[Qemu-devel] [PATCH 1/4] Make vm_stop available for block layer

[Kevin Wolf]

blkqueue wants to stop the VM after an error has occurred, so we need to make
vm_stop available in common code. It now returns a boolean that tells if the VM
could be stopped, which is always true in qemu itself, and always false in the
tools.

Signed-off-by: Kevin Wolf <kw...@redhat.com>
---
 cpus.c        |    8 +++++---
 qemu-common.h |    3 +++
 qemu-tool.c   |    5 +++++
 sysemu.h      |    1 -
 4 files changed, 13 insertions(+), 4 deletions(-)

diff --git a/cpus.c b/cpus.c
index 91a0fb1..8ec0ed6 100644
--- a/cpus.c
+++ b/cpus.c
@@ -310,9 +310,10 @@ void qemu_notify_event(void)
 void qemu_mutex_lock_iothread(void) {}
 void qemu_mutex_unlock_iothread(void) {}
 
-void vm_stop(int reason)
+bool vm_stop(int reason)
 {
     do_vm_stop(reason);
+    return true;
 }
 
 #else /* CONFIG_IOTHREAD */
@@ -848,7 +849,7 @@ static void qemu_system_vmstop_request(int reason)
     qemu_notify_event();
 }
 
-void vm_stop(int reason)
+bool vm_stop(int reason)
 {
     QemuThread me;
     qemu_thread_self(&me);
@@ -863,9 +864,10 @@ void vm_stop(int reason)
             cpu_exit(cpu_single_env);
             cpu_single_env->stop = 1;
         }
-        return;
+        return true;
     }
     do_vm_stop(reason);
+    return true;
 }
 
 #endif
diff --git a/qemu-common.h b/qemu-common.h
index de82c2e..cb077a0 100644
--- a/qemu-common.h
+++ b/qemu-common.h
@@ -115,6 +115,9 @@ static inline char *realpath(const char *path, char 
*resolved_path)
 
 #endif /* !defined(NEED_CPU_H) */
 
+/* VM state */
+bool vm_stop(int reason);
+
 /* bottom halves */
 typedef void QEMUBHFunc(void *opaque);
 
diff --git a/qemu-tool.c b/qemu-tool.c
index 392e1c9..3926435 100644
--- a/qemu-tool.c
+++ b/qemu-tool.c
@@ -111,3 +111,8 @@ int qemu_set_fd_handler2(int fd,
 {
     return 0;
 }
+
+bool vm_stop(int reason)
+{
+    return false;
+}
diff --git a/sysemu.h b/sysemu.h
index b81a70e..77788f1 100644
--- a/sysemu.h
+++ b/sysemu.h
@@ -38,7 +38,6 @@ VMChangeStateEntry 
*qemu_add_vm_change_state_handler(VMChangeStateHandler *cb,
 void qemu_del_vm_change_state_handler(VMChangeStateEntry *e);
 
 void vm_start(void);
-void vm_stop(int reason);
 
 uint64_t ram_bytes_remaining(void);
 uint64_t ram_bytes_transferred(void);
-- 
1.7.2.3