1 files changed, 101 insertions, 0 deletions
diff --git a/fs/btrfs/block-rsv.h b/fs/btrfs/block-rsv.h
new file mode 100644
index 000000000000..d1428bb73fc5
--- /dev/null
+++ b/fs/btrfs/block-rsv.h
@@ -0,0 +1,101 @@
+/* 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 */

diff --git a/fs/btrfs/block-rsv.h b/fs/btrfs/block-rsv.h new file mode 100644 index 000000000000..d1428bb73fc5 --- /dev/null +++ b/fs/btrfs/block-rsv.h
@@ -0,0 +1,101 @@
	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	struct btrfs_block_rsv btrfs_alloc_block_rsv(struct btrfs_fs_info fs_info,
	54	unsigned short type);
	55	void btrfs_init_metadata_block_rsv(struct btrfs_fs_info *fs_info,
	56	struct btrfs_block_rsv *rsv,
	57	unsigned short type);
	58	void btrfs_free_block_rsv(struct btrfs_fs_info *fs_info,
	59	struct btrfs_block_rsv *rsv);
	60	int btrfs_block_rsv_add(struct btrfs_root *root,
	61	struct btrfs_block_rsv *block_rsv, u64 num_bytes,
	62	enum btrfs_reserve_flush_enum flush);
	63	int btrfs_block_rsv_check(struct btrfs_block_rsv *block_rsv, int min_factor);
	64	int btrfs_block_rsv_refill(struct btrfs_root *root,
	65	struct btrfs_block_rsv *block_rsv, u64 min_reserved,
	66	enum btrfs_reserve_flush_enum flush);
	67	int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv,
	68	struct btrfs_block_rsv *dst_rsv, u64 num_bytes,
	69	bool update_size);
	70	int btrfs_block_rsv_use_bytes(struct btrfs_block_rsv *block_rsv, u64 num_bytes);
	71	int btrfs_cond_migrate_bytes(struct btrfs_fs_info *fs_info,
	72	struct btrfs_block_rsv *dest, u64 num_bytes,
	73	int min_factor);
	74	void btrfs_block_rsv_add_bytes(struct btrfs_block_rsv *block_rsv,
	75	u64 num_bytes, bool update_size);
	76	u64 __btrfs_block_rsv_release(struct btrfs_fs_info *fs_info,
	77	struct btrfs_block_rsv *block_rsv,
	78	u64 num_bytes, u64 *qgroup_to_release);
	79	void btrfs_update_global_block_rsv(struct btrfs_fs_info *fs_info);
	80	void btrfs_init_global_block_rsv(struct btrfs_fs_info *fs_info);
	81	void btrfs_release_global_block_rsv(struct btrfs_fs_info *fs_info);
	82	struct btrfs_block_rsv btrfs_use_block_rsv(struct btrfs_trans_handle trans,
	83	struct btrfs_root *root,
	84	u32 blocksize);
	85
	86	static inline void btrfs_block_rsv_release(struct btrfs_fs_info *fs_info,
	87	struct btrfs_block_rsv *block_rsv,
	88	u64 num_bytes)
	89	{
	90	__btrfs_block_rsv_release(fs_info, block_rsv, num_bytes, NULL);
	91	}
	92
	93	static inline void btrfs_unuse_block_rsv(struct btrfs_fs_info *fs_info,
	94	struct btrfs_block_rsv *block_rsv,
	95	u32 blocksize)
	96	{
	97	btrfs_block_rsv_add_bytes(block_rsv, blocksize, false);
	98	btrfs_block_rsv_release(fs_info, block_rsv, 0);
	99	}
	100
	101	#endif /* BTRFS_BLOCK_RSV_H */