forked from luck/tmp_suning_uos_patched
63f018be57
Currently the non-prefixed version is a simple wrapper used to hide the 4th argument of the prefixed version. This doesn't bring much value in practice and only makes the code harder to follow by adding another level of indirection. Rectify this by removing the __ prefix and have only one public function to release bytes from a block reservation. No semantic changes. Signed-off-by: Nikolay Borisov <nborisov@suse.com> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
94 lines
3.1 KiB
C
94 lines
3.1 KiB
C
/* 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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