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/*
* Copyright (C) 2013 FUJITSU LIMITED. All rights reserved.
* Written by Miao Xie <miaox@cn.fujitsu.com>
*
* 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.
*/
#ifndef __BTRFS_CHECK_H__
#define __BTRFS_CHECK_H__
#if BTRFS_FLAT_INCLUDES
#include "kerncompat.h"
#include "ctree.h"
#include "extent-cache.h"
#include "list.h"
#else
#include <btrfs/kerncompat.h>
#include <btrfs/ctree.h>
#include <btrfs/extent-cache.h>
#include <btrfs/list.h>
#endif /* BTRFS_FLAT_INCLUDES */
struct block_group_record {
struct cache_extent cache;
/* Used to identify the orphan block groups */
struct list_head list;
u64 generation;
u64 objectid;
u8 type;
u64 offset;
u64 flags;
};
struct block_group_tree {
struct cache_tree tree;
struct list_head block_groups;
};
struct device_record {
struct rb_node node;
u64 devid;
u64 generation;
u64 objectid;
u8 type;
u64 offset;
u64 total_byte;
u64 byte_used;
u64 real_used;
};
struct stripe {
u64 devid;
u64 offset;
u8 dev_uuid[BTRFS_UUID_SIZE];
};
struct chunk_record {
struct cache_extent cache;
struct list_head list;
struct list_head dextents;
struct block_group_record *bg_rec;
u64 generation;
u64 objectid;
u8 type;
u64 offset;
u64 owner;
u64 length;
u64 type_flags;
u64 stripe_len;
u16 num_stripes;
u16 sub_stripes;
u32 io_align;
u32 io_width;
u32 sector_size;
struct stripe stripes[0];
};
struct device_extent_record {
struct cache_extent cache;
/*
* Used to identify the orphan device extents (the device extents
* don't belong to a chunk or a device)
*/
struct list_head chunk_list;
struct list_head device_list;
u64 generation;
u64 objectid;
u8 type;
u64 offset;
u64 chunk_objecteid;
u64 chunk_offset;
u64 length;
};
struct device_extent_tree {
struct cache_tree tree;
/*
* The idea is:
* When checking the chunk information, we move the device extents
* that has its chunk to the chunk's device extents list. After the
* check, if there are still some device extents in no_chunk_orphans,
* it means there are some device extents which don't belong to any
* chunk.
*
* The usage of no_device_orphans is the same as the first one, but it
* is for the device information check.
*/
struct list_head no_chunk_orphans;
struct list_head no_device_orphans;
};
static inline unsigned long btrfs_chunk_record_size(int num_stripes)
{
return sizeof(struct chunk_record) +
sizeof(struct stripe) * num_stripes;
}
void free_chunk_cache_tree(struct cache_tree *chunk_cache);
/*
* Function to check validation for num_stripes, or it can call
* float point error for 0 division
* return < 0 for invalid combination
* return 0 for valid combination
*/
static inline int check_num_stripes(u64 type, int num_stripes)
{
if (num_stripes == 0)
return -1;
if (type & BTRFS_BLOCK_GROUP_RAID5 && num_stripes <= 1)
return -1;
if (type & BTRFS_BLOCK_GROUP_RAID6 && num_stripes <= 2)
return -1;
return 0;
}
u64 calc_stripe_length(u64 type, u64 length, int num_stripes);
/* For block group tree */
static inline void block_group_tree_init(struct block_group_tree *tree)
{
cache_tree_init(&tree->tree);
INIT_LIST_HEAD(&tree->block_groups);
}
int insert_block_group_record(struct block_group_tree *tree,
struct block_group_record *bg_rec);
void free_block_group_tree(struct block_group_tree *tree);
/* For device extent tree */
static inline void device_extent_tree_init(struct device_extent_tree *tree)
{
cache_tree_init(&tree->tree);
INIT_LIST_HEAD(&tree->no_chunk_orphans);
INIT_LIST_HEAD(&tree->no_device_orphans);
}
int insert_device_extent_record(struct device_extent_tree *tree,
struct device_extent_record *de_rec);
void free_device_extent_tree(struct device_extent_tree *tree);
/* Create various in-memory record by on-disk data */
struct chunk_record *btrfs_new_chunk_record(struct extent_buffer *leaf,
struct btrfs_key *key,
int slot);
struct block_group_record *
btrfs_new_block_group_record(struct extent_buffer *leaf, struct btrfs_key *key,
int slot);
struct device_extent_record *
btrfs_new_device_extent_record(struct extent_buffer *leaf,
struct btrfs_key *key, int slot);
int check_chunks(struct cache_tree *chunk_cache,
struct block_group_tree *block_group_cache,
struct device_extent_tree *dev_extent_cache,
struct list_head *good, struct list_head *bad,
struct list_head *rebuild, int silent);
#endif
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