Commit 8e0f54a7 authored by Jaegeuk Kim's avatar Jaegeuk Kim
Browse files

f2fs: add a sysfs entry to show zone capacity 



This patch adds a sysfs entry showing the unusable space in a section
made by zone capacity.

Reviewed-by: default avatarChao Yu <chao@kernel.org>
Signed-off-by: default avatarJaegeuk Kim <jaegeuk@kernel.org>
parent 074b5ea2

Documentation/ABI/testing/sysfs-fs-f2fs

+6 −0
Original line number Diff line number Diff line
@@ -580,3 +580,9 @@ Date: January 2022 
Contact:	"Jaegeuk Kim" <jaegeuk@kernel.org>

Description:	Controls max # of node block writes to be used for roll forward

		recovery. This can limit the roll forward recovery time.



What:		/sys/fs/f2fs/<disk>/unusable_blocks_per_sec

Date:		June 2022

Contact:	"Jaegeuk Kim" <jaegeuk@kernel.org>

Description:	Shows the number of unusable blocks in a section which was defined by

		the zone capacity reported by underlying zoned device.

fs/f2fs/sysfs.c

+10 −0
Original line number Diff line number Diff line
@@ -713,6 +713,11 @@ static struct f2fs_attr f2fs_attr_##_name = { \ 
	.offset = _offset					\

}



#define F2FS_RO_ATTR(struct_type, struct_name, name, elname)	\

	F2FS_ATTR_OFFSET(struct_type, name, 0444,		\

		f2fs_sbi_show, NULL,				\

		offsetof(struct struct_name, elname))



#define F2FS_RW_ATTR(struct_type, struct_name, name, elname)	\

	F2FS_ATTR_OFFSET(struct_type, name, 0644,		\

		f2fs_sbi_show, f2fs_sbi_store,			\
@@ -811,6 +816,8 @@ F2FS_FEATURE_RO_ATTR(encrypted_casefold); 
#endif /* CONFIG_FS_ENCRYPTION */

#ifdef CONFIG_BLK_DEV_ZONED

F2FS_FEATURE_RO_ATTR(block_zoned);

F2FS_RO_ATTR(F2FS_SBI, f2fs_sb_info, unusable_blocks_per_sec,

					unusable_blocks_per_sec);

#endif

F2FS_FEATURE_RO_ATTR(atomic_write);

F2FS_FEATURE_RO_ATTR(extra_attr);
@@ -919,6 +926,9 @@ static struct attribute *f2fs_attrs[] = { 
	ATTR_LIST(moved_blocks_background),

	ATTR_LIST(avg_vblocks),

#endif

#ifdef CONFIG_BLK_DEV_ZONED

	ATTR_LIST(unusable_blocks_per_sec),

#endif

#ifdef CONFIG_F2FS_FS_COMPRESSION

	ATTR_LIST(compr_written_block),

	ATTR_LIST(compr_saved_block),