Qemu is expected to quit if the same boot index value is used by two devices. However, hot-plugging a device with a bootindex value already used should fail with a friendly message rather than quitting a running VM.
Signed-off-by: Marcel Apfelbaum <marce...@redhat.com> --- qdev-monitor.c | 33 +++++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+) diff --git a/qdev-monitor.c b/qdev-monitor.c index 410cdcb..654d086 100644 --- a/qdev-monitor.c +++ b/qdev-monitor.c @@ -24,6 +24,7 @@ #include "qmp-commands.h" #include "sysemu/arch_init.h" #include "qemu/config-file.h" +#include "sysemu/sysemu.h" /* * Aliases were a bad idea from the start. Let's keep them @@ -442,6 +443,31 @@ static BusState *qbus_find(const char *path) } } +#define OBJ_PROP_BOOTINDEX "bootindex" + +static bool bootindex_colision(Object *obj, QemuOpts *opts) +{ + int32_t bootindex; + + if (!object_property_find(obj, OBJ_PROP_BOOTINDEX, NULL)) { + return false; + } + + /* avoid parsing by setting the property and then getting it typed */ + object_property_parse(obj, qemu_opt_get(opts, OBJ_PROP_BOOTINDEX), + OBJ_PROP_BOOTINDEX, NULL); + bootindex = (int32_t)object_property_get_int(obj, OBJ_PROP_BOOTINDEX, + NULL); + + if (bootindex >= 0) { + if (get_boot_device(bootindex)) { + return true; + } + } + + return false; +} + DeviceState *qdev_device_add(QemuOpts *opts) { ObjectClass *obj; @@ -502,6 +528,13 @@ DeviceState *qdev_device_add(QemuOpts *opts) /* create device, set properties */ qdev = DEVICE(object_new(driver)); + if (qdev_hotplug && bootindex_colision(OBJECT(qdev), opts)) { + qerror_report(QERR_INVALID_PARAMETER_VALUE, + "bootindex", "an unused boot index value"); + qdev_free(qdev); + return NULL; + } + if (bus) { qdev_set_parent_bus(qdev, bus); } -- 1.8.3.1