From: Jaegeuk Kim <jaegeuk@kernel.org>
Date: Mon, 18 Apr 2016 21:07:44 +0000 (-0400)
Subject: f2fs: issue cache flush on direct IO
X-Git-Tag: v4.7~303^2~53
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=6bfc49197eba070b799ab4ca8755d3a9fd1700da;p=platform%2Fkernel%2Flinux-amlogic.git

f2fs: issue cache flush on direct IO

Under direct IO path with O_(D)SYNC, it needs to set proper APPEND or UPDATE
flags, so taht f2fs_sync_file can make its data safe.

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

diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index e54489b..38ce5d6 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -673,6 +673,9 @@ next_block:
 					err = reserve_new_block(&dn);
 			} else {
 				err = __allocate_data_block(&dn);
+				if (!err)
+					set_inode_flag(F2FS_I(inode),
+							FI_APPEND_WRITE);
 			}
 			if (err)
 				goto sync_out;
@@ -1685,8 +1688,12 @@ static ssize_t f2fs_direct_IO(struct kiocb *iocb, struct iov_iter *iter,
 	trace_f2fs_direct_IO_enter(inode, offset, count, iov_iter_rw(iter));
 
 	err = blockdev_direct_IO(iocb, inode, iter, offset, get_data_block_dio);
-	if (err < 0 && iov_iter_rw(iter) == WRITE)
-		f2fs_write_failed(mapping, offset + count);
+	if (iov_iter_rw(iter) == WRITE) {
+		if (err > 0)
+			set_inode_flag(F2FS_I(inode), FI_UPDATE_WRITE);
+		else if (err < 0)
+			f2fs_write_failed(mapping, offset + count);
+	}
 
 	trace_f2fs_direct_IO_exit(inode, offset, count, iov_iter_rw(iter), err);