f2fs: enable inline_dentry by default and add noinline_dentry option

Make inline_dentry as default mount option to improve space usage and
IO performance in scenario of numerous small directory.
It adds noinline_dentry mount option, instead.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

2 files changed, 9 insertions, 0 deletions

diff --git a/Documentation/filesystems/f2fs.txt b/Documentation/filesystems/f2fs.txt
index ecd808088362..753dd4f96afe 100644
--- a/Documentation/filesystems/f2fs.txt
+++ b/Documentation/filesystems/f2fs.txt
@@ -131,6 +131,7 @@ inline_dentry          Enable the inline dir feature: data in new created
                        directory entries can be written into inode block. The
                        space of inode block which is used to store inline
                        dentries is limited to ~3.4k.
+noinline_dentry        Diable the inline dentry feature.
 flush_merge            Merge concurrent cache_flush commands as much as possible
                        to eliminate redundant command issues. If the underlying
                        device handles the cache_flush command relatively slowly,
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index 7f863a645ab1..555217fe43ce 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -87,6 +87,7 @@ enum {
         Opt_inline_xattr,
         Opt_inline_data,
         Opt_inline_dentry,
+        Opt_noinline_dentry,
         Opt_flush_merge,
         Opt_noflush_merge,
         Opt_nobarrier,
@@ -118,6 +119,7 @@ static match_table_t f2fs_tokens = {
         {Opt_inline_xattr, "inline_xattr"},
         {Opt_inline_data, "inline_data"},
         {Opt_inline_dentry, "inline_dentry"},
+        {Opt_noinline_dentry, "noinline_dentry"},
         {Opt_flush_merge, "flush_merge"},
         {Opt_noflush_merge, "noflush_merge"},
         {Opt_nobarrier, "nobarrier"},
@@ -488,6 +490,9 @@ static int parse_options(struct super_block *sb, char *options)
                 case Opt_inline_dentry:
                         set_opt(sbi, INLINE_DENTRY);
                         break;
+                case Opt_noinline_dentry:
+                        clear_opt(sbi, INLINE_DENTRY);
+                        break;
                 case Opt_flush_merge:
                         set_opt(sbi, FLUSH_MERGE);
                         break;
@@ -878,6 +883,8 @@ static int f2fs_show_options(struct seq_file *seq, struct dentry *root)
                 seq_puts(seq, ",noinline_data");
         if (test_opt(sbi, INLINE_DENTRY))
                 seq_puts(seq, ",inline_dentry");
+        else
+                seq_puts(seq, ",noinline_dentry");
         if (!f2fs_readonly(sbi->sb) && test_opt(sbi, FLUSH_MERGE))
                 seq_puts(seq, ",flush_merge");
         if (test_opt(sbi, NOBARRIER))
@@ -975,6 +982,7 @@ static void default_options(struct f2fs_sb_info *sbi)
 
         set_opt(sbi, BG_GC);
         set_opt(sbi, INLINE_DATA);
+        set_opt(sbi, INLINE_DENTRY);
         set_opt(sbi, EXTENT_CACHE);
         sbi->sb->s_flags |= MS_LAZYTIME;
         set_opt(sbi, FLUSH_MERGE);