Commit c3c2d45b authored by Zhiguo Niu's avatar Zhiguo Niu Committed by Jaegeuk Kim
Browse files

f2fs: show more discard status by sysfs 



The current pending_discard attr just only shows the discard_cmd_cnt
information. More discard status can be shown so that we can check
them through sysfs when needed.

Signed-off-by: default avatarZhiguo Niu <zhiguo.niu@unisoc.com>
Reviewed-by: default avatarChao Yu <chao@kernel.org>
Signed-off-by: default avatarJaegeuk Kim <jaegeuk@kernel.org>
parent 19ec1d31

Documentation/ABI/testing/sysfs-fs-f2fs

+15 −0
Original line number Diff line number Diff line
@@ -498,6 +498,21 @@ Description: Show status of f2fs checkpoint in real time. 
		CP_RESIZEFS_FLAG		0x00004000

		=============================== ==============================



What:		/sys/fs/f2fs/<disk>/stat/issued_discard

Date:		December 2023

Contact:	"Zhiguo Niu" <zhiguo.niu@unisoc.com>

Description:	Shows the number of issued discard.



What:		/sys/fs/f2fs/<disk>/stat/queued_discard

Date:		December 2023

Contact:	"Zhiguo Niu" <zhiguo.niu@unisoc.com>

Description:	Shows the number of queued discard.



What:		/sys/fs/f2fs/<disk>/stat/undiscard_blks

Date:		December 2023

Contact:	"Zhiguo Niu" <zhiguo.niu@unisoc.com>

Description:	Shows the total number of undiscard blocks.



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

Date:		January 2021

Contact:	"Daeho Jeong" <daehojeong@google.com>

fs/f2fs/sysfs.c

+34 −0
Original line number Diff line number Diff line
@@ -143,6 +143,33 @@ static ssize_t pending_discard_show(struct f2fs_attr *a, 
				&SM_I(sbi)->dcc_info->discard_cmd_cnt));

}



static ssize_t issued_discard_show(struct f2fs_attr *a,

		struct f2fs_sb_info *sbi, char *buf)

{

	if (!SM_I(sbi)->dcc_info)

		return -EINVAL;

	return sysfs_emit(buf, "%llu\n", (unsigned long long)atomic_read(

				&SM_I(sbi)->dcc_info->issued_discard));

}



static ssize_t queued_discard_show(struct f2fs_attr *a,

		struct f2fs_sb_info *sbi, char *buf)

{

	if (!SM_I(sbi)->dcc_info)

		return -EINVAL;

	return sysfs_emit(buf, "%llu\n", (unsigned long long)atomic_read(

				&SM_I(sbi)->dcc_info->queued_discard));

}



static ssize_t undiscard_blks_show(struct f2fs_attr *a,

		struct f2fs_sb_info *sbi, char *buf)

{

	if (!SM_I(sbi)->dcc_info)

		return -EINVAL;

	return sysfs_emit(buf, "%u\n",

				SM_I(sbi)->dcc_info->undiscard_blks);

}



static ssize_t gc_mode_show(struct f2fs_attr *a,

		struct f2fs_sb_info *sbi, char *buf)

{
@@ -1213,9 +1240,16 @@ ATTRIBUTE_GROUPS(f2fs_feat); 


F2FS_GENERAL_RO_ATTR(sb_status);

F2FS_GENERAL_RO_ATTR(cp_status);

F2FS_GENERAL_RO_ATTR(issued_discard);

F2FS_GENERAL_RO_ATTR(queued_discard);

F2FS_GENERAL_RO_ATTR(undiscard_blks);



static struct attribute *f2fs_stat_attrs[] = {

	ATTR_LIST(sb_status),

	ATTR_LIST(cp_status),

	ATTR_LIST(issued_discard),

	ATTR_LIST(queued_discard),

	ATTR_LIST(undiscard_blks),

	NULL,

};

ATTRIBUTE_GROUPS(f2fs_stat);