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From 27fe3b8d42a2c99de01ce20e4b0727079c12da65 Mon Sep 17 00:00:00 2001
From: Kevin Wolf <kwolf@redhat.com>
Date: Mon, 24 Feb 2020 16:57:09 +0000
Subject: [PATCH 8/9] mirror: Store MirrorOp.co for debuggability

RH-Author: Kevin Wolf <kwolf@redhat.com>
Message-id: <20200224165710.4830-2-kwolf@redhat.com>
Patchwork-id: 94044
O-Subject: [RHEL-AV-8.2.0 qemu-kvm PATCH 1/2] mirror: Store MirrorOp.co for debuggability
Bugzilla: 1794692
RH-Acked-by: John Snow <jsnow@redhat.com>
RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
RH-Acked-by: Max Reitz <mreitz@redhat.com>

If a coroutine is launched, but the coroutine pointer isn't stored
anywhere, debugging any problems inside the coroutine is quite hard.
Let's store the coroutine pointer of a mirror operation in MirrorOp to
have it available in the debugger.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
(cherry picked from commit eed325b92c3e68417121ea23f96e33af6a4654ed)
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
---
 block/mirror.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/block/mirror.c b/block/mirror.c
index f0f2d9d..8959e42 100644
--- a/block/mirror.c
+++ b/block/mirror.c
@@ -103,6 +103,7 @@ struct MirrorOp {
     bool is_pseudo_op;
     bool is_active_write;
     CoQueue waiting_requests;
+    Coroutine *co;
 
     QTAILQ_ENTRY(MirrorOp) next;
 };
@@ -429,6 +430,7 @@ static unsigned mirror_perform(MirrorBlockJob *s, int64_t offset,
     default:
         abort();
     }
+    op->co = co;
 
     QTAILQ_INSERT_TAIL(&s->ops_in_flight, op, next);
     qemu_coroutine_enter(co);
-- 
1.8.3.1