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