linux-kernel - [PATCH 4.4 27/60] btrfs: make file clone aware of fatal signals

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Message-Id: <20170104200706.980597204@linuxfoundation.org>
Date:   Wed,  4 Jan 2017 21:47:12 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Wang Xiaoguang <wangxg.fnst@...fujitsu.com>,
        David Sterba <dsterba@...e.com>
Subject: [PATCH 4.4 27/60] btrfs: make file clone aware of fatal signals

4.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Wang Xiaoguang <wangxg.fnst@...fujitsu.com>

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@...fujitsu.com>
Reviewed-by: David Sterba <dsterba@...e.com>
Signed-off-by: David Sterba <dsterba@...e.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 fs/btrfs/ioctl.c |    5 +++++
 1 file changed, 5 insertions(+)

--- 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;