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f2fs: introduce new option for controlling data flush 

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

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

 Conflicts:
	Documentation/filesystems/f2fs.txt
This commit is contained in:
Chao Yu 2015-12-16 13:12:16 +08:00 committed by Zhao Wei Liew
parent 5f73323b85
commit 6c7d110359
3 changed files with 11 additions and 1 deletions
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4
Documentation/filesystems/f2fs.txt
View File

@ -145,10 +145,12 @@ extent_cache Enable an extent cache based on rb-tree, it can cache
as many as extent which map between contiguous logical
address and physical address per inode, resulting in
increasing the cache hit ratio. Set by default.
noextent_cache Diable an extent cache based on rb-tree explicitly, see
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

1
fs/f2fs/f2fs.h
View File

@ -55,6 +55,7 @@
#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)

7
fs/f2fs/super.c
View File

@ -66,6 +66,7 @@ enum {
Opt_extent_cache,
Opt_noextent_cache,
Opt_noinline_data,
Opt_data_flush,
Opt_err,
};
@ -90,6 +91,7 @@ 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},
};
@ -405,6 +407,9 @@ 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",
@ -680,6 +685,8 @@ 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;