linux-kernel - Re: [PATCH v2] f2fs: LFS mode does not support ATGC

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Message-ID: <YwAiZTYkFi/EP/Ls@google.com>
Date:   Fri, 19 Aug 2022 16:53:09 -0700
From:   Jaegeuk Kim <jaegeuk@...nel.org>
To:     linux-kernel@...r.kernel.org,
        linux-f2fs-devel@...ts.sourceforge.net
Subject: Re: [PATCH v2] f2fs: LFS mode does not support ATGC

ATGC is using SSR which violates LFS mode used by zoned device.

Signed-off-by: Jaegeuk Kim <jaegeuk@...nel.org>
---

 Change log from v1:
  - check LFS mode

 fs/f2fs/super.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index 2451623c05a7..fe462484f5fa 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -1342,6 +1342,11 @@ static int parse_options(struct super_block *sb, char *options, bool is_remount)
 		return -EINVAL;
 	}
 
+	if (test_opt(sbi, ATGC) && f2fs_lfs_mode(sbi)) {
+		f2fs_err(sbi, "LFS not compatible with ATGC");
+		return -EINVAL;
+	}
+
 	if (f2fs_sb_has_readonly(sbi) && !f2fs_readonly(sbi->sb)) {
 		f2fs_err(sbi, "Allow to mount readonly mode only");
 		return -EROFS;
-- 
2.37.1.595.g718a3a8f04-goog