From 094a22399f1b3e796727fc7e584c7a1f2beca24b Mon Sep 17 00:00:00 2001 From: Paul Durrant Date: Tue, 8 Jan 2019 14:48:49 +0000 Subject: xen: create xenstore areas for XenDevice-s This patch adds a new source module, xen-bus-helper.c, which builds on basic libxenstore primitives to provide functions to create (setting permissions appropriately) and destroy xenstore areas, and functions to 'printf' and 'scanf' nodes therein. The main xen-bus code then uses these primitives [1] to initialize and destroy the frontend and backend areas for a XenDevice during realize and unrealize respectively. The 'xen-block' implementation is extended with a 'get_name' method that returns the VBD number. This number is required to 'name' the xenstore areas. NOTE: An exit handler is also added to make sure the xenstore areas are cleaned up if QEMU terminates without devices being unrealized. [1] The 'scanf' functions are actually not yet needed, but they will be needed by code delivered in subsequent patches. Signed-off-by: Paul Durrant Reviewed-by: Anthony Perard Signed-off-by: Anthony PERARD --- include/hw/xen/xen-bus.h | 12 ++++++++++++ 1 file changed, 12 insertions(+) (limited to 'include/hw/xen/xen-bus.h') diff --git a/include/hw/xen/xen-bus.h b/include/hw/xen/xen-bus.h index 0cb12464ce..85a75d8dec 100644 --- a/include/hw/xen/xen-bus.h +++ b/include/hw/xen/xen-bus.h @@ -8,12 +8,19 @@ #ifndef HW_XEN_BUS_H #define HW_XEN_BUS_H +#include "hw/xen/xen_common.h" #include "hw/sysbus.h" typedef struct XenDevice { DeviceState qdev; + domid_t frontend_id; + char *name; + char *backend_path, *frontend_path; + enum xenbus_state backend_state, frontend_state; + Notifier exit; } XenDevice; +typedef char *(*XenDeviceGetName)(XenDevice *xendev, Error **errp); typedef void (*XenDeviceRealize)(XenDevice *xendev, Error **errp); typedef void (*XenDeviceUnrealize)(XenDevice *xendev, Error **errp); @@ -21,6 +28,9 @@ typedef struct XenDeviceClass { /*< private >*/ DeviceClass parent_class; /*< public >*/ + const char *backend; + const char *device; + XenDeviceGetName get_name; XenDeviceRealize realize; XenDeviceUnrealize unrealize; } XenDeviceClass; @@ -35,6 +45,8 @@ typedef struct XenDeviceClass { typedef struct XenBus { BusState qbus; + domid_t backend_id; + struct xs_handle *xsh; } XenBus; typedef struct XenBusClass { -- cgit v1.2.3