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Date: Fri, 13 Aug 2021 22:09:53 +0800
From: Chao Yu <chao@...nel.org>
To: Yangtao Li <frank.li@...o.com>, jaegeuk@...nel.org
Cc: linux-f2fs-devel@...ts.sourceforge.net,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH] f2fs: convert /sys/fs/f2fs/<disk>/stat/sb_status to use
string
On 2021/8/13 22:01, Yangtao Li wrote:
> Do not use numbers but strings to improve readability when flag is set.
This breaks output rule of sysfs entry, see below link:
https://www.mail-archive.com/linux-f2fs-devel@lists.sourceforge.net/msg19001.html
Thanks,
>
> Signed-off-by: Yangtao Li <frank.li@...o.com>
> ---
> This patch is based on [v2] f2fs: improve sbi status info in debugfs/f2fs/status
>
> Documentation/ABI/testing/sysfs-fs-f2fs | 34 ++++++++++++-------------
> fs/f2fs/debug.c | 19 +-------------
> fs/f2fs/f2fs.h | 1 +
> fs/f2fs/sysfs.c | 26 ++++++++++++++++++-
> 4 files changed, 44 insertions(+), 36 deletions(-)
>
> diff --git a/Documentation/ABI/testing/sysfs-fs-f2fs b/Documentation/ABI/testing/sysfs-fs-f2fs
> index 73211f77d11e..b07eb1e27c97 100644
> --- a/Documentation/ABI/testing/sysfs-fs-f2fs
> +++ b/Documentation/ABI/testing/sysfs-fs-f2fs
> @@ -410,23 +410,23 @@ 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
> - ====== ===================== =================================
> + ===================== =================================
> + sb status description
> + fs_dirty dirty flag for checkpoint
> + closing specify unmounting
> + need_fsck need fsck.f2fs to fix
> + recovering recovery is doing or not
> + sb_dirty need to recover superblock
> + need_cp need to checkpoint
> + shutdown shutdown by ioctl
> + recovered recovered orphan/data
> + cp_disabled CP was disabled last mount
> + cp_disabled_quick CP was disabled quickly
> + quota_need_flush need to flush quota info in CP
> + quota_skip_flush skip flushing quota in current CP
> + quota_need_repair quota file may be corrupted
> + resizefs resizefs is in process
> + ===================== =================================
>
> What: /sys/fs/f2fs/<disk>/ckpt_thread_ioprio
> Date: January 2021
> diff --git a/fs/f2fs/debug.c b/fs/f2fs/debug.c
> index d8c09346545d..298bf41a13b6 100644
> --- a/fs/f2fs/debug.c
> +++ b/fs/f2fs/debug.c
> @@ -323,23 +323,6 @@ static void update_mem_info(struct f2fs_sb_info *sbi)
> #endif
> }
>
> -static char *s_flag[] = {
> - [SBI_IS_DIRTY] = " fs_dirty",
> - [SBI_IS_CLOSE] = " closing",
> - [SBI_NEED_FSCK] = " need_fsck",
> - [SBI_POR_DOING] = " recovering",
> - [SBI_NEED_SB_WRITE] = " sb_dirty",
> - [SBI_NEED_CP] = " need_cp",
> - [SBI_IS_SHUTDOWN] = " shutdown",
> - [SBI_IS_RECOVERED] = " recovered",
> - [SBI_CP_DISABLED] = " cp_disabled",
> - [SBI_CP_DISABLED_QUICK] = " cp_disabled_quick",
> - [SBI_QUOTA_NEED_FLUSH] = " quota_need_flush",
> - [SBI_QUOTA_SKIP_FLUSH] = " quota_skip_flush",
> - [SBI_QUOTA_NEED_REPAIR] = " quota_need_repair",
> - [SBI_IS_RESIZEFS] = " resizefs",
> -};
> -
> static int stat_show(struct seq_file *s, void *v)
> {
> struct f2fs_stat_info *si;
> @@ -357,7 +340,7 @@ static int stat_show(struct seq_file *s, void *v)
> if (si->sbi->s_flag) {
> seq_puts(s, "[SBI:");
> for_each_set_bit(j, &si->sbi->s_flag, 32)
> - seq_puts(s, s_flag[j]);
> + seq_printf(s, " %s", s_flag[j]);
> seq_puts(s, "]\n");
> }
> seq_printf(s, "[SB: 1] [CP: 2] [SIT: %d] [NAT: %d] ",
> diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
> index 67faa43cc141..772dd3352c64 100644
> --- a/fs/f2fs/f2fs.h
> +++ b/fs/f2fs/f2fs.h
> @@ -1257,6 +1257,7 @@ enum {
> SBI_QUOTA_NEED_REPAIR, /* quota file may be corrupted */
> SBI_IS_RESIZEFS, /* resizefs is in process */
> };
> +extern char *s_flag[];
>
> enum {
> CP_TIME,
> diff --git a/fs/f2fs/sysfs.c b/fs/f2fs/sysfs.c
> index 0954761341d7..e6f87e3d8f2e 100644
> --- a/fs/f2fs/sysfs.c
> +++ b/fs/f2fs/sysfs.c
> @@ -111,10 +111,34 @@ static ssize_t lifetime_write_kbytes_show(struct f2fs_attr *a,
> sbi->sectors_written_start) >> 1)));
> }
>
> +char *s_flag[] = {
> + [SBI_IS_DIRTY] = "fs_dirty",
> + [SBI_IS_CLOSE] = "closing",
> + [SBI_NEED_FSCK] = "need_fsck",
> + [SBI_POR_DOING] = "recovering",
> + [SBI_NEED_SB_WRITE] = "sb_dirty",
> + [SBI_NEED_CP] = "need_cp",
> + [SBI_IS_SHUTDOWN] = "shutdown",
> + [SBI_IS_RECOVERED] = "recovered",
> + [SBI_CP_DISABLED] = "cp_disabled",
> + [SBI_CP_DISABLED_QUICK] = "cp_disabled_quick",
> + [SBI_QUOTA_NEED_FLUSH] = "quota_need_flush",
> + [SBI_QUOTA_SKIP_FLUSH] = "quota_skip_flush",
> + [SBI_QUOTA_NEED_REPAIR] = "quota_need_repair",
> + [SBI_IS_RESIZEFS] = "resizefs",
> +};
> +
> 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);
> + int len = 0, i = 0;
> +
> + for_each_set_bit(i, &sbi->s_flag, 32)
> + len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
> + len ? ", " : "", s_flag[i]);
> + len += scnprintf(buf + len, PAGE_SIZE - len, "\n");
> +
> + return len;
> }
>
> static ssize_t features_show(struct f2fs_attr *a,
>
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