*
*/
-#include <linux/config.h>
#include <linux/kobject.h>
#include <linux/string.h>
#include <linux/sysfs.h>
#include <linux/module.h>
#include <linux/init.h>
+#include <linux/kexec.h>
#define KERNEL_ATTR_RO(_name) \
static struct subsys_attribute _name##_attr = __ATTR_RO(_name)
static struct subsys_attribute _name##_attr = \
__ATTR(_name, 0644, _name##_show, _name##_store)
-#ifdef CONFIG_HOTPLUG
-static ssize_t hotplug_seqnum_show(struct subsystem *subsys, char *page)
+#if defined(CONFIG_HOTPLUG) && defined(CONFIG_NET)
+/* current uevent sequence number */
+static ssize_t uevent_seqnum_show(struct subsystem *subsys, char *page)
{
- return sprintf(page, "%llu\n", (unsigned long long)hotplug_seqnum);
+ return sprintf(page, "%llu\n", (unsigned long long)uevent_seqnum);
}
-KERNEL_ATTR_RO(hotplug_seqnum);
+KERNEL_ATTR_RO(uevent_seqnum);
+
+/* uevent helper program, used during early boo */
+static ssize_t uevent_helper_show(struct subsystem *subsys, char *page)
+{
+ return sprintf(page, "%s\n", uevent_helper);
+}
+static ssize_t uevent_helper_store(struct subsystem *subsys, const char *page, size_t count)
+{
+ if (count+1 > UEVENT_HELPER_PATH_LEN)
+ return -ENOENT;
+ memcpy(uevent_helper, page, count);
+ uevent_helper[count] = '\0';
+ if (count && uevent_helper[count-1] == '\n')
+ uevent_helper[count-1] = '\0';
+ return count;
+}
+KERNEL_ATTR_RW(uevent_helper);
#endif
-static decl_subsys(kernel, NULL, NULL);
+#ifdef CONFIG_KEXEC
+static ssize_t kexec_loaded_show(struct subsystem *subsys, char *page)
+{
+ return sprintf(page, "%d\n", !!kexec_image);
+}
+KERNEL_ATTR_RO(kexec_loaded);
+
+static ssize_t kexec_crash_loaded_show(struct subsystem *subsys, char *page)
+{
+ return sprintf(page, "%d\n", !!kexec_crash_image);
+}
+KERNEL_ATTR_RO(kexec_crash_loaded);
+#endif /* CONFIG_KEXEC */
+
+decl_subsys(kernel, NULL, NULL);
+EXPORT_SYMBOL_GPL(kernel_subsys);
static struct attribute * kernel_attrs[] = {
-#ifdef CONFIG_HOTPLUG
- &hotplug_seqnum_attr.attr,
+#if defined(CONFIG_HOTPLUG) && defined(CONFIG_NET)
+ &uevent_seqnum_attr.attr,
+ &uevent_helper_attr.attr,
+#endif
+#ifdef CONFIG_KEXEC
+ &kexec_loaded_attr.attr,
+ &kexec_crash_loaded_attr.attr,
#endif
NULL
};