lib/ext2fs/swapfs.c - platform/external/e2fsprogs - Git at Google

 /*
  * swapfs.c --- swap ext2 filesystem data structures
  *
  * Copyright (C) 1995, 1996, 2002 Theodore Ts'o.
  *
  * %Begin-Header%
  * This file may be redistributed under the terms of the GNU Library
  * General Public License, version 2.
  * %End-Header%
  */

 #include <stdio.h>
 #if HAVE_UNISTD_H
 #include <unistd.h>
 #endif
 #include <string.h>
 #include <time.h>

 #include "ext2_fs.h"
 #include "ext2fs.h"
 #include <ext2fs/ext2_ext_attr.h>

 #ifdef WORDS_BIGENDIAN
 void ext2fs_swap_super(struct ext2_super_block * sb)
 {
   	int i;
 	sb->s_inodes_count = ext2fs_swab32(sb->s_inodes_count);
 	sb->s_blocks_count = ext2fs_swab32(sb->s_blocks_count);
 	sb->s_r_blocks_count = ext2fs_swab32(sb->s_r_blocks_count);
 	sb->s_free_blocks_count = ext2fs_swab32(sb->s_free_blocks_count);
 	sb->s_free_inodes_count = ext2fs_swab32(sb->s_free_inodes_count);
 	sb->s_first_data_block = ext2fs_swab32(sb->s_first_data_block);
 	sb->s_log_block_size = ext2fs_swab32(sb->s_log_block_size);
 	sb->s_log_frag_size = ext2fs_swab32(sb->s_log_frag_size);
 	sb->s_blocks_per_group = ext2fs_swab32(sb->s_blocks_per_group);
 	sb->s_frags_per_group = ext2fs_swab32(sb->s_frags_per_group);
 	sb->s_inodes_per_group = ext2fs_swab32(sb->s_inodes_per_group);
 	sb->s_mtime = ext2fs_swab32(sb->s_mtime);
 	sb->s_wtime = ext2fs_swab32(sb->s_wtime);
 	sb->s_mnt_count = ext2fs_swab16(sb->s_mnt_count);
 	sb->s_max_mnt_count = ext2fs_swab16(sb->s_max_mnt_count);
 	sb->s_magic = ext2fs_swab16(sb->s_magic);
 	sb->s_state = ext2fs_swab16(sb->s_state);
 	sb->s_errors = ext2fs_swab16(sb->s_errors);
 	sb->s_minor_rev_level = ext2fs_swab16(sb->s_minor_rev_level);
 	sb->s_lastcheck = ext2fs_swab32(sb->s_lastcheck);
 	sb->s_checkinterval = ext2fs_swab32(sb->s_checkinterval);
 	sb->s_creator_os = ext2fs_swab32(sb->s_creator_os);
 	sb->s_rev_level = ext2fs_swab32(sb->s_rev_level);
 	sb->s_def_resuid = ext2fs_swab16(sb->s_def_resuid);
 	sb->s_def_resgid = ext2fs_swab16(sb->s_def_resgid);
 	sb->s_first_ino = ext2fs_swab32(sb->s_first_ino);
 	sb->s_inode_size = ext2fs_swab16(sb->s_inode_size);
 	sb->s_block_group_nr = ext2fs_swab16(sb->s_block_group_nr);
 	sb->s_feature_compat = ext2fs_swab32(sb->s_feature_compat);
 	sb->s_feature_incompat = ext2fs_swab32(sb->s_feature_incompat);
 	sb->s_feature_ro_compat = ext2fs_swab32(sb->s_feature_ro_compat);
 	sb->s_algorithm_usage_bitmap = ext2fs_swab32(sb->s_algorithm_usage_bitmap);
 	sb->s_reserved_gdt_blocks = ext2fs_swab16(sb->s_reserved_gdt_blocks);
 	sb->s_journal_inum = ext2fs_swab32(sb->s_journal_inum);
 	sb->s_journal_dev = ext2fs_swab32(sb->s_journal_dev);
 	sb->s_last_orphan = ext2fs_swab32(sb->s_last_orphan);
 	sb->s_desc_size = ext2fs_swab16(sb->s_desc_size);
 	sb->s_default_mount_opts = ext2fs_swab32(sb->s_default_mount_opts);
 	sb->s_first_meta_bg = ext2fs_swab32(sb->s_first_meta_bg);
 	sb->s_mkfs_time = ext2fs_swab32(sb->s_mkfs_time);
 	sb->s_blocks_count_hi = ext2fs_swab32(sb->s_blocks_count_hi);
 	sb->s_r_blocks_count_hi = ext2fs_swab32(sb->s_r_blocks_count_hi);
 	sb->s_free_blocks_hi = ext2fs_swab32(sb->s_free_blocks_hi);
 	sb->s_min_extra_isize = ext2fs_swab16(sb->s_min_extra_isize);
 	sb->s_want_extra_isize = ext2fs_swab16(sb->s_want_extra_isize);
 	sb->s_flags = ext2fs_swab32(sb->s_flags);
 	sb->s_kbytes_written = ext2fs_swab64(sb->s_kbytes_written);
 	sb->s_snapshot_inum = ext2fs_swab32(sb->s_snapshot_inum);
 	sb->s_snapshot_id = ext2fs_swab32(sb->s_snapshot_id);
 	sb->s_snapshot_r_blocks_count =
 		ext2fs_swab64(sb->s_snapshot_r_blocks_count);
 	sb->s_snapshot_list = ext2fs_swab32(sb->s_snapshot_list);

 	for (i=0; i < 4; i++)
 		sb->s_hash_seed[i] = ext2fs_swab32(sb->s_hash_seed[i]);

 	/* if journal backup is for a valid extent-based journal... */
 	if (!ext2fs_extent_header_verify(sb->s_jnl_blocks,
 					 sizeof(sb->s_jnl_blocks))) {
 		/* ... swap only the journal i_size */
 		sb->s_jnl_blocks[16] = ext2fs_swab32(sb->s_jnl_blocks[16]);
 		/* and the extent data is not swapped on read */
 		return;
 	}

 	/* direct/indirect journal: swap it all */
 	for (i=0; i < 17; i++)
 		sb->s_jnl_blocks[i] = ext2fs_swab32(sb->s_jnl_blocks[i]);
 }

 void ext2fs_swap_group_desc(struct ext2_group_desc *gdp)
 {
 	gdp->bg_block_bitmap = ext2fs_swab32(gdp->bg_block_bitmap);
 	gdp->bg_inode_bitmap = ext2fs_swab32(gdp->bg_inode_bitmap);
 	gdp->bg_inode_table = ext2fs_swab32(gdp->bg_inode_table);
 	gdp->bg_free_blocks_count = ext2fs_swab16(gdp->bg_free_blocks_count);
 	gdp->bg_free_inodes_count = ext2fs_swab16(gdp->bg_free_inodes_count);
 	gdp->bg_used_dirs_count = ext2fs_swab16(gdp->bg_used_dirs_count);
 	gdp->bg_flags = ext2fs_swab16(gdp->bg_flags);
 	gdp->bg_itable_unused = ext2fs_swab16(gdp->bg_itable_unused);
 	gdp->bg_checksum = ext2fs_swab16(gdp->bg_checksum);
 }

 void ext2fs_swap_ext_attr_header(struct ext2_ext_attr_header *to_header,
 				 struct ext2_ext_attr_header *from_header)
 {
 	int n;

 	to_header->h_magic    = ext2fs_swab32(from_header->h_magic);
 	to_header->h_blocks   = ext2fs_swab32(from_header->h_blocks);
 	to_header->h_refcount = ext2fs_swab32(from_header->h_refcount);
 	to_header->h_hash     = ext2fs_swab32(from_header->h_hash);
 	for (n = 0; n < 4; n++)
 		to_header->h_reserved[n] =
 			ext2fs_swab32(from_header->h_reserved[n]);
 }

 void ext2fs_swap_ext_attr_entry(struct ext2_ext_attr_entry *to_entry,
 				struct ext2_ext_attr_entry *from_entry)
 {
 	to_entry->e_value_offs  = ext2fs_swab16(from_entry->e_value_offs);
 	to_entry->e_value_block = ext2fs_swab32(from_entry->e_value_block);
 	to_entry->e_value_size  = ext2fs_swab32(from_entry->e_value_size);
 	to_entry->e_hash	= ext2fs_swab32(from_entry->e_hash);
 }

 void ext2fs_swap_ext_attr(char *to, char *from, int bufsize, int has_header)
 {
 	struct ext2_ext_attr_header *from_header =
 		(struct ext2_ext_attr_header *)from;
 	struct ext2_ext_attr_header *to_header =
 		(struct ext2_ext_attr_header *)to;
 	struct ext2_ext_attr_entry *from_entry, *to_entry;
 	char *from_end = (char *)from_header + bufsize;

 	if (to_header != from_header)
 		memcpy(to_header, from_header, bufsize);

 	if (has_header) {
 		ext2fs_swap_ext_attr_header(to_header, from_header);

 		from_entry = (struct ext2_ext_attr_entry *)(from_header+1);
 		to_entry   = (struct ext2_ext_attr_entry *)(to_header+1);
 	} else {
 		from_entry = (struct ext2_ext_attr_entry *)from_header;
 		to_entry   = (struct ext2_ext_attr_entry *)to_header;
 	}

 	while ((char *)from_entry < from_end && *(__u32 *)from_entry) {
 		ext2fs_swap_ext_attr_entry(to_entry, from_entry);
 		from_entry = EXT2_EXT_ATTR_NEXT(from_entry);
 		to_entry   = EXT2_EXT_ATTR_NEXT(to_entry);
 	}
 }

 void ext2fs_swap_inode_full(ext2_filsys fs, struct ext2_inode_large *t,
 			    struct ext2_inode_large *f, int hostorder,
 			    int bufsize)
 {
 	unsigned i, has_data_blocks, extra_isize, attr_magic;
 	int has_extents = 0;
 	int islnk = 0;
 	__u32 *eaf, *eat;

 	if (hostorder && LINUX_S_ISLNK(f->i_mode))
 		islnk = 1;
 	t->i_mode = ext2fs_swab16(f->i_mode);
 	if (!hostorder && LINUX_S_ISLNK(t->i_mode))
 		islnk = 1;
 	t->i_uid = ext2fs_swab16(f->i_uid);
 	t->i_size = ext2fs_swab32(f->i_size);
 	t->i_atime = ext2fs_swab32(f->i_atime);
 	t->i_ctime = ext2fs_swab32(f->i_ctime);
 	t->i_mtime = ext2fs_swab32(f->i_mtime);
 	t->i_dtime = ext2fs_swab32(f->i_dtime);
 	t->i_gid = ext2fs_swab16(f->i_gid);
 	t->i_links_count = ext2fs_swab16(f->i_links_count);
 	t->i_file_acl = ext2fs_swab32(f->i_file_acl);
 	if (hostorder)
 		has_data_blocks = ext2fs_inode_data_blocks(fs,
 					   (struct ext2_inode *) f);
 	t->i_blocks = ext2fs_swab32(f->i_blocks);
 	if (!hostorder)
 		has_data_blocks = ext2fs_inode_data_blocks(fs,
 					   (struct ext2_inode *) t);
 	if (hostorder && (f->i_flags & EXT4_EXTENTS_FL))
 		has_extents = 1;
 	t->i_flags = ext2fs_swab32(f->i_flags);
 	if (!hostorder && (t->i_flags & EXT4_EXTENTS_FL))
 		has_extents = 1;
 	t->i_dir_acl = ext2fs_swab32(f->i_dir_acl);
 	/* extent data are swapped on access, not here */
 	if (!has_extents && (!islnk || has_data_blocks)) {
 		for (i = 0; i < EXT2_N_BLOCKS; i++)
 			t->i_block[i] = ext2fs_swab32(f->i_block[i]);
 	} else if (t != f) {
 		for (i = 0; i < EXT2_N_BLOCKS; i++)
 			t->i_block[i] = f->i_block[i];
 	}
 	t->i_generation = ext2fs_swab32(f->i_generation);
 	t->i_faddr = ext2fs_swab32(f->i_faddr);

 	switch (fs->super->s_creator_os) {
 	case EXT2_OS_LINUX:
 		t->osd1.linux1.l_i_version =
 			ext2fs_swab32(f->osd1.linux1.l_i_version);
 		t->osd2.linux2.l_i_blocks_hi =
 			ext2fs_swab16(f->osd2.linux2.l_i_blocks_hi);
 		t->osd2.linux2.l_i_file_acl_high =
 			ext2fs_swab16(f->osd2.linux2.l_i_file_acl_high);
 		t->osd2.linux2.l_i_uid_high =
 		  ext2fs_swab16 (f->osd2.linux2.l_i_uid_high);
 		t->osd2.linux2.l_i_gid_high =
 		  ext2fs_swab16 (f->osd2.linux2.l_i_gid_high);
 		t->osd2.linux2.l_i_reserved2 =
 			ext2fs_swab32(f->osd2.linux2.l_i_reserved2);
 		break;
 	case EXT2_OS_HURD:
 		t->osd1.hurd1.h_i_translator =
 		  ext2fs_swab32 (f->osd1.hurd1.h_i_translator);
 		t->osd2.hurd2.h_i_frag = f->osd2.hurd2.h_i_frag;
 		t->osd2.hurd2.h_i_fsize = f->osd2.hurd2.h_i_fsize;
 		t->osd2.hurd2.h_i_mode_high =
 		  ext2fs_swab16 (f->osd2.hurd2.h_i_mode_high);
 		t->osd2.hurd2.h_i_uid_high =
 		  ext2fs_swab16 (f->osd2.hurd2.h_i_uid_high);
 		t->osd2.hurd2.h_i_gid_high =
 		  ext2fs_swab16 (f->osd2.hurd2.h_i_gid_high);
 		t->osd2.hurd2.h_i_author =
 		  ext2fs_swab32 (f->osd2.hurd2.h_i_author);
 		break;
 	default:
 		break;
 	}

 	if (bufsize < (int) (sizeof(struct ext2_inode) + sizeof(__u16)))
 		return; /* no i_extra_isize field */

 	if (hostorder)
 		extra_isize = f->i_extra_isize;
 	t->i_extra_isize = ext2fs_swab16(f->i_extra_isize);
 	if (!hostorder)
 		extra_isize = t->i_extra_isize;
 	if (extra_isize > EXT2_INODE_SIZE(fs->super) -
 				sizeof(struct ext2_inode)) {
 		/* this is error case: i_extra_size is too large */
 		return;
 	}

 	i = sizeof(struct ext2_inode) + extra_isize + sizeof(__u32);
 	if (bufsize < (int) i)
 		return; /* no space for EA magic */

 	eaf = (__u32 *) (((char *) f) + sizeof(struct ext2_inode) +
 					extra_isize);

 	attr_magic = *eaf;
 	if (!hostorder)
 		attr_magic = ext2fs_swab32(attr_magic);

 	if (attr_magic != EXT2_EXT_ATTR_MAGIC)
 		return; /* it seems no magic here */

 	eat = (__u32 *) (((char *) t) + sizeof(struct ext2_inode) +
 					extra_isize);
 	*eat = ext2fs_swab32(*eaf);

 	/* convert EA(s) */
 	ext2fs_swap_ext_attr((char *) (eat + 1), (char *) (eaf + 1),
 			     bufsize - sizeof(struct ext2_inode) -
 			     extra_isize - sizeof(__u32), 0);

 }

 void ext2fs_swap_inode(ext2_filsys fs, struct ext2_inode *t,
 		       struct ext2_inode *f, int hostorder)
 {
 	ext2fs_swap_inode_full(fs, (struct ext2_inode_large *) t,
 				(struct ext2_inode_large *) f, hostorder,
 				sizeof(struct ext2_inode));
 }

 #endif
	/*
	* swapfs.c --- swap ext2 filesystem data structures
	*
	* Copyright (C) 1995, 1996, 2002 Theodore Ts'o.
	*
	* %Begin-Header%
	* This file may be redistributed under the terms of the GNU Library
	* General Public License, version 2.
	* %End-Header%
	*/

	#include <stdio.h>
	#if HAVE_UNISTD_H
	#include <unistd.h>
	#endif
	#include <string.h>
	#include <time.h>

	#include "ext2_fs.h"
	#include "ext2fs.h"
	#include <ext2fs/ext2_ext_attr.h>

	#ifdef WORDS_BIGENDIAN
	void ext2fs_swap_super(struct ext2_super_block * sb)
	{
	int i;
	sb->s_inodes_count = ext2fs_swab32(sb->s_inodes_count);
	sb->s_blocks_count = ext2fs_swab32(sb->s_blocks_count);
	sb->s_r_blocks_count = ext2fs_swab32(sb->s_r_blocks_count);
	sb->s_free_blocks_count = ext2fs_swab32(sb->s_free_blocks_count);
	sb->s_free_inodes_count = ext2fs_swab32(sb->s_free_inodes_count);
	sb->s_first_data_block = ext2fs_swab32(sb->s_first_data_block);
	sb->s_log_block_size = ext2fs_swab32(sb->s_log_block_size);
	sb->s_log_frag_size = ext2fs_swab32(sb->s_log_frag_size);
	sb->s_blocks_per_group = ext2fs_swab32(sb->s_blocks_per_group);
	sb->s_frags_per_group = ext2fs_swab32(sb->s_frags_per_group);
	sb->s_inodes_per_group = ext2fs_swab32(sb->s_inodes_per_group);
	sb->s_mtime = ext2fs_swab32(sb->s_mtime);
	sb->s_wtime = ext2fs_swab32(sb->s_wtime);
	sb->s_mnt_count = ext2fs_swab16(sb->s_mnt_count);
	sb->s_max_mnt_count = ext2fs_swab16(sb->s_max_mnt_count);
	sb->s_magic = ext2fs_swab16(sb->s_magic);
	sb->s_state = ext2fs_swab16(sb->s_state);
	sb->s_errors = ext2fs_swab16(sb->s_errors);
	sb->s_minor_rev_level = ext2fs_swab16(sb->s_minor_rev_level);
	sb->s_lastcheck = ext2fs_swab32(sb->s_lastcheck);
	sb->s_checkinterval = ext2fs_swab32(sb->s_checkinterval);
	sb->s_creator_os = ext2fs_swab32(sb->s_creator_os);
	sb->s_rev_level = ext2fs_swab32(sb->s_rev_level);
	sb->s_def_resuid = ext2fs_swab16(sb->s_def_resuid);
	sb->s_def_resgid = ext2fs_swab16(sb->s_def_resgid);
	sb->s_first_ino = ext2fs_swab32(sb->s_first_ino);
	sb->s_inode_size = ext2fs_swab16(sb->s_inode_size);
	sb->s_block_group_nr = ext2fs_swab16(sb->s_block_group_nr);
	sb->s_feature_compat = ext2fs_swab32(sb->s_feature_compat);
	sb->s_feature_incompat = ext2fs_swab32(sb->s_feature_incompat);
	sb->s_feature_ro_compat = ext2fs_swab32(sb->s_feature_ro_compat);
	sb->s_algorithm_usage_bitmap = ext2fs_swab32(sb->s_algorithm_usage_bitmap);
	sb->s_reserved_gdt_blocks = ext2fs_swab16(sb->s_reserved_gdt_blocks);
	sb->s_journal_inum = ext2fs_swab32(sb->s_journal_inum);
	sb->s_journal_dev = ext2fs_swab32(sb->s_journal_dev);
	sb->s_last_orphan = ext2fs_swab32(sb->s_last_orphan);
	sb->s_desc_size = ext2fs_swab16(sb->s_desc_size);
	sb->s_default_mount_opts = ext2fs_swab32(sb->s_default_mount_opts);
	sb->s_first_meta_bg = ext2fs_swab32(sb->s_first_meta_bg);
	sb->s_mkfs_time = ext2fs_swab32(sb->s_mkfs_time);
	sb->s_blocks_count_hi = ext2fs_swab32(sb->s_blocks_count_hi);
	sb->s_r_blocks_count_hi = ext2fs_swab32(sb->s_r_blocks_count_hi);
	sb->s_free_blocks_hi = ext2fs_swab32(sb->s_free_blocks_hi);
	sb->s_min_extra_isize = ext2fs_swab16(sb->s_min_extra_isize);
	sb->s_want_extra_isize = ext2fs_swab16(sb->s_want_extra_isize);
	sb->s_flags = ext2fs_swab32(sb->s_flags);
	sb->s_kbytes_written = ext2fs_swab64(sb->s_kbytes_written);
	sb->s_snapshot_inum = ext2fs_swab32(sb->s_snapshot_inum);
	sb->s_snapshot_id = ext2fs_swab32(sb->s_snapshot_id);
	sb->s_snapshot_r_blocks_count =
	ext2fs_swab64(sb->s_snapshot_r_blocks_count);
	sb->s_snapshot_list = ext2fs_swab32(sb->s_snapshot_list);

	for (i=0; i < 4; i++)
	sb->s_hash_seed[i] = ext2fs_swab32(sb->s_hash_seed[i]);

	/* if journal backup is for a valid extent-based journal... */
	if (!ext2fs_extent_header_verify(sb->s_jnl_blocks,
	sizeof(sb->s_jnl_blocks))) {
	/* ... swap only the journal i_size */
	sb->s_jnl_blocks[16] = ext2fs_swab32(sb->s_jnl_blocks[16]);
	/* and the extent data is not swapped on read */
	return;
	}

	/* direct/indirect journal: swap it all */
	for (i=0; i < 17; i++)
	sb->s_jnl_blocks[i] = ext2fs_swab32(sb->s_jnl_blocks[i]);
	}

	void ext2fs_swap_group_desc(struct ext2_group_desc *gdp)
	{
	gdp->bg_block_bitmap = ext2fs_swab32(gdp->bg_block_bitmap);
	gdp->bg_inode_bitmap = ext2fs_swab32(gdp->bg_inode_bitmap);
	gdp->bg_inode_table = ext2fs_swab32(gdp->bg_inode_table);
	gdp->bg_free_blocks_count = ext2fs_swab16(gdp->bg_free_blocks_count);
	gdp->bg_free_inodes_count = ext2fs_swab16(gdp->bg_free_inodes_count);
	gdp->bg_used_dirs_count = ext2fs_swab16(gdp->bg_used_dirs_count);
	gdp->bg_flags = ext2fs_swab16(gdp->bg_flags);
	gdp->bg_itable_unused = ext2fs_swab16(gdp->bg_itable_unused);
	gdp->bg_checksum = ext2fs_swab16(gdp->bg_checksum);
	}

	void ext2fs_swap_ext_attr_header(struct ext2_ext_attr_header *to_header,
	struct ext2_ext_attr_header *from_header)
	{
	int n;

	to_header->h_magic = ext2fs_swab32(from_header->h_magic);
	to_header->h_blocks = ext2fs_swab32(from_header->h_blocks);
	to_header->h_refcount = ext2fs_swab32(from_header->h_refcount);
	to_header->h_hash = ext2fs_swab32(from_header->h_hash);
	for (n = 0; n < 4; n++)
	to_header->h_reserved[n] =
	ext2fs_swab32(from_header->h_reserved[n]);
	}

	void ext2fs_swap_ext_attr_entry(struct ext2_ext_attr_entry *to_entry,
	struct ext2_ext_attr_entry *from_entry)
	{
	to_entry->e_value_offs = ext2fs_swab16(from_entry->e_value_offs);
	to_entry->e_value_block = ext2fs_swab32(from_entry->e_value_block);
	to_entry->e_value_size = ext2fs_swab32(from_entry->e_value_size);
	to_entry->e_hash = ext2fs_swab32(from_entry->e_hash);
	}

	void ext2fs_swap_ext_attr(char to, char from, int bufsize, int has_header)
	{
	struct ext2_ext_attr_header *from_header =
	(struct ext2_ext_attr_header *)from;
	struct ext2_ext_attr_header *to_header =
	(struct ext2_ext_attr_header *)to;
	struct ext2_ext_attr_entry from_entry, to_entry;
	char from_end = (char )from_header + bufsize;

	if (to_header != from_header)
	memcpy(to_header, from_header, bufsize);

	if (has_header) {
	ext2fs_swap_ext_attr_header(to_header, from_header);

	from_entry = (struct ext2_ext_attr_entry *)(from_header+1);
	to_entry = (struct ext2_ext_attr_entry *)(to_header+1);
	} else {
	from_entry = (struct ext2_ext_attr_entry *)from_header;
	to_entry = (struct ext2_ext_attr_entry *)to_header;
	}

	while ((char )from_entry < from_end && (__u32 *)from_entry) {
	ext2fs_swap_ext_attr_entry(to_entry, from_entry);
	from_entry = EXT2_EXT_ATTR_NEXT(from_entry);
	to_entry = EXT2_EXT_ATTR_NEXT(to_entry);
	}
	}

	void ext2fs_swap_inode_full(ext2_filsys fs, struct ext2_inode_large *t,
	struct ext2_inode_large *f, int hostorder,
	int bufsize)
	{
	unsigned i, has_data_blocks, extra_isize, attr_magic;
	int has_extents = 0;
	int islnk = 0;
	__u32 eaf, eat;

	if (hostorder && LINUX_S_ISLNK(f->i_mode))
	islnk = 1;
	t->i_mode = ext2fs_swab16(f->i_mode);
	if (!hostorder && LINUX_S_ISLNK(t->i_mode))
	islnk = 1;
	t->i_uid = ext2fs_swab16(f->i_uid);
	t->i_size = ext2fs_swab32(f->i_size);
	t->i_atime = ext2fs_swab32(f->i_atime);
	t->i_ctime = ext2fs_swab32(f->i_ctime);
	t->i_mtime = ext2fs_swab32(f->i_mtime);
	t->i_dtime = ext2fs_swab32(f->i_dtime);
	t->i_gid = ext2fs_swab16(f->i_gid);
	t->i_links_count = ext2fs_swab16(f->i_links_count);
	t->i_file_acl = ext2fs_swab32(f->i_file_acl);
	if (hostorder)
	has_data_blocks = ext2fs_inode_data_blocks(fs,
	(struct ext2_inode *) f);
	t->i_blocks = ext2fs_swab32(f->i_blocks);
	if (!hostorder)
	has_data_blocks = ext2fs_inode_data_blocks(fs,
	(struct ext2_inode *) t);
	if (hostorder && (f->i_flags & EXT4_EXTENTS_FL))
	has_extents = 1;
	t->i_flags = ext2fs_swab32(f->i_flags);
	if (!hostorder && (t->i_flags & EXT4_EXTENTS_FL))
	has_extents = 1;
	t->i_dir_acl = ext2fs_swab32(f->i_dir_acl);
	/* extent data are swapped on access, not here */
	if (!has_extents && (!islnk \|\| has_data_blocks)) {
	for (i = 0; i < EXT2_N_BLOCKS; i++)
	t->i_block[i] = ext2fs_swab32(f->i_block[i]);
	} else if (t != f) {
	for (i = 0; i < EXT2_N_BLOCKS; i++)
	t->i_block[i] = f->i_block[i];
	}
	t->i_generation = ext2fs_swab32(f->i_generation);
	t->i_faddr = ext2fs_swab32(f->i_faddr);

	switch (fs->super->s_creator_os) {
	case EXT2_OS_LINUX:
	t->osd1.linux1.l_i_version =
	ext2fs_swab32(f->osd1.linux1.l_i_version);
	t->osd2.linux2.l_i_blocks_hi =
	ext2fs_swab16(f->osd2.linux2.l_i_blocks_hi);
	t->osd2.linux2.l_i_file_acl_high =
	ext2fs_swab16(f->osd2.linux2.l_i_file_acl_high);
	t->osd2.linux2.l_i_uid_high =
	ext2fs_swab16 (f->osd2.linux2.l_i_uid_high);
	t->osd2.linux2.l_i_gid_high =
	ext2fs_swab16 (f->osd2.linux2.l_i_gid_high);
	t->osd2.linux2.l_i_reserved2 =
	ext2fs_swab32(f->osd2.linux2.l_i_reserved2);
	break;
	case EXT2_OS_HURD:
	t->osd1.hurd1.h_i_translator =
	ext2fs_swab32 (f->osd1.hurd1.h_i_translator);
	t->osd2.hurd2.h_i_frag = f->osd2.hurd2.h_i_frag;
	t->osd2.hurd2.h_i_fsize = f->osd2.hurd2.h_i_fsize;
	t->osd2.hurd2.h_i_mode_high =
	ext2fs_swab16 (f->osd2.hurd2.h_i_mode_high);
	t->osd2.hurd2.h_i_uid_high =
	ext2fs_swab16 (f->osd2.hurd2.h_i_uid_high);
	t->osd2.hurd2.h_i_gid_high =
	ext2fs_swab16 (f->osd2.hurd2.h_i_gid_high);
	t->osd2.hurd2.h_i_author =
	ext2fs_swab32 (f->osd2.hurd2.h_i_author);
	break;
	default:
	break;
	}

	if (bufsize < (int) (sizeof(struct ext2_inode) + sizeof(__u16)))
	return; /* no i_extra_isize field */

	if (hostorder)
	extra_isize = f->i_extra_isize;
	t->i_extra_isize = ext2fs_swab16(f->i_extra_isize);
	if (!hostorder)
	extra_isize = t->i_extra_isize;
	if (extra_isize > EXT2_INODE_SIZE(fs->super) -
	sizeof(struct ext2_inode)) {
	/* this is error case: i_extra_size is too large */
	return;
	}

	i = sizeof(struct ext2_inode) + extra_isize + sizeof(__u32);
	if (bufsize < (int) i)
	return; /* no space for EA magic */

	eaf = (__u32 ) (((char ) f) + sizeof(struct ext2_inode) +
	extra_isize);

	attr_magic = *eaf;
	if (!hostorder)
	attr_magic = ext2fs_swab32(attr_magic);

	if (attr_magic != EXT2_EXT_ATTR_MAGIC)
	return; /* it seems no magic here */

	eat = (__u32 ) (((char ) t) + sizeof(struct ext2_inode) +
	extra_isize);
	eat = ext2fs_swab32(eaf);

	/* convert EA(s) */
	ext2fs_swap_ext_attr((char ) (eat + 1), (char ) (eaf + 1),
	bufsize - sizeof(struct ext2_inode) -
	extra_isize - sizeof(__u32), 0);

	}

	void ext2fs_swap_inode(ext2_filsys fs, struct ext2_inode *t,
	struct ext2_inode *f, int hostorder)
	{
	ext2fs_swap_inode_full(fs, (struct ext2_inode_large *) t,
	(struct ext2_inode_large *) f, hostorder,
	sizeof(struct ext2_inode));
	}

	#endif