sched: rt-group: interface

[sfrench/cifs-2.6.git] / kernel / user.c

diff --git a/kernel/user.c b/kernel/user.c
index bc1c48d35cb32726623b37b47a09d4325aaf4074..9f6d471bfd03a8e5630514ebda027d6c9378f14c 100644 (file)
--- a/kernel/user.c
+++ b/kernel/user.c
@@ -17,6 +17,14 @@
 #include <linux/module.h>
 #include <linux/user_namespace.h>
 
+struct user_namespace init_user_ns = {
+       .kref = {
+               .refcount       = ATOMIC_INIT(2),
+       },
+       .root_user = &root_user,
+};
+EXPORT_SYMBOL_GPL(init_user_ns);
+
 /*
  * UID task count cache, to get fast user lookup in "alloc_uid"
  * when changing user ID's (ie setuid() and friends).
@@ -156,9 +164,37 @@ static ssize_t cpu_shares_store(struct kobject *kobj,
 static struct kobj_attribute cpu_share_attr =
        __ATTR(cpu_share, 0644, cpu_shares_show, cpu_shares_store);
 
+static ssize_t cpu_rt_runtime_show(struct kobject *kobj,
+                                  struct kobj_attribute *attr,
+                                  char *buf)
+{
+       struct user_struct *up = container_of(kobj, struct user_struct, kobj);
+
+       return sprintf(buf, "%lu\n", sched_group_rt_runtime(up->tg));
+}
+
+static ssize_t cpu_rt_runtime_store(struct kobject *kobj,
+                                   struct kobj_attribute *attr,
+                                   const char *buf, size_t size)
+{
+       struct user_struct *up = container_of(kobj, struct user_struct, kobj);
+       unsigned long rt_runtime;
+       int rc;
+
+       sscanf(buf, "%lu", &rt_runtime);
+
+       rc = sched_group_set_rt_runtime(up->tg, rt_runtime);
+
+       return (rc ? rc : size);
+}
+
+static struct kobj_attribute cpu_rt_runtime_attr =
+       __ATTR(cpu_rt_runtime, 0644, cpu_rt_runtime_show, cpu_rt_runtime_store);
+
 /* default attributes per uid directory */
 static struct attribute *uids_attributes[] = {
        &cpu_share_attr.attr,
+       &cpu_rt_runtime_attr.attr,
        NULL
 };
 
@@ -427,6 +463,7 @@ void switch_uid(struct user_struct *new_user)
        suid_keys(current);
 }
 
+#ifdef CONFIG_USER_NS
 void release_uids(struct user_namespace *ns)
 {
        int i;
@@ -451,6 +488,7 @@ void release_uids(struct user_namespace *ns)
 
        free_uid(ns->root_user);
 }
+#endif
 
 static int __init uid_cache_init(void)
 {