[thirdparty/e2fsprogs.git] / lib / ext2fs / swapfs.c

/*
 * 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 "config.h"
#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_cluster_size = ext2fs_swab32(sb->s_log_cluster_size);
	sb->s_blocks_per_group = ext2fs_swab32(sb->s_blocks_per_group);
	sb->s_clusters_per_group = ext2fs_swab32(sb->s_clusters_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_mmp_update_interval = ext2fs_swab16(sb->s_mmp_update_interval);
	sb->s_mmp_block = ext2fs_swab64(sb->s_mmp_block);
	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);
	sb->s_usr_quota_inum = ext2fs_swab32(sb->s_usr_quota_inum);
	sb->s_grp_quota_inum = ext2fs_swab32(sb->s_grp_quota_inum);
	sb->s_overhead_blocks = ext2fs_swab32(sb->s_overhead_blocks);
	sb->s_checksum = ext2fs_swab32(sb->s_checksum);

	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)) == 0) {
		/* ... swap only the journal i_size and i_size_high,
		 * and the extent data is not swapped on read */
		i = 15;
	} else {
		/* direct/indirect journal: swap it all */
		i = 0;
	}
	for (; i < 17; i++)
		sb->s_jnl_blocks[i] = ext2fs_swab32(sb->s_jnl_blocks[i]);
	sb->s_backup_bgs[0] = ext2fs_swab32(sb->s_backup_bgs[0]);
	sb->s_backup_bgs[1] = ext2fs_swab32(sb->s_backup_bgs[1]);
	sb->s_checksum_seed = ext2fs_swab32(sb->s_checksum_seed);
}

void ext2fs_swap_group_desc2(ext2_filsys fs, struct ext2_group_desc *gdp)
{
	struct ext4_group_desc *gdp4 = (struct ext4_group_desc *)gdp;

	/* Do the 32-bit parts first */
	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_exclude_bitmap_lo = ext2fs_swab32(gdp->bg_exclude_bitmap_lo);
	gdp->bg_block_bitmap_csum_lo =
		ext2fs_swab16(gdp->bg_block_bitmap_csum_lo);
	gdp->bg_inode_bitmap_csum_lo =
		ext2fs_swab16(gdp->bg_inode_bitmap_csum_lo);
	gdp->bg_itable_unused = ext2fs_swab16(gdp->bg_itable_unused);
	gdp->bg_checksum = ext2fs_swab16(gdp->bg_checksum);
	/* If we're 32-bit, we're done */
	if (fs == NULL || EXT2_DESC_SIZE(fs->super) < EXT2_MIN_DESC_SIZE_64BIT)
		return;

	/* Swap the 64-bit parts */
	gdp4->bg_block_bitmap_hi = ext2fs_swab32(gdp4->bg_block_bitmap_hi);
	gdp4->bg_inode_bitmap_hi = ext2fs_swab32(gdp4->bg_inode_bitmap_hi);
	gdp4->bg_inode_table_hi = ext2fs_swab32(gdp4->bg_inode_table_hi);
	gdp4->bg_free_blocks_count_hi =
		ext2fs_swab16(gdp4->bg_free_blocks_count_hi);
	gdp4->bg_free_inodes_count_hi =
		ext2fs_swab16(gdp4->bg_free_inodes_count_hi);
	gdp4->bg_used_dirs_count_hi =
		ext2fs_swab16(gdp4->bg_used_dirs_count_hi);
	gdp4->bg_itable_unused_hi = ext2fs_swab16(gdp4->bg_itable_unused_hi);
	gdp4->bg_exclude_bitmap_hi = ext2fs_swab16(gdp4->bg_exclude_bitmap_hi);
	gdp4->bg_block_bitmap_csum_hi =
		ext2fs_swab16(gdp4->bg_block_bitmap_csum_hi);
	gdp4->bg_inode_bitmap_csum_hi =
		ext2fs_swab16(gdp4->bg_inode_bitmap_csum_hi);
}

void ext2fs_swap_group_desc(struct ext2_group_desc *gdp)
{
	ext2fs_swap_group_desc2(0, gdp);
}


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);
	to_header->h_checksum = ext2fs_swab32(from_header->h_checksum);
	for (n = 0; n < 3; 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 &&
	       (char *)EXT2_EXT_ATTR_NEXT(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 has_inline_data = 0;
	int islnk = 0;
	int inode_size;
	__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;
	if (hostorder && (f->i_flags & EXT4_INLINE_DATA_FL))
		has_inline_data = 1;
	t->i_flags = ext2fs_swab32(f->i_flags);
	if (!hostorder && (t->i_flags & EXT4_EXTENTS_FL))
		has_extents = 1;
	if (!hostorder && (t->i_flags & EXT4_INLINE_DATA_FL))
		has_inline_data = 1;
	t->i_size_high = ext2fs_swab32(f->i_size_high);
	/*
	 * Extent data and inline data are swapped on access, not here
	 */
	if (!has_extents && !has_inline_data && (!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_checksum_lo =
			ext2fs_swab16(f->osd2.linux2.l_i_checksum_lo);
		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;
	}
	if (extra_isize & 3)
		return;		/* Illegal inode extra_isize */

	inode_size = EXT2_GOOD_OLD_INODE_SIZE + extra_isize;
	if (inode_includes(inode_size, i_checksum_hi))
		t->i_checksum_hi = ext2fs_swab16(f->i_checksum_hi);
	if (inode_includes(inode_size, i_ctime_extra))
		t->i_ctime_extra = ext2fs_swab32(f->i_ctime_extra);
	if (inode_includes(inode_size, i_mtime_extra))
		t->i_mtime_extra = ext2fs_swab32(f->i_mtime_extra);
	if (inode_includes(inode_size, i_atime_extra))
		t->i_atime_extra = ext2fs_swab32(f->i_atime_extra);
	if (inode_includes(inode_size, i_crtime))
		t->i_crtime = ext2fs_swab32(f->i_crtime);
	if (inode_includes(inode_size, i_crtime_extra))
		t->i_crtime_extra = ext2fs_swab32(f->i_crtime_extra);
	if (inode_includes(inode_size, i_version_hi))
		t->i_version_hi = ext2fs_swab32(f->i_version_hi);
	if (inode_includes(inode_size, i_projid))
                t->i_projid = ext2fs_swab16(f->i_projid);

	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));
}

void ext2fs_swap_mmp(struct mmp_struct *mmp)
{
	mmp->mmp_magic = ext2fs_swab32(mmp->mmp_magic);
	mmp->mmp_seq = ext2fs_swab32(mmp->mmp_seq);
	mmp->mmp_time = ext2fs_swab64(mmp->mmp_time);
	mmp->mmp_check_interval = ext2fs_swab16(mmp->mmp_check_interval);
	mmp->mmp_checksum = ext2fs_swab32(mmp->mmp_checksum);
}

errcode_t ext2fs_dirent_swab_in(ext2_filsys fs, char *buf, int flags)
{
	return ext2fs_dirent_swab_in2(fs, buf, fs->blocksize, flags);
}

errcode_t ext2fs_dirent_swab_in2(ext2_filsys fs, char *buf,
				 size_t size, int flags)
{
	errcode_t	retval;
	char		*p, *end;
	struct ext2_dir_entry *dirent;
	unsigned int	name_len, rec_len;

	p = (char *) buf;
	end = (char *) buf + size;
	while (p < end-8) {
		dirent = (struct ext2_dir_entry *) p;
		dirent->inode = ext2fs_swab32(dirent->inode);
		dirent->rec_len = ext2fs_swab16(dirent->rec_len);
		dirent->name_len = ext2fs_swab16(dirent->name_len);
		name_len = dirent->name_len;
		if (flags & EXT2_DIRBLOCK_V2_STRUCT)
			dirent->name_len = ext2fs_swab16(dirent->name_len);
		retval = ext2fs_get_rec_len(fs, dirent, &rec_len);
		if (retval)
			return retval;
		if ((rec_len < 8) || (rec_len % 4)) {
			rec_len = 8;
			retval = EXT2_ET_DIR_CORRUPTED;
		} else if (((name_len & 0xFF) + 8) > rec_len)
			retval = EXT2_ET_DIR_CORRUPTED;
		p += rec_len;
	}

	return 0;
}

errcode_t ext2fs_dirent_swab_out(ext2_filsys fs, char *buf, int flags)
{
	return ext2fs_dirent_swab_out2(fs, buf, fs->blocksize, flags);
}

errcode_t ext2fs_dirent_swab_out2(ext2_filsys fs, char *buf,
				  size_t size, int flags)
{
	errcode_t	retval;
	char		*p, *end;
	unsigned int	rec_len;
	struct ext2_dir_entry *dirent;

	p = buf;
	end = buf + size;
	while (p < end) {
		dirent = (struct ext2_dir_entry *) p;
		retval = ext2fs_get_rec_len(fs, dirent, &rec_len);
		if (retval)
			return retval;
		if ((rec_len < 8) ||
		    (rec_len % 4)) {
			ext2fs_free_mem(&buf);
			return EXT2_ET_DIR_CORRUPTED;
		}
		p += rec_len;
		dirent->inode = ext2fs_swab32(dirent->inode);
		dirent->rec_len = ext2fs_swab16(dirent->rec_len);
		dirent->name_len = ext2fs_swab16(dirent->name_len);

		if (flags & EXT2_DIRBLOCK_V2_STRUCT)
			dirent->name_len = ext2fs_swab16(dirent->name_len);
	}

	return 0;
}

#endif
Commit	Line	Data
50e1e10f TT	1	/*
50e1e10f TT	2	* swapfs.c --- swap ext2 filesystem data structures
efc6f628	3	*
8132d840	4	* Copyright (C) 1995, 1996, 2002 Theodore Ts'o.
19c78dc0 TT	5	*
19c78dc0 TT	6	* %Begin-Header%
543547a5 TT	7	* This file may be redistributed under the terms of the GNU Library
543547a5 TT	8	* General Public License, version 2.
19c78dc0	9	* %End-Header%
50e1e10f TT	10	*/
50e1e10f TT	11
d1154eb4	12	#include "config.h"
50e1e10f	13	#include <stdio.h>
4cbe8af4	14	#if HAVE_UNISTD_H
50e1e10f	15	#include <unistd.h>
4cbe8af4	16	#endif
7331196a	17	#include <string.h>
50e1e10f TT	18	#include <time.h>
50e1e10f TT	19
b5abe6fa	20	#include "ext2_fs.h"
50e1e10f	21	#include "ext2fs.h"
7331196a	22	#include <ext2fs/ext2_ext_attr.h>
50e1e10f	23
a5dda054	24	#ifdef WORDS_BIGENDIAN
e5b38a5f	25	void ext2fs_swap_super(struct ext2_super_block * sb)
50e1e10f	26	{
8132d840	27	int i;
e5b38a5f TT	28	sb->s_inodes_count = ext2fs_swab32(sb->s_inodes_count);
	29	sb->s_blocks_count = ext2fs_swab32(sb->s_blocks_count);
	30	sb->s_r_blocks_count = ext2fs_swab32(sb->s_r_blocks_count);
	31	sb->s_free_blocks_count = ext2fs_swab32(sb->s_free_blocks_count);
	32	sb->s_free_inodes_count = ext2fs_swab32(sb->s_free_inodes_count);
	33	sb->s_first_data_block = ext2fs_swab32(sb->s_first_data_block);
	34	sb->s_log_block_size = ext2fs_swab32(sb->s_log_block_size);
412376ef	35	sb->s_log_cluster_size = ext2fs_swab32(sb->s_log_cluster_size);
e5b38a5f	36	sb->s_blocks_per_group = ext2fs_swab32(sb->s_blocks_per_group);
412376ef	37	sb->s_clusters_per_group = ext2fs_swab32(sb->s_clusters_per_group);
e5b38a5f TT	38	sb->s_inodes_per_group = ext2fs_swab32(sb->s_inodes_per_group);
	39	sb->s_mtime = ext2fs_swab32(sb->s_mtime);
	40	sb->s_wtime = ext2fs_swab32(sb->s_wtime);
	41	sb->s_mnt_count = ext2fs_swab16(sb->s_mnt_count);
	42	sb->s_max_mnt_count = ext2fs_swab16(sb->s_max_mnt_count);
	43	sb->s_magic = ext2fs_swab16(sb->s_magic);
	44	sb->s_state = ext2fs_swab16(sb->s_state);
	45	sb->s_errors = ext2fs_swab16(sb->s_errors);
	46	sb->s_minor_rev_level = ext2fs_swab16(sb->s_minor_rev_level);
	47	sb->s_lastcheck = ext2fs_swab32(sb->s_lastcheck);
	48	sb->s_checkinterval = ext2fs_swab32(sb->s_checkinterval);
	49	sb->s_creator_os = ext2fs_swab32(sb->s_creator_os);
	50	sb->s_rev_level = ext2fs_swab32(sb->s_rev_level);
	51	sb->s_def_resuid = ext2fs_swab16(sb->s_def_resuid);
	52	sb->s_def_resgid = ext2fs_swab16(sb->s_def_resgid);
	53	sb->s_first_ino = ext2fs_swab32(sb->s_first_ino);
	54	sb->s_inode_size = ext2fs_swab16(sb->s_inode_size);
	55	sb->s_block_group_nr = ext2fs_swab16(sb->s_block_group_nr);
	56	sb->s_feature_compat = ext2fs_swab32(sb->s_feature_compat);
	57	sb->s_feature_incompat = ext2fs_swab32(sb->s_feature_incompat);
	58	sb->s_feature_ro_compat = ext2fs_swab32(sb->s_feature_ro_compat);
	59	sb->s_algorithm_usage_bitmap = ext2fs_swab32(sb->s_algorithm_usage_bitmap);
5d28e3be	60	sb->s_reserved_gdt_blocks = ext2fs_swab16(sb->s_reserved_gdt_blocks);
e5b38a5f TT	61	sb->s_journal_inum = ext2fs_swab32(sb->s_journal_inum);
	62	sb->s_journal_dev = ext2fs_swab32(sb->s_journal_dev);
	63	sb->s_last_orphan = ext2fs_swab32(sb->s_last_orphan);
8061d2c1	64	sb->s_desc_size = ext2fs_swab16(sb->s_desc_size);
1ba7a2f2	65	sb->s_default_mount_opts = ext2fs_swab32(sb->s_default_mount_opts);
c046ac7f	66	sb->s_first_meta_bg = ext2fs_swab32(sb->s_first_meta_bg);
1ba7a2f2	67	sb->s_mkfs_time = ext2fs_swab32(sb->s_mkfs_time);
6b3ce987 TT	68	sb->s_blocks_count_hi = ext2fs_swab32(sb->s_blocks_count_hi);
	69	sb->s_r_blocks_count_hi = ext2fs_swab32(sb->s_r_blocks_count_hi);
	70	sb->s_free_blocks_hi = ext2fs_swab32(sb->s_free_blocks_hi);
	71	sb->s_min_extra_isize = ext2fs_swab16(sb->s_min_extra_isize);
	72	sb->s_want_extra_isize = ext2fs_swab16(sb->s_want_extra_isize);
f77704e4	73	sb->s_flags = ext2fs_swab32(sb->s_flags);
0f5eba75 AD	74	sb->s_mmp_update_interval = ext2fs_swab16(sb->s_mmp_update_interval);
0f5eba75 AD	75	sb->s_mmp_block = ext2fs_swab64(sb->s_mmp_block);
b7c5b403	76	sb->s_kbytes_written = ext2fs_swab64(sb->s_kbytes_written);
f5448c19	77	sb->s_snapshot_inum = ext2fs_swab32(sb->s_snapshot_inum);
ccc7cf03	78	sb->s_snapshot_id = ext2fs_swab32(sb->s_snapshot_id);
f5448c19 TT	79	sb->s_snapshot_r_blocks_count =
	80	ext2fs_swab64(sb->s_snapshot_r_blocks_count);
	81	sb->s_snapshot_list = ext2fs_swab32(sb->s_snapshot_list);
0edcc270 AK	82	sb->s_usr_quota_inum = ext2fs_swab32(sb->s_usr_quota_inum);
0edcc270 AK	83	sb->s_grp_quota_inum = ext2fs_swab32(sb->s_grp_quota_inum);
89efc88e TT	84	sb->s_overhead_blocks = ext2fs_swab32(sb->s_overhead_blocks);
89efc88e TT	85	sb->s_checksum = ext2fs_swab32(sb->s_checksum);
f5448c19	86
8132d840 TT	87	for (i=0; i < 4; i++)
8132d840 TT	88	sb->s_hash_seed[i] = ext2fs_swab32(sb->s_hash_seed[i]);
6eb229dc ES	89
6eb229dc ES	90	/* if journal backup is for a valid extent-based journal... */
931b58e1 AD	91	if (ext2fs_extent_header_verify(sb->s_jnl_blocks,
	92	sizeof(sb->s_jnl_blocks)) == 0) {
	93	/* ... swap only the journal i_size and i_size_high,
	94	* and the extent data is not swapped on read */
	95	i = 15;
	96	} else {
	97	/* direct/indirect journal: swap it all */
	98	i = 0;
6eb229dc	99	}
931b58e1	100	for (; i < 17; i++)
1ba7a2f2	101	sb->s_jnl_blocks[i] = ext2fs_swab32(sb->s_jnl_blocks[i]);
65c6c3e0 TT	102	sb->s_backup_bgs[0] = ext2fs_swab32(sb->s_backup_bgs[0]);
65c6c3e0 TT	103	sb->s_backup_bgs[1] = ext2fs_swab32(sb->s_backup_bgs[1]);
2ed0adbc	104	sb->s_checksum_seed = ext2fs_swab32(sb->s_checksum_seed);
50e1e10f TT	105	}
50e1e10f TT	106
cf828f1a	107	void ext2fs_swap_group_desc2(ext2_filsys fs, struct ext2_group_desc *gdp)
50e1e10f	108	{
2bc30417 AD	109	struct ext4_group_desc gdp4 = (struct ext4_group_desc )gdp;
2bc30417 AD	110
cf828f1a	111	/* Do the 32-bit parts first */
50e1e10f TT	112	gdp->bg_block_bitmap = ext2fs_swab32(gdp->bg_block_bitmap);
	113	gdp->bg_inode_bitmap = ext2fs_swab32(gdp->bg_inode_bitmap);
	114	gdp->bg_inode_table = ext2fs_swab32(gdp->bg_inode_table);
	115	gdp->bg_free_blocks_count = ext2fs_swab16(gdp->bg_free_blocks_count);
	116	gdp->bg_free_inodes_count = ext2fs_swab16(gdp->bg_free_inodes_count);
	117	gdp->bg_used_dirs_count = ext2fs_swab16(gdp->bg_used_dirs_count);
f5fa2007	118	gdp->bg_flags = ext2fs_swab16(gdp->bg_flags);
89efc88e TT	119	gdp->bg_exclude_bitmap_lo = ext2fs_swab32(gdp->bg_exclude_bitmap_lo);
	120	gdp->bg_block_bitmap_csum_lo =
	121	ext2fs_swab16(gdp->bg_block_bitmap_csum_lo);
	122	gdp->bg_inode_bitmap_csum_lo =
	123	ext2fs_swab16(gdp->bg_inode_bitmap_csum_lo);
8815fb8a TT	124	gdp->bg_itable_unused = ext2fs_swab16(gdp->bg_itable_unused);
8815fb8a TT	125	gdp->bg_checksum = ext2fs_swab16(gdp->bg_checksum);
cf828f1a	126	/* If we're 32-bit, we're done */
2bc30417	127	if (fs == NULL \|\| EXT2_DESC_SIZE(fs->super) < EXT2_MIN_DESC_SIZE_64BIT)
cf828f1a TT	128	return;
	129
	130	/* Swap the 64-bit parts */
cf828f1a TT	131	gdp4->bg_block_bitmap_hi = ext2fs_swab32(gdp4->bg_block_bitmap_hi);
	132	gdp4->bg_inode_bitmap_hi = ext2fs_swab32(gdp4->bg_inode_bitmap_hi);
	133	gdp4->bg_inode_table_hi = ext2fs_swab32(gdp4->bg_inode_table_hi);
	134	gdp4->bg_free_blocks_count_hi =
	135	ext2fs_swab16(gdp4->bg_free_blocks_count_hi);
	136	gdp4->bg_free_inodes_count_hi =
	137	ext2fs_swab16(gdp4->bg_free_inodes_count_hi);
	138	gdp4->bg_used_dirs_count_hi =
	139	ext2fs_swab16(gdp4->bg_used_dirs_count_hi);
	140	gdp4->bg_itable_unused_hi = ext2fs_swab16(gdp4->bg_itable_unused_hi);
ae96c678 TT	141	gdp4->bg_exclude_bitmap_hi = ext2fs_swab16(gdp4->bg_exclude_bitmap_hi);
	142	gdp4->bg_block_bitmap_csum_hi =
	143	ext2fs_swab16(gdp4->bg_block_bitmap_csum_hi);
	144	gdp4->bg_inode_bitmap_csum_hi =
	145	ext2fs_swab16(gdp4->bg_inode_bitmap_csum_hi);
50e1e10f TT	146	}
50e1e10f TT	147
cf828f1a TT	148	void ext2fs_swap_group_desc(struct ext2_group_desc *gdp)
cf828f1a TT	149	{
ae96c678	150	ext2fs_swap_group_desc2(0, gdp);
cf828f1a TT	151	}
	152
	153
fefaef39 AD	154	void ext2fs_swap_ext_attr_header(struct ext2_ext_attr_header *to_header,
	155	struct ext2_ext_attr_header *from_header)
	156	{
	157	int n;
	158
	159	to_header->h_magic = ext2fs_swab32(from_header->h_magic);
	160	to_header->h_blocks = ext2fs_swab32(from_header->h_blocks);
	161	to_header->h_refcount = ext2fs_swab32(from_header->h_refcount);
	162	to_header->h_hash = ext2fs_swab32(from_header->h_hash);
39f5659a DW	163	to_header->h_checksum = ext2fs_swab32(from_header->h_checksum);
39f5659a DW	164	for (n = 0; n < 3; n++)
fefaef39 AD	165	to_header->h_reserved[n] =
	166	ext2fs_swab32(from_header->h_reserved[n]);
	167	}
	168
	169	void ext2fs_swap_ext_attr_entry(struct ext2_ext_attr_entry *to_entry,
	170	struct ext2_ext_attr_entry *from_entry)
	171	{
	172	to_entry->e_value_offs = ext2fs_swab16(from_entry->e_value_offs);
	173	to_entry->e_value_block = ext2fs_swab32(from_entry->e_value_block);
	174	to_entry->e_value_size = ext2fs_swab32(from_entry->e_value_size);
	175	to_entry->e_hash = ext2fs_swab32(from_entry->e_hash);
	176	}
	177
7331196a TT	178	void ext2fs_swap_ext_attr(char to, char from, int bufsize, int has_header)
	179	{
	180	struct ext2_ext_attr_header *from_header =
	181	(struct ext2_ext_attr_header *)from;
	182	struct ext2_ext_attr_header *to_header =
	183	(struct ext2_ext_attr_header *)to;
	184	struct ext2_ext_attr_entry from_entry, to_entry;
	185	char from_end = (char )from_header + bufsize;
7331196a TT	186
	187	if (to_header != from_header)
	188	memcpy(to_header, from_header, bufsize);
	189
7331196a	190	if (has_header) {
fefaef39 AD	191	ext2fs_swap_ext_attr_header(to_header, from_header);
fefaef39 AD	192
7331196a TT	193	from_entry = (struct ext2_ext_attr_entry *)(from_header+1);
7331196a TT	194	to_entry = (struct ext2_ext_attr_entry *)(to_header+1);
fefaef39 AD	195	} else {
	196	from_entry = (struct ext2_ext_attr_entry *)from_header;
	197	to_entry = (struct ext2_ext_attr_entry *)to_header;
7331196a TT	198	}
7331196a TT	199
88334ce0 DW	200	while ((char *)from_entry < from_end &&
	201	(char *)EXT2_EXT_ATTR_NEXT(from_entry) <= from_end &&
	202	(__u32 )from_entry) {
fefaef39	203	ext2fs_swap_ext_attr_entry(to_entry, from_entry);
7331196a TT	204	from_entry = EXT2_EXT_ATTR_NEXT(from_entry);
	205	to_entry = EXT2_EXT_ATTR_NEXT(to_entry);
	206	}
	207	}
	208
	209	void ext2fs_swap_inode_full(ext2_filsys fs, struct ext2_inode_large *t,
	210	struct ext2_inode_large *f, int hostorder,
	211	int bufsize)
1e3472c5	212	{
82e54188	213	unsigned i, has_data_blocks, extra_isize, attr_magic;
fb6627a3	214	int has_extents = 0;
416c1de9	215	int has_inline_data = 0;
1e3472c5	216	int islnk = 0;
17ea174a	217	int inode_size;
7331196a TT	218	__u32 eaf, eat;
7331196a TT	219
1e3472c5 TT	220	if (hostorder && LINUX_S_ISLNK(f->i_mode))
	221	islnk = 1;
	222	t->i_mode = ext2fs_swab16(f->i_mode);
	223	if (!hostorder && LINUX_S_ISLNK(t->i_mode))
	224	islnk = 1;
	225	t->i_uid = ext2fs_swab16(f->i_uid);
	226	t->i_size = ext2fs_swab32(f->i_size);
	227	t->i_atime = ext2fs_swab32(f->i_atime);
	228	t->i_ctime = ext2fs_swab32(f->i_ctime);
	229	t->i_mtime = ext2fs_swab32(f->i_mtime);
	230	t->i_dtime = ext2fs_swab32(f->i_dtime);
	231	t->i_gid = ext2fs_swab16(f->i_gid);
	232	t->i_links_count = ext2fs_swab16(f->i_links_count);
db9097ca	233	t->i_file_acl = ext2fs_swab32(f->i_file_acl);
3f4c46e3	234	if (hostorder)
efc6f628	235	has_data_blocks = ext2fs_inode_data_blocks(fs,
3f4c46e3	236	(struct ext2_inode *) f);
1e3472c5	237	t->i_blocks = ext2fs_swab32(f->i_blocks);
3f4c46e3	238	if (!hostorder)
efc6f628	239	has_data_blocks = ext2fs_inode_data_blocks(fs,
3f4c46e3	240	(struct ext2_inode *) t);
4ce3b774	241	if (hostorder && (f->i_flags & EXT4_EXTENTS_FL))
fb6627a3	242	has_extents = 1;
416c1de9 ZL	243	if (hostorder && (f->i_flags & EXT4_INLINE_DATA_FL))
416c1de9 ZL	244	has_inline_data = 1;
1e3472c5	245	t->i_flags = ext2fs_swab32(f->i_flags);
fb6627a3 ES	246	if (!hostorder && (t->i_flags & EXT4_EXTENTS_FL))
fb6627a3 ES	247	has_extents = 1;
2432a41a	248	if (!hostorder && (t->i_flags & EXT4_INLINE_DATA_FL))
416c1de9	249	has_inline_data = 1;
578fcbfd	250	t->i_size_high = ext2fs_swab32(f->i_size_high);
416c1de9 ZL	251	/*
	252	* Extent data and inline data are swapped on access, not here
	253	*/
	254	if (!has_extents && !has_inline_data && (!islnk \|\| has_data_blocks)) {
1e3472c5 TT	255	for (i = 0; i < EXT2_N_BLOCKS; i++)
	256	t->i_block[i] = ext2fs_swab32(f->i_block[i]);
	257	} else if (t != f) {
	258	for (i = 0; i < EXT2_N_BLOCKS; i++)
	259	t->i_block[i] = f->i_block[i];
	260	}
e72a9ba3	261	t->i_generation = ext2fs_swab32(f->i_generation);
1e3472c5	262	t->i_faddr = ext2fs_swab32(f->i_faddr);
50e1e10f	263
1e3472c5 TT	264	switch (fs->super->s_creator_os) {
1e3472c5 TT	265	case EXT2_OS_LINUX:
d362a3fb TT	266	t->osd1.linux1.l_i_version =
d362a3fb TT	267	ext2fs_swab32(f->osd1.linux1.l_i_version);
efc6f628	268	t->osd2.linux2.l_i_blocks_hi =
5d17119d	269	ext2fs_swab16(f->osd2.linux2.l_i_blocks_hi);
2ea504bd AK	270	t->osd2.linux2.l_i_file_acl_high =
2ea504bd AK	271	ext2fs_swab16(f->osd2.linux2.l_i_file_acl_high);
80e808fc TT	272	t->osd2.linux2.l_i_uid_high =
	273	ext2fs_swab16 (f->osd2.linux2.l_i_uid_high);
	274	t->osd2.linux2.l_i_gid_high =
	275	ext2fs_swab16 (f->osd2.linux2.l_i_gid_high);
ae96c678	276	t->osd2.linux2.l_i_checksum_lo =
a7a63675	277	ext2fs_swab16(f->osd2.linux2.l_i_checksum_lo);
1e3472c5 TT	278	break;
	279	case EXT2_OS_HURD:
	280	t->osd1.hurd1.h_i_translator =
	281	ext2fs_swab32 (f->osd1.hurd1.h_i_translator);
	282	t->osd2.hurd2.h_i_frag = f->osd2.hurd2.h_i_frag;
	283	t->osd2.hurd2.h_i_fsize = f->osd2.hurd2.h_i_fsize;
	284	t->osd2.hurd2.h_i_mode_high =
	285	ext2fs_swab16 (f->osd2.hurd2.h_i_mode_high);
	286	t->osd2.hurd2.h_i_uid_high =
	287	ext2fs_swab16 (f->osd2.hurd2.h_i_uid_high);
	288	t->osd2.hurd2.h_i_gid_high =
	289	ext2fs_swab16 (f->osd2.hurd2.h_i_gid_high);
	290	t->osd2.hurd2.h_i_author =
	291	ext2fs_swab32 (f->osd2.hurd2.h_i_author);
	292	break;
c9548bc3	293	default:
1e3472c5 TT	294	break;
1e3472c5 TT	295	}
7331196a TT	296
	297	if (bufsize < (int) (sizeof(struct ext2_inode) + sizeof(__u16)))
	298	return; /* no i_extra_isize field */
	299
c844010c TT	300	if (hostorder)
c844010c TT	301	extra_isize = f->i_extra_isize;
7331196a	302	t->i_extra_isize = ext2fs_swab16(f->i_extra_isize);
c844010c TT	303	if (!hostorder)
	304	extra_isize = t->i_extra_isize;
	305	if (extra_isize > EXT2_INODE_SIZE(fs->super) -
7331196a TT	306	sizeof(struct ext2_inode)) {
	307	/* this is error case: i_extra_size is too large */
	308	return;
	309	}
8d7a6392 TT	310	if (extra_isize & 3)
8d7a6392 TT	311	return; /* Illegal inode extra_isize */
7331196a	312
080e09b4 LX	313	inode_size = EXT2_GOOD_OLD_INODE_SIZE + extra_isize;
080e09b4 LX	314	if (inode_includes(inode_size, i_checksum_hi))
ae96c678	315	t->i_checksum_hi = ext2fs_swab16(f->i_checksum_hi);
080e09b4	316	if (inode_includes(inode_size, i_ctime_extra))
ae96c678	317	t->i_ctime_extra = ext2fs_swab32(f->i_ctime_extra);
080e09b4	318	if (inode_includes(inode_size, i_mtime_extra))
ae96c678	319	t->i_mtime_extra = ext2fs_swab32(f->i_mtime_extra);
080e09b4	320	if (inode_includes(inode_size, i_atime_extra))
ae96c678	321	t->i_atime_extra = ext2fs_swab32(f->i_atime_extra);
080e09b4	322	if (inode_includes(inode_size, i_crtime))
ae96c678	323	t->i_crtime = ext2fs_swab32(f->i_crtime);
080e09b4	324	if (inode_includes(inode_size, i_crtime_extra))
ae96c678	325	t->i_crtime_extra = ext2fs_swab32(f->i_crtime_extra);
080e09b4	326	if (inode_includes(inode_size, i_version_hi))
ae96c678	327	t->i_version_hi = ext2fs_swab32(f->i_version_hi);
080e09b4 LX	328	if (inode_includes(inode_size, i_projid))
080e09b4 LX	329	t->i_projid = ext2fs_swab16(f->i_projid);
ae96c678	330
c844010c	331	i = sizeof(struct ext2_inode) + extra_isize + sizeof(__u32);
7331196a TT	332	if (bufsize < (int) i)
	333	return; /* no space for EA magic */
	334
	335	eaf = (__u32 ) (((char ) f) + sizeof(struct ext2_inode) +
c844010c	336	extra_isize);
7331196a	337
82e54188 ES	338	attr_magic = *eaf;
	339	if (!hostorder)
	340	attr_magic = ext2fs_swab32(attr_magic);
	341
	342	if (attr_magic != EXT2_EXT_ATTR_MAGIC)
7331196a TT	343	return; /* it seems no magic here */
	344
	345	eat = (__u32 ) (((char ) t) + sizeof(struct ext2_inode) +
c844010c	346	extra_isize);
7331196a TT	347	eat = ext2fs_swab32(eaf);
	348
	349	/* convert EA(s) */
	350	ext2fs_swap_ext_attr((char ) (eat + 1), (char ) (eaf + 1),
	351	bufsize - sizeof(struct ext2_inode) -
c844010c	352	extra_isize - sizeof(__u32), 0);
7331196a	353
1e3472c5	354	}
7331196a TT	355
	356	void ext2fs_swap_inode(ext2_filsys fs, struct ext2_inode *t,
	357	struct ext2_inode *f, int hostorder)
	358	{
	359	ext2fs_swap_inode_full(fs, (struct ext2_inode_large *) t,
	360	(struct ext2_inode_large *) f, hostorder,
	361	sizeof(struct ext2_inode));
	362	}
	363
0f5eba75 AD	364	void ext2fs_swap_mmp(struct mmp_struct *mmp)
	365	{
	366	mmp->mmp_magic = ext2fs_swab32(mmp->mmp_magic);
	367	mmp->mmp_seq = ext2fs_swab32(mmp->mmp_seq);
	368	mmp->mmp_time = ext2fs_swab64(mmp->mmp_time);
	369	mmp->mmp_check_interval = ext2fs_swab16(mmp->mmp_check_interval);
a9620d8b	370	mmp->mmp_checksum = ext2fs_swab32(mmp->mmp_checksum);
0f5eba75 AD	371	}
0f5eba75 AD	372
81683c6a	373	errcode_t ext2fs_dirent_swab_in(ext2_filsys fs, char *buf, int flags)
11f93746	374	{
f9574ad0	375	return ext2fs_dirent_swab_in2(fs, buf, fs->blocksize, flags);
11f93746 ZL	376	}
	377
	378	errcode_t ext2fs_dirent_swab_in2(ext2_filsys fs, char *buf,
	379	size_t size, int flags)
81683c6a DW	380	{
	381	errcode_t retval;
	382	char p, end;
	383	struct ext2_dir_entry *dirent;
	384	unsigned int name_len, rec_len;
	385
	386	p = (char *) buf;
11f93746	387	end = (char *) buf + size;
81683c6a DW	388	while (p < end-8) {
	389	dirent = (struct ext2_dir_entry *) p;
	390	dirent->inode = ext2fs_swab32(dirent->inode);
	391	dirent->rec_len = ext2fs_swab16(dirent->rec_len);
	392	dirent->name_len = ext2fs_swab16(dirent->name_len);
	393	name_len = dirent->name_len;
	394	if (flags & EXT2_DIRBLOCK_V2_STRUCT)
	395	dirent->name_len = ext2fs_swab16(dirent->name_len);
	396	retval = ext2fs_get_rec_len(fs, dirent, &rec_len);
	397	if (retval)
	398	return retval;
	399	if ((rec_len < 8) \|\| (rec_len % 4)) {
	400	rec_len = 8;
	401	retval = EXT2_ET_DIR_CORRUPTED;
	402	} else if (((name_len & 0xFF) + 8) > rec_len)
	403	retval = EXT2_ET_DIR_CORRUPTED;
	404	p += rec_len;
	405	}
	406
	407	return 0;
	408	}
	409
	410	errcode_t ext2fs_dirent_swab_out(ext2_filsys fs, char *buf, int flags)
11f93746 ZL	411	{
	412	return ext2fs_dirent_swab_out2(fs, buf, fs->blocksize, flags);
	413	}
	414
	415	errcode_t ext2fs_dirent_swab_out2(ext2_filsys fs, char *buf,
	416	size_t size, int flags)
81683c6a DW	417	{
	418	errcode_t retval;
	419	char p, end;
	420	unsigned int rec_len;
	421	struct ext2_dir_entry *dirent;
	422
	423	p = buf;
11f93746	424	end = buf + size;
81683c6a DW	425	while (p < end) {
	426	dirent = (struct ext2_dir_entry *) p;
	427	retval = ext2fs_get_rec_len(fs, dirent, &rec_len);
	428	if (retval)
	429	return retval;
	430	if ((rec_len < 8) \|\|
	431	(rec_len % 4)) {
	432	ext2fs_free_mem(&buf);
	433	return EXT2_ET_DIR_CORRUPTED;
	434	}
	435	p += rec_len;
	436	dirent->inode = ext2fs_swab32(dirent->inode);
	437	dirent->rec_len = ext2fs_swab16(dirent->rec_len);
	438	dirent->name_len = ext2fs_swab16(dirent->name_len);
	439
	440	if (flags & EXT2_DIRBLOCK_V2_STRUCT)
	441	dirent->name_len = ext2fs_swab16(dirent->name_len);
	442	}
	443
	444	return 0;
	445	}
	446
5df55d7f	447	#endif