From: Chao Yu <chao2.yu@samsung.com>
Date: Mon, 15 Sep 2014 10:03:32 +0000 (+0800)
Subject: f2fs: skip punching hole in special condition
X-Git-Tag: Ubuntu-snapdragon-4.4.0-1029.32~7941^2~14
X-Git-Url: https://git.proxmox.com/?a=commitdiff_plain;h=14cecc5cd6ed33ef3cb7328de904cc636dd390a4;p=mirror_ubuntu-zesty-kernel.git

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@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
---

diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index a95ba23e3bd3..ac8c6804097f 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -658,6 +658,13 @@ 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;