134 строки
4.9 KiB
C
134 строки
4.9 KiB
C
/*
|
|
* Copyright (C) 2009 Oracle. All rights reserved.
|
|
*
|
|
* 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_FREE_SPACE_CACHE
|
|
#define __BTRFS_FREE_SPACE_CACHE
|
|
|
|
struct btrfs_free_space {
|
|
struct rb_node offset_index;
|
|
u64 offset;
|
|
u64 bytes;
|
|
unsigned long *bitmap;
|
|
struct list_head list;
|
|
};
|
|
|
|
struct btrfs_free_space_ctl {
|
|
spinlock_t tree_lock;
|
|
struct rb_root free_space_offset;
|
|
u64 free_space;
|
|
int extents_thresh;
|
|
int free_extents;
|
|
int total_bitmaps;
|
|
int unit;
|
|
u64 start;
|
|
struct btrfs_free_space_op *op;
|
|
void *private;
|
|
struct mutex cache_writeout_mutex;
|
|
struct list_head trimming_ranges;
|
|
};
|
|
|
|
struct btrfs_free_space_op {
|
|
void (*recalc_thresholds)(struct btrfs_free_space_ctl *ctl);
|
|
bool (*use_bitmap)(struct btrfs_free_space_ctl *ctl,
|
|
struct btrfs_free_space *info);
|
|
};
|
|
|
|
struct btrfs_io_ctl;
|
|
|
|
struct inode *lookup_free_space_inode(struct btrfs_root *root,
|
|
struct btrfs_block_group_cache
|
|
*block_group, struct btrfs_path *path);
|
|
int create_free_space_inode(struct btrfs_root *root,
|
|
struct btrfs_trans_handle *trans,
|
|
struct btrfs_block_group_cache *block_group,
|
|
struct btrfs_path *path);
|
|
|
|
int btrfs_check_trunc_cache_free_space(struct btrfs_root *root,
|
|
struct btrfs_block_rsv *rsv);
|
|
int btrfs_truncate_free_space_cache(struct btrfs_root *root,
|
|
struct btrfs_trans_handle *trans,
|
|
struct btrfs_block_group_cache *block_group,
|
|
struct inode *inode);
|
|
int load_free_space_cache(struct btrfs_fs_info *fs_info,
|
|
struct btrfs_block_group_cache *block_group);
|
|
int btrfs_wait_cache_io(struct btrfs_root *root,
|
|
struct btrfs_trans_handle *trans,
|
|
struct btrfs_block_group_cache *block_group,
|
|
struct btrfs_io_ctl *io_ctl,
|
|
struct btrfs_path *path, u64 offset);
|
|
int btrfs_write_out_cache(struct btrfs_root *root,
|
|
struct btrfs_trans_handle *trans,
|
|
struct btrfs_block_group_cache *block_group,
|
|
struct btrfs_path *path);
|
|
struct inode *lookup_free_ino_inode(struct btrfs_root *root,
|
|
struct btrfs_path *path);
|
|
int create_free_ino_inode(struct btrfs_root *root,
|
|
struct btrfs_trans_handle *trans,
|
|
struct btrfs_path *path);
|
|
int load_free_ino_cache(struct btrfs_fs_info *fs_info,
|
|
struct btrfs_root *root);
|
|
int btrfs_write_out_ino_cache(struct btrfs_root *root,
|
|
struct btrfs_trans_handle *trans,
|
|
struct btrfs_path *path,
|
|
struct inode *inode);
|
|
|
|
void btrfs_init_free_space_ctl(struct btrfs_block_group_cache *block_group);
|
|
int __btrfs_add_free_space(struct btrfs_free_space_ctl *ctl,
|
|
u64 bytenr, u64 size);
|
|
static inline int
|
|
btrfs_add_free_space(struct btrfs_block_group_cache *block_group,
|
|
u64 bytenr, u64 size)
|
|
{
|
|
return __btrfs_add_free_space(block_group->free_space_ctl,
|
|
bytenr, size);
|
|
}
|
|
int btrfs_remove_free_space(struct btrfs_block_group_cache *block_group,
|
|
u64 bytenr, u64 size);
|
|
void __btrfs_remove_free_space_cache(struct btrfs_free_space_ctl *ctl);
|
|
void btrfs_remove_free_space_cache(struct btrfs_block_group_cache
|
|
*block_group);
|
|
u64 btrfs_find_space_for_alloc(struct btrfs_block_group_cache *block_group,
|
|
u64 offset, u64 bytes, u64 empty_size,
|
|
u64 *max_extent_size);
|
|
u64 btrfs_find_ino_for_alloc(struct btrfs_root *fs_root);
|
|
void btrfs_dump_free_space(struct btrfs_block_group_cache *block_group,
|
|
u64 bytes);
|
|
int btrfs_find_space_cluster(struct btrfs_root *root,
|
|
struct btrfs_block_group_cache *block_group,
|
|
struct btrfs_free_cluster *cluster,
|
|
u64 offset, u64 bytes, u64 empty_size);
|
|
void btrfs_init_free_cluster(struct btrfs_free_cluster *cluster);
|
|
u64 btrfs_alloc_from_cluster(struct btrfs_block_group_cache *block_group,
|
|
struct btrfs_free_cluster *cluster, u64 bytes,
|
|
u64 min_start, u64 *max_extent_size);
|
|
int btrfs_return_cluster_to_free_space(
|
|
struct btrfs_block_group_cache *block_group,
|
|
struct btrfs_free_cluster *cluster);
|
|
int btrfs_trim_block_group(struct btrfs_block_group_cache *block_group,
|
|
u64 *trimmed, u64 start, u64 end, u64 minlen);
|
|
|
|
/* Support functions for runnint our sanity tests */
|
|
#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
|
|
int test_add_free_space_entry(struct btrfs_block_group_cache *cache,
|
|
u64 offset, u64 bytes, bool bitmap);
|
|
int test_check_exists(struct btrfs_block_group_cache *cache,
|
|
u64 offset, u64 bytes);
|
|
#endif
|
|
|
|
#endif
|