New /sys/hypervisor/uuid, containing this domain's UUID.
Signed-off-by: Markus Armbruster <armbru@xxxxxxxxxx>
---
Second try, using the newly available /vm/<UUID>/uuid key.
diff -r ddba92a5cba9 drivers/xen/core/xen_sysfs.c
--- a/drivers/xen/core/xen_sysfs.c Tue May 09 12:41:38 2006 +0200
+++ b/drivers/xen/core/xen_sysfs.c Wed May 24 14:53:25 2006 +0200
@@ -8,12 +8,14 @@
 */
 
 #include <linux/config.h>
+#include <linux/err.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/init.h>
 #include <asm/hypervisor.h>
 #include <xen/features.h>
 #include <xen/hypervisor_sysfs.h>
+#include <xen/xenbus.h>
 
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Mike D. Day <ncmike@xxxxxxxxxx>");
@@ -92,6 +94,37 @@ static void xen_sysfs_version_destroy(vo
 static void xen_sysfs_version_destroy(void)
 {
 sysfs_remove_group(&hypervisor_subsys.kset.kobj, &version_group);
+}
+
+/* UUID */
+
+static ssize_t uuid_show(struct hyp_sysfs_attr *attr, char *buffer)
+{
+ char *vm, *val;
+ int ret;
+
+ vm = xenbus_read(XBT_NULL, "vm", "", NULL);
+ if (IS_ERR(vm))
+ return PTR_ERR(vm);
+ val = xenbus_read(XBT_NULL, vm, "uuid", NULL);
+ kfree(vm);
+ if (IS_ERR(val))
+ return PTR_ERR(val);
+ ret = sprintf(buffer, "%s\n", val);
+ kfree(val);
+ return ret;
+}
+
+HYPERVISOR_ATTR_RO(uuid);
+
+static int __init xen_sysfs_uuid_init(void)
+{
+ return sysfs_create_file(&hypervisor_subsys.kset.kobj, &uuid_attr.attr);
+}
+
+static void xen_sysfs_uuid_destroy(void)
+{
+ sysfs_remove_file(&hypervisor_subsys.kset.kobj, &uuid_attr.attr);
 }
 
 /* xen compilation attributes */
@@ -285,10 +318,15 @@ static int __init hyper_sysfs_init(void)
 ret = xen_compilation_init();
 if (ret)
 goto comp_out;
+ ret = xen_sysfs_uuid_init();
+ if (ret)
+ goto uuid_out;
 ret = xen_properties_init();
 if (!ret)
 goto out;
 
+ xen_sysfs_uuid_destroy();
+uuid_out:
 xen_compilation_destroy();
 comp_out:
 xen_sysfs_version_destroy();
@@ -302,6 +340,7 @@ static void hyper_sysfs_exit(void)
 {
 xen_properties_destroy();
 xen_compilation_destroy();
+ xen_sysfs_uuid_destroy();
 xen_sysfs_version_destroy();
 xen_sysfs_type_destroy();
 
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