Make qemu-io commands available in HMP

It was decided to not make this command available in QMP in order to
make clear that this is not supposed to be a stable API and should be
used only for testing and debugging purposes.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

Makefile

@@ -186,7 +186,7 @@ qemu-img.o: qemu-img-cmds.h
 
 qemu-img$(EXESUF): qemu-img.o $(block-obj-y) libqemuutil.a libqemustub.a
 qemu-nbd$(EXESUF): qemu-nbd.o $(block-obj-y) libqemuutil.a libqemustub.a
-qemu-io$(EXESUF): qemu-io.o qemu-io-cmds.o $(block-obj-y) libqemuutil.a libqemustub.a
+qemu-io$(EXESUF): qemu-io.o $(block-obj-y) libqemuutil.a libqemustub.a
 
 qemu-bridge-helper$(EXESUF): qemu-bridge-helper.o
 

Makefile.objs

@@ -13,6 +13,7 @@ block-obj-$(CONFIG_POSIX) += aio-posix.o
 block-obj-$(CONFIG_WIN32) += aio-win32.o
 block-obj-y += block/
 block-obj-y += qapi-types.o qapi-visit.o
+block-obj-y += qemu-io-cmds.o
 
 block-obj-y += qemu-coroutine.o qemu-coroutine-lock.o qemu-coroutine-io.o
 block-obj-y += qemu-coroutine-sleep.o

hmp-commands.hx

@@ -1550,6 +1550,22 @@ STEXI
 
 Removes the chardev @var{id}.
 
+ETEXI
+
+    {
+        .name       = "qemu-io",
+        .args_type  = "device:B,command:s",
+        .params     = "[device] \"[command]\"",
+        .help       = "run a qemu-io command on a block device",
+        .mhandler.cmd = hmp_qemu_io,
+    },
+
+STEXI
+@item qemu-io @var{device} @var{command}
+@findex qemu-io
+
+Executes a qemu-io command on the given block device.
+
 ETEXI
 
     {

hmp.c

@@ -22,6 +22,7 @@
 #include "qemu/sockets.h"
 #include "monitor/monitor.h"
 #include "ui/console.h"
+#include "qemu-io.h"
 
 static void hmp_handle_error(Monitor *mon, Error **errp)
 {
@@ -1425,3 +1426,20 @@ void hmp_chardev_remove(Monitor *mon, const QDict *qdict)
     qmp_chardev_remove(qdict_get_str(qdict, "id"), &local_err);
     hmp_handle_error(mon, &local_err);
 }
+
+void hmp_qemu_io(Monitor *mon, const QDict *qdict)
+{
+    BlockDriverState *bs;
+    const char* device = qdict_get_str(qdict, "device");
+    const char* command = qdict_get_str(qdict, "command");
+    Error *err = NULL;
+
+    bs = bdrv_find(device);
+    if (bs) {
+        qemuio_command(bs, command);
+    } else {
+        error_set(&err, QERR_DEVICE_NOT_FOUND, device);
+    }
+
+    hmp_handle_error(mon, &err);
+}

hmp.h

@@ -85,5 +85,6 @@ void hmp_nbd_server_add(Monitor *mon, const QDict *qdict);
 void hmp_nbd_server_stop(Monitor *mon, const QDict *qdict);
 void hmp_chardev_add(Monitor *mon, const QDict *qdict);
 void hmp_chardev_remove(Monitor *mon, const QDict *qdict);
+void hmp_qemu_io(Monitor *mon, const QDict *qdict);
 
 #endif