Add a new option 'data_flush' to enable data flush functionality.
Signed-off-by: Chao Yu <chao2...@samsung.com>
---
v2:
- rebase last dev-test branch.
- fix to set option correctly.
---
Documentation/filesystems/f2fs.txt | 2 ++
fs/f2fs/f2fs.h | 1 +
fs/f2fs/super.c | 7 +++++++
3 files changed, 10 insertions(+)
diff --git a/Documentation/filesystems/f2fs.txt
b/Documentation/filesystems/f2fs.txt
index ad10494..e1c9f08 100644
--- a/Documentation/filesystems/f2fs.txt
+++ b/Documentation/filesystems/f2fs.txt
@@ -149,6 +149,8 @@ noextent_cache Disable an extent cache based on
rb-tree explicitly, see
the above extent_cache mount option.
noinline_data Disable the inline data feature, inline data feature is
enabled by default.
+data_flush Enable data flushing before checkpoint in order to
+ persist data of regular and symlink.
================================================================================
DEBUGFS ENTRIES
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index e73ddea..e907d9e 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -54,6 +54,7 @@
#define F2FS_MOUNT_FASTBOOT 0x00001000
#define F2FS_MOUNT_EXTENT_CACHE 0x00002000
#define F2FS_MOUNT_FORCE_FG_GC 0x00004000
+#define F2FS_MOUNT_DATA_FLUSH 0x00008000
#define clear_opt(sbi, option) (sbi->mount_opt.opt &= ~F2FS_MOUNT_##option)
#define set_opt(sbi, option) (sbi->mount_opt.opt |= F2FS_MOUNT_##option)
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index 551688e..1f7f87e 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -67,6 +67,7 @@ enum {
Opt_extent_cache,
Opt_noextent_cache,
Opt_noinline_data,
+ Opt_data_flush,
Opt_err,
};
@@ -91,6 +92,7 @@ static match_table_t f2fs_tokens = {
{Opt_extent_cache, "extent_cache"},
{Opt_noextent_cache, "noextent_cache"},
{Opt_noinline_data, "noinline_data"},
+ {Opt_data_flush, "data_flush"},
{Opt_err, NULL},
};
@@ -406,6 +408,9 @@ static int parse_options(struct super_block *sb, char
*options)
case Opt_noinline_data:
clear_opt(sbi, INLINE_DATA);
break;
+ case Opt_data_flush:
+ set_opt(sbi, DATA_FLUSH);
+ break;
default:
f2fs_msg(sb, KERN_ERR,
"Unrecognized mount option \"%s\" or missing
value",
@@ -687,6 +692,8 @@ static int f2fs_show_options(struct seq_file *seq, struct
dentry *root)
seq_puts(seq, ",extent_cache");
else
seq_puts(seq, ",noextent_cache");
+ if (test_opt(sbi, DATA_FLUSH))
+ seq_puts(seq, ",data_flush");
seq_printf(seq, ",active_logs=%u", sbi->active_logs);
return 0;
--
2.6.3
--
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