From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sat, 16 Apr 2005 15:20:36 -0700 Subject: Linux-2.6.12-rc2 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! --- net/ipv4/multipath.c | 55 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 55 insertions(+) create mode 100644 net/ipv4/multipath.c (limited to 'net/ipv4/multipath.c') diff --git a/net/ipv4/multipath.c b/net/ipv4/multipath.c new file mode 100644 index 00000000000..4e9ca7c7640 --- /dev/null +++ b/net/ipv4/multipath.c @@ -0,0 +1,55 @@ +/* multipath.c: IPV4 multipath algorithm support. + * + * Copyright (C) 2004, 2005 Einar Lueck + * Copyright (C) 2005 David S. Miller + */ + +#include +#include +#include +#include + +#include + +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); -- cgit v1.2.3