linux-kernel - [PATCH 2/2] f2fs: allow dio read for LFS mode

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Date:   Fri, 11 Nov 2016 13:03:04 -0800
From:   Jaegeuk Kim <jaegeuk@...nel.org>
To:     linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        linux-f2fs-devel@...ts.sourceforge.net
Cc:     Jaegeuk Kim <jaegeuk@...nel.org>
Subject: [PATCH 2/2] f2fs: allow dio read for LFS mode

We can allow dio reads for LFS mode, while doing buffered writes for dio writes.

Signed-off-by: Jaegeuk Kim <jaegeuk@...nel.org>
---
 fs/f2fs/data.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index ca53da5..996b9ae 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -1732,7 +1732,7 @@ static ssize_t f2fs_direct_IO(struct kiocb *iocb, struct iov_iter *iter)
 
 	if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode))
 		return 0;
-	if (test_opt(F2FS_I_SB(inode), LFS))
+	if (rw == WRITE && test_opt(F2FS_I_SB(inode), LFS))
 		return 0;
 
 	trace_f2fs_direct_IO_enter(inode, offset, count, rw);
-- 
2.8.3