[PATCH 6.1 120/127] f2fs: fix to set flush_merge opt and show noflush_merge

Greg Kroah-Hartman
2023-08-09T10:56:48Z

From: Yangtao Li <frank.li@vivo.com>

[ Upstream commit 967eaad1fed5f6335ea97a47d45214744dc57925 ]

Some minor modifications to flush_merge and related parameters:

1.The FLUSH_MERGE opt is set by default only in non-ro mode.
2.When ro and merge are set at the same time, an error is reported.
3.Display noflush_merge mount opt.

Suggested-by: Chao Yu <chao@kernel.org>
Signed-off-by: Yangtao Li <frank.li@vivo.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Stable-dep-of: 458c15dfbce6 ("f2fs: don't reset unchangable mount option in f2fs_remount()")
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
fs/f2fs/super.c | 13 +++++++++++--
1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index b6dad389fa144..36bb1c969e8bb 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -1347,6 +1347,12 @@ static int parse_options(struct super_block *sb, char *options, bool is_remount)
return -EINVAL;
}

+ if ((f2fs_sb_has_readonly(sbi) || f2fs_readonly(sbi->sb)) &&
+ test_opt(sbi, FLUSH_MERGE)) {
+ f2fs_err(sbi, "FLUSH_MERGE not compatible with readonly mode");
+ return -EINVAL;
+ }
+
if (f2fs_sb_has_readonly(sbi) && !f2fs_readonly(sbi->sb)) {
f2fs_err(sbi, "Allow to mount readonly mode only");
return -EROFS;
@@ -1933,8 +1939,10 @@ static int f2fs_show_options(struct seq_file *seq, struct dentry *root)
seq_puts(seq, ",inline_dentry");
else
seq_puts(seq, ",noinline_dentry");
- if (!f2fs_readonly(sbi->sb) && test_opt(sbi, FLUSH_MERGE))
+ if (test_opt(sbi, FLUSH_MERGE))
seq_puts(seq, ",flush_merge");
+ else
+ seq_puts(seq, ",noflush_merge");
if (test_opt(sbi, NOBARRIER))
seq_puts(seq, ",nobarrier");
if (test_opt(sbi, FASTBOOT))
@@ -2063,7 +2071,8 @@ static void default_options(struct f2fs_sb_info *sbi)
set_opt(sbi, MERGE_CHECKPOINT);
F2FS_OPTION(sbi).unusable_cap = 0;
sbi->sb->s_flags |= SB_LAZYTIME;
- set_opt(sbi, FLUSH_MERGE);
+ if (!f2fs_sb_has_readonly(sbi) && !f2fs_readonly(sbi->sb))
+ set_opt(sbi, FLUSH_MERGE);
if (f2fs_hw_support_discard(sbi) || f2fs_hw_should_discard(sbi))
set_opt(sbi, DISCARD);
if (f2fs_sb_has_blkzoned(sbi)) {
--
2.40.1