mirror of https://github.com/vitalif/e2fsprogs
143 lines
5.3 KiB
C
143 lines
5.3 KiB
C
/*
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* swapfs.c --- swap ext2 filesystem data structures
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*
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* Copyright (C) 1995, 1996 Theodore Ts'o.
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*
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* %Begin-Header%
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* This file may be redistributed under the terms of the GNU Public
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* License.
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* %End-Header%
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*/
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#include <stdio.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <time.h>
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#include <linux/ext2_fs.h>
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#include "ext2fs.h"
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void ext2fs_swap_super(struct ext2_super_block * super)
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{
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struct ext2fs_sb *s = (struct ext2fs_sb *) super;
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super->s_inodes_count = ext2fs_swab32(super->s_inodes_count);
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super->s_blocks_count = ext2fs_swab32(super->s_blocks_count);
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super->s_r_blocks_count = ext2fs_swab32(super->s_r_blocks_count);
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super->s_free_blocks_count = ext2fs_swab32(super->s_free_blocks_count);
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super->s_free_inodes_count = ext2fs_swab32(super->s_free_inodes_count);
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super->s_first_data_block = ext2fs_swab32(super->s_first_data_block);
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super->s_log_block_size = ext2fs_swab32(super->s_log_block_size);
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super->s_log_frag_size = ext2fs_swab32(super->s_log_frag_size);
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super->s_blocks_per_group = ext2fs_swab32(super->s_blocks_per_group);
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super->s_frags_per_group = ext2fs_swab32(super->s_frags_per_group);
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super->s_inodes_per_group = ext2fs_swab32(super->s_inodes_per_group);
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super->s_mtime = ext2fs_swab32(super->s_mtime);
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super->s_wtime = ext2fs_swab32(super->s_wtime);
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super->s_mnt_count = ext2fs_swab16(super->s_mnt_count);
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super->s_max_mnt_count = ext2fs_swab16(super->s_max_mnt_count);
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super->s_magic = ext2fs_swab16(super->s_magic);
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super->s_state = ext2fs_swab16(super->s_state);
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super->s_errors = ext2fs_swab16(super->s_errors);
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s->s_minor_rev_level = ext2fs_swab16(s->s_minor_rev_level);
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super->s_lastcheck = ext2fs_swab32(super->s_lastcheck);
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super->s_checkinterval = ext2fs_swab32(super->s_checkinterval);
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super->s_creator_os = ext2fs_swab32(super->s_creator_os);
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super->s_rev_level = ext2fs_swab32(super->s_rev_level);
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#ifdef EXT2_DEF_RESUID
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super->s_def_resuid = ext2fs_swab16(super->s_def_resuid);
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super->s_def_resgid = ext2fs_swab16(super->s_def_resgid);
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#endif
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s->s_first_ino = ext2fs_swab32(s->s_first_ino);
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s->s_inode_size = ext2fs_swab16(s->s_inode_size);
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s->s_block_group_nr = ext2fs_swab16(s->s_block_group_nr);
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s->s_feature_compat = ext2fs_swab32(s->s_feature_compat);
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s->s_feature_incompat = ext2fs_swab32(s->s_feature_incompat);
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s->s_feature_ro_compat = ext2fs_swab32(s->s_feature_ro_compat);
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}
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void ext2fs_swap_group_desc(struct ext2_group_desc *gdp)
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{
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gdp->bg_block_bitmap = ext2fs_swab32(gdp->bg_block_bitmap);
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gdp->bg_inode_bitmap = ext2fs_swab32(gdp->bg_inode_bitmap);
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gdp->bg_inode_table = ext2fs_swab32(gdp->bg_inode_table);
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gdp->bg_free_blocks_count = ext2fs_swab16(gdp->bg_free_blocks_count);
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gdp->bg_free_inodes_count = ext2fs_swab16(gdp->bg_free_inodes_count);
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gdp->bg_used_dirs_count = ext2fs_swab16(gdp->bg_used_dirs_count);
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}
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void ext2fs_swap_inode(ext2_filsys fs, struct ext2_inode *t,
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struct ext2_inode *f, int hostorder)
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{
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unsigned i;
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int islnk = 0;
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if (hostorder && LINUX_S_ISLNK(f->i_mode))
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islnk = 1;
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t->i_mode = ext2fs_swab16(f->i_mode);
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if (!hostorder && LINUX_S_ISLNK(t->i_mode))
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islnk = 1;
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t->i_uid = ext2fs_swab16(f->i_uid);
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t->i_size = ext2fs_swab32(f->i_size);
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t->i_atime = ext2fs_swab32(f->i_atime);
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t->i_ctime = ext2fs_swab32(f->i_ctime);
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t->i_mtime = ext2fs_swab32(f->i_mtime);
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t->i_dtime = ext2fs_swab32(f->i_dtime);
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t->i_gid = ext2fs_swab16(f->i_gid);
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t->i_links_count = ext2fs_swab16(f->i_links_count);
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t->i_blocks = ext2fs_swab32(f->i_blocks);
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t->i_flags = ext2fs_swab32(f->i_flags);
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if (!islnk || f->i_blocks) {
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for (i = 0; i < EXT2_N_BLOCKS; i++)
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t->i_block[i] = ext2fs_swab32(f->i_block[i]);
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} else if (t != f) {
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for (i = 0; i < EXT2_N_BLOCKS; i++)
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t->i_block[i] = f->i_block[i];
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}
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t->i_version = ext2fs_swab32(f->i_version);
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t->i_file_acl = ext2fs_swab32(f->i_file_acl);
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t->i_dir_acl = ext2fs_swab32(f->i_dir_acl);
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t->i_faddr = ext2fs_swab32(f->i_faddr);
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switch (fs->super->s_creator_os) {
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case EXT2_OS_LINUX:
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t->osd1.linux1.l_i_reserved1 =
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ext2fs_swab32(f->osd1.linux1.l_i_reserved1);
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t->osd2.linux2.l_i_frag = f->osd2.linux2.l_i_frag;
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t->osd2.linux2.l_i_fsize = f->osd2.linux2.l_i_fsize;
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t->osd2.linux2.i_pad1 = ext2fs_swab16(f->osd2.linux2.i_pad1);
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t->osd2.linux2.l_i_reserved2[0] =
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ext2fs_swab32(f->osd2.linux2.l_i_reserved2[0]);
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t->osd2.linux2.l_i_reserved2[1] =
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ext2fs_swab32(f->osd2.linux2.l_i_reserved2[1]);
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break;
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case EXT2_OS_HURD:
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t->osd1.hurd1.h_i_translator =
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ext2fs_swab32 (f->osd1.hurd1.h_i_translator);
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t->osd2.hurd2.h_i_frag = f->osd2.hurd2.h_i_frag;
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t->osd2.hurd2.h_i_fsize = f->osd2.hurd2.h_i_fsize;
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t->osd2.hurd2.h_i_mode_high =
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ext2fs_swab16 (f->osd2.hurd2.h_i_mode_high);
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t->osd2.hurd2.h_i_uid_high =
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ext2fs_swab16 (f->osd2.hurd2.h_i_uid_high);
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t->osd2.hurd2.h_i_gid_high =
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ext2fs_swab16 (f->osd2.hurd2.h_i_gid_high);
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t->osd2.hurd2.h_i_author =
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ext2fs_swab32 (f->osd2.hurd2.h_i_author);
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break;
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case EXT2_OS_MASIX:
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t->osd1.masix1.m_i_reserved1 =
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ext2fs_swab32(f->osd1.masix1.m_i_reserved1);
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t->osd2.masix2.m_i_frag = f->osd2.masix2.m_i_frag;
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t->osd2.masix2.m_i_fsize = f->osd2.masix2.m_i_fsize;
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t->osd2.masix2.m_pad1 = ext2fs_swab16(f->osd2.masix2.m_pad1);
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t->osd2.masix2.m_i_reserved2[0] =
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ext2fs_swab32(f->osd2.masix2.m_i_reserved2[0]);
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t->osd2.masix2.m_i_reserved2[1] =
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ext2fs_swab32(f->osd2.masix2.m_i_reserved2[1]);
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break;
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}
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}
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