grace.c

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/*
 * Common code for control of lockd and nfsv4 grace periods.
 */

#include <linux/module.h>
#include <linux/lockd/bind.h>
#include <net/net_namespace.h>

#include "netns.h"

static DEFINE_SPINLOCK(grace_lock);

void locks_start_grace(struct net *net, struct lock_manager *lm)
{
    struct lockd_net *ln = net_generic(net, lockd_net_id);

    spin_lock(&grace_lock);
    list_add(&lm->list, &ln->grace_list);
    spin_unlock(&grace_lock);
}
EXPORT_SYMBOL_GPL(locks_start_grace);

void locks_end_grace(struct lock_manager *lm)
{
    spin_lock(&grace_lock);
    list_del_init(&lm->list);
    spin_unlock(&grace_lock);
}
EXPORT_SYMBOL_GPL(locks_end_grace);

int locks_in_grace(struct net *net)
{
    struct lockd_net *ln = net_generic(net, lockd_net_id);

    return !list_empty(&ln->grace_list);
}
EXPORT_SYMBOL_GPL(locks_in_grace);