Commit ec91538d authored by Jaegeuk Kim's avatar Jaegeuk Kim
Browse files

f2fs: get io size bit from mount option 



This patch adds to set io_size_bits from mount option.

Signed-off-by: default avatarJaegeuk Kim <jaegeuk@kernel.org>
parent 0a595eba

Documentation/filesystems/f2fs.txt

+2 −0
Original line number Diff line number Diff line
@@ -157,6 +157,8 @@ data_flush Enable data flushing before checkpoint in order to 
mode=%s                Control block allocation mode which supports "adaptive"

                       and "lfs". In "lfs" mode, there should be no random

                       writes towards main area.

io_bits=%u             Set the bit size of write IO requests. It should be set

                       with "mode=lfs".



================================================================================

DEBUGFS ENTRIES

fs/f2fs/super.c

+22 −0
Original line number Diff line number Diff line
@@ -101,6 +101,7 @@ enum { 
	Opt_noinline_data,

	Opt_data_flush,

	Opt_mode,

	Opt_io_size_bits,

	Opt_fault_injection,

	Opt_lazytime,

	Opt_nolazytime,
@@ -133,6 +134,7 @@ static match_table_t f2fs_tokens = { 
	{Opt_noinline_data, "noinline_data"},

	{Opt_data_flush, "data_flush"},

	{Opt_mode, "mode=%s"},

	{Opt_io_size_bits, "io_bits=%u"},

	{Opt_fault_injection, "fault_injection=%u"},

	{Opt_lazytime, "lazytime"},

	{Opt_nolazytime, "nolazytime"},
@@ -535,6 +537,17 @@ static int parse_options(struct super_block *sb, char *options) 
			}

			kfree(name);

			break;

		case Opt_io_size_bits:

			if (args->from && match_int(args, &arg))

				return -EINVAL;

			if (arg > __ilog2_u32(BIO_MAX_PAGES)) {

				f2fs_msg(sb, KERN_WARNING,

					"Not support %d, larger than %d",

					1 << arg, BIO_MAX_PAGES);

				return -EINVAL;

			}

			sbi->write_io_size_bits = arg;

			break;

		case Opt_fault_injection:

			if (args->from && match_int(args, &arg))

				return -EINVAL;
@@ -558,6 +571,13 @@ static int parse_options(struct super_block *sb, char *options) 
			return -EINVAL;

		}

	}



	if (F2FS_IO_SIZE_BITS(sbi) && !test_opt(sbi, LFS)) {

		f2fs_msg(sb, KERN_ERR,

				"Should set mode=lfs with %uKB-sized IO",

				F2FS_IO_SIZE_KB(sbi));

		return -EINVAL;

	}

	return 0;

}
@@ -918,6 +938,8 @@ static int f2fs_show_options(struct seq_file *seq, struct dentry *root) 
	else if (test_opt(sbi, LFS))

		seq_puts(seq, "lfs");

	seq_printf(seq, ",active_logs=%u", sbi->active_logs);

	if (F2FS_IO_SIZE_BITS(sbi))

		seq_printf(seq, ",io_size=%uKB", F2FS_IO_SIZE_KB(sbi));



	return 0;

}