f2fs: introduce CP_TRIMMED_FLAG to avoid unneeded discard

Introduce CP_TRIMMED_FLAG to indicate all invalid block were trimmed
before umount, so once we do mount with image which contain the flag,
we don't record invalid blocks as undiscard one, when fstrim is being
triggered, we can avoid issuing redundant discard commands.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index 37360b9ad263..f0481fb52142 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -130,6 +130,7 @@ enum {
 #define CP_SYNC         0x00000004
 #define CP_RECOVERY     0x00000008
 #define CP_DISCARD      0x00000010
+#define CP_TRIMMED      0x00000020
 
 #define DEF_BATCHED_TRIM_SECTIONS       2048
 #define BATCHED_TRIM_SEGMENTS(sbi)      \