f2fs: fix to check atomic_file in f2fs ioctl interfaces

commit bfe5c02 upstream.

Some f2fs ioctl interfaces like f2fs_ioc_set_pin_file(),
f2fs_move_file_range(), and f2fs_defragment_range() missed to
check atomic_write status, which may cause potential race issue,
fix it.

Cc: stable@vger.kernel.org
Signed-off-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Author: chaseyu

fs/f2fs/file.c

@@ -2716,7 +2716,8 @@ static int f2fs_defragment_range(struct f2fs_sb_info *sbi,
 				(range->start + range->len) >> PAGE_SHIFT,
 				DIV_ROUND_UP(i_size_read(inode), PAGE_SIZE));
 
-	if (is_inode_flag_set(inode, FI_COMPRESS_RELEASED)) {
+	if (is_inode_flag_set(inode, FI_COMPRESS_RELEASED) ||
+		f2fs_is_atomic_file(inode)) {
 		err = -EINVAL;
 		goto unlock_out;
 	}
@@ -2949,6 +2950,11 @@ static int f2fs_move_file_range(struct file *file_in, loff_t pos_in,
 		goto out_unlock;
 	}
 
+	if (f2fs_is_atomic_file(src) || f2fs_is_atomic_file(dst)) {
+		ret = -EINVAL;
+		goto out_unlock;
+	}
+
 	ret = -EINVAL;
 	if (pos_in + len > src->i_size || pos_in + len < pos_in)
 		goto out_unlock;
@@ -3332,6 +3338,11 @@ static int f2fs_ioc_set_pin_file(struct file *filp, unsigned long arg)
 
 	inode_lock(inode);
 
+	if (f2fs_is_atomic_file(inode)) {
+		ret = -EINVAL;
+		goto out;
+	}
+
 	if (!pin) {
 		clear_inode_flag(inode, FI_PIN_FILE);
 		f2fs_i_gc_failures_write(inode, 0);