Commit 0bfe9f79 authored by Chao Yu's avatar Chao Yu Committed by Jaegeuk Kim
Browse files

f2fs: introduce sb_status sysfs node 



Introduce /sys/fs/f2fs/<devname>/stat/sb_status to show superblock
status in real time as a hexadecimal value.

value           sb status macro                 description

0x1             SBI_IS_DIRTY,                   /* dirty flag for checkpoint */
0x2             SBI_IS_CLOSE,                   /* specify unmounting */
0x4             SBI_NEED_FSCK,                  /* need fsck.f2fs to fix */
0x8             SBI_POR_DOING,                  /* recovery is doing or not */
0x10            SBI_NEED_SB_WRITE,              /* need to recover superblock */
0x20            SBI_NEED_CP,                    /* need to checkpoint */
0x40            SBI_IS_SHUTDOWN,                /* shutdown by ioctl */
0x80            SBI_IS_RECOVERED,               /* recovered orphan/data */
0x100           SBI_CP_DISABLED,                /* CP was disabled last mount */
0x200           SBI_CP_DISABLED_QUICK,          /* CP was disabled quickly */
0x400           SBI_QUOTA_NEED_FLUSH,           /* need to flush quota info in CP */
0x800           SBI_QUOTA_SKIP_FLUSH,           /* skip flushing quota in current CP */
0x1000          SBI_QUOTA_NEED_REPAIR,          /* quota file may be corrupted */
0x2000          SBI_IS_RESIZEFS,                /* resizefs is in process */

Signed-off-by: default avatarChao Yu <yuchao0@huawei.com>
Signed-off-by: default avatarJaegeuk Kim <jaegeuk@kernel.org>
parent 6d1451bf

Documentation/ABI/testing/sysfs-fs-f2fs

+23 −0
Original line number Diff line number Diff line
@@ -377,3 +377,26 @@ Description: This gives a control to limit the bio size in f2fs. 
		Default is zero, which will follow underlying block layer limit,

		whereas, if it has a certain bytes value, f2fs won't submit a

		bio larger than that size.



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

Date:		December 2020

Contact:	"Chao Yu" <yuchao0@huawei.com>

Description:	Show status of f2fs superblock in real time.



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

		value  sb status macro       description

		0x1    SBI_IS_DIRTY          dirty flag for checkpoint

		0x2    SBI_IS_CLOSE          specify unmounting

		0x4    SBI_NEED_FSCK         need fsck.f2fs to fix

		0x8    SBI_POR_DOING         recovery is doing or not

		0x10   SBI_NEED_SB_WRITE     need to recover superblock

		0x20   SBI_NEED_CP           need to checkpoint

		0x40   SBI_IS_SHUTDOWN       shutdown by ioctl

		0x80   SBI_IS_RECOVERED      recovered orphan/data

		0x100  SBI_CP_DISABLED       CP was disabled last mount

		0x200  SBI_CP_DISABLED_QUICK CP was disabled quickly

		0x400  SBI_QUOTA_NEED_FLUSH  need to flush quota info in CP

		0x800  SBI_QUOTA_SKIP_FLUSH  skip flushing quota in current CP

		0x1000 SBI_QUOTA_NEED_REPAIR quota file may be corrupted

		0x2000 SBI_IS_RESIZEFS       resizefs is in process

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

fs/f2fs/sysfs.c

+8 −0
Original line number Diff line number Diff line
@@ -96,6 +96,12 @@ static ssize_t lifetime_write_kbytes_show(struct f2fs_attr *a, 
				sbi->sectors_written_start) >> 1)));

}



static ssize_t sb_status_show(struct f2fs_attr *a,

		struct f2fs_sb_info *sbi, char *buf)

{

	return sprintf(buf, "%lx\n", sbi->s_flag);

}



static ssize_t features_show(struct f2fs_attr *a,

		struct f2fs_sb_info *sbi, char *buf)

{
@@ -702,7 +708,9 @@ static struct attribute *f2fs_feat_attrs[] = { 
};

ATTRIBUTE_GROUPS(f2fs_feat);



F2FS_GENERAL_RO_ATTR(sb_status);

static struct attribute *f2fs_stat_attrs[] = {

	ATTR_LIST(sb_status),

	NULL,

};

ATTRIBUTE_GROUPS(f2fs_stat);