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152 lines
5.2 KiB
152 lines
5.2 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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/* |
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* Copyright (C) 2009 Oracle. All rights reserved. |
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*/ |
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#ifndef BTRFS_FREE_SPACE_CACHE_H |
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#define BTRFS_FREE_SPACE_CACHE_H |
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/* |
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* This is the trim state of an extent or bitmap. |
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* |
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* BTRFS_TRIM_STATE_TRIMMING is special and used to maintain the state of a |
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* bitmap as we may need several trims to fully trim a single bitmap entry. |
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* This is reset should any free space other than trimmed space be added to the |
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* bitmap. |
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*/ |
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enum btrfs_trim_state { |
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BTRFS_TRIM_STATE_UNTRIMMED, |
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BTRFS_TRIM_STATE_TRIMMED, |
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BTRFS_TRIM_STATE_TRIMMING, |
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}; |
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struct btrfs_free_space { |
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struct rb_node offset_index; |
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u64 offset; |
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u64 bytes; |
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u64 max_extent_size; |
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unsigned long *bitmap; |
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struct list_head list; |
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enum btrfs_trim_state trim_state; |
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s32 bitmap_extents; |
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}; |
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static inline bool btrfs_free_space_trimmed(struct btrfs_free_space *info) |
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{ |
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return (info->trim_state == BTRFS_TRIM_STATE_TRIMMED); |
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} |
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static inline bool btrfs_free_space_trimming_bitmap( |
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struct btrfs_free_space *info) |
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{ |
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return (info->trim_state == BTRFS_TRIM_STATE_TRIMMING); |
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} |
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struct btrfs_free_space_ctl { |
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spinlock_t tree_lock; |
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struct rb_root free_space_offset; |
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u64 free_space; |
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int extents_thresh; |
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int free_extents; |
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int total_bitmaps; |
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int unit; |
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u64 start; |
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s32 discardable_extents[BTRFS_STAT_NR_ENTRIES]; |
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s64 discardable_bytes[BTRFS_STAT_NR_ENTRIES]; |
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const struct btrfs_free_space_op *op; |
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void *private; |
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struct mutex cache_writeout_mutex; |
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struct list_head trimming_ranges; |
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}; |
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struct btrfs_free_space_op { |
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bool (*use_bitmap)(struct btrfs_free_space_ctl *ctl, |
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struct btrfs_free_space *info); |
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}; |
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struct btrfs_io_ctl { |
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void *cur, *orig; |
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struct page *page; |
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struct page **pages; |
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struct btrfs_fs_info *fs_info; |
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struct inode *inode; |
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unsigned long size; |
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int index; |
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int num_pages; |
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int entries; |
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int bitmaps; |
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}; |
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struct inode *lookup_free_space_inode(struct btrfs_block_group *block_group, |
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struct btrfs_path *path); |
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int create_free_space_inode(struct btrfs_trans_handle *trans, |
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struct btrfs_block_group *block_group, |
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struct btrfs_path *path); |
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int btrfs_remove_free_space_inode(struct btrfs_trans_handle *trans, |
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struct inode *inode, |
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struct btrfs_block_group *block_group); |
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int btrfs_check_trunc_cache_free_space(struct btrfs_fs_info *fs_info, |
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struct btrfs_block_rsv *rsv); |
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int btrfs_truncate_free_space_cache(struct btrfs_trans_handle *trans, |
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struct btrfs_block_group *block_group, |
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struct inode *inode); |
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int load_free_space_cache(struct btrfs_block_group *block_group); |
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int btrfs_wait_cache_io(struct btrfs_trans_handle *trans, |
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struct btrfs_block_group *block_group, |
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struct btrfs_path *path); |
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int btrfs_write_out_cache(struct btrfs_trans_handle *trans, |
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struct btrfs_block_group *block_group, |
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struct btrfs_path *path); |
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void btrfs_init_free_space_ctl(struct btrfs_block_group *block_group, |
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struct btrfs_free_space_ctl *ctl); |
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int __btrfs_add_free_space(struct btrfs_fs_info *fs_info, |
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struct btrfs_free_space_ctl *ctl, |
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u64 bytenr, u64 size, |
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enum btrfs_trim_state trim_state); |
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int btrfs_add_free_space(struct btrfs_block_group *block_group, |
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u64 bytenr, u64 size); |
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int btrfs_add_free_space_unused(struct btrfs_block_group *block_group, |
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u64 bytenr, u64 size); |
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int btrfs_add_free_space_async_trimmed(struct btrfs_block_group *block_group, |
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u64 bytenr, u64 size); |
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int btrfs_remove_free_space(struct btrfs_block_group *block_group, |
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u64 bytenr, u64 size); |
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void __btrfs_remove_free_space_cache(struct btrfs_free_space_ctl *ctl); |
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void btrfs_remove_free_space_cache(struct btrfs_block_group *block_group); |
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bool btrfs_is_free_space_trimmed(struct btrfs_block_group *block_group); |
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u64 btrfs_find_space_for_alloc(struct btrfs_block_group *block_group, |
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u64 offset, u64 bytes, u64 empty_size, |
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u64 *max_extent_size); |
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void btrfs_dump_free_space(struct btrfs_block_group *block_group, |
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u64 bytes); |
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int btrfs_find_space_cluster(struct btrfs_block_group *block_group, |
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struct btrfs_free_cluster *cluster, |
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u64 offset, u64 bytes, u64 empty_size); |
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void btrfs_init_free_cluster(struct btrfs_free_cluster *cluster); |
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u64 btrfs_alloc_from_cluster(struct btrfs_block_group *block_group, |
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struct btrfs_free_cluster *cluster, u64 bytes, |
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u64 min_start, u64 *max_extent_size); |
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void btrfs_return_cluster_to_free_space( |
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struct btrfs_block_group *block_group, |
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struct btrfs_free_cluster *cluster); |
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int btrfs_trim_block_group(struct btrfs_block_group *block_group, |
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u64 *trimmed, u64 start, u64 end, u64 minlen); |
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int btrfs_trim_block_group_extents(struct btrfs_block_group *block_group, |
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u64 *trimmed, u64 start, u64 end, u64 minlen, |
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bool async); |
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int btrfs_trim_block_group_bitmaps(struct btrfs_block_group *block_group, |
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u64 *trimmed, u64 start, u64 end, u64 minlen, |
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u64 maxlen, bool async); |
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bool btrfs_free_space_cache_v1_active(struct btrfs_fs_info *fs_info); |
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int btrfs_set_free_space_cache_v1_active(struct btrfs_fs_info *fs_info, bool active); |
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/* Support functions for running our sanity tests */ |
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#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS |
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int test_add_free_space_entry(struct btrfs_block_group *cache, |
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u64 offset, u64 bytes, bool bitmap); |
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int test_check_exists(struct btrfs_block_group *cache, u64 offset, u64 bytes); |
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#endif |
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#endif
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