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>

1 files changed, 7 insertions, 0 deletions

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;