1 /* SPDX-License-Identifier: GPL-2.0 */ 2 3 #ifndef BTRFS_BLOCK_RSV_H 4 #define BTRFS_BLOCK_RSV_H 5 6 struct btrfs_trans_handle; 7 enum btrfs_reserve_flush_enum; 8 9 /* 10 * Types of block reserves 11 */ 12 enum { 13 BTRFS_BLOCK_RSV_GLOBAL, 14 BTRFS_BLOCK_RSV_DELALLOC, 15 BTRFS_BLOCK_RSV_TRANS, 16 BTRFS_BLOCK_RSV_CHUNK, 17 BTRFS_BLOCK_RSV_DELOPS, 18 BTRFS_BLOCK_RSV_DELREFS, 19 BTRFS_BLOCK_RSV_EMPTY, 20 BTRFS_BLOCK_RSV_TEMP, 21 }; 22 23 struct btrfs_block_rsv { 24 u64 size; 25 u64 reserved; 26 struct btrfs_space_info *space_info; 27 spinlock_t lock; 28 unsigned short full; 29 unsigned short type; 30 unsigned short failfast; 31 32 /* 33 * Qgroup equivalent for @size @reserved 34 * 35 * Unlike normal @size/@reserved for inode rsv, qgroup doesn't care 36 * about things like csum size nor how many tree blocks it will need to 37 * reserve. 38 * 39 * Qgroup cares more about net change of the extent usage. 40 * 41 * So for one newly inserted file extent, in worst case it will cause 42 * leaf split and level increase, nodesize for each file extent is 43 * already too much. 44 * 45 * In short, qgroup_size/reserved is the upper limit of possible needed 46 * qgroup metadata reservation. 47 */ 48 u64 qgroup_rsv_size; 49 u64 qgroup_rsv_reserved; 50 }; 51 52 void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv, unsigned short type); 53 void btrfs_init_root_block_rsv(struct btrfs_root *root); 54 struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_fs_info *fs_info, 55 unsigned short type); 56 void btrfs_init_metadata_block_rsv(struct btrfs_fs_info *fs_info, 57 struct btrfs_block_rsv *rsv, 58 unsigned short type); 59 void btrfs_free_block_rsv(struct btrfs_fs_info *fs_info, 60 struct btrfs_block_rsv *rsv); 61 int btrfs_block_rsv_add(struct btrfs_fs_info *fs_info, 62 struct btrfs_block_rsv *block_rsv, u64 num_bytes, 63 enum btrfs_reserve_flush_enum flush); 64 int btrfs_block_rsv_check(struct btrfs_block_rsv *block_rsv, int min_factor); 65 int btrfs_block_rsv_refill(struct btrfs_fs_info *fs_info, 66 struct btrfs_block_rsv *block_rsv, u64 min_reserved, 67 enum btrfs_reserve_flush_enum flush); 68 int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv, 69 struct btrfs_block_rsv *dst_rsv, u64 num_bytes, 70 bool update_size); 71 int btrfs_block_rsv_use_bytes(struct btrfs_block_rsv *block_rsv, u64 num_bytes); 72 int btrfs_cond_migrate_bytes(struct btrfs_fs_info *fs_info, 73 struct btrfs_block_rsv *dest, u64 num_bytes, 74 int min_factor); 75 void btrfs_block_rsv_add_bytes(struct btrfs_block_rsv *block_rsv, 76 u64 num_bytes, bool update_size); 77 u64 btrfs_block_rsv_release(struct btrfs_fs_info *fs_info, 78 struct btrfs_block_rsv *block_rsv, 79 u64 num_bytes, u64 *qgroup_to_release); 80 void btrfs_update_global_block_rsv(struct btrfs_fs_info *fs_info); 81 void btrfs_init_global_block_rsv(struct btrfs_fs_info *fs_info); 82 void btrfs_release_global_block_rsv(struct btrfs_fs_info *fs_info); 83 struct btrfs_block_rsv *btrfs_use_block_rsv(struct btrfs_trans_handle *trans, 84 struct btrfs_root *root, 85 u32 blocksize); 86 static inline void btrfs_unuse_block_rsv(struct btrfs_fs_info *fs_info, 87 struct btrfs_block_rsv *block_rsv, 88 u32 blocksize) 89 { 90 btrfs_block_rsv_add_bytes(block_rsv, blocksize, false); 91 btrfs_block_rsv_release(fs_info, block_rsv, 0, NULL); 92 } 93 94 #endif /* BTRFS_BLOCK_RSV_H */ 95