f2fs: add offset check routine before punch_hole() in f2fs_fallocate()

In the punch_hole(), if offset bigger than inode size, it returns SUCCESS.
Then f2fs_fallocate() will update time and dirty mark.
In that case, inode has not been modified actually.
So I have added offset check routine that prevent to call the punch_hole().

Signed-off-by: Taehee Yoo <ap420073@gmail.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 2b52e48..3d6de54 100644 (file)
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -718,10 +718,6 @@ static int punch_hole(struct inode *inode, loff_t offset, loff_t len)
        if (!S_ISREG(inode->i_mode))
                return -EOPNOTSUPP;
 
-       /* skip punching hole beyond i_size */
-       if (offset >= inode->i_size)
-               return ret;
-
        if (f2fs_has_inline_data(inode)) {
                ret = f2fs_convert_inline_inode(inode);
                if (ret)
@@ -830,15 +826,19 @@ static long f2fs_fallocate(struct file *file, int mode,
                                loff_t offset, loff_t len)
 {
        struct inode *inode = file_inode(file);
-       long ret;
+       long ret = 0;
 
        if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE))
                return -EOPNOTSUPP;
 
        mutex_lock(&inode->i_mutex);
 
-       if (mode & FALLOC_FL_PUNCH_HOLE)
+       if (mode & FALLOC_FL_PUNCH_HOLE) {
+               if (offset >= inode->i_size)
+                       goto out;
+
                ret = punch_hole(inode, offset, len);
+       }
        else
                ret = expand_inode_data(inode, offset, len, mode);
 
@@ -847,6 +847,7 @@ static long f2fs_fallocate(struct file *file, int mode,
                mark_inode_dirty(inode);
        }
 
+out:
        mutex_unlock(&inode->i_mutex);
 
        trace_f2fs_fallocate(inode, mode, offset, len, ret);