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Commit 343f40f0 authored by Chao Yu's avatar Chao Yu Committed by Jaegeuk Kim
Browse files

f2fs: introduce new option for controlling data flush 



Add a new option 'data_flush' to enable data flush functionality.

Signed-off-by: default avatarChao Yu <chao2.yu@samsung.com>
Signed-off-by: default avatarJaegeuk Kim <jaegeuk@kernel.org>
parent c227f912

Documentation/filesystems/f2fs.txt

+2 −0
Original line number Diff line number Diff line
@@ -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

fs/f2fs/f2fs.h

+1 −0
Original line number Diff line number Diff line
@@ -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)

fs/f2fs/super.c

+7 −0
Original line number Diff line number Diff line
@@ -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;