f2fs: get io size bit from mount option (ec91538d) · Commits · 戴 / test

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

+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;
		}