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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 0a595ebaaa
commit ec91538dcc
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" mode=%s Control block allocation mode which supports "adaptive"
and "lfs". In "lfs" mode, there should be no random and "lfs". In "lfs" mode, there should be no random
writes towards main area. writes towards main area.
io_bits=%u Set the bit size of write IO requests. It should be set
with "mode=lfs".
================================================================================ ================================================================================
DEBUGFS ENTRIES DEBUGFS ENTRIES

22
fs/f2fs/super.c
View File

@ -101,6 +101,7 @@ enum {
Opt_noinline_data, Opt_noinline_data,
Opt_data_flush, Opt_data_flush,
Opt_mode, Opt_mode,
Opt_io_size_bits,
Opt_fault_injection, Opt_fault_injection,
Opt_lazytime, Opt_lazytime,
Opt_nolazytime, Opt_nolazytime,
@ -133,6 +134,7 @@ static match_table_t f2fs_tokens = {
{Opt_noinline_data, "noinline_data"}, {Opt_noinline_data, "noinline_data"},
{Opt_data_flush, "data_flush"}, {Opt_data_flush, "data_flush"},
{Opt_mode, "mode=%s"}, {Opt_mode, "mode=%s"},
{Opt_io_size_bits, "io_bits=%u"},
{Opt_fault_injection, "fault_injection=%u"}, {Opt_fault_injection, "fault_injection=%u"},
{Opt_lazytime, "lazytime"}, {Opt_lazytime, "lazytime"},
{Opt_nolazytime, "nolazytime"}, {Opt_nolazytime, "nolazytime"},
@ -535,6 +537,17 @@ static int parse_options(struct super_block *sb, char *options)
} }
kfree(name); kfree(name);
break; 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: case Opt_fault_injection:
if (args->from && match_int(args, &arg)) if (args->from && match_int(args, &arg))
return -EINVAL; return -EINVAL;
@ -558,6 +571,13 @@ static int parse_options(struct super_block *sb, char *options)
return -EINVAL; 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; return 0;
} }
@ -918,6 +938,8 @@ static int f2fs_show_options(struct seq_file *seq, struct dentry *root)
else if (test_opt(sbi, LFS)) else if (test_opt(sbi, LFS))
seq_puts(seq, "lfs"); seq_puts(seq, "lfs");
seq_printf(seq, ",active_logs=%u", sbi->active_logs); 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; return 0;
} }