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93 lines
3.1 KiB
93 lines
3.1 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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#ifndef BTRFS_BLOCK_RSV_H |
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#define BTRFS_BLOCK_RSV_H |
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struct btrfs_trans_handle; |
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enum btrfs_reserve_flush_enum; |
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/* |
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* Types of block reserves |
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*/ |
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enum { |
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BTRFS_BLOCK_RSV_GLOBAL, |
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BTRFS_BLOCK_RSV_DELALLOC, |
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BTRFS_BLOCK_RSV_TRANS, |
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BTRFS_BLOCK_RSV_CHUNK, |
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BTRFS_BLOCK_RSV_DELOPS, |
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BTRFS_BLOCK_RSV_DELREFS, |
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BTRFS_BLOCK_RSV_EMPTY, |
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BTRFS_BLOCK_RSV_TEMP, |
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}; |
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struct btrfs_block_rsv { |
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u64 size; |
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u64 reserved; |
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struct btrfs_space_info *space_info; |
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spinlock_t lock; |
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unsigned short full; |
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unsigned short type; |
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unsigned short failfast; |
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/* |
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* Qgroup equivalent for @size @reserved |
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* |
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* Unlike normal @size/@reserved for inode rsv, qgroup doesn't care |
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* about things like csum size nor how many tree blocks it will need to |
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* reserve. |
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* |
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* Qgroup cares more about net change of the extent usage. |
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* |
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* So for one newly inserted file extent, in worst case it will cause |
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* leaf split and level increase, nodesize for each file extent is |
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* already too much. |
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* |
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* In short, qgroup_size/reserved is the upper limit of possible needed |
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* qgroup metadata reservation. |
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*/ |
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u64 qgroup_rsv_size; |
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u64 qgroup_rsv_reserved; |
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}; |
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void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv, unsigned short type); |
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struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_fs_info *fs_info, |
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unsigned short type); |
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void btrfs_init_metadata_block_rsv(struct btrfs_fs_info *fs_info, |
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struct btrfs_block_rsv *rsv, |
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unsigned short type); |
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void btrfs_free_block_rsv(struct btrfs_fs_info *fs_info, |
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struct btrfs_block_rsv *rsv); |
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int btrfs_block_rsv_add(struct btrfs_root *root, |
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struct btrfs_block_rsv *block_rsv, u64 num_bytes, |
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enum btrfs_reserve_flush_enum flush); |
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int btrfs_block_rsv_check(struct btrfs_block_rsv *block_rsv, int min_factor); |
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int btrfs_block_rsv_refill(struct btrfs_root *root, |
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struct btrfs_block_rsv *block_rsv, u64 min_reserved, |
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enum btrfs_reserve_flush_enum flush); |
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int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv, |
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struct btrfs_block_rsv *dst_rsv, u64 num_bytes, |
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bool update_size); |
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int btrfs_block_rsv_use_bytes(struct btrfs_block_rsv *block_rsv, u64 num_bytes); |
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int btrfs_cond_migrate_bytes(struct btrfs_fs_info *fs_info, |
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struct btrfs_block_rsv *dest, u64 num_bytes, |
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int min_factor); |
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void btrfs_block_rsv_add_bytes(struct btrfs_block_rsv *block_rsv, |
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u64 num_bytes, bool update_size); |
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u64 btrfs_block_rsv_release(struct btrfs_fs_info *fs_info, |
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struct btrfs_block_rsv *block_rsv, |
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u64 num_bytes, u64 *qgroup_to_release); |
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void btrfs_update_global_block_rsv(struct btrfs_fs_info *fs_info); |
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void btrfs_init_global_block_rsv(struct btrfs_fs_info *fs_info); |
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void btrfs_release_global_block_rsv(struct btrfs_fs_info *fs_info); |
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struct btrfs_block_rsv *btrfs_use_block_rsv(struct btrfs_trans_handle *trans, |
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struct btrfs_root *root, |
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u32 blocksize); |
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static inline void btrfs_unuse_block_rsv(struct btrfs_fs_info *fs_info, |
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struct btrfs_block_rsv *block_rsv, |
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u32 blocksize) |
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{ |
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btrfs_block_rsv_add_bytes(block_rsv, blocksize, false); |
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btrfs_block_rsv_release(fs_info, block_rsv, 0, NULL); |
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} |
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#endif /* BTRFS_BLOCK_RSV_H */
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