linux-kernel - [f2fs-dev][PATCH 3/5] f2fs: skip punching hole in special condition

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Date:	Mon, 15 Sep 2014 18:03:32 +0800
From:	Chao Yu <chao2.yu@...sung.com>
To:	Jaegeuk Kim <jaegeuk@...nel.org>,
	Changman Lee <cm224.lee@...sung.com>
Cc:	linux-f2fs-devel@...ts.sourceforge.net,
	linux-kernel@...r.kernel.org
Subject: [f2fs-dev][PATCH 3/5] f2fs: skip punching hole in special condition

Now punching hole in directory is not supported in f2fs, so let's limit file
type in punch_hole().

In addition, in punch_hole if offset is exceed file size, we should skip
punching hole.

Signed-off-by: Chao Yu <chao2.yu@...sung.com>
---
 fs/f2fs/file.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 7b34101..ecf94e1 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -645,6 +645,13 @@ static int punch_hole(struct inode *inode, loff_t offset, loff_t len)
 	loff_t off_start, off_end;
 	int ret = 0;
 
+	if (!S_ISREG(inode->i_mode))
+		return -EOPNOTSUPP;
+
+	/* skip punching hole beyond i_size */
+	if (offset >= inode->i_size)
+		return ret;
+
 	ret = f2fs_convert_inline_data(inode, MAX_INLINE_DATA + 1, NULL);
 	if (ret)
 		return ret;
-- 
2.0.1.474.g72c7794


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