Commit 08234279 authored by Jaegeuk Kim's avatar Jaegeuk Kim
Browse files

f2fs: expose # of overprivision segments 



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

Reviewed-by: default avatarChao Yu <yuchao0@huawei.com>
Signed-off-by: default avatarJaegeuk Kim <jaegeuk@kernel.org>
parent 3c031542

Documentation/ABI/testing/sysfs-fs-f2fs

+5 −0
Original line number Diff line number Diff line
@@ -409,3 +409,8 @@ Description: Give a way to change checkpoint merge daemon's io priority. 
		I/O priority "3". We can select the class between "rt" and "be",

		and set the I/O priority within valid range of it. "," delimiter

		is necessary in between I/O class and priority number.



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
@@ -91,6 +91,13 @@ 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)

{
@@ -629,6 +636,7 @@ F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, node_io_flag, node_io_flag); 
F2FS_RW_ATTR(CPRC_INFO, ckpt_req_control, ckpt_thread_ioprio, ckpt_thread_ioprio);

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);
@@ -715,6 +723,7 @@ static struct attribute *f2fs_attrs[] = { 
	ATTR_LIST(ckpt_thread_ioprio),

	ATTR_LIST(dirty_segments),

	ATTR_LIST(free_segments),

	ATTR_LIST(ovp_segments),

	ATTR_LIST(unusable),

	ATTR_LIST(lifetime_write_kbytes),

	ATTR_LIST(features),