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f2fs: introduce sb_status sysfs node

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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 79ac6fa9f5
commit 5e5afb124c
2 changed files with 31 additions and 0 deletions
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23
Documentation/ABI/testing/sysfs-fs-f2fs
View File

@@ -357,3 +357,26 @@ Description: This gives a control to limit the bio size in f2fs.
Default is zero, which will follow underlying block layer limit, Default is zero, which will follow underlying block layer limit,
whereas, if it has a certain bytes value, f2fs won't submit a whereas, if it has a certain bytes value, f2fs won't submit a
bio larger than that size. 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

@@ -101,6 +101,12 @@ static ssize_t lifetime_write_kbytes_show(struct f2fs_attr *a,
sbi->sectors_written_start) >> 1))); 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, static ssize_t features_show(struct f2fs_attr *a,
struct f2fs_sb_info *sbi, char *buf) struct f2fs_sb_info *sbi, char *buf)
{ {
@@ -709,7 +715,9 @@ static struct attribute *f2fs_feat_attrs[] = {
NULL, NULL,
}; };
F2FS_GENERAL_RO_ATTR(sb_status);
static struct attribute *f2fs_stat_attrs[] = { static struct attribute *f2fs_stat_attrs[] = {
ATTR_LIST(sb_status),
NULL, NULL,
}; };