From: Wang Xiaoguang <wangxg.fnst@cn.fujitsu.com>
Date: Thu, 13 Oct 2016 01:23:39 +0000 (+0800)
Subject: btrfs: make file clone aware of fatal signals
X-Git-Tag: firefly_0821_release~176^2~4^2~7^2~35
X-Git-Url: http://plrg.eecs.uci.edu/git/?a=commitdiff_plain;h=85cfbd9db2c6e0d213e5c28b04c8ca1820000533;p=firefly-linux-kernel-4.4.55.git

btrfs: make file clone aware of fatal signals

commit 69ae5e4459e43e56f03d0987e865fbac2b05af2a upstream.

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index a7e18dbadf74..317b99acdf4b 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -3825,6 +3825,11 @@ process_slot:
 		}
 		btrfs_release_path(path);
 		key.offset = next_key_min_offset;
+
+		if (fatal_signal_pending(current)) {
+			ret = -EINTR;
+			goto out;
+		}
 	}
 	ret = 0;