_per_group); |
| 38 | sb->s_mtime = ext2fs_swab32(sb->s_mtime); |
| 39 | sb->s_wtime = ext2fs_swab32(sb->s_wtime); |
| 40 | sb->s_mnt_count = ext2fs_swab16(sb->s_mnt_count); |
| 41 | sb->s_max_mnt_count = ext2fs_swab16(sb->s_max_mnt_count); |
| 42 | sb->s_magic = ext2fs_swab16(sb->s_magic); |
| 43 | sb->s_state = ext2fs_swab16(sb->s_state); |
| 44 | sb->s_errors = ext2fs_swab16(sb->s_errors); |
| 45 | sb->s_minor_rev_level = ext2fs_swab16(sb->s_minor_rev_level); |
| 46 | sb->s_lastcheck = ext2fs_swab32(sb->s_lastcheck); |
| 47 | sb->s_checkinterval = ext2fs_swab32(sb->s_checkinterval); |
| 48 | sb->s_creator_os = ext2fs_swab32(sb->s_creator_os); |
| 49 | sb->s_rev_level = ext2fs_swab32(sb->s_rev_level); |
| 50 | sb->s_def_resuid = ext2fs_swab16(sb->s_def_resuid); |
| 51 | sb->s_def_resgid = ext2fs_swab16(sb->s_def_resgid); |
| 52 | sb->s_first_ino = ext2fs_swab32(sb->s_first_ino); |
| 53 | sb->s_inode_size = ext2fs_swab16(sb->s_inode_size); |
| 54 | sb->s_block_group_nr = ext2fs_swab16(sb->s_block_group_nr); |
| 55 | sb->s_feature_compat = ext2fs_swab32(sb->s_feature_compat); |
| 56 | sb->s_feature_incompat = ext2fs_swab32(sb->s_feature_incompat); |
| 57 | sb->s_feature_ro_compat = ext2fs_swab32(sb->s_feature_ro_compat); |
| 58 | sb->s_algorithm_usage_bitmap = ext2fs_swab32(sb->s_algorithm_usage_bitmap); |
Theodore Ts'o | 5d28e3b | 2004-12-22 20:55:48 -0500 | [diff] [blame] | 59 | sb->s_reserved_gdt_blocks = ext2fs_swab16(sb->s_reserved_gdt_blocks); |
Theodore Ts'o | e5b38a5 | 2001-01-01 16:17:12 +0000 | [diff] [blame] | 60 | sb->s_journal_inum = ext2fs_swab32(sb->s_journal_inum); |
| 61 | sb->s_journal_dev = ext2fs_swab32(sb->s_journal_dev); |
| 62 | sb->s_last_orphan = ext2fs_swab32(sb->s_last_orphan); |
Theodore Ts'o | 8061d2c | 2006-11-11 09:44:47 -0500 | [diff] [blame] | 63 | sb->s_desc_size = ext2fs_swab16(sb->s_desc_size); |
Theodore Ts'o | 1ba7a2f | 2004-01-30 01:48:06 -0500 | [diff] [blame] | 64 | sb->s_default_mount_opts = ext2fs_swab32(sb->s_default_mount_opts); |
Theodore Ts'o | c046ac7 | 2002-10-20 00:38:57 -0400 | [diff] [blame] | 65 | sb->s_first_meta_bg = ext2fs_swab32(sb->s_first_meta_bg); |
Theodore Ts'o | 1ba7a2f | 2004-01-30 01:48:06 -0500 | [diff] [blame] | 66 | sb->s_mkfs_time = ext2fs_swab32(sb->s_mkfs_time); |
Theodore Ts'o | 6b3ce98 | 2006-11-11 09:45:22 -0500 | [diff] [blame] | 67 | sb->s_blocks_count_hi = ext2fs_swab32(sb->s_blocks_count_hi); |
| 68 | sb->s_r_blocks_count_hi = ext2fs_swab32(sb->s_r_blocks_count_hi); |
| 69 | sb->s_free_blocks_hi = ext2fs_swab32(sb->s_free_blocks_hi); |
| 70 | sb->s_min_extra_isize = ext2fs_swab16(sb->s_min_extra_isize); |
| 71 | sb->s_want_extra_isize = ext2fs_swab16(sb->s_want_extra_isize); |
Theodore Ts'o | f77704e | 2006-11-11 22:32:35 -0500 | [diff] [blame] | 72 | sb->s_flags = ext2fs_swab32(sb->s_flags); |
JP Abgrall | e0ed740 | 2014-03-19 19:08:39 -0700 | [diff] [blame] | 73 | sb->s_mmp_update_interval = ext2fs_swab16(sb->s_mmp_update_interval); |
| 74 | sb->s_mmp_block = ext2fs_swab64(sb->s_mmp_block); |
Theodore Ts'o | b7c5b40 | 2009-03-05 19:40:20 -0500 | [diff] [blame] | 75 | sb->s_kbytes_written = ext2fs_swab64(sb->s_kbytes_written); |
Theodore Ts'o | f5448c1 | 2010-06-24 21:08:37 -0400 | [diff] [blame] | 76 | sb->s_snapshot_inum = ext2fs_swab32(sb->s_snapshot_inum); |
Theodore Ts'o | ccc7cf0 | 2010-07-30 18:41:47 -0400 | [diff] [blame] | 77 | sb->s_snapshot_id = ext2fs_swab32(sb->s_snapshot_id); |
Theodore Ts'o | f5448c1 | 2010-06-24 21:08:37 -0400 | [diff] [blame] | 78 | sb->s_snapshot_r_blocks_count = |
| 79 | ext2fs_swab64(sb->s_snapshot_r_blocks_count); |
| 80 | sb->s_snapshot_list = ext2fs_swab32(sb->s_snapshot_list); |
JP Abgrall | e0ed740 | 2014-03-19 19:08:39 -0700 | [diff] [blame] | 81 | sb->s_usr_quota_inum = ext2fs_swab32(sb->s_usr_quota_inum); |
| 82 | sb->s_grp_quota_inum = ext2fs_swab32(sb->s_grp_quota_inum); |
| 83 | sb->s_overhead_blocks = ext2fs_swab32(sb->s_overhead_blocks); |
| 84 | sb->s_checksum = ext2fs_swab32(sb->s_checksum); |
Theodore Ts'o | f5448c1 | 2010-06-24 21:08:37 -0400 | [diff] [blame] | 85 | |
Theodore Ts'o | 8132d84 | 2002-10-02 22:07:17 -0400 | [diff] [blame] | 86 | for (i=0; i < 4; i++) |
| 87 | sb->s_hash_seed[i] = ext2fs_swab32(sb->s_hash_seed[i]); |
Eric Sandeen | 6eb229d | 2009-11-10 14:45:44 -0600 | [diff] [blame] | 88 | |
| 89 | /* if journal backup is for a valid extent-based journal... */ |
JP Abgrall | e0ed740 | 2014-03-19 19:08:39 -0700 | [diff] [blame] | 90 | if (ext2fs_extent_header_verify(sb->s_jnl_blocks, |
| 91 | sizeof(sb->s_jnl_blocks)) == 0) { |
| 92 | /* ... swap only the journal i_size and i_size_high, |
| 93 | * and the extent data is not swapped on read */ |
| 94 | i = 15; |
| 95 | } else { |
| 96 | /* direct/indirect journal: swap it all */ |
| 97 | i = 0; |
Eric Sandeen | 6eb229d | 2009-11-10 14:45:44 -0600 | [diff] [blame] | 98 | } |
JP Abgrall | e0ed740 | 2014-03-19 19:08:39 -0700 | [diff] [blame] | 99 | for (; i < 17; i++) |
Theodore Ts'o | 1ba7a2f | 2004-01-30 01:48:06 -0500 | [diff] [blame] | 100 | sb->s_jnl_blocks[i] = ext2fs_swab32(sb->s_jnl_blocks[i]); |
Theodore Ts'o | 50e1e10 | 1997-04-26 13:58:21 +0000 | [diff] [blame] | 101 | } |
| 102 | |
JP Abgrall | e0ed740 | 2014-03-19 19:08:39 -0700 | [diff] [blame] | 103 | void ext2fs_swap_group_desc2(ext2_filsys fs, struct ext2_group_desc *gdp) |
Theodore Ts'o | 50e1e10 | 1997-04-26 13:58:21 +0000 | [diff] [blame] | 104 | { |
JP Abgrall | e0ed740 | 2014-03-19 19:08:39 -0700 | [diff] [blame] | 105 | struct ext4_group_desc *gdp4 = (struct ext4_group_desc *)gdp; |
| 106 | |
| 107 | /* Do the 32-bit parts first */ |
Theodore Ts'o | 50e1e10 | 1997-04-26 13:58:21 +0000 | [diff] [blame] | 108 | gdp->bg_block_bitmap = ext2fs_swab32(gdp->bg_block_bitmap); |
| 109 | gdp->bg_inode_bitmap = ext2fs_swab32(gdp->bg_inode_bitmap); |
| 110 | gdp->bg_inode_table = ext2fs_swab32(gdp->bg_inode_table); |
| 111 | gdp->bg_free_blocks_count = ext2fs_swab16(gdp->bg_free_blocks_count); |
| 112 | gdp->bg_free_inodes_count = ext2fs_swab16(gdp->bg_free_inodes_count); |
| 113 | gdp->bg_used_dirs_count = ext2fs_swab16(gdp->bg_used_dirs_count); |
Theodore Ts'o | f5fa200 | 2006-05-08 20:17:26 -0400 | [diff] [blame] | 114 | gdp->bg_flags = ext2fs_swab16(gdp->bg_flags); |
JP Abgrall | e0ed740 | 2014-03-19 19:08:39 -0700 | [diff] [blame] | 115 | gdp->bg_exclude_bitmap_lo = ext2fs_swab32(gdp->bg_exclude_bitmap_lo); |
| 116 | gdp->bg_block_bitmap_csum_lo = |
| 117 | ext2fs_swab16(gdp->bg_block_bitmap_csum_lo); |
| 118 | gdp->bg_inode_bitmap_csum_lo = |
| 119 | ext2fs_swab16(gdp->bg_inode_bitmap_csum_lo); |
Theodore Ts'o | 8815fb8 | 2006-11-11 09:41:52 -0500 | [diff] [blame] | 120 | gdp->bg_itable_unused = ext2fs_swab16(gdp->bg_itable_unused); |
| 121 | gdp->bg_checksum = ext2fs_swab16(gdp->bg_checksum); |
JP Abgrall | e0ed740 | 2014-03-19 19:08:39 -0700 | [diff] [blame] | 122 | /* If we're 32-bit, we're done */ |
| 123 | if (fs == NULL || EXT2_DESC_SIZE(fs->super) < EXT2_MIN_DESC_SIZE_64BIT) |
| 124 | return; |
| 125 | |
| 126 | /* Swap the 64-bit parts */ |
| 127 | gdp4->bg_block_bitmap_hi = ext2fs_swab32(gdp4->bg_block_bitmap_hi); |
| 128 | gdp4->bg_inode_bitmap_hi = ext2fs_swab32(gdp4->bg_inode_bitmap_hi); |
| 129 | gdp4->bg_inode_table_hi = ext2fs_swab32(gdp4->bg_inode_table_hi); |
| 130 | gdp4->bg_free_blocks_count_hi = |
| 131 | ext2fs_swab16(gdp4->bg_free_blocks_count_hi); |
| 132 | gdp4->bg_free_inodes_count_hi = |
| 133 | ext2fs_swab16(gdp4->bg_free_inodes_count_hi); |
| 134 | gdp4->bg_used_dirs_count_hi = |
| 135 | ext2fs_swab16(gdp4->bg_used_dirs_count_hi); |
| 136 | gdp4->bg_itable_unused_hi = ext2fs_swab16(gdp4->bg_itable_unused_hi); |
| 137 | gdp4->bg_exclude_bitmap_hi = ext2fs_swab16(gdp4->bg_exclude_bitmap_hi); |
| 138 | gdp4->bg_block_bitmap_csum_hi = |
| 139 | ext2fs_swab16(gdp4->bg_block_bitmap_csum_hi); |
| 140 | gdp4->bg_inode_bitmap_csum_hi = |
| 141 | ext2fs_swab16(gdp4->bg_inode_bitmap_csum_hi); |
Theodore Ts'o | 50e1e10 | 1997-04-26 13:58:21 +0000 | [diff] [blame] | 142 | } |
| 143 | |
JP Abgrall | e0ed740 | 2014-03-19 19:08:39 -0700 | [diff] [blame] | 144 | void ext2fs_swap_group_desc(struct ext2_group_desc *gdp) |
| 145 | { |
| 146 | ext2fs_swap_group_desc2(0, gdp); |
| 147 | } |
| 148 | |
| 149 | |
Andreas Dilger | fefaef3 | 2008-02-02 01:16:32 -0700 | [diff] [blame] | 150 | void ext2fs_swap_ext_attr_header(struct ext2_ext_attr_header *to_header, |
| 151 | struct ext2_ext_attr_header *from_header) |
| 152 | { |
| 153 | int n; |
| 154 | |
| 155 | to_header->h_magic = ext2fs_swab32(from_header->h_magic); |
| 156 | to_header->h_blocks = ext2fs_swab32(from_header->h_blocks); |
| 157 | to_header->h_refcount = ext2fs_swab32(from_header->h_refcount); |
| 158 | to_header->h_hash = ext2fs_swab32(from_header->h_hash); |
| 159 | for (n = 0; n < 4; n++) |
| 160 | to_header->h_reserved[n] = |
| 161 | ext2fs_swab32(from_header->h_reserved[n]); |
| 162 | } |
| 163 | |
| 164 | void ext2fs_swap_ext_attr_entry(struct ext2_ext_attr_entry *to_entry, |
| 165 | struct ext2_ext_attr_entry *from_entry) |
| 166 | { |
| 167 | to_entry->e_value_offs = ext2fs_swab16(from_entry->e_value_offs); |
| 168 | to_entry->e_value_block = ext2fs_swab32(from_entry->e_value_block); |
| 169 | to_entry->e_value_size = ext2fs_swab32(from_entry->e_value_size); |
| 170 | to_entry->e_hash = ext2fs_swab32(from_entry->e_hash); |
| 171 | } |
| 172 | |
Theodore Ts'o | 7331196 | 2005-01-25 23:42:56 -0500 | [diff] [blame] | 173 | void ext2fs_swap_ext_attr(char *to, char *from, int bufsize, int has_header) |
| 174 | { |
| 175 | struct ext2_ext_attr_header *from_header = |
| 176 | (struct ext2_ext_attr_header *)from; |
| 177 | struct ext2_ext_attr_header *to_header = |
| 178 | (struct ext2_ext_attr_header *)to; |
| 179 | struct ext2_ext_attr_entry *from_entry, *to_entry; |
| 180 | char *from_end = (char *)from_header + bufsize; |
Theodore Ts'o | 7331196 | 2005-01-25 23:42:56 -0500 | [diff] [blame] | 181 | |
| 182 | if (to_header != from_header) |
| 183 | memcpy(to_header, from_header, bufsize); |
| 184 | |
Theodore Ts'o | 7331196 | 2005-01-25 23:42:56 -0500 | [diff] [blame] | 185 | if (has_header) { |
Andreas Dilger | fefaef3 | 2008-02-02 01:16:32 -0700 | [diff] [blame] | 186 | ext2fs_swap_ext_attr_header(to_header, from_header); |
| 187 | |
Theodore Ts'o | 7331196 | 2005-01-25 23:42:56 -0500 | [diff] [blame] | 188 | from_entry = (struct ext2_ext_attr_entry *)(from_header+1); |
| 189 | to_entry = (struct ext2_ext_attr_entry *)(to_header+1); |
Andreas Dilger | fefaef3 | 2008-02-02 01:16:32 -0700 | [diff] [blame] | 190 | } else { |
| 191 | from_entry = (struct ext2_ext_attr_entry *)from_header; |
| 192 | to_entry = (struct ext2_ext_attr_entry *)to_header; |
Theodore Ts'o | 7331196 | 2005-01-25 23:42:56 -0500 | [diff] [blame] | 193 | } |
| 194 | |
| 195 | while ((char *)from_entry < from_end && *(__u32 *)from_entry) { |
Andreas Dilger | fefaef3 | 2008-02-02 01:16:32 -0700 | [diff] [blame] | 196 | ext2fs_swap_ext_attr_entry(to_entry, from_entry); |
Theodore Ts'o | 7331196 | 2005-01-25 23:42:56 -0500 | [diff] [blame] | 197 | from_entry = EXT2_EXT_ATTR_NEXT(from_entry); |
| 198 | to_entry = EXT2_EXT_ATTR_NEXT(to_entry); |
| 199 | } |
| 200 | } |
| 201 | |
| 202 | void ext2fs_swap_inode_full(ext2_filsys fs, struct ext2_inode_large *t, |
| 203 | struct ext2_inode_large *f, int hostorder, |
| 204 | int bufsize) |
Theodore Ts'o | 1e3472c | 1997-04-29 14:53:37 +0000 | [diff] [blame] | 205 | { |
Eric Sandeen | 82e5418 | 2008-02-29 16:10:21 -0600 | [diff] [blame] | 206 | unsigned i, has_data_blocks, extra_isize, attr_magic; |
Eric Sandeen | fb6627a | 2008-03-24 08:25:40 -0400 | [diff] [blame] | 207 | int has_extents = 0; |
Theodore Ts'o | 1e3472c | 1997-04-29 14:53:37 +0000 | [diff] [blame] | 208 | int islnk = 0; |
Theodore Ts'o | 7331196 | 2005-01-25 23:42:56 -0500 | [diff] [blame] | 209 | __u32 *eaf, *eat; |
| 210 | |
Theodore Ts'o | 1e3472c | 1997-04-29 14:53:37 +0000 | [diff] [blame] | 211 | if (hostorder && LINUX_S_ISLNK(f->i_mode)) |
| 212 | islnk = 1; |
| 213 | t->i_mode = ext2fs_swab16(f->i_mode); |
| 214 | if (!hostorder && LINUX_S_ISLNK(t->i_mode)) |
| 215 | islnk = 1; |
| 216 | t->i_uid = ext2fs_swab16(f->i_uid); |
| 217 | t->i_size = ext2fs_swab32(f->i_size); |
| 218 | t->i_atime = ext2fs_swab32(f->i_atime); |
| 219 | t->i_ctime = ext2fs_swab32(f->i_ctime); |
| 220 | t->i_mtime = ext2fs_swab32(f->i_mtime); |
| 221 | t->i_dtime = ext2fs_swab32(f->i_dtime); |
| 222 | t->i_gid = ext2fs_swab16(f->i_gid); |
| 223 | t->i_links_count = ext2fs_swab16(f->i_links_count); |
Eric Sandeen | db9097c | 2007-07-17 20:40:25 -0500 | [diff] [blame] | 224 | t->i_file_acl = ext2fs_swab32(f->i_file_acl); |
Bryn M. Reeves | 3f4c46e | 2007-04-14 14:00:31 -0400 | [diff] [blame] | 225 | if (hostorder) |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 226 | has_data_blocks = ext2fs_inode_data_blocks(fs, |
Bryn M. Reeves | 3f4c46e | 2007-04-14 14:00:31 -0400 | [diff] [blame] | 227 | (struct ext2_inode *) f); |
Theodore Ts'o | 1e3472c | 1997-04-29 14:53:37 +0000 | [diff] [blame] | 228 | t->i_blocks = ext2fs_swab32(f->i_blocks); |
Bryn M. Reeves | 3f4c46e | 2007-04-14 14:00:31 -0400 | [diff] [blame] | 229 | if (!hostorder) |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 230 | has_data_blocks = ext2fs_inode_data_blocks(fs, |
Bryn M. Reeves | 3f4c46e | 2007-04-14 14:00:31 -0400 | [diff] [blame] | 231 | (struct ext2_inode *) t); |
Theodore Ts'o | 4ce3b77 | 2007-09-01 09:10:43 -0400 | [diff] [blame] | 232 | if (hostorder && (f->i_flags & EXT4_EXTENTS_FL)) |
Eric Sandeen | fb6627a | 2008-03-24 08:25:40 -0400 | [diff] [blame] | 233 | has_extents = 1; |
Theodore Ts'o | 1e3472c | 1997-04-29 14:53:37 +0000 | [diff] [blame] | 234 | t->i_flags = ext2fs_swab32(f->i_flags); |
Eric Sandeen | fb6627a | 2008-03-24 08:25:40 -0400 | [diff] [blame] | 235 | if (!hostorder && (t->i_flags & EXT4_EXTENTS_FL)) |
| 236 | has_extents = 1; |
Theodore Ts'o | 1ba7a2f | 2004-01-30 01:48:06 -0500 | [diff] [blame] | 237 | t->i_dir_acl = ext2fs_swab32(f->i_dir_acl); |
Eric Sandeen | fb6627a | 2008-03-24 08:25:40 -0400 | [diff] [blame] | 238 | /* extent data are swapped on access, not here */ |
| 239 | if (!has_extents && (!islnk || has_data_blocks)) { |
Theodore Ts'o | 1e3472c | 1997-04-29 14:53:37 +0000 | [diff] [blame] | 240 | for (i = 0; i < EXT2_N_BLOCKS; i++) |
| 241 | t->i_block[i] = ext2fs_swab32(f->i_block[i]); |
| 242 | } else if (t != f) { |
| 243 | for (i = 0; i < EXT2_N_BLOCKS; i++) |
| 244 | t->i_block[i] = f->i_block[i]; |
| 245 | } |
Theodore Ts'o | e72a9ba | 1999-06-25 15:40:18 +0000 | [diff] [blame] | 246 | t->i_generation = ext2fs_swab32(f->i_generation); |
Theodore Ts'o | 1e3472c | 1997-04-29 14:53:37 +0000 | [diff] [blame] | 247 | t->i_faddr = ext2fs_swab32(f->i_faddr); |
Theodore Ts'o | 50e1e10 | 1997-04-26 13:58:21 +0000 | [diff] [blame] | 248 | |
Theodore Ts'o | 1e3472c | 1997-04-29 14:53:37 +0000 | [diff] [blame] | 249 | switch (fs->super->s_creator_os) { |
| 250 | case EXT2_OS_LINUX: |
Theodore Ts'o | d362a3f | 2007-04-19 01:53:53 -0400 | [diff] [blame] | 251 | t->osd1.linux1.l_i_version = |
| 252 | ext2fs_swab32(f->osd1.linux1.l_i_version); |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 253 | t->osd2.linux2.l_i_blocks_hi = |
Theodore Ts'o | 5d17119 | 2006-11-11 06:32:03 -0500 | [diff] [blame] | 254 | ext2fs_swab16(f->osd2.linux2.l_i_blocks_hi); |
Aneesh Kumar K.V | 2ea504b | 2008-06-04 14:31:23 +0530 | [diff] [blame] | 255 | t->osd2.linux2.l_i_file_acl_high = |
| 256 | ext2fs_swab16(f->osd2.linux2.l_i_file_acl_high); |
Theodore Ts'o | 80e808f | 2000-02-02 16:19:59 +0000 | [diff] [blame] | 257 | t->osd2.linux2.l_i_uid_high = |
| 258 | ext2fs_swab16 (f->osd2.linux2.l_i_uid_high); |
| 259 | t->osd2.linux2.l_i_gid_high = |
| 260 | ext2fs_swab16 (f->osd2.linux2.l_i_gid_high); |
JP Abgrall | e0ed740 | 2014-03-19 19:08:39 -0700 | [diff] [blame] | 261 | t->osd2.linux2.l_i_checksum_lo = |
| 262 | ext2fs_swab16(f->osd2.linux2.l_i_checksum_lo); |
Theodore Ts'o | 1e3472c | 1997-04-29 14:53:37 +0000 | [diff] [blame] | 263 | break; |
| 264 | case EXT2_OS_HURD: |
| 265 | t->osd1.hurd1.h_i_translator = |
| 266 | ext2fs_swab32 (f->osd1.hurd1.h_i_translator); |
| 267 | t->osd2.hurd2.h_i_frag = f->osd2.hurd2.h_i_frag; |
| 268 | t->osd2.hurd2.h_i_fsize = f->osd2.hurd2.h_i_fsize; |
| 269 | t->osd2.hurd2.h_i_mode_high = |
| 270 | ext2fs_swab16 (f->osd2.hurd2.h_i_mode_high); |
| 271 | t->osd2.hurd2.h_i_uid_high = |
| 272 | ext2fs_swab16 (f->osd2.hurd2.h_i_uid_high); |
| 273 | t->osd2.hurd2.h_i_gid_high = |
| 274 | ext2fs_swab16 (f->osd2.hurd2.h_i_gid_high); |
| 275 | t->osd2.hurd2.h_i_author = |
| 276 | ext2fs_swab32 (f->osd2.hurd2.h_i_author); |
| 277 | break; |
Coly Li | c9548bc | 2007-08-23 15:08:30 +0800 | [diff] [blame] | 278 | default: |
Theodore Ts'o | 1e3472c | 1997-04-29 14:53:37 +0000 | [diff] [blame] | 279 | break; |
| 280 | } |
Theodore Ts'o | 7331196 | 2005-01-25 23:42:56 -0500 | [diff] [blame] | 281 | |
| 282 | if (bufsize < (int) (sizeof(struct ext2_inode) + sizeof(__u16))) |
| 283 | return; /* no i_extra_isize field */ |
| 284 | |
Theodore Ts'o | c844010 | 2007-06-22 19:53:21 -0400 | [diff] [blame] | 285 | if (hostorder) |
| 286 | extra_isize = f->i_extra_isize; |
Theodore Ts'o | 7331196 | 2005-01-25 23:42:56 -0500 | [diff] [blame] | 287 | t->i_extra_isize = ext2fs_swab16(f->i_extra_isize); |
Theodore Ts'o | c844010 | 2007-06-22 19:53:21 -0400 | [diff] [blame] | 288 | if (!hostorder) |
| 289 | extra_isize = t->i_extra_isize; |
| 290 | if (extra_isize > EXT2_INODE_SIZE(fs->super) - |
Theodore Ts'o | 7331196 | 2005-01-25 23:42:56 -0500 | [diff] [blame] | 291 | sizeof(struct ext2_inode)) { |
| 292 | /* this is error case: i_extra_size is too large */ |
| 293 | return; |
| 294 | } |
| 295 | |
JP Abgrall | e0ed740 | 2014-03-19 19:08:39 -0700 | [diff] [blame] | 296 | if (extra_isize >= 4) |
| 297 | t->i_checksum_hi = ext2fs_swab16(f->i_checksum_hi); |
| 298 | if (extra_isize >= 8) |
| 299 | t->i_ctime_extra = ext2fs_swab32(f->i_ctime_extra); |
| 300 | if (extra_isize >= 12) |
| 301 | t->i_mtime_extra = ext2fs_swab32(f->i_mtime_extra); |
| 302 | if (extra_isize >= 16) |
| 303 | t->i_atime_extra = ext2fs_swab32(f->i_atime_extra); |
| 304 | if (extra_isize >= 20) |
| 305 | t->i_crtime = ext2fs_swab32(f->i_crtime); |
| 306 | if (extra_isize >= 24) |
| 307 | t->i_crtime_extra = ext2fs_swab32(f->i_crtime_extra); |
| 308 | if (extra_isize >= 28) |
| 309 | t->i_version_hi = ext2fs_swab32(f->i_version_hi); |
| 310 | |
Theodore Ts'o | c844010 | 2007-06-22 19:53:21 -0400 | [diff] [blame] | 311 | i = sizeof(struct ext2_inode) + extra_isize + sizeof(__u32); |
Theodore Ts'o | 7331196 | 2005-01-25 23:42:56 -0500 | [diff] [blame] | 312 | if (bufsize < (int) i) |
| 313 | return; /* no space for EA magic */ |
| 314 | |
| 315 | eaf = (__u32 *) (((char *) f) + sizeof(struct ext2_inode) + |
Theodore Ts'o | c844010 | 2007-06-22 19:53:21 -0400 | [diff] [blame] | 316 | extra_isize); |
Theodore Ts'o | 7331196 | 2005-01-25 23:42:56 -0500 | [diff] [blame] | 317 | |
Eric Sandeen | 82e5418 | 2008-02-29 16:10:21 -0600 | [diff] [blame] | 318 | attr_magic = *eaf; |
| 319 | if (!hostorder) |
| 320 | attr_magic = ext2fs_swab32(attr_magic); |
| 321 | |
| 322 | if (attr_magic != EXT2_EXT_ATTR_MAGIC) |
Theodore Ts'o | 7331196 | 2005-01-25 23:42:56 -0500 | [diff] [blame] | 323 | return; /* it seems no magic here */ |
| 324 | |
| 325 | eat = (__u32 *) (((char *) t) + sizeof(struct ext2_inode) + |
Theodore Ts'o | c844010 | 2007-06-22 19:53:21 -0400 | [diff] [blame] | 326 | extra_isize); |
Theodore Ts'o | 7331196 | 2005-01-25 23:42:56 -0500 | [diff] [blame] | 327 | *eat = ext2fs_swab32(*eaf); |
| 328 | |
| 329 | /* convert EA(s) */ |
| 330 | ext2fs_swap_ext_attr((char *) (eat + 1), (char *) (eaf + 1), |
| 331 | bufsize - sizeof(struct ext2_inode) - |
Theodore Ts'o | c844010 | 2007-06-22 19:53:21 -0400 | [diff] [blame] | 332 | extra_isize - sizeof(__u32), 0); |
Theodore Ts'o | 7331196 | 2005-01-25 23:42:56 -0500 | [diff] [blame] | 333 | |
Theodore Ts'o | 1e3472c | 1997-04-29 14:53:37 +0000 | [diff] [blame] | 334 | } |
Theodore Ts'o | 7331196 | 2005-01-25 23:42:56 -0500 | [diff] [blame] | 335 | |
| 336 | void ext2fs_swap_inode(ext2_filsys fs, struct ext2_inode *t, |
| 337 | struct ext2_inode *f, int hostorder) |
| 338 | { |
| 339 | ext2fs_swap_inode_full(fs, (struct ext2_inode_large *) t, |
| 340 | (struct ext2_inode_large *) f, hostorder, |
| 341 | sizeof(struct ext2_inode)); |
| 342 | } |
| 343 | |
JP Abgrall | e0ed740 | 2014-03-19 19:08:39 -0700 | [diff] [blame] | 344 | void ext2fs_swap_mmp(struct mmp_struct *mmp) |
| 345 | { |
| 346 | mmp->mmp_magic = ext2fs_swab32(mmp->mmp_magic); |
| 347 | mmp->mmp_seq = ext2fs_swab32(mmp->mmp_seq); |
| 348 | mmp->mmp_time = ext2fs_swab64(mmp->mmp_time); |
| 349 | mmp->mmp_check_interval = ext2fs_swab16(mmp->mmp_check_interval); |
| 350 | } |
| 351 | |
Theodore Ts'o | 5df55d7 | 2001-06-11 07:00:04 +0000 | [diff] [blame] | 352 | #endif |