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f2fs: get io size bit from mount option 

This patch adds to set io_size_bits from mount option.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Jaegeuk Kim 2016-12-21 17:09:19 -08:00
parent c19a502449
commit 640b8ef9c0
2 changed files with 24 additions and 0 deletions
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2
Documentation/filesystems/f2fs.txt
View File

@ -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
fs/f2fs/super.c
View File

@ -100,6 +100,7 @@ enum {
Opt_noinline_data,
Opt_data_flush,
Opt_mode,
Opt_io_size_bits,
Opt_fault_injection,
Opt_err,
};
@ -130,6 +131,7 @@ 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_err, NULL},
};
@ -530,6 +532,17 @@ 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;
@ -547,6 +560,13 @@ 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;
}
@ -904,6 +924,8 @@ 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;
}