btrfs: make file clone aware of fatal signals

Indeed this just make the behavior similar to xfs when process has
fatal signals pending, and it'll make fstests/generic/298 happy.

Signed-off-by: Wang Xiaoguang <wangxg.fnst@cn.fujitsu.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
(cherry picked from commit 78147c6ba4c3f46ce78501852487af6392bddb00)

diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index 4ffcf0c277397a7293b03e37c3313280f8c78b53..3903d71329064a06e38a30829c43f1a3efffd3b3 100644 (file)
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -3817,6 +3817,11 @@ process_slot:
                }
                btrfs_release_path(path);
                key.offset = next_key_min_offset;
+
+               if (fatal_signal_pending(current)) {
+                       ret = -EINTR;
+                       goto out;
+               }
        }
        ret = 0;