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SubjectRe: [f2fs-dev] [PATCH] f2fs: add compr_inode and compr_blocks sysfs nodes
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On 2020/10/16 13:14, Daeho Jeong wrote:
> From: Daeho Jeong <daehojeong@google.com>
>
> Added compr_inode to show compressed inode count and compr_blocks to
> show compressed block count in sysfs.

As there are so many entries in ../f2fs/<disk>/ directory, it looks a mess
there, I suggest that we can add a new directory 'stats' in ../f2fs/<disk>/,
in where we can store all readonly stats related entries there later.

How do you think?

Thanks,

>
> Signed-off-by: Daeho Jeong <daehojeong@google.com>
> ---
> Documentation/ABI/testing/sysfs-fs-f2fs | 10 ++++++++++
> fs/f2fs/sysfs.c | 17 +++++++++++++++++
> 2 files changed, 27 insertions(+)
>
> diff --git a/Documentation/ABI/testing/sysfs-fs-f2fs b/Documentation/ABI/testing/sysfs-fs-f2fs
> index 834d0becae6d..a01c26484c69 100644
> --- a/Documentation/ABI/testing/sysfs-fs-f2fs
> +++ b/Documentation/ABI/testing/sysfs-fs-f2fs
> @@ -350,3 +350,13 @@ Date: April 2020
> Contact: "Daeho Jeong" <daehojeong@google.com>
> Description: Give a way to change iostat_period time. 3secs by default.
> The new iostat trace gives stats gap given the period.
> +
> +What: /sys/fs/f2fs/<disk>/compr_inode
> +Date: October 2020
> +Contact: "Daeho Jeong" <daehojeong@google.com>
> +Description: Show compressed inode count
> +
> +What: /sys/fs/f2fs/<disk>/compr_blocks
> +Date: October 2020
> +Contact: "Daeho Jeong" <daehojeong@google.com>
> +Description: Show compressed block count
> diff --git a/fs/f2fs/sysfs.c b/fs/f2fs/sysfs.c
> index 94c98e412aa1..7139a29a00d3 100644
> --- a/fs/f2fs/sysfs.c
> +++ b/fs/f2fs/sysfs.c
> @@ -223,6 +223,19 @@ static ssize_t avg_vblocks_show(struct f2fs_attr *a,
> f2fs_update_sit_info(sbi);
> return sprintf(buf, "%llu\n", (unsigned long long)(si->avg_vblocks));
> }
> +
> +static ssize_t compr_inode_show(struct f2fs_attr *a,
> + struct f2fs_sb_info *sbi, char *buf)
> +{
> + return sprintf(buf, "%u\n", atomic_read(&sbi->compr_inode));
> +}
> +
> +static ssize_t compr_blocks_show(struct f2fs_attr *a,
> + struct f2fs_sb_info *sbi, char *buf)
> +{
> + return sprintf(buf, "%llu\n", atomic64_read(&sbi->compr_blocks));
> +}
> +
> #endif
>
> static ssize_t main_blkaddr_show(struct f2fs_attr *a,
> @@ -591,6 +604,8 @@ F2FS_STAT_ATTR(STAT_INFO, f2fs_stat_info, gc_background_calls, bg_gc);
> F2FS_GENERAL_RO_ATTR(moved_blocks_background);
> F2FS_GENERAL_RO_ATTR(moved_blocks_foreground);
> F2FS_GENERAL_RO_ATTR(avg_vblocks);
> +F2FS_GENERAL_RO_ATTR(compr_inode);
> +F2FS_GENERAL_RO_ATTR(compr_blocks);
> #endif
>
> #ifdef CONFIG_FS_ENCRYPTION
> @@ -675,6 +690,8 @@ static struct attribute *f2fs_attrs[] = {
> ATTR_LIST(moved_blocks_foreground),
> ATTR_LIST(moved_blocks_background),
> ATTR_LIST(avg_vblocks),
> + ATTR_LIST(compr_inode),
> + ATTR_LIST(compr_blocks),
> #endif
> NULL,
> };
>

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