btrfs: extent_io: Introduce needed structure for recoding set/clear bits (ac467772) · Commits · e / devices / android_kernel_fairphone_FP5

Add a new structure, extent_change_set, to record how many bytes are changed in one set/clear_extent_bits() operation, with detailed changed ranges info. This provides the needed facilities for later qgroup reserve framework. Signed-off-by:

Qu Wenruo <quwenruo@cn.fujitsu.com> Signed-off-by:

Chris Mason <clm@fb.com>

fs/btrfs/extent_io.h

+12 −0

Original line number	Diff line number	Diff line
		@@ -2,6 +2,7 @@
		#define __EXTENTIO__

		#include <linux/rbtree.h>
		#include "ulist.h"

		/* bits for the extent state */
		#define EXTENT_DIRTY (1U << 0)
		@@ -161,6 +162,17 @@ struct extent_buffer {
		#endif
		};

		/*
		* Structure to record how many bytes and which ranges are set/cleared
		*/
		struct extent_changeset {
		/* How many bytes are set/cleared in this operation */
		u64 bytes_changed;

		/* Changed ranges */
		struct ulist *range_changed;
		};

		static inline void extent_set_compress_type(unsigned long *bio_flags,
		int compress_type)
		{