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author | 2005-04-16 15:20:36 -0700 | |
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committer | 2005-04-16 15:20:36 -0700 | |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /include/net/ip_mp_alg.h | |
download | linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.bz2 linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.zip |
Linux-2.6.12-rc2v2.6.12-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!
Diffstat (limited to 'include/net/ip_mp_alg.h')
-rw-r--r-- | include/net/ip_mp_alg.h | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/include/net/ip_mp_alg.h b/include/net/ip_mp_alg.h new file mode 100644 index 000000000000..77225735cbd4 --- /dev/null +++ b/include/net/ip_mp_alg.h @@ -0,0 +1,99 @@ +/* ip_mp_alg.h: IPV4 multipath algorithm support. + * + * Copyright (C) 2004, 2005 Einar Lueck <elueck@de.ibm.com> + * Copyright (C) 2005 David S. Miller <davem@davemloft.net> + */ + +#ifndef _NET_IP_MP_ALG_H +#define _NET_IP_MP_ALG_H + +#include <linux/config.h> +#include <linux/ip_mp_alg.h> +#include <net/flow.h> +#include <net/route.h> + +struct fib_nh; + +struct ip_mp_alg_ops { + void (*mp_alg_select_route)(const struct flowi *flp, + struct rtable *rth, struct rtable **rp); + void (*mp_alg_flush)(void); + void (*mp_alg_set_nhinfo)(__u32 network, __u32 netmask, + unsigned char prefixlen, + const struct fib_nh *nh); + void (*mp_alg_remove)(struct rtable *rth); +}; + +extern int multipath_alg_register(struct ip_mp_alg_ops *, enum ip_mp_alg); +extern void multipath_alg_unregister(struct ip_mp_alg_ops *, enum ip_mp_alg); + +extern struct ip_mp_alg_ops *ip_mp_alg_table[]; + +static inline int multipath_select_route(const struct flowi *flp, + struct rtable *rth, + struct rtable **rp) +{ +#ifdef CONFIG_IP_ROUTE_MULTIPATH_CACHED + struct ip_mp_alg_ops *ops = ip_mp_alg_table[rth->rt_multipath_alg]; + + /* mp_alg_select_route _MUST_ be implemented */ + if (ops && (rth->u.dst.flags & DST_BALANCED)) { + ops->mp_alg_select_route(flp, rth, rp); + return 1; + } +#endif + return 0; +} + +static inline void multipath_flush(void) +{ +#ifdef CONFIG_IP_ROUTE_MULTIPATH_CACHED + int i; + + for (i = IP_MP_ALG_NONE; i <= IP_MP_ALG_MAX; i++) { + struct ip_mp_alg_ops *ops = ip_mp_alg_table[i]; + + if (ops && ops->mp_alg_flush) + ops->mp_alg_flush(); + } +#endif +} + +static inline void multipath_set_nhinfo(struct rtable *rth, + __u32 network, __u32 netmask, + unsigned char prefixlen, + const struct fib_nh *nh) +{ +#ifdef CONFIG_IP_ROUTE_MULTIPATH_CACHED + struct ip_mp_alg_ops *ops = ip_mp_alg_table[rth->rt_multipath_alg]; + + if (ops && ops->mp_alg_set_nhinfo) + ops->mp_alg_set_nhinfo(network, netmask, prefixlen, nh); +#endif +} + +static inline void multipath_remove(struct rtable *rth) +{ +#ifdef CONFIG_IP_ROUTE_MULTIPATH_CACHED + struct ip_mp_alg_ops *ops = ip_mp_alg_table[rth->rt_multipath_alg]; + + if (ops && ops->mp_alg_remove && + (rth->u.dst.flags & DST_BALANCED)) + ops->mp_alg_remove(rth); +#endif +} + +static inline int multipath_comparekeys(const struct flowi *flp1, + const struct flowi *flp2) +{ + return flp1->fl4_dst == flp2->fl4_dst && + flp1->fl4_src == flp2->fl4_src && + flp1->oif == flp2->oif && +#ifdef CONFIG_IP_ROUTE_FWMARK + flp1->fl4_fwmark == flp2->fl4_fwmark && +#endif + !((flp1->fl4_tos ^ flp2->fl4_tos) & + (IPTOS_RT_MASK | RTO_ONLINK)); +} + +#endif /* _NET_IP_MP_ALG_H */ |