[IPV4]: The scheduled removal of multipath cached routing support.

With help from Chris Wedgwood.

Signed-off-by: David S. Miller <davem@davemloft.net>

7 files changed, 1 insertions, 138 deletions

diff --git a/include/linux/Kbuild b/include/linux/Kbuild
index afae306b177c..d94451682761 100644
--- a/include/linux/Kbuild
+++ b/include/linux/Kbuild
@@ -91,7 +91,6 @@ header-y += in6.h
 header-y += in_route.h
 header-y += ioctl.h
 header-y += ipmi_msgdefs.h
-header-y += ip_mp_alg.h
 header-y += ipsec.h
 header-y += ipx.h
 header-y += irda.h
diff --git a/include/linux/ip_mp_alg.h b/include/linux/ip_mp_alg.h
deleted file mode 100644
index e234e2008f5d..000000000000
--- a/include/linux/ip_mp_alg.h
+++ /dev/null
@@ -1,22 +0,0 @@
-/* ip_mp_alg.h: IPV4 multipath algorithm support, user-visible values.
- *
- * Copyright (C) 2004, 2005 Einar Lueck <elueck@de.ibm.com>
- * Copyright (C) 2005 David S. Miller <davem@davemloft.net>
- */
-
-#ifndef _LINUX_IP_MP_ALG_H
-#define _LINUX_IP_MP_ALG_H
-
-enum ip_mp_alg {
-        IP_MP_ALG_NONE,
-        IP_MP_ALG_RR,
-        IP_MP_ALG_DRR,
-        IP_MP_ALG_RANDOM,
-        IP_MP_ALG_WRANDOM,
-        __IP_MP_ALG_MAX
-};
-
-#define IP_MP_ALG_MAX (__IP_MP_ALG_MAX - 1)
-
-#endif /* _LINUX_IP_MP_ALG_H */
-
diff --git a/include/linux/rtnetlink.h b/include/linux/rtnetlink.h
index 1fae30af91f3..612785848532 100644
--- a/include/linux/rtnetlink.h
+++ b/include/linux/rtnetlink.h
@@ -261,7 +261,7 @@ enum rtattr_type_t
         RTA_FLOW,
         RTA_CACHEINFO,
         RTA_SESSION,
-        RTA_MP_ALGO,
+        RTA_MP_ALGO, /* no longer used */
         RTA_TABLE,
         __RTA_MAX
 };
diff --git a/include/net/dst.h b/include/net/dst.h
index 82270f9332db..e9ff4a4caef9 100644
--- a/include/net/dst.h
+++ b/include/net/dst.h
@@ -47,7 +47,6 @@ struct dst_entry
 #define DST_NOXFRM              2
 #define DST_NOPOLICY            4
 #define DST_NOHASH              8
-#define DST_BALANCED            0x10
         unsigned long           expires;
 
         unsigned short          header_len;     /* more space at head required */
diff --git a/include/net/ip_fib.h b/include/net/ip_fib.h
index 69252cbe05b0..8cadc77c7df4 100644
--- a/include/net/ip_fib.h
+++ b/include/net/ip_fib.h
@@ -39,7 +39,6 @@ struct fib_config {
         int                     fc_mx_len;
         int                     fc_mp_len;
         u32                     fc_flow;
-        u32                     fc_mp_alg;
         u32                     fc_nlflags;
         struct nl_info          fc_nlinfo;
  };
@@ -86,9 +85,6 @@ struct fib_info {
 #ifdef CONFIG_IP_ROUTE_MULTIPATH
         int                     fib_power;
 #endif
-#ifdef CONFIG_IP_ROUTE_MULTIPATH_CACHED
-        u32                     fib_mp_alg;
-#endif
         struct fib_nh           fib_nh[0];
 #define fib_dev         fib_nh[0].nh_dev
 };
@@ -103,10 +99,6 @@ struct fib_result {
         unsigned char   nh_sel;
         unsigned char   type;
         unsigned char   scope;
-#ifdef CONFIG_IP_ROUTE_MULTIPATH_CACHED
-        __be32          network;
-        __be32          netmask;
-#endif
         struct fib_info *fi;
 #ifdef CONFIG_IP_MULTIPLE_TABLES
         struct fib_rule *r;
@@ -145,14 +137,6 @@ struct fib_result_nl {
 #define FIB_RES_DEV(res)                (FIB_RES_NH(res).nh_dev)
 #define FIB_RES_OIF(res)                (FIB_RES_NH(res).nh_oif)
 
-#ifdef CONFIG_IP_ROUTE_MULTIPATH_CACHED
-#define FIB_RES_NETWORK(res)            ((res).network)
-#define FIB_RES_NETMASK(res)            ((res).netmask)
-#else /* CONFIG_IP_ROUTE_MULTIPATH_CACHED */
-#define FIB_RES_NETWORK(res)            (0)
-#define FIB_RES_NETMASK(res)            (0)
-#endif /* CONFIG_IP_ROUTE_MULTIPATH_WRANDOM */
-
 struct fib_table {
         struct hlist_node tb_hlist;
         u32             tb_id;
diff --git a/include/net/ip_mp_alg.h b/include/net/ip_mp_alg.h
deleted file mode 100644
index 25b56571e54b..000000000000
--- a/include/net/ip_mp_alg.h
+++ /dev/null
@@ -1,96 +0,0 @@
-/* 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/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)(__be32 network, __be32 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,
-                                        __be32 network, __be32 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 &&
-                flp1->mark == flp2->mark &&
-                !((flp1->fl4_tos ^ flp2->fl4_tos) &
-                  (IPTOS_RT_MASK | RTO_ONLINK));
-}
-
-#endif /* _NET_IP_MP_ALG_H */
diff --git a/include/net/route.h b/include/net/route.h
index 749e4dfe5ff3..188b8936bb27 100644
--- a/include/net/route.h
+++ b/include/net/route.h
@@ -62,7 +62,6 @@ struct rtable
         
         unsigned                rt_flags;
         __u16                   rt_type;
-        __u16                   rt_multipath_alg;
 
         __be32                  rt_dst; /* Path destination     */
         __be32                  rt_src; /* Path source          */