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authorDavid S. Miller <davem@davemloft.net>2011-03-24 18:06:47 -0700
committerDavid S. Miller <davem@davemloft.net>2011-03-24 18:06:47 -0700
commit37e826c513883099c298317bad1b3b677b2905fb (patch)
treea032cfe69e0cde179d86eba157cf9dc85d67df86 /net/ipv4/fib_semantics.c
parent436c3b66ec9824a633724ae42de1c416af4f2063 (diff)
ipv4: Fix nexthop caching wrt. scoping.
Move the scope value out of the fib alias entries and into fib_info, so that we always use the correct scope when recomputing the nexthop cached source address. Reported-by: Julian Anastasov <ja@ssi.bg> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/fib_semantics.c')
-rw-r--r--net/ipv4/fib_semantics.c15
1 files changed, 8 insertions, 7 deletions
diff --git a/net/ipv4/fib_semantics.c b/net/ipv4/fib_semantics.c
index 2d4bebca671a..641a5a2a9f9c 100644
--- a/net/ipv4/fib_semantics.c
+++ b/net/ipv4/fib_semantics.c
@@ -222,7 +222,7 @@ 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;
+ val ^= (fi->fib_protocol << 8) | fi->fib_scope;
val ^= (__force u32)fi->fib_prefsrc;
val ^= fi->fib_priority;
for_nexthops(fi) {
@@ -248,6 +248,7 @@ static struct fib_info *fib_find_info(const struct fib_info *nfi)
if (fi->fib_nhs != nfi->fib_nhs)
continue;
if (nfi->fib_protocol == fi->fib_protocol &&
+ nfi->fib_scope == fi->fib_scope &&
nfi->fib_prefsrc == fi->fib_prefsrc &&
nfi->fib_priority == fi->fib_priority &&
memcmp(nfi->fib_metrics, fi->fib_metrics,
@@ -328,7 +329,7 @@ void rtmsg_fib(int event, __be32 key, struct fib_alias *fa,
goto errout;
err = fib_dump_info(skb, info->pid, seq, event, tb_id,
- fa->fa_type, fa->fa_scope, key, dst_len,
+ fa->fa_type, key, dst_len,
fa->fa_tos, fa->fa_info, nlm_flags);
if (err < 0) {
/* -EMSGSIZE implies BUG in fib_nlmsg_size() */
@@ -699,7 +700,7 @@ __be32 fib_info_update_nh_saddr(struct net *net, struct fib_nh *nh)
{
nh->nh_saddr = inet_select_addr(nh->nh_dev,
nh->nh_gw,
- nh->nh_cfg_scope);
+ nh->nh_parent->fib_scope);
nh->nh_saddr_genid = atomic_read(&net->ipv4.dev_addr_genid);
return nh->nh_saddr;
@@ -763,6 +764,7 @@ struct fib_info *fib_create_info(struct fib_config *cfg)
fi->fib_net = hold_net(net);
fi->fib_protocol = cfg->fc_protocol;
+ fi->fib_scope = cfg->fc_scope;
fi->fib_flags = cfg->fc_flags;
fi->fib_priority = cfg->fc_priority;
fi->fib_prefsrc = cfg->fc_prefsrc;
@@ -864,7 +866,6 @@ struct fib_info *fib_create_info(struct fib_config *cfg)
}
change_nexthops(fi) {
- nexthop_nh->nh_cfg_scope = cfg->fc_scope;
fib_info_update_nh_saddr(net, nexthop_nh);
} endfor_nexthops(fi)
@@ -914,7 +915,7 @@ failure:
}
int fib_dump_info(struct sk_buff *skb, u32 pid, u32 seq, int event,
- u32 tb_id, u8 type, u8 scope, __be32 dst, int dst_len, u8 tos,
+ u32 tb_id, u8 type, __be32 dst, int dst_len, u8 tos,
struct fib_info *fi, unsigned int flags)
{
struct nlmsghdr *nlh;
@@ -936,7 +937,7 @@ int fib_dump_info(struct sk_buff *skb, u32 pid, u32 seq, int event,
NLA_PUT_U32(skb, RTA_TABLE, tb_id);
rtm->rtm_type = type;
rtm->rtm_flags = fi->fib_flags;
- rtm->rtm_scope = scope;
+ rtm->rtm_scope = fi->fib_scope;
rtm->rtm_protocol = fi->fib_protocol;
if (rtm->rtm_dst_len)
@@ -1092,7 +1093,7 @@ void fib_select_default(struct fib_result *res)
list_for_each_entry_rcu(fa, fa_head, fa_list) {
struct fib_info *next_fi = fa->fa_info;
- if (fa->fa_scope != res->scope ||
+ if (next_fi->fib_scope != res->scope ||
fa->fa_type != RTN_UNICAST)
continue;