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Commit b558f0cc authored by Jaegeuk Kim's avatar Jaegeuk Kim Committed by Daniel Rosenberg
Browse files

BACKPORT: f2fs: expose # of overprivision segments 



This is useful when checking conditions during checkpoint=disable in Android.

Bug: 330501081
Reviewed-by: default avatarChao Yu <yuchao0@huawei.com>
Signed-off-by: default avatarJaegeuk Kim <jaegeuk@kernel.org>
(cherry picked from commit ed5309ad137e1f467ca1e1b61be3dc39d144316c)
[hakan: Resolved minor conflict in Documentation/ABI/testing/sysfs-fs-f2fs]
Signed-off-by: default avatarHåkan Kvist <hakan.kvist@sony.com>
Change-Id: I0bd59501836fbe8fe361da2872ae660f3ac1f541
parent ffb0cc52

Documentation/ABI/testing/sysfs-fs-f2fs

+5 −0
Original line number Diff line number Diff line
@@ -347,3 +347,8 @@ Date: April 2020 
Contact:	"Daeho Jeong" <daehojeong@google.com>

Description:	Give a way to change iostat_period time. 3secs by default.

		The new iostat trace gives stats gap given the period.



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

Date:		March 2021

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

Description:	Shows the number of overprovision segments.

fs/f2fs/sysfs.c

+9 −0
Original line number Diff line number Diff line
@@ -87,6 +87,13 @@ static ssize_t free_segments_show(struct f2fs_attr *a, 
			(unsigned long long)(free_segments(sbi)));

}



static ssize_t ovp_segments_show(struct f2fs_attr *a,

		struct f2fs_sb_info *sbi, char *buf)

{

	return sprintf(buf, "%llu\n",

			(unsigned long long)(overprovision_segments(sbi)));

}



static ssize_t lifetime_write_kbytes_show(struct f2fs_attr *a,

		struct f2fs_sb_info *sbi, char *buf)

{
@@ -570,6 +577,7 @@ F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, data_io_flag, data_io_flag); 
F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, node_io_flag, node_io_flag);

F2FS_GENERAL_RO_ATTR(dirty_segments);

F2FS_GENERAL_RO_ATTR(free_segments);

F2FS_GENERAL_RO_ATTR(ovp_segments);

F2FS_GENERAL_RO_ATTR(lifetime_write_kbytes);

F2FS_GENERAL_RO_ATTR(features);

F2FS_GENERAL_RO_ATTR(current_reserved_blocks);
@@ -659,6 +667,7 @@ static struct attribute *f2fs_attrs[] = { 
	ATTR_LIST(node_io_flag),

	ATTR_LIST(dirty_segments),

	ATTR_LIST(free_segments),

	ATTR_LIST(ovp_segments),

	ATTR_LIST(unusable),

	ATTR_LIST(lifetime_write_kbytes),

	ATTR_LIST(features),