[PATCH] f2fs: support to show noage_extent_cache mount option

[Yangtao Li]

This patch support noage_extent_cache mount option.

Signed-off-by: Yangtao Li <frank.li@xxxxxxxx>
---
 Documentation/filesystems/f2fs.rst | 2 ++
 fs/f2fs/super.c                    | 7 +++++++
 2 files changed, 9 insertions(+)

diff --git a/Documentation/filesystems/f2fs.rst b/Documentation/filesystems/f2fs.rst
index a81c896464ff..75505ab88de8 100644
--- a/Documentation/filesystems/f2fs.rst
+++ b/Documentation/filesystems/f2fs.rst
@@ -352,6 +352,8 @@ age_extent_cache	 Enable an age extent cache based on rb-tree. It records
 			 data block update frequency of the extent per inode, in
 			 order to provide better temperature hints for data block
 			 allocation.
+noage_extent_cache		 Disable an age extent cache based on rb-tree, see
+			 the above age_extent_cache mount option.
 ======================== ============================================================
 
 Debugfs Entries
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index b5828a67f7c1..8bd9953ea7e3 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -165,6 +165,7 @@ enum {
 	Opt_discard_unit,
 	Opt_memory_mode,
 	Opt_age_extent_cache,
+	Opt_noage_extent_cache,
 	Opt_err,
 };
 
@@ -244,6 +245,7 @@ static match_table_t f2fs_tokens = {
 	{Opt_discard_unit, "discard_unit=%s"},
 	{Opt_memory_mode, "memory=%s"},
 	{Opt_age_extent_cache, "age_extent_cache"},
+	{Opt_noage_extent_cache, "noage_extent_cache"},
 	{Opt_err, NULL},
 };
 
@@ -1269,6 +1271,9 @@ static int parse_options(struct super_block *sb, char *options, bool is_remount)
 		case Opt_age_extent_cache:
 			set_opt(sbi, AGE_EXTENT_CACHE);
 			break;
+		case Opt_noage_extent_cache:
+			clear_opt(sbi, AGE_EXTENT_CACHE);
+			break;
 		default:
 			f2fs_err(sbi, "Unrecognized mount option \"%s\" or missing value",
 				 p);
@@ -1974,6 +1979,8 @@ static int f2fs_show_options(struct seq_file *seq, struct dentry *root)
 		seq_puts(seq, ",noextent_cache");
 	if (test_opt(sbi, AGE_EXTENT_CACHE))
 		seq_puts(seq, ",age_extent_cache");
+	else
+		seq_puts(seq, ",noage_extent_cache");
 	if (test_opt(sbi, DATA_FLUSH))
 		seq_puts(seq, ",data_flush");
 
-- 
2.35.1