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/*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public
* License v2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public
* License along with this program; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 021110-1307, USA.
*/
/*
* Defines and function declarations for users of the mkfs API, no internal
* definitions.
*/
#ifndef __BTRFS_CONVERT_COMMON_H__
#define __BTRFS_CONVERT_COMMON_H__
#include "kerncompat.h"
#include "kernel-shared/uapi/btrfs_tree.h"
#include "common/extent-cache.h"
struct btrfs_mkfs_config;
#define SOURCE_FS_UUID_SIZE (16)
struct btrfs_convert_context {
u32 blocksize;
u64 first_data_block;
u64 block_count;
u64 inodes_count;
u64 free_inodes_count;
u64 total_bytes;
u64 free_bytes_initial;
char *label;
u8 fs_uuid[SOURCE_FS_UUID_SIZE];
const struct btrfs_convert_operations *convert_ops;
/* The accurate used space of old filesystem */
struct cache_tree used_space;
/* Batched ranges which must be covered by data chunks */
struct cache_tree data_chunks;
/* Free space which is not covered by data_chunks */
struct cache_tree free_space;
/*
* Free space reserved for ENOSPC report, it's just a copy free_space.
* But after initial calculation, free_space_initial is no longer
* updated, so we have a good idea on how much free space we really
* have for btrfs.
*/
struct cache_tree free_space_initial;
void *fs_data;
};
int make_convert_btrfs(int fd, struct btrfs_mkfs_config *cfg,
struct btrfs_convert_context *cctx);
/*
* Represents a simple contiguous range.
*
* For multiple or non-contiguous ranges, use extent_cache_tree from
* extent-cache.c
*/
struct simple_range {
u64 start;
u64 len;
};
/*
* Simple range functions
*/
/* Get range end (exclusive) */
static inline u64 range_end(const struct simple_range *range)
{
return (range->start + range->len);
}
int btrfs_convert_file_extent(struct btrfs_trans_handle *trans,
struct btrfs_root *root, u64 objectid,
struct btrfs_inode_item *inode,
u64 file_pos, u64 disk_bytenr,
u64 num_bytes);
#endif
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