mirror of
https://github.com/adulau/aha.git
synced 2024-12-30 20:56:23 +00:00
1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
55 lines
1.2 KiB
C
55 lines
1.2 KiB
C
/* multipath.c: IPV4 multipath algorithm support.
|
|
*
|
|
* Copyright (C) 2004, 2005 Einar Lueck <elueck@de.ibm.com>
|
|
* Copyright (C) 2005 David S. Miller <davem@davemloft.net>
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/netdevice.h>
|
|
#include <linux/spinlock.h>
|
|
|
|
#include <net/ip_mp_alg.h>
|
|
|
|
static DEFINE_SPINLOCK(alg_table_lock);
|
|
struct ip_mp_alg_ops *ip_mp_alg_table[IP_MP_ALG_MAX + 1];
|
|
|
|
int multipath_alg_register(struct ip_mp_alg_ops *ops, enum ip_mp_alg n)
|
|
{
|
|
struct ip_mp_alg_ops **slot;
|
|
int err;
|
|
|
|
if (n < IP_MP_ALG_NONE || n > IP_MP_ALG_MAX ||
|
|
!ops->mp_alg_select_route)
|
|
return -EINVAL;
|
|
|
|
spin_lock(&alg_table_lock);
|
|
slot = &ip_mp_alg_table[n];
|
|
if (*slot != NULL) {
|
|
err = -EBUSY;
|
|
} else {
|
|
*slot = ops;
|
|
err = 0;
|
|
}
|
|
spin_unlock(&alg_table_lock);
|
|
|
|
return err;
|
|
}
|
|
EXPORT_SYMBOL(multipath_alg_register);
|
|
|
|
void multipath_alg_unregister(struct ip_mp_alg_ops *ops, enum ip_mp_alg n)
|
|
{
|
|
struct ip_mp_alg_ops **slot;
|
|
|
|
if (n < IP_MP_ALG_NONE || n > IP_MP_ALG_MAX)
|
|
return;
|
|
|
|
spin_lock(&alg_table_lock);
|
|
slot = &ip_mp_alg_table[n];
|
|
if (*slot == ops)
|
|
*slot = NULL;
|
|
spin_unlock(&alg_table_lock);
|
|
|
|
synchronize_net();
|
|
}
|
|
EXPORT_SYMBOL(multipath_alg_unregister);
|