Re: [f2fs-dev] [PATCH] f2fs: add compr_inode and compr_blocks sysfs nodes

[Chao Yu]

On 2020/10/16 13:14, Daeho Jeong wrote:

From: Daeho Jeong <daehoje...@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 <daehoje...@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" <daehoje...@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" <daehoje...@google.com>
+Description:   Show compressed inode count
+
+What:          /sys/fs/f2fs/<disk>/compr_blocks
+Date:          October 2020
+Contact:       "Daeho Jeong" <daehoje...@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,
  };