Commit 6047de54 authored by Yangtao Li's avatar Yangtao Li Committed by Jaegeuk Kim
Browse files

f2fs: add barrier mount option 



This patch adds a mount option, barrier, in f2fs.
The barrier option is the opposite of nobarrier.
If this option is set, cache_flush commands are allowed to be issued.

Signed-off-by: default avatarYangtao Li <frank.li@vivo.com>
Reviewed-by: default avatarChao Yu <chao@kernel.org>
Signed-off-by: default avatarJaegeuk Kim <jaegeuk@kernel.org>
parent b5f1a218

Documentation/filesystems/f2fs.rst

+2 −0
Original line number Diff line number Diff line
@@ -154,6 +154,8 @@ nobarrier This option can be used if underlying storage guarantees 
			 If this option is set, no cache_flush commands are issued

			 but f2fs still guarantees the write ordering of all the

			 data writes.

barrier		 If this option is set, cache_flush commands are allowed to be

			 issued.

fastboot		 This option is used when a system wants to reduce mount

			 time as much as possible, even though normal performance

			 can be sacrificed.

fs/f2fs/super.c

+7 −0
Original line number Diff line number Diff line
@@ -111,6 +111,7 @@ enum { 
	Opt_noinline_dentry,

	Opt_flush_merge,

	Opt_noflush_merge,

	Opt_barrier,

	Opt_nobarrier,

	Opt_fastboot,

	Opt_extent_cache,
@@ -187,6 +188,7 @@ static match_table_t f2fs_tokens = { 
	{Opt_noinline_dentry, "noinline_dentry"},

	{Opt_flush_merge, "flush_merge"},

	{Opt_noflush_merge, "noflush_merge"},

	{Opt_barrier, "barrier"},

	{Opt_nobarrier, "nobarrier"},

	{Opt_fastboot, "fastboot"},

	{Opt_extent_cache, "extent_cache"},
@@ -807,6 +809,9 @@ static int parse_options(struct super_block *sb, char *options, bool is_remount) 
		case Opt_nobarrier:

			set_opt(sbi, NOBARRIER);

			break;

		case Opt_barrier:

			clear_opt(sbi, NOBARRIER);

			break;

		case Opt_fastboot:

			set_opt(sbi, FASTBOOT);

			break;
@@ -1940,6 +1945,8 @@ static int f2fs_show_options(struct seq_file *seq, struct dentry *root) 
		seq_puts(seq, ",flush_merge");

	if (test_opt(sbi, NOBARRIER))

		seq_puts(seq, ",nobarrier");

	else

		seq_puts(seq, ",barrier");

	if (test_opt(sbi, FASTBOOT))

		seq_puts(seq, ",fastboot");

	if (test_opt(sbi, EXTENT_CACHE))