Theodore Ts'o | 50e1e10 | 1997-04-26 13:58:21 +0000 | [diff] [blame] | 1 | /* |
| 2 | * swapfs.c --- swap ext2 filesystem data structures |
| 3 | * |
Theodore Ts'o | 19c78dc | 1997-04-29 16:17:09 +0000 | [diff] [blame] | 4 | * Copyright (C) 1995, 1996 Theodore Ts'o. |
| 5 | * |
| 6 | * %Begin-Header% |
| 7 | * This file may be redistributed under the terms of the GNU Public |
| 8 | * License. |
| 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 | 50e1e10 | 1997-04-26 13:58:21 +0000 | [diff] [blame] | 16 | #include <time.h> |
| 17 | |
Theodore Ts'o | b5abe6f | 1998-01-19 14:47:53 +0000 | [diff] [blame] | 18 | #if EXT2_FLAT_INCLUDES |
| 19 | #include "ext2_fs.h" |
| 20 | #else |
Theodore Ts'o | 50e1e10 | 1997-04-26 13:58:21 +0000 | [diff] [blame] | 21 | #include <linux/ext2_fs.h> |
Theodore Ts'o | b5abe6f | 1998-01-19 14:47:53 +0000 | [diff] [blame] | 22 | #endif |
Theodore Ts'o | 50e1e10 | 1997-04-26 13:58:21 +0000 | [diff] [blame] | 23 | |
| 24 | #include "ext2fs.h" |
| 25 | |
| 26 | void ext2fs_swap_super(struct ext2_super_block * super) |
| 27 | { |
Theodore Ts'o | 1e3472c | 1997-04-29 14:53:37 +0000 | [diff] [blame] | 28 | struct ext2fs_sb *s = (struct ext2fs_sb *) super; |
| 29 | |
Theodore Ts'o | 50e1e10 | 1997-04-26 13:58:21 +0000 | [diff] [blame] | 30 | super->s_inodes_count = ext2fs_swab32(super->s_inodes_count); |
| 31 | super->s_blocks_count = ext2fs_swab32(super->s_blocks_count); |
| 32 | super->s_r_blocks_count = ext2fs_swab32(super->s_r_blocks_count); |
| 33 | super->s_free_blocks_count = ext2fs_swab32(super->s_free_blocks_count); |
| 34 | super->s_free_inodes_count = ext2fs_swab32(super->s_free_inodes_count); |
| 35 | super->s_first_data_block = ext2fs_swab32(super->s_first_data_block); |
| 36 | super->s_log_block_size = ext2fs_swab32(super->s_log_block_size); |
| 37 | super->s_log_frag_size = ext2fs_swab32(super->s_log_frag_size); |
| 38 | super->s_blocks_per_group = ext2fs_swab32(super->s_blocks_per_group); |
| 39 | super->s_frags_per_group = ext2fs_swab32(super->s_frags_per_group); |
| 40 | super->s_inodes_per_group = ext2fs_swab32(super->s_inodes_per_group); |
| 41 | super->s_mtime = ext2fs_swab32(super->s_mtime); |
| 42 | super->s_wtime = ext2fs_swab32(super->s_wtime); |
| 43 | super->s_mnt_count = ext2fs_swab16(super->s_mnt_count); |
| 44 | super->s_max_mnt_count = ext2fs_swab16(super->s_max_mnt_count); |
| 45 | super->s_magic = ext2fs_swab16(super->s_magic); |
| 46 | super->s_state = ext2fs_swab16(super->s_state); |
| 47 | super->s_errors = ext2fs_swab16(super->s_errors); |
Theodore Ts'o | 1e3472c | 1997-04-29 14:53:37 +0000 | [diff] [blame] | 48 | s->s_minor_rev_level = ext2fs_swab16(s->s_minor_rev_level); |
Theodore Ts'o | 50e1e10 | 1997-04-26 13:58:21 +0000 | [diff] [blame] | 49 | super->s_lastcheck = ext2fs_swab32(super->s_lastcheck); |
| 50 | super->s_checkinterval = ext2fs_swab32(super->s_checkinterval); |
| 51 | super->s_creator_os = ext2fs_swab32(super->s_creator_os); |
| 52 | super->s_rev_level = ext2fs_swab32(super->s_rev_level); |
| 53 | #ifdef EXT2_DEF_RESUID |
| 54 | super->s_def_resuid = ext2fs_swab16(super->s_def_resuid); |
| 55 | super->s_def_resgid = ext2fs_swab16(super->s_def_resgid); |
| 56 | #endif |
Theodore Ts'o | 1e3472c | 1997-04-29 14:53:37 +0000 | [diff] [blame] | 57 | s->s_first_ino = ext2fs_swab32(s->s_first_ino); |
| 58 | s->s_inode_size = ext2fs_swab16(s->s_inode_size); |
| 59 | s->s_block_group_nr = ext2fs_swab16(s->s_block_group_nr); |
| 60 | s->s_feature_compat = ext2fs_swab32(s->s_feature_compat); |
| 61 | s->s_feature_incompat = ext2fs_swab32(s->s_feature_incompat); |
| 62 | s->s_feature_ro_compat = ext2fs_swab32(s->s_feature_ro_compat); |
Theodore Ts'o | 2c1a0ce | 2000-02-11 15:39:19 +0000 | [diff] [blame^] | 63 | s->s_algorithm_usage_bitmap = ext2fs_swab32(s->s_algorithm_usage_bitmap); |
Theodore Ts'o | 50e1e10 | 1997-04-26 13:58:21 +0000 | [diff] [blame] | 64 | } |
| 65 | |
| 66 | void ext2fs_swap_group_desc(struct ext2_group_desc *gdp) |
| 67 | { |
| 68 | gdp->bg_block_bitmap = ext2fs_swab32(gdp->bg_block_bitmap); |
| 69 | gdp->bg_inode_bitmap = ext2fs_swab32(gdp->bg_inode_bitmap); |
| 70 | gdp->bg_inode_table = ext2fs_swab32(gdp->bg_inode_table); |
| 71 | gdp->bg_free_blocks_count = ext2fs_swab16(gdp->bg_free_blocks_count); |
| 72 | gdp->bg_free_inodes_count = ext2fs_swab16(gdp->bg_free_inodes_count); |
| 73 | gdp->bg_used_dirs_count = ext2fs_swab16(gdp->bg_used_dirs_count); |
| 74 | } |
| 75 | |
Theodore Ts'o | 1e3472c | 1997-04-29 14:53:37 +0000 | [diff] [blame] | 76 | void ext2fs_swap_inode(ext2_filsys fs, struct ext2_inode *t, |
| 77 | struct ext2_inode *f, int hostorder) |
| 78 | { |
| 79 | unsigned i; |
| 80 | int islnk = 0; |
Theodore Ts'o | 50e1e10 | 1997-04-26 13:58:21 +0000 | [diff] [blame] | 81 | |
Theodore Ts'o | 1e3472c | 1997-04-29 14:53:37 +0000 | [diff] [blame] | 82 | if (hostorder && LINUX_S_ISLNK(f->i_mode)) |
| 83 | islnk = 1; |
| 84 | t->i_mode = ext2fs_swab16(f->i_mode); |
| 85 | if (!hostorder && LINUX_S_ISLNK(t->i_mode)) |
| 86 | islnk = 1; |
| 87 | t->i_uid = ext2fs_swab16(f->i_uid); |
| 88 | t->i_size = ext2fs_swab32(f->i_size); |
| 89 | t->i_atime = ext2fs_swab32(f->i_atime); |
| 90 | t->i_ctime = ext2fs_swab32(f->i_ctime); |
| 91 | t->i_mtime = ext2fs_swab32(f->i_mtime); |
| 92 | t->i_dtime = ext2fs_swab32(f->i_dtime); |
| 93 | t->i_gid = ext2fs_swab16(f->i_gid); |
| 94 | t->i_links_count = ext2fs_swab16(f->i_links_count); |
| 95 | t->i_blocks = ext2fs_swab32(f->i_blocks); |
| 96 | t->i_flags = ext2fs_swab32(f->i_flags); |
| 97 | if (!islnk || f->i_blocks) { |
| 98 | for (i = 0; i < EXT2_N_BLOCKS; i++) |
| 99 | t->i_block[i] = ext2fs_swab32(f->i_block[i]); |
| 100 | } else if (t != f) { |
| 101 | for (i = 0; i < EXT2_N_BLOCKS; i++) |
| 102 | t->i_block[i] = f->i_block[i]; |
| 103 | } |
Theodore Ts'o | e72a9ba | 1999-06-25 15:40:18 +0000 | [diff] [blame] | 104 | t->i_generation = ext2fs_swab32(f->i_generation); |
Theodore Ts'o | 1e3472c | 1997-04-29 14:53:37 +0000 | [diff] [blame] | 105 | t->i_file_acl = ext2fs_swab32(f->i_file_acl); |
| 106 | t->i_dir_acl = ext2fs_swab32(f->i_dir_acl); |
| 107 | t->i_faddr = ext2fs_swab32(f->i_faddr); |
Theodore Ts'o | 50e1e10 | 1997-04-26 13:58:21 +0000 | [diff] [blame] | 108 | |
Theodore Ts'o | 1e3472c | 1997-04-29 14:53:37 +0000 | [diff] [blame] | 109 | switch (fs->super->s_creator_os) { |
| 110 | case EXT2_OS_LINUX: |
Theodore Ts'o | 19c78dc | 1997-04-29 16:17:09 +0000 | [diff] [blame] | 111 | t->osd1.linux1.l_i_reserved1 = |
| 112 | ext2fs_swab32(f->osd1.linux1.l_i_reserved1); |
Theodore Ts'o | 1e3472c | 1997-04-29 14:53:37 +0000 | [diff] [blame] | 113 | t->osd2.linux2.l_i_frag = f->osd2.linux2.l_i_frag; |
| 114 | t->osd2.linux2.l_i_fsize = f->osd2.linux2.l_i_fsize; |
| 115 | t->osd2.linux2.i_pad1 = ext2fs_swab16(f->osd2.linux2.i_pad1); |
Theodore Ts'o | 80e808f | 2000-02-02 16:19:59 +0000 | [diff] [blame] | 116 | t->osd2.linux2.l_i_uid_high = |
| 117 | ext2fs_swab16 (f->osd2.linux2.l_i_uid_high); |
| 118 | t->osd2.linux2.l_i_gid_high = |
| 119 | ext2fs_swab16 (f->osd2.linux2.l_i_gid_high); |
| 120 | t->osd2.linux2.l_i_reserved2 = |
| 121 | ext2fs_swab32(f->osd2.linux2.l_i_reserved2); |
Theodore Ts'o | 1e3472c | 1997-04-29 14:53:37 +0000 | [diff] [blame] | 122 | break; |
| 123 | case EXT2_OS_HURD: |
| 124 | t->osd1.hurd1.h_i_translator = |
| 125 | ext2fs_swab32 (f->osd1.hurd1.h_i_translator); |
| 126 | t->osd2.hurd2.h_i_frag = f->osd2.hurd2.h_i_frag; |
| 127 | t->osd2.hurd2.h_i_fsize = f->osd2.hurd2.h_i_fsize; |
| 128 | t->osd2.hurd2.h_i_mode_high = |
| 129 | ext2fs_swab16 (f->osd2.hurd2.h_i_mode_high); |
| 130 | t->osd2.hurd2.h_i_uid_high = |
| 131 | ext2fs_swab16 (f->osd2.hurd2.h_i_uid_high); |
| 132 | t->osd2.hurd2.h_i_gid_high = |
| 133 | ext2fs_swab16 (f->osd2.hurd2.h_i_gid_high); |
| 134 | t->osd2.hurd2.h_i_author = |
| 135 | ext2fs_swab32 (f->osd2.hurd2.h_i_author); |
| 136 | break; |
| 137 | case EXT2_OS_MASIX: |
Theodore Ts'o | 19c78dc | 1997-04-29 16:17:09 +0000 | [diff] [blame] | 138 | t->osd1.masix1.m_i_reserved1 = |
| 139 | ext2fs_swab32(f->osd1.masix1.m_i_reserved1); |
Theodore Ts'o | 1e3472c | 1997-04-29 14:53:37 +0000 | [diff] [blame] | 140 | t->osd2.masix2.m_i_frag = f->osd2.masix2.m_i_frag; |
| 141 | t->osd2.masix2.m_i_fsize = f->osd2.masix2.m_i_fsize; |
| 142 | t->osd2.masix2.m_pad1 = ext2fs_swab16(f->osd2.masix2.m_pad1); |
Theodore Ts'o | 19c78dc | 1997-04-29 16:17:09 +0000 | [diff] [blame] | 143 | t->osd2.masix2.m_i_reserved2[0] = |
| 144 | ext2fs_swab32(f->osd2.masix2.m_i_reserved2[0]); |
| 145 | t->osd2.masix2.m_i_reserved2[1] = |
| 146 | ext2fs_swab32(f->osd2.masix2.m_i_reserved2[1]); |
Theodore Ts'o | 1e3472c | 1997-04-29 14:53:37 +0000 | [diff] [blame] | 147 | break; |
| 148 | } |
| 149 | } |
| 150 | |