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Subject[PATCH 05/10] f2fs: get io size bit from mount option
Date
This patch adds to set io_size_bits from mount option.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
---
Documentation/filesystems/f2fs.txt | 2 ++
fs/f2fs/super.c | 22 ++++++++++++++++++++++
2 files changed, 24 insertions(+)

diff --git a/Documentation/filesystems/f2fs.txt b/Documentation/filesystems/f2fs.txt
index 753dd4f96afe..d99faced79cb 100644
--- a/Documentation/filesystems/f2fs.txt
+++ b/Documentation/filesystems/f2fs.txt
@@ -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
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index 692ff1b5adf5..f3697f97e527 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -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;
}
--
2.11.0
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