[Xen-changelog] [xen-unstable] New /sys/hypervisor/uuid, containing this domain's UUID.

[Xen patchbot-unstable <patchbot-unstable@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User kaf24@xxxxxxxxxxxxxxxxxxxx
# Node ID bd408087629788124c70bfcfadfdab246dd71a53
# Parent  d49e5cc672ebf3d661adcc72d277c2d317812bf1
New /sys/hypervisor/uuid, containing this domain's UUID.
Signed-off-by: Markus Armbruster <armbru@xxxxxxxxxx>
---
 linux-2.6-xen-sparse/drivers/xen/core/xen_sysfs.c |   39 ++++++++++++++++++++++
 1 files changed, 39 insertions(+)

diff -r d49e5cc672eb -r bd4080876297 
linux-2.6-xen-sparse/drivers/xen/core/xen_sysfs.c
--- a/linux-2.6-xen-sparse/drivers/xen/core/xen_sysfs.c Wed Jun 28 20:46:01 
2006 +0100
+++ b/linux-2.6-xen-sparse/drivers/xen/core/xen_sysfs.c Wed Jun 28 21:03:25 
2006 +0100
@@ -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>");
@@ -95,6 +97,37 @@ 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_NIL, "vm", "", NULL);
+       if (IS_ERR(vm))
+               return PTR_ERR(vm);
+       val = xenbus_read(XBT_NIL, 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 */
@@ -314,10 +347,15 @@ 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();
@@ -331,6 +369,7 @@ 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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