/*
* Common code for control of lockd and nfsv4 grace periods.
+ *
+ * Transplanted from lockd code
*/
#include <linux/module.h>
-#include <linux/lockd/bind.h>
#include <net/net_namespace.h>
+#include <net/netns/generic.h>
+#include <linux/fs.h>
-#include "netns.h"
-
+static int grace_net_id;
static DEFINE_SPINLOCK(grace_lock);
/**
* locks_start_grace
+ * @net: net namespace that this lock manager belongs to
* @lm: who this grace period is for
*
* A grace period is a period during which locks should not be given
*
* This function is called to start a grace period.
*/
-void locks_start_grace(struct net *net, struct lock_manager *lm)
+void
+locks_start_grace(struct net *net, struct lock_manager *lm)
{
- struct lockd_net *ln = net_generic(net, lockd_net_id);
+ struct list_head *grace_list = net_generic(net, grace_net_id);
spin_lock(&grace_lock);
- list_add(&lm->list, &ln->grace_list);
+ list_add(&lm->list, grace_list);
spin_unlock(&grace_lock);
}
EXPORT_SYMBOL_GPL(locks_start_grace);
/**
* locks_end_grace
+ * @net: net namespace that this lock manager belongs to
* @lm: who this grace period is for
*
* Call this function to state that the given lock manager is ready to
* Note that callers count on it being safe to call this more than once,
* and the second call should be a no-op.
*/
-void locks_end_grace(struct lock_manager *lm)
+void
+locks_end_grace(struct lock_manager *lm)
{
spin_lock(&grace_lock);
list_del_init(&lm->list);
* to answer ordinary lock requests, and when they should accept only
* lock reclaims.
*/
-int locks_in_grace(struct net *net)
+int
+locks_in_grace(struct net *net)
{
- struct lockd_net *ln = net_generic(net, lockd_net_id);
+ struct list_head *grace_list = net_generic(net, grace_net_id);
- return !list_empty(&ln->grace_list);
+ return !list_empty(grace_list);
}
EXPORT_SYMBOL_GPL(locks_in_grace);
+
+static int __net_init
+grace_init_net(struct net *net)
+{
+ struct list_head *grace_list = net_generic(net, grace_net_id);
+
+ INIT_LIST_HEAD(grace_list);
+ return 0;
+}
+
+static void __net_exit
+grace_exit_net(struct net *net)
+{
+ struct list_head *grace_list = net_generic(net, grace_net_id);
+
+ BUG_ON(!list_empty(grace_list));
+}
+
+static struct pernet_operations grace_net_ops = {
+ .init = grace_init_net,
+ .exit = grace_exit_net,
+ .id = &grace_net_id,
+ .size = sizeof(struct list_head),
+};
+
+static int __init
+init_grace(void)
+{
+ return register_pernet_subsys(&grace_net_ops);
+}
+
+static void __exit
+exit_grace(void)
+{
+ unregister_pernet_subsys(&grace_net_ops);
+}
+
+MODULE_AUTHOR("Jeff Layton <jlayton@primarydata.com>");
+MODULE_LICENSE("GPL");
+module_init(init_grace)
+module_exit(exit_grace)