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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: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Chao Yu 2021-01-14 09:41:27 +08:00 committed by Jaegeuk Kim
parent 6d1451bf7f
commit 0bfe9f7904
2 changed files with 31 additions and 0 deletions
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23
Documentation/ABI/testing/sysfs-fs-f2fs
View File

@ -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
====== ===================== =================================

8
fs/f2fs/sysfs.c
View File

@ -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);