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Date: Fri, 27 Jul 2012 21:18:30 -0700 (PDT)
From: David Miller <davem@...emloft.net>
To: alexander.duyck@...il.com
Cc: eric.dumazet@...il.com, netdev@...r.kernel.org
Subject: [PATCH 4/7] ipv4: Store prefixlen in fib_info.
The shrinks fib_result by 4 bytes since we don't have to write
it there any longer.
Signed-off-by: David S. Miller <davem@...emloft.net>
---
include/net/ip_fib.h | 8 +++-----
net/ipv4/fib_frontend.c | 2 +-
net/ipv4/fib_semantics.c | 6 ++++--
net/ipv4/fib_trie.c | 1 -
net/ipv4/route.c | 4 ++--
5 files changed, 10 insertions(+), 11 deletions(-)
diff --git a/include/net/ip_fib.h b/include/net/ip_fib.h
index 3cb9e45..43be7230 100644
--- a/include/net/ip_fib.h
+++ b/include/net/ip_fib.h
@@ -96,11 +96,13 @@ struct fib_info {
struct net *fib_net;
int fib_treeref;
atomic_t fib_clntref;
- unsigned int fib_flags;
+ unsigned char fib_flags;
unsigned char fib_dead;
unsigned char fib_protocol;
unsigned char fib_scope;
unsigned char fib_type;
+ unsigned char fib_prefixlen;
+ unsigned short __pad;
__be32 fib_prefsrc;
u32 fib_priority;
u32 *fib_metrics;
@@ -124,10 +126,6 @@ struct fib_rule;
struct fib_table;
struct fib_result {
- unsigned char prefixlen;
- unsigned char __pad;
- unsigned char __pad2;
- unsigned char __pad3;
u32 tclassid;
struct fib_nh *nh;
struct fib_table *table;
diff --git a/net/ipv4/fib_frontend.c b/net/ipv4/fib_frontend.c
index 495b540..1e1907c 100644
--- a/net/ipv4/fib_frontend.c
+++ b/net/ipv4/fib_frontend.c
@@ -943,7 +943,7 @@ static void nl_fib_lookup(struct fib_result_nl *frn, struct fib_table *tb)
fi = nh->nh_parent;
nhsel = nh - &fi->fib_nh[0];
- frn->prefixlen = res.prefixlen;
+ frn->prefixlen = fi->fib_prefixlen;
frn->nh_sel = nhsel;
frn->type = fi->fib_type;
frn->scope = fi->fib_scope;
diff --git a/net/ipv4/fib_semantics.c b/net/ipv4/fib_semantics.c
index 13b801a..bf4c809 100644
--- a/net/ipv4/fib_semantics.c
+++ b/net/ipv4/fib_semantics.c
@@ -252,8 +252,8 @@ static inline unsigned int fib_info_hashfn(const struct fib_info *fi)
unsigned int mask = (fib_info_hash_size - 1);
unsigned int val = fi->fib_nhs;
- val ^= ((fi->fib_protocol << 16) | (fi->fib_scope << 8) |
- fi->fib_type);
+ val ^= ((fi->fib_protocol << 24) | (fi->fib_scope << 16) |
+ (fi->fib_type << 8) | fi->fib_prefixlen);
val ^= (__force u32)fi->fib_prefsrc;
val ^= fi->fib_priority;
for_nexthops(fi) {
@@ -281,6 +281,7 @@ static struct fib_info *fib_find_info(const struct fib_info *nfi)
if (nfi->fib_protocol == fi->fib_protocol &&
nfi->fib_scope == fi->fib_scope &&
nfi->fib_type == fi->fib_type &&
+ nfi->fib_prefixlen == fi->fib_prefixlen &&
nfi->fib_prefsrc == fi->fib_prefsrc &&
nfi->fib_priority == fi->fib_priority &&
memcmp(nfi->fib_metrics, fi->fib_metrics,
@@ -801,6 +802,7 @@ struct fib_info *fib_create_info(struct fib_config *cfg)
fi->fib_protocol = cfg->fc_protocol;
fi->fib_scope = cfg->fc_scope;
fi->fib_type = cfg->fc_type;
+ fi->fib_prefixlen = cfg->fc_dst_len;
fi->fib_flags = cfg->fc_flags;
fi->fib_priority = cfg->fc_priority;
fi->fib_prefsrc = cfg->fc_prefsrc;
diff --git a/net/ipv4/fib_trie.c b/net/ipv4/fib_trie.c
index f812f06..3d1d450 100644
--- a/net/ipv4/fib_trie.c
+++ b/net/ipv4/fib_trie.c
@@ -1391,7 +1391,6 @@ static int check_leaf(struct fib_table *tb, struct trie *t, struct leaf *l,
#ifdef CONFIG_IP_FIB_TRIE_STATS
t->stats.semantic_match_passed++;
#endif
- res->prefixlen = li->plen;
res->nh = nh;
res->table = tb;
res->fa_head = &li->falh;
diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index 6d4353b..597fbc0 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -1740,7 +1740,7 @@ static struct rtable *__mkroute_output(const struct fib_result *res,
* default one, but do not gateway in this case.
* Yes, it is hack.
*/
- if (nh && res->prefixlen < 4)
+ if (nh && nh->nh_parent->fib_prefixlen < 4)
nh = NULL;
}
@@ -1967,7 +1967,7 @@ struct rtable *__ip_route_output_key(struct net *net, struct flowi4 *fl4)
fib_select_multipath(&res);
else
#endif
- if (!res.prefixlen &&
+ if (!res.nh->nh_parent->fib_prefixlen &&
res.table->tb_num_default > 1 &&
type == RTN_UNICAST && !fl4->flowi4_oif)
fib_select_default(&res);
--
1.7.10.4
--
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