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Message-ID: <20201210064115.47351-1-yuchao0@huawei.com>
Date: Thu, 10 Dec 2020 14:41:15 +0800
From: Chao Yu <yuchao0@...wei.com>
To: <jaegeuk@...nel.org>
CC: <linux-f2fs-devel@...ts.sourceforge.net>,
<linux-kernel@...r.kernel.org>, <chao@...nel.org>,
Chao Yu <yuchao0@...wei.com>
Subject: [PATCH v3 5/5] 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@...wei.com>
---
v3:
- just print one single value as output
Documentation/ABI/testing/sysfs-fs-f2fs | 21 +++++++++++++++++++++
fs/f2fs/sysfs.c | 8 ++++++++
2 files changed, 29 insertions(+)
diff --git a/Documentation/ABI/testing/sysfs-fs-f2fs b/Documentation/ABI/testing/sysfs-fs-f2fs
index 3dfee94e0618..9b2f93eda1f8 100644
--- a/Documentation/ABI/testing/sysfs-fs-f2fs
+++ b/Documentation/ABI/testing/sysfs-fs-f2fs
@@ -377,3 +377,24 @@ 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@...wei.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 */
diff --git a/fs/f2fs/sysfs.c b/fs/f2fs/sysfs.c
index ebca0b4961e8..d5198689ab02 100644
--- a/fs/f2fs/sysfs.c
+++ b/fs/f2fs/sysfs.c
@@ -101,6 +101,12 @@ 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)
{
@@ -711,7 +717,9 @@ 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);
--
2.29.2
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