linux-kernel - [PATCH 4/7] f2fs: report unwritten status in fsync_node

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Date:	Mon, 25 Apr 2016 17:06:57 -0700
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 4/7] f2fs: report unwritten status in fsync_node_pages

The fsync_node_pages should return pass or failure so that user could know
fsync is completed or not.

Signed-off-by: Jaegeuk Kim <jaegeuk@...nel.org>
---
 fs/f2fs/file.c |  4 +++-
 fs/f2fs/node.c | 13 ++++++-------
 2 files changed, 9 insertions(+), 8 deletions(-)

diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 3d53ee0..60fd64c 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -256,7 +256,9 @@ go_write:
 		goto out;
 	}
 sync_nodes:
-	fsync_node_pages(sbi, ino, &wbc);
+	ret = fsync_node_pages(sbi, ino, &wbc);
+	if (ret)
+		goto out;
 
 	/* if cp_error was enabled, we should avoid infinite loop */
 	if (unlikely(f2fs_cp_error(sbi))) {
diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
index 675b730..8a1e211 100644
--- a/fs/f2fs/node.c
+++ b/fs/f2fs/node.c
@@ -1227,7 +1227,7 @@ int fsync_node_pages(struct f2fs_sb_info *sbi, nid_t ino,
 {
 	pgoff_t index, end;
 	struct pagevec pvec;
-	int nwritten = 0;
+	int ret = 0;
 
 	pagevec_init(&pvec, 0);
 	index = 0;
@@ -1278,21 +1278,20 @@ continue_unlock:
 			if (IS_INODE(page))
 				set_dentry_mark(page,
 						need_dentry_mark(sbi, ino));
-			nwritten++;
 
-			if (NODE_MAPPING(sbi)->a_ops->writepage(page, wbc))
+			ret = NODE_MAPPING(sbi)->a_ops->writepage(page, wbc);
+			if (ret) {
 				unlock_page(page);
-
-			if (--wbc->nr_to_write == 0)
 				break;
+			}
 		}
 		pagevec_release(&pvec);
 		cond_resched();
 
-		if (wbc->nr_to_write == 0)
+		if (ret)
 			break;
 	}
-	return nwritten;
+	return ret ? -EIO: 0;
 }
 
 int sync_node_pages(struct f2fs_sb_info *sbi, struct writeback_control *wbc)
-- 
2.6.3