[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 <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_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]);
}

void ext2fs_swap_group_desc2(ext2_filsys fs, struct ext2_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 && (!fs->super->s_desc_size ||
		   (fs->super->s_desc_size < EXT2_MIN_DESC_SIZE_64BIT)))
		return;

	/* Swap the 64-bit parts */
	struct ext4_group_desc *gdp4 = (struct ext4_group_desc *) gdp;
	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);
	gdp->bg_exclude_bitmap_hi = ext2fs_swab16(gdp->bg_exclude_bitmap_hi);
	gdp->bg_block_bitmap_csum_hi =
		ext2fs_swab16(gdp->bg_block_bitmap_csum_hi);
	gdp->bg_inode_bitmap_csum_hi =
		ext2fs_swab16(gdp->bg_inode_bitmap_csum_hi);
}

void ext2fs_swap_group_desc(struct ext2_group_desc *gdp)
{
	return 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);
	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_checksum =
			ext2fs_swab32(f->osd2.linux2.checksum);
		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
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	*/
	11
	12	#include <stdio.h>
4cbe8af4	13	#if HAVE_UNISTD_H
50e1e10f	14	#include <unistd.h>
4cbe8af4	15	#endif
7331196a	16	#include <string.h>
50e1e10f TT	17	#include <time.h>
50e1e10f TT	18
b5abe6fa	19	#include "ext2_fs.h"
50e1e10f	20	#include "ext2fs.h"
7331196a	21	#include <ext2fs/ext2_ext_attr.h>
50e1e10f	22
a5dda054	23	#ifdef WORDS_BIGENDIAN
e5b38a5f	24	void ext2fs_swap_super(struct ext2_super_block * sb)
50e1e10f	25	{
8132d840	26	int i;
e5b38a5f TT	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);
412376ef	34	sb->s_log_cluster_size = ext2fs_swab32(sb->s_log_cluster_size);
e5b38a5f	35	sb->s_blocks_per_group = ext2fs_swab32(sb->s_blocks_per_group);
412376ef	36	sb->s_clusters_per_group = ext2fs_swab32(sb->s_clusters_per_group);
e5b38a5f TT	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);
5d28e3be	59	sb->s_reserved_gdt_blocks = ext2fs_swab16(sb->s_reserved_gdt_blocks);
e5b38a5f TT	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);
8061d2c1	63	sb->s_desc_size = ext2fs_swab16(sb->s_desc_size);
1ba7a2f2	64	sb->s_default_mount_opts = ext2fs_swab32(sb->s_default_mount_opts);
c046ac7f	65	sb->s_first_meta_bg = ext2fs_swab32(sb->s_first_meta_bg);
1ba7a2f2	66	sb->s_mkfs_time = ext2fs_swab32(sb->s_mkfs_time);
6b3ce987 TT	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);
f77704e4	72	sb->s_flags = ext2fs_swab32(sb->s_flags);
b7c5b403	73	sb->s_kbytes_written = ext2fs_swab64(sb->s_kbytes_written);
f5448c19	74	sb->s_snapshot_inum = ext2fs_swab32(sb->s_snapshot_inum);
ccc7cf03	75	sb->s_snapshot_id = ext2fs_swab32(sb->s_snapshot_id);
f5448c19 TT	76	sb->s_snapshot_r_blocks_count =
	77	ext2fs_swab64(sb->s_snapshot_r_blocks_count);
	78	sb->s_snapshot_list = ext2fs_swab32(sb->s_snapshot_list);
0edcc270 AK	79	sb->s_usr_quota_inum = ext2fs_swab32(sb->s_usr_quota_inum);
0edcc270 AK	80	sb->s_grp_quota_inum = ext2fs_swab32(sb->s_grp_quota_inum);
89efc88e TT	81	sb->s_overhead_blocks = ext2fs_swab32(sb->s_overhead_blocks);
89efc88e TT	82	sb->s_checksum = ext2fs_swab32(sb->s_checksum);
f5448c19	83
8132d840 TT	84	for (i=0; i < 4; i++)
8132d840 TT	85	sb->s_hash_seed[i] = ext2fs_swab32(sb->s_hash_seed[i]);
6eb229dc ES	86
6eb229dc ES	87	/* if journal backup is for a valid extent-based journal... */
931b58e1 AD	88	if (ext2fs_extent_header_verify(sb->s_jnl_blocks,
	89	sizeof(sb->s_jnl_blocks)) == 0) {
	90	/* ... swap only the journal i_size and i_size_high,
	91	* and the extent data is not swapped on read */
	92	i = 15;
	93	} else {
	94	/* direct/indirect journal: swap it all */
	95	i = 0;
6eb229dc	96	}
931b58e1	97	for (; i < 17; i++)
1ba7a2f2	98	sb->s_jnl_blocks[i] = ext2fs_swab32(sb->s_jnl_blocks[i]);
50e1e10f TT	99	}
50e1e10f TT	100
cf828f1a	101	void ext2fs_swap_group_desc2(ext2_filsys fs, struct ext2_group_desc *gdp)
50e1e10f	102	{
cf828f1a	103	/* Do the 32-bit parts first */
50e1e10f TT	104	gdp->bg_block_bitmap = ext2fs_swab32(gdp->bg_block_bitmap);
	105	gdp->bg_inode_bitmap = ext2fs_swab32(gdp->bg_inode_bitmap);
	106	gdp->bg_inode_table = ext2fs_swab32(gdp->bg_inode_table);
	107	gdp->bg_free_blocks_count = ext2fs_swab16(gdp->bg_free_blocks_count);
	108	gdp->bg_free_inodes_count = ext2fs_swab16(gdp->bg_free_inodes_count);
	109	gdp->bg_used_dirs_count = ext2fs_swab16(gdp->bg_used_dirs_count);
f5fa2007	110	gdp->bg_flags = ext2fs_swab16(gdp->bg_flags);
89efc88e TT	111	gdp->bg_exclude_bitmap_lo = ext2fs_swab32(gdp->bg_exclude_bitmap_lo);
	112	gdp->bg_block_bitmap_csum_lo =
	113	ext2fs_swab16(gdp->bg_block_bitmap_csum_lo);
	114	gdp->bg_inode_bitmap_csum_lo =
	115	ext2fs_swab16(gdp->bg_inode_bitmap_csum_lo);
8815fb8a TT	116	gdp->bg_itable_unused = ext2fs_swab16(gdp->bg_itable_unused);
8815fb8a TT	117	gdp->bg_checksum = ext2fs_swab16(gdp->bg_checksum);
cf828f1a	118	/* If we're 32-bit, we're done */
ccc7cf03 TT	119	if (fs && (!fs->super->s_desc_size \|\|
ccc7cf03 TT	120	(fs->super->s_desc_size < EXT2_MIN_DESC_SIZE_64BIT)))
cf828f1a TT	121	return;
	122
	123	/* Swap the 64-bit parts */
	124	struct ext4_group_desc gdp4 = (struct ext4_group_desc ) gdp;
	125	gdp4->bg_block_bitmap_hi = ext2fs_swab32(gdp4->bg_block_bitmap_hi);
	126	gdp4->bg_inode_bitmap_hi = ext2fs_swab32(gdp4->bg_inode_bitmap_hi);
	127	gdp4->bg_inode_table_hi = ext2fs_swab32(gdp4->bg_inode_table_hi);
	128	gdp4->bg_free_blocks_count_hi =
	129	ext2fs_swab16(gdp4->bg_free_blocks_count_hi);
	130	gdp4->bg_free_inodes_count_hi =
	131	ext2fs_swab16(gdp4->bg_free_inodes_count_hi);
	132	gdp4->bg_used_dirs_count_hi =
	133	ext2fs_swab16(gdp4->bg_used_dirs_count_hi);
	134	gdp4->bg_itable_unused_hi = ext2fs_swab16(gdp4->bg_itable_unused_hi);
89efc88e TT	135	gdp->bg_exclude_bitmap_hi = ext2fs_swab16(gdp->bg_exclude_bitmap_hi);
	136	gdp->bg_block_bitmap_csum_hi =
	137	ext2fs_swab16(gdp->bg_block_bitmap_csum_hi);
	138	gdp->bg_inode_bitmap_csum_hi =
	139	ext2fs_swab16(gdp->bg_inode_bitmap_csum_hi);
50e1e10f TT	140	}
50e1e10f TT	141
cf828f1a TT	142	void ext2fs_swap_group_desc(struct ext2_group_desc *gdp)
	143	{
	144	return ext2fs_swap_group_desc2(0, gdp);
	145	}
	146
	147
fefaef39 AD	148	void ext2fs_swap_ext_attr_header(struct ext2_ext_attr_header *to_header,
	149	struct ext2_ext_attr_header *from_header)
	150	{
	151	int n;
	152
	153	to_header->h_magic = ext2fs_swab32(from_header->h_magic);
	154	to_header->h_blocks = ext2fs_swab32(from_header->h_blocks);
	155	to_header->h_refcount = ext2fs_swab32(from_header->h_refcount);
	156	to_header->h_hash = ext2fs_swab32(from_header->h_hash);
	157	for (n = 0; n < 4; n++)
	158	to_header->h_reserved[n] =
	159	ext2fs_swab32(from_header->h_reserved[n]);
	160	}
	161
	162	void ext2fs_swap_ext_attr_entry(struct ext2_ext_attr_entry *to_entry,
	163	struct ext2_ext_attr_entry *from_entry)
	164	{
	165	to_entry->e_value_offs = ext2fs_swab16(from_entry->e_value_offs);
	166	to_entry->e_value_block = ext2fs_swab32(from_entry->e_value_block);
	167	to_entry->e_value_size = ext2fs_swab32(from_entry->e_value_size);
	168	to_entry->e_hash = ext2fs_swab32(from_entry->e_hash);
	169	}
	170
7331196a TT	171	void ext2fs_swap_ext_attr(char to, char from, int bufsize, int has_header)
	172	{
	173	struct ext2_ext_attr_header *from_header =
	174	(struct ext2_ext_attr_header *)from;
	175	struct ext2_ext_attr_header *to_header =
	176	(struct ext2_ext_attr_header *)to;
	177	struct ext2_ext_attr_entry from_entry, to_entry;
	178	char from_end = (char )from_header + bufsize;
7331196a TT	179
	180	if (to_header != from_header)
	181	memcpy(to_header, from_header, bufsize);
	182
7331196a	183	if (has_header) {
fefaef39 AD	184	ext2fs_swap_ext_attr_header(to_header, from_header);
fefaef39 AD	185
7331196a TT	186	from_entry = (struct ext2_ext_attr_entry *)(from_header+1);
7331196a TT	187	to_entry = (struct ext2_ext_attr_entry *)(to_header+1);
fefaef39 AD	188	} else {
	189	from_entry = (struct ext2_ext_attr_entry *)from_header;
	190	to_entry = (struct ext2_ext_attr_entry *)to_header;
7331196a TT	191	}
	192
	193	while ((char )from_entry < from_end && (__u32 *)from_entry) {
fefaef39	194	ext2fs_swap_ext_attr_entry(to_entry, from_entry);
7331196a TT	195	from_entry = EXT2_EXT_ATTR_NEXT(from_entry);
	196	to_entry = EXT2_EXT_ATTR_NEXT(to_entry);
	197	}
	198	}
	199
	200	void ext2fs_swap_inode_full(ext2_filsys fs, struct ext2_inode_large *t,
	201	struct ext2_inode_large *f, int hostorder,
	202	int bufsize)
1e3472c5	203	{
82e54188	204	unsigned i, has_data_blocks, extra_isize, attr_magic;
fb6627a3	205	int has_extents = 0;
1e3472c5	206	int islnk = 0;
7331196a TT	207	__u32 eaf, eat;
7331196a TT	208
1e3472c5 TT	209	if (hostorder && LINUX_S_ISLNK(f->i_mode))
	210	islnk = 1;
	211	t->i_mode = ext2fs_swab16(f->i_mode);
	212	if (!hostorder && LINUX_S_ISLNK(t->i_mode))
	213	islnk = 1;
	214	t->i_uid = ext2fs_swab16(f->i_uid);
	215	t->i_size = ext2fs_swab32(f->i_size);
	216	t->i_atime = ext2fs_swab32(f->i_atime);
	217	t->i_ctime = ext2fs_swab32(f->i_ctime);
	218	t->i_mtime = ext2fs_swab32(f->i_mtime);
	219	t->i_dtime = ext2fs_swab32(f->i_dtime);
	220	t->i_gid = ext2fs_swab16(f->i_gid);
	221	t->i_links_count = ext2fs_swab16(f->i_links_count);
db9097ca	222	t->i_file_acl = ext2fs_swab32(f->i_file_acl);
3f4c46e3	223	if (hostorder)
efc6f628	224	has_data_blocks = ext2fs_inode_data_blocks(fs,
3f4c46e3	225	(struct ext2_inode *) f);
1e3472c5	226	t->i_blocks = ext2fs_swab32(f->i_blocks);
3f4c46e3	227	if (!hostorder)
efc6f628	228	has_data_blocks = ext2fs_inode_data_blocks(fs,
3f4c46e3	229	(struct ext2_inode *) t);
4ce3b774	230	if (hostorder && (f->i_flags & EXT4_EXTENTS_FL))
fb6627a3	231	has_extents = 1;
1e3472c5	232	t->i_flags = ext2fs_swab32(f->i_flags);
fb6627a3 ES	233	if (!hostorder && (t->i_flags & EXT4_EXTENTS_FL))
fb6627a3 ES	234	has_extents = 1;
1ba7a2f2	235	t->i_dir_acl = ext2fs_swab32(f->i_dir_acl);
fb6627a3 ES	236	/* extent data are swapped on access, not here */
fb6627a3 ES	237	if (!has_extents && (!islnk \|\| has_data_blocks)) {
1e3472c5 TT	238	for (i = 0; i < EXT2_N_BLOCKS; i++)
	239	t->i_block[i] = ext2fs_swab32(f->i_block[i]);
	240	} else if (t != f) {
	241	for (i = 0; i < EXT2_N_BLOCKS; i++)
	242	t->i_block[i] = f->i_block[i];
	243	}
e72a9ba3	244	t->i_generation = ext2fs_swab32(f->i_generation);
1e3472c5	245	t->i_faddr = ext2fs_swab32(f->i_faddr);
50e1e10f	246
1e3472c5 TT	247	switch (fs->super->s_creator_os) {
1e3472c5 TT	248	case EXT2_OS_LINUX:
d362a3fb TT	249	t->osd1.linux1.l_i_version =
d362a3fb TT	250	ext2fs_swab32(f->osd1.linux1.l_i_version);
efc6f628	251	t->osd2.linux2.l_i_blocks_hi =
5d17119d	252	ext2fs_swab16(f->osd2.linux2.l_i_blocks_hi);
2ea504bd AK	253	t->osd2.linux2.l_i_file_acl_high =
2ea504bd AK	254	ext2fs_swab16(f->osd2.linux2.l_i_file_acl_high);
80e808fc TT	255	t->osd2.linux2.l_i_uid_high =
	256	ext2fs_swab16 (f->osd2.linux2.l_i_uid_high);
	257	t->osd2.linux2.l_i_gid_high =
	258	ext2fs_swab16 (f->osd2.linux2.l_i_gid_high);
89efc88e TT	259	t->osd2.linux2.l_i_checksum =
89efc88e TT	260	ext2fs_swab32(f->osd2.linux2.checksum);
1e3472c5 TT	261	break;
	262	case EXT2_OS_HURD:
	263	t->osd1.hurd1.h_i_translator =
	264	ext2fs_swab32 (f->osd1.hurd1.h_i_translator);
	265	t->osd2.hurd2.h_i_frag = f->osd2.hurd2.h_i_frag;
	266	t->osd2.hurd2.h_i_fsize = f->osd2.hurd2.h_i_fsize;
	267	t->osd2.hurd2.h_i_mode_high =
	268	ext2fs_swab16 (f->osd2.hurd2.h_i_mode_high);
	269	t->osd2.hurd2.h_i_uid_high =
	270	ext2fs_swab16 (f->osd2.hurd2.h_i_uid_high);
	271	t->osd2.hurd2.h_i_gid_high =
	272	ext2fs_swab16 (f->osd2.hurd2.h_i_gid_high);
	273	t->osd2.hurd2.h_i_author =
	274	ext2fs_swab32 (f->osd2.hurd2.h_i_author);
	275	break;
c9548bc3	276	default:
1e3472c5 TT	277	break;
1e3472c5 TT	278	}
7331196a TT	279
	280	if (bufsize < (int) (sizeof(struct ext2_inode) + sizeof(__u16)))
	281	return; /* no i_extra_isize field */
	282
c844010c TT	283	if (hostorder)
c844010c TT	284	extra_isize = f->i_extra_isize;
7331196a	285	t->i_extra_isize = ext2fs_swab16(f->i_extra_isize);
c844010c TT	286	if (!hostorder)
	287	extra_isize = t->i_extra_isize;
	288	if (extra_isize > EXT2_INODE_SIZE(fs->super) -
7331196a TT	289	sizeof(struct ext2_inode)) {
	290	/* this is error case: i_extra_size is too large */
	291	return;
	292	}
	293
c844010c	294	i = sizeof(struct ext2_inode) + extra_isize + sizeof(__u32);
7331196a TT	295	if (bufsize < (int) i)
	296	return; /* no space for EA magic */
	297
	298	eaf = (__u32 ) (((char ) f) + sizeof(struct ext2_inode) +
c844010c	299	extra_isize);
7331196a	300
82e54188 ES	301	attr_magic = *eaf;
	302	if (!hostorder)
	303	attr_magic = ext2fs_swab32(attr_magic);
	304
	305	if (attr_magic != EXT2_EXT_ATTR_MAGIC)
7331196a TT	306	return; /* it seems no magic here */
	307
	308	eat = (__u32 ) (((char ) t) + sizeof(struct ext2_inode) +
c844010c	309	extra_isize);
7331196a TT	310	eat = ext2fs_swab32(eaf);
	311
	312	/* convert EA(s) */
	313	ext2fs_swap_ext_attr((char ) (eat + 1), (char ) (eaf + 1),
	314	bufsize - sizeof(struct ext2_inode) -
c844010c	315	extra_isize - sizeof(__u32), 0);
7331196a	316
1e3472c5	317	}
7331196a TT	318
	319	void ext2fs_swap_inode(ext2_filsys fs, struct ext2_inode *t,
	320	struct ext2_inode *f, int hostorder)
	321	{
	322	ext2fs_swap_inode_full(fs, (struct ext2_inode_large *) t,
	323	(struct ext2_inode_large *) f, hostorder,
	324	sizeof(struct ext2_inode));
	325	}
	326
5df55d7f	327	#endif