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Date: Fri, 27 Jul 2012 21:18:27 -0700 (PDT)
From: David Miller <davem@...emloft.net>
To: alexander.duyck@...il.com
Cc: eric.dumazet@...il.com, netdev@...r.kernel.org
Subject: [PATCH 3/7] ipv4: Store route type in fib_info.
This removes another value recorded in the fib_result return struct.
Signed-off-by: David S. Miller <davem@...emloft.net>
---
include/net/ip_fib.h | 3 ++-
net/ipv4/devinet.c | 2 +-
net/ipv4/fib_frontend.c | 10 +++++-----
net/ipv4/fib_lookup.h | 6 ++----
net/ipv4/fib_semantics.c | 17 ++++++++++-------
net/ipv4/fib_trie.c | 20 ++++++++------------
net/ipv4/route.c | 36 ++++++++++++++++++++----------------
7 files changed, 48 insertions(+), 46 deletions(-)
diff --git a/include/net/ip_fib.h b/include/net/ip_fib.h
index 847a46b..3cb9e45 100644
--- a/include/net/ip_fib.h
+++ b/include/net/ip_fib.h
@@ -100,6 +100,7 @@ struct fib_info {
unsigned char fib_dead;
unsigned char fib_protocol;
unsigned char fib_scope;
+ unsigned char fib_type;
__be32 fib_prefsrc;
u32 fib_priority;
u32 *fib_metrics;
@@ -125,8 +126,8 @@ struct fib_table;
struct fib_result {
unsigned char prefixlen;
unsigned char __pad;
- unsigned char type;
unsigned char __pad2;
+ unsigned char __pad3;
u32 tclassid;
struct fib_nh *nh;
struct fib_table *table;
diff --git a/net/ipv4/devinet.c b/net/ipv4/devinet.c
index 1baaa53..1595a67d 100644
--- a/net/ipv4/devinet.c
+++ b/net/ipv4/devinet.c
@@ -163,7 +163,7 @@ struct net_device *__ip_dev_find(struct net *net, __be32 addr, bool devref)
local = fib_get_table(net, RT_TABLE_LOCAL);
if (local &&
!fib_table_lookup(local, &fl4, &res, FIB_LOOKUP_NOREF) &&
- res.type == RTN_LOCAL)
+ res.nh->nh_parent->fib_type == RTN_LOCAL)
result = res.nh->nh_dev;
}
if (result && devref)
diff --git a/net/ipv4/fib_frontend.c b/net/ipv4/fib_frontend.c
index e02390d..495b540 100644
--- a/net/ipv4/fib_frontend.c
+++ b/net/ipv4/fib_frontend.c
@@ -175,7 +175,7 @@ static inline unsigned int __inet_dev_addr_type(struct net *net,
rcu_read_lock();
if (!fib_table_lookup(local_table, &fl4, &res, FIB_LOOKUP_NOREF)) {
if (!dev || dev == res.nh->nh_dev)
- ret = res.type;
+ ret = res.nh->nh_parent->fib_type;
}
rcu_read_unlock();
}
@@ -267,8 +267,8 @@ static int __fib_validate_source(struct sk_buff *skb, __be32 src, __be32 dst,
net = dev_net(dev);
if (fib_lookup(net, &fl4, &res))
goto last_resort;
- if (res.type != RTN_UNICAST) {
- if (res.type != RTN_LOCAL || !accept_local)
+ if (res.nh->nh_parent->fib_type != RTN_UNICAST) {
+ if (res.nh->nh_parent->fib_type != RTN_LOCAL || !accept_local)
goto e_inval;
}
fib_combine_itag(itag, &res);
@@ -295,7 +295,7 @@ static int __fib_validate_source(struct sk_buff *skb, __be32 src, __be32 dst,
ret = 0;
if (fib_lookup(net, &fl4, &res) == 0) {
- if (res.type == RTN_UNICAST)
+ if (res.nh->nh_parent->fib_type == RTN_UNICAST)
ret = res.nh->nh_scope >= RT_SCOPE_HOST;
}
return ret;
@@ -945,7 +945,7 @@ static void nl_fib_lookup(struct fib_result_nl *frn, struct fib_table *tb)
frn->prefixlen = res.prefixlen;
frn->nh_sel = nhsel;
- frn->type = res.type;
+ frn->type = fi->fib_type;
frn->scope = fi->fib_scope;
}
rcu_read_unlock();
diff --git a/net/ipv4/fib_lookup.h b/net/ipv4/fib_lookup.h
index 5f110b6..3dd6b49 100644
--- a/net/ipv4/fib_lookup.h
+++ b/net/ipv4/fib_lookup.h
@@ -9,7 +9,6 @@ struct fib_alias {
struct list_head fa_list;
struct fib_info *fa_info;
u8 fa_tos;
- u8 fa_type;
u8 fa_state;
struct rcu_head rcu;
};
@@ -28,9 +27,8 @@ extern void fib_release_info(struct fib_info *);
extern struct fib_info *fib_create_info(struct fib_config *cfg);
extern int fib_nh_match(struct fib_config *cfg, struct fib_info *fi);
extern int fib_dump_info(struct sk_buff *skb, u32 pid, u32 seq, int event,
- u32 tb_id, u8 type, __be32 dst,
- int dst_len, u8 tos, struct fib_info *fi,
- unsigned int);
+ u32 tb_id, __be32 dst, int dst_len, u8 tos,
+ struct fib_info *fi, unsigned int);
extern void rtmsg_fib(int event, __be32 key, struct fib_alias *fa,
int dst_len, u32 tb_id, struct nl_info *info,
unsigned int nlm_flags);
diff --git a/net/ipv4/fib_semantics.c b/net/ipv4/fib_semantics.c
index 6f73403..13b801a 100644
--- a/net/ipv4/fib_semantics.c
+++ b/net/ipv4/fib_semantics.c
@@ -252,7 +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 << 8) | fi->fib_scope;
+ val ^= ((fi->fib_protocol << 16) | (fi->fib_scope << 8) |
+ fi->fib_type);
val ^= (__force u32)fi->fib_prefsrc;
val ^= fi->fib_priority;
for_nexthops(fi) {
@@ -279,6 +280,7 @@ static struct fib_info *fib_find_info(const struct fib_info *nfi)
continue;
if (nfi->fib_protocol == fi->fib_protocol &&
nfi->fib_scope == fi->fib_scope &&
+ nfi->fib_type == fi->fib_type &&
nfi->fib_prefsrc == fi->fib_prefsrc &&
nfi->fib_priority == fi->fib_priority &&
memcmp(nfi->fib_metrics, fi->fib_metrics,
@@ -359,8 +361,7 @@ 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, key, dst_len,
- fa->fa_tos, fa->fa_info, nlm_flags);
+ key, dst_len, fa->fa_tos, fa->fa_info, nlm_flags);
if (err < 0) {
/* -EMSGSIZE implies BUG in fib_nlmsg_size() */
WARN_ON(err == -EMSGSIZE);
@@ -610,7 +611,8 @@ static int fib_check_nh(struct fib_config *cfg, struct fib_info *fi,
}
}
err = -EINVAL;
- if (res.type != RTN_UNICAST && res.type != RTN_LOCAL)
+ if (res.nh->nh_parent->fib_type != RTN_UNICAST &&
+ res.nh->nh_parent->fib_type != RTN_LOCAL)
goto out;
nh->nh_scope = res.nh->nh_parent->fib_scope;
nh->nh_oif = res.nh->nh_oif;
@@ -798,6 +800,7 @@ 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_type = cfg->fc_type;
fi->fib_flags = cfg->fc_flags;
fi->fib_priority = cfg->fc_priority;
fi->fib_prefsrc = cfg->fc_prefsrc;
@@ -957,7 +960,7 @@ failure:
}
int fib_dump_info(struct sk_buff *skb, u32 pid, u32 seq, int event,
- u32 tb_id, u8 type, __be32 dst, int dst_len, u8 tos,
+ u32 tb_id, __be32 dst, int dst_len, u8 tos,
struct fib_info *fi, unsigned int flags)
{
struct nlmsghdr *nlh;
@@ -978,7 +981,7 @@ int fib_dump_info(struct sk_buff *skb, u32 pid, u32 seq, int event,
rtm->rtm_table = RT_TABLE_COMPAT;
if (nla_put_u32(skb, RTA_TABLE, tb_id))
goto nla_put_failure;
- rtm->rtm_type = type;
+ rtm->rtm_type = fi->fib_type;
rtm->rtm_flags = fi->fib_flags;
rtm->rtm_scope = fi->fib_scope;
rtm->rtm_protocol = fi->fib_protocol;
@@ -1142,7 +1145,7 @@ void fib_select_default(struct fib_result *res)
if ((next_nh->nh_parent->fib_scope !=
res->nh->nh_parent->fib_scope) ||
- fa->fa_type != RTN_UNICAST)
+ next_nh->nh_parent->fib_type != RTN_UNICAST)
continue;
if (next_nh->nh_parent->fib_priority >
diff --git a/net/ipv4/fib_trie.c b/net/ipv4/fib_trie.c
index 83cf215..f812f06 100644
--- a/net/ipv4/fib_trie.c
+++ b/net/ipv4/fib_trie.c
@@ -1253,8 +1253,7 @@ int fib_table_insert(struct fib_table *tb, struct fib_config *cfg)
break;
if (fa->fa_info->fib_priority != fi->fib_priority)
break;
- if (fa->fa_type == cfg->fc_type &&
- fa->fa_info == fi) {
+ if (fa->fa_info == fi) {
fa_match = fa;
break;
}
@@ -1278,7 +1277,6 @@ int fib_table_insert(struct fib_table *tb, struct fib_config *cfg)
fi_drop = fa->fa_info;
new_fa->fa_tos = fa->fa_tos;
new_fa->fa_info = fi;
- new_fa->fa_type = cfg->fc_type;
state = fa->fa_state;
new_fa->fa_state = state & ~FA_S_ACCESSED;
@@ -1314,7 +1312,6 @@ int fib_table_insert(struct fib_table *tb, struct fib_config *cfg)
new_fa->fa_info = fi;
new_fa->fa_tos = tos;
- new_fa->fa_type = cfg->fc_type;
new_fa->fa_state = 0;
/*
* Insert new entry to the list.
@@ -1374,7 +1371,7 @@ static int check_leaf(struct fib_table *tb, struct trie *t, struct leaf *l,
if (fa->fa_info->fib_scope < flp->flowi4_scope)
continue;
fib_alias_accessed(fa);
- err = fib_props[fa->fa_type].error;
+ err = fib_props[fi->fib_type].error;
if (err) {
#ifdef CONFIG_IP_FIB_TRIE_STATS
t->stats.semantic_match_passed++;
@@ -1395,7 +1392,6 @@ static int check_leaf(struct fib_table *tb, struct trie *t, struct leaf *l,
t->stats.semantic_match_passed++;
#endif
res->prefixlen = li->plen;
- res->type = fa->fa_type;
res->nh = nh;
res->table = tb;
res->fa_head = &li->falh;
@@ -1670,7 +1666,8 @@ int fib_table_delete(struct fib_table *tb, struct fib_config *cfg)
if (fa->fa_tos != tos)
break;
- if ((!cfg->fc_type || fa->fa_type == cfg->fc_type) &&
+ if ((!cfg->fc_type ||
+ fa->fa_info->fib_type == cfg->fc_type) &&
(cfg->fc_scope == RT_SCOPE_NOWHERE ||
fa->fa_info->fib_scope == cfg->fc_scope) &&
(!cfg->fc_prefsrc ||
@@ -1873,7 +1870,6 @@ static int fn_trie_dump_fa(t_key key, int plen, struct list_head *fah,
cb->nlh->nlmsg_seq,
RTM_NEWROUTE,
tb->tb_id,
- fa->fa_type,
xkey,
plen,
fa->fa_tos,
@@ -2394,7 +2390,7 @@ static int fib_trie_seq_show(struct seq_file *seq, void *v)
rtn_scope(buf1, sizeof(buf1),
fa->fa_info->fib_scope),
rtn_type(buf2, sizeof(buf2),
- fa->fa_type));
+ fa->fa_info->fib_type));
if (fa->fa_tos)
seq_printf(seq, " tos=%d", fa->fa_tos);
seq_putc(seq, '\n');
@@ -2546,11 +2542,11 @@ static int fib_route_seq_show(struct seq_file *seq, void *v)
list_for_each_entry_rcu(fa, &li->falh, fa_list) {
const struct fib_info *fi = fa->fa_info;
- unsigned int flags = fib_flag_trans(fa->fa_type, mask, fi);
+ unsigned int flags = fib_flag_trans(fi->fib_type, mask, fi);
int len;
- if (fa->fa_type == RTN_BROADCAST
- || fa->fa_type == RTN_MULTICAST)
+ if (fi->fib_type == RTN_BROADCAST ||
+ fi->fib_type == RTN_MULTICAST)
continue;
if (fi)
diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index 0b3277c..6d4353b 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -1436,7 +1436,7 @@ static int __mkroute_input(struct sk_buff *skb,
rth->rt_genid = rt_genid(dev_net(rth->dst.dev));
rth->rt_flags = flags;
- rth->rt_type = res->type;
+ rth->rt_type = res->nh->nh_parent->fib_type;
rth->rt_is_input = 1;
rth->rt_iif = 0;
rth->rt_pmtu = 0;
@@ -1445,7 +1445,7 @@ static int __mkroute_input(struct sk_buff *skb,
rth->dst.input = ip_forward;
rth->dst.output = ip_output;
- rt_set_nexthop(rth, daddr, res, NULL, nh, res->type, itag);
+ rt_set_nexthop(rth, daddr, res, NULL, nh, rth->rt_type, itag);
skb_dst_set(skb, &rth->dst);
out:
err = 0;
@@ -1491,6 +1491,7 @@ static int ip_route_input_slow(struct sk_buff *skb, __be32 daddr, __be32 saddr,
int err = -EINVAL;
struct net *net = dev_net(dev);
bool do_cache;
+ u8 type;
/* IP on this device is disabled. */
@@ -1541,10 +1542,11 @@ static int ip_route_input_slow(struct sk_buff *skb, __be32 daddr, __be32 saddr,
RT_CACHE_STAT_INC(in_slow_tot);
- if (res.type == RTN_BROADCAST)
+ type = res.nh->nh_parent->fib_type;
+ if (type == RTN_BROADCAST)
goto brd_input;
- if (res.type == RTN_LOCAL) {
+ if (type == RTN_LOCAL) {
err = fib_validate_source(skb, saddr, daddr, tos,
net->loopback_dev->ifindex,
dev, in_dev, &itag);
@@ -1555,7 +1557,7 @@ static int ip_route_input_slow(struct sk_buff *skb, __be32 daddr, __be32 saddr,
if (!IN_DEV_FORWARD(in_dev))
goto no_route;
- if (res.type != RTN_UNICAST)
+ if (type != RTN_UNICAST)
goto martian_destination;
err = ip_mkroute_input(skb, &res, &fl4, in_dev, daddr, saddr, tos);
@@ -1572,7 +1574,7 @@ brd_input:
goto martian_source_keep_err;
}
flags |= RTCF_BROADCAST;
- res.type = RTN_BROADCAST;
+ type = RTN_BROADCAST;
RT_CACHE_STAT_INC(in_brd);
local_input:
@@ -1602,12 +1604,12 @@ local_input:
rth->rt_genid = rt_genid(net);
rth->rt_flags = flags|RTCF_LOCAL;
- rth->rt_type = res.type;
+ rth->rt_type = type;
rth->rt_is_input = 1;
rth->rt_iif = 0;
rth->rt_pmtu = 0;
rth->rt_gateway = 0;
- if (res.type == RTN_UNREACHABLE) {
+ if (type == RTN_UNREACHABLE) {
rth->dst.input= ip_error;
rth->dst.error= -err;
rth->rt_flags &= ~RTCF_LOCAL;
@@ -1620,7 +1622,7 @@ local_input:
no_route:
RT_CACHE_STAT_INC(in_no_route);
- res.type = RTN_UNREACHABLE;
+ type = RTN_UNREACHABLE;
if (err == -ESRCH)
err = -ENETUNREACH;
goto local_input;
@@ -1700,13 +1702,12 @@ EXPORT_SYMBOL(ip_route_input_noref);
/* called with rcu_read_lock() */
static struct rtable *__mkroute_output(const struct fib_result *res,
const struct flowi4 *fl4, int orig_oif,
- struct net_device *dev_out,
+ struct net_device *dev_out, u8 type,
unsigned int flags)
{
struct fib_nh_exception *fnhe;
struct fib_nh *nh = res->nh;
struct in_device *in_dev;
- u16 type = res->type;
struct rtable *rth;
in_dev = __in_dev_get_rcu(dev_out);
@@ -1809,6 +1810,7 @@ struct rtable *__ip_route_output_key(struct net *net, struct flowi4 *fl4)
struct fib_result res;
struct rtable *rth;
int orig_oif;
+ u8 type;
res.tclassid = 0;
res.nh = NULL;
@@ -1822,6 +1824,7 @@ struct rtable *__ip_route_output_key(struct net *net, struct flowi4 *fl4)
RT_SCOPE_LINK : RT_SCOPE_UNIVERSE);
rcu_read_lock();
+ type = 0;
if (fl4->saddr) {
rth = ERR_PTR(-EINVAL);
if (ipv4_is_multicast(fl4->saddr) ||
@@ -1906,7 +1909,7 @@ struct rtable *__ip_route_output_key(struct net *net, struct flowi4 *fl4)
fl4->daddr = fl4->saddr = htonl(INADDR_LOOPBACK);
dev_out = net->loopback_dev;
fl4->flowi4_oif = net->loopback_dev->ifindex;
- res.type = RTN_LOCAL;
+ type = RTN_LOCAL;
flags |= RTCF_LOCAL;
goto make_route;
}
@@ -1936,14 +1939,15 @@ struct rtable *__ip_route_output_key(struct net *net, struct flowi4 *fl4)
if (fl4->saddr == 0)
fl4->saddr = inet_select_addr(dev_out, 0,
RT_SCOPE_LINK);
- res.type = RTN_UNICAST;
+ type = RTN_UNICAST;
goto make_route;
}
rth = ERR_PTR(-ENETUNREACH);
goto out;
}
+ type = res.nh->nh_parent->fib_type;
- if (res.type == RTN_LOCAL) {
+ if (type == RTN_LOCAL) {
if (!fl4->saddr) {
struct fib_info *fi = res.nh->nh_parent;
if (fi->fib_prefsrc)
@@ -1965,7 +1969,7 @@ struct rtable *__ip_route_output_key(struct net *net, struct flowi4 *fl4)
#endif
if (!res.prefixlen &&
res.table->tb_num_default > 1 &&
- res.type == RTN_UNICAST && !fl4->flowi4_oif)
+ type == RTN_UNICAST && !fl4->flowi4_oif)
fib_select_default(&res);
if (!fl4->saddr)
@@ -1976,7 +1980,7 @@ struct rtable *__ip_route_output_key(struct net *net, struct flowi4 *fl4)
make_route:
- rth = __mkroute_output(&res, fl4, orig_oif, dev_out, flags);
+ rth = __mkroute_output(&res, fl4, orig_oif, dev_out, type, flags);
out:
rcu_read_unlock();
--
1.7.10.4
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