Commit 718693c8 authored by Chao Yu's avatar Chao Yu Committed by Jaegeuk Kim
Browse files

f2fs: introduce cp_status sysfs entry 



This patch adds a new sysfs entry named cp_status, it can output
checkpoint flags in real time.

Signed-off-by: default avatarChao Yu <chao@kernel.org>
Signed-off-by: default avatarJaegeuk Kim <jaegeuk@kernel.org>
parent fcc2d8cc

Documentation/ABI/testing/sysfs-fs-f2fs

+24 −0
Original line number Diff line number Diff line
@@ -466,6 +466,30 @@ Description: Show status of f2fs superblock in real time. 
		0x4000 SBI_IS_FREEZING       freefs is in process

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



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

Date:		September 2022

Contact:	"Chao Yu" <chao.yu@oppo.com>

Description:	Show status of f2fs checkpoint in real time.



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

		cp flag				value

		CP_UMOUNT_FLAG			0x00000001

		CP_ORPHAN_PRESENT_FLAG		0x00000002

		CP_COMPACT_SUM_FLAG		0x00000004

		CP_ERROR_FLAG			0x00000008

		CP_FSCK_FLAG			0x00000010

		CP_FASTBOOT_FLAG		0x00000020

		CP_CRC_RECOVERY_FLAG		0x00000040

		CP_NAT_BITS_FLAG		0x00000080

		CP_TRIMMED_FLAG			0x00000100

		CP_NOCRC_RECOVERY_FLAG		0x00000200

		CP_LARGE_NAT_BITMAP_FLAG	0x00000400

		CP_QUOTA_NEED_FSCK_FLAG		0x00000800

		CP_DISABLED_FLAG		0x00001000

		CP_DISABLED_QUICK_FLAG		0x00002000

		CP_RESIZEFS_FLAG		0x00004000

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



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

Date:		January 2021

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

fs/f2fs/sysfs.c

+8 −0
Original line number Diff line number Diff line
@@ -128,6 +128,12 @@ static ssize_t sb_status_show(struct f2fs_attr *a, 
	return sprintf(buf, "%lx\n", sbi->s_flag);

}



static ssize_t cp_status_show(struct f2fs_attr *a,

		struct f2fs_sb_info *sbi, char *buf)

{

	return sprintf(buf, "%x\n", le32_to_cpu(F2FS_CKPT(sbi)->ckpt_flags));

}



static ssize_t pending_discard_show(struct f2fs_attr *a,

		struct f2fs_sb_info *sbi, char *buf)

{
@@ -1029,8 +1035,10 @@ static struct attribute *f2fs_feat_attrs[] = { 
ATTRIBUTE_GROUPS(f2fs_feat);



F2FS_GENERAL_RO_ATTR(sb_status);

F2FS_GENERAL_RO_ATTR(cp_status);

static struct attribute *f2fs_stat_attrs[] = {

	ATTR_LIST(sb_status),

	ATTR_LIST(cp_status),

	NULL,

};

ATTRIBUTE_GROUPS(f2fs_stat);