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net: Replace nhc_has_gw with nhc_gw_family

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Allow the gateway in a fib_nh_common to be from a different address
family than the outer fib{6}_nh. To that end, replace nhc_has_gw with
nhc_gw_family and update users of nhc_has_gw to check nhc_gw_family.
Now nhc_family is used to know if the nh_common is part of a fib_nh
or fib6_nh (used for container_of to get to route family specific data),
and nhc_gw_family represents the address family for the gateway.

Signed-off-by: David Ahern <dsahern@gmail.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David Ahern 2019-04-05 16:30:26 -07:00 committed by David S. Miller
parent 71df5777aa
commit bdf0046771
10 changed files with 35 additions and 38 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
View File

@ -4915,7 +4915,7 @@ static void mlxsw_sp_rt6_destroy(struct mlxsw_sp_rt6 *mlxsw_sp_rt6)
static bool mlxsw_sp_fib6_rt_can_mp(const struct fib6_info *rt)
{
/* RTF_CACHE routes are ignored */
return !(rt->fib6_flags & RTF_ADDRCONF) && rt->fib6_nh.fib_nh_has_gw;
return !(rt->fib6_flags & RTF_ADDRCONF) && rt->fib6_nh.fib_nh_gw_family;
}
static struct fib6_info *
@ -5055,7 +5055,7 @@ static void mlxsw_sp_nexthop6_fini(struct mlxsw_sp *mlxsw_sp,
static bool mlxsw_sp_rt6_is_gateway(const struct mlxsw_sp *mlxsw_sp,
const struct fib6_info *rt)
{
return rt->fib6_nh.fib_nh_has_gw ||
return rt->fib6_nh.fib_nh_gw_family ||
mlxsw_sp_nexthop6_ipip_type(mlxsw_sp, rt, NULL);
}

2
include/net/ip6_route.h
View File

@ -69,7 +69,7 @@ static inline bool rt6_need_strict(const struct in6_addr *daddr)
static inline bool rt6_qualify_for_ecmp(const struct fib6_info *f6i)
{
return !(f6i->fib6_flags & (RTF_ADDRCONF|RTF_DYNAMIC)) &&
f6i->fib6_nh.fib_nh_has_gw;
f6i->fib6_nh.fib_nh_gw_family;
}
void ip6_route_input(struct sk_buff *skb);

7
include/net/ip_fib.h
View File

@ -83,8 +83,8 @@ struct fib_nh_common {
struct lwtunnel_state *nhc_lwtstate;
unsigned char nhc_scope;
u8 nhc_family;
u8 nhc_has_gw:1,
unused:7;
u8 nhc_gw_family;
union {
__be32 ipv4;
struct in6_addr ipv6;
@ -112,8 +112,7 @@ struct fib_nh {
#define fib_nh_flags nh_common.nhc_flags
#define fib_nh_lws nh_common.nhc_lwtstate
#define fib_nh_scope nh_common.nhc_scope
#define fib_nh_family nh_common.nhc_family
#define fib_nh_has_gw nh_common.nhc_has_gw
#define fib_nh_gw_family nh_common.nhc_gw_family
#define fib_nh_gw4 nh_common.nhc_gw.ipv4
#define fib_nh_gw6 nh_common.nhc_gw.ipv6
#define fib_nh_weight nh_common.nhc_weight

4
include/trace/events/fib.h
View File

@ -69,13 +69,13 @@ TRACE_EVENT(fib_table_lookup,
__assign_str(name, dev ? dev->name : "-");
if (nhc) {
if (nhc->nhc_family == AF_INET) {
if (nhc->nhc_gw_family == AF_INET) {
p32 = (__be32 *) __entry->gw4;
*p32 = nhc->nhc_gw.ipv4;
in6 = (struct in6_addr *)__entry->gw6;
*in6 = in6_zero;
} else if (nhc->nhc_family == AF_INET6) {
} else if (nhc->nhc_gw_family == AF_INET6) {
p32 = (__be32 *) __entry->gw4;
*p32 = 0;

4
net/core/filter.c
View File

@ -4639,7 +4639,7 @@ static int bpf_ipv4_fib_lookup(struct net *net, struct bpf_fib_lookup *params,
return BPF_FIB_LKUP_RET_UNSUPP_LWT;
dev = nhc->nhc_dev;
if (nhc->nhc_has_gw)
if (nhc->nhc_gw_family)
params->ipv4_dst = nhc->nhc_gw.ipv4;
params->rt_metric = res.fi->fib_priority;
@ -4752,7 +4752,7 @@ static int bpf_ipv6_fib_lookup(struct net *net, struct bpf_fib_lookup *params,
if (f6i->fib6_nh.fib_nh_lws)
return BPF_FIB_LKUP_RET_UNSUPP_LWT;
if (f6i->fib6_nh.fib_nh_has_gw)
if (f6i->fib6_nh.fib_nh_gw_family)
*dst = f6i->fib6_nh.fib_nh_gw6;
dev = f6i->fib6_nh.fib_nh_dev;

25
net/ipv4/fib_semantics.c
View File

@ -513,7 +513,7 @@ int fib_nh_init(struct net *net, struct fib_nh *nh,
nh->fib_nh_oif = cfg->fc_oif;
if (cfg->fc_gw) {
nh->fib_nh_gw4 = cfg->fc_gw;
nh->fib_nh_has_gw = 1;
nh->fib_nh_gw_family = AF_INET;
}
nh->fib_nh_flags = cfg->fc_flags;
@ -1238,7 +1238,7 @@ struct fib_info *fib_create_info(struct fib_config *cfg,
"Route with host scope can not have multiple nexthops");
goto err_inval;
}
if (nh->fib_nh_gw4) {
if (nh->fib_nh_gw_family) {
NL_SET_ERR_MSG(extack,
"Route with host scope can not have a gateway");
goto err_inval;
@ -1341,18 +1341,15 @@ int fib_nexthop_info(struct sk_buff *skb, const struct fib_nh_common *nhc,
rcu_read_unlock();
}
if (nhc->nhc_has_gw) {
switch (nhc->nhc_family) {
case AF_INET:
if (nla_put_in_addr(skb, RTA_GATEWAY, nhc->nhc_gw.ipv4))
goto nla_put_failure;
break;
case AF_INET6:
if (nla_put_in6_addr(skb, RTA_GATEWAY,
&nhc->nhc_gw.ipv6) < 0)
goto nla_put_failure;
break;
}
switch (nhc->nhc_gw_family) {
case AF_INET:
if (nla_put_in_addr(skb, RTA_GATEWAY, nhc->nhc_gw.ipv4))
goto nla_put_failure;
break;
case AF_INET6:
if (nla_put_in6_addr(skb, RTA_GATEWAY, &nhc->nhc_gw.ipv6) < 0)
goto nla_put_failure;
break;
}
*flags |= (nhc->nhc_flags & RTNH_F_ONLINK);

5
net/ipv4/route.c
View File

@ -1734,8 +1734,9 @@ static int __mkroute_input(struct sk_buff *skb,
do_cache = res->fi && !itag;
if (out_dev == in_dev && err && IN_DEV_TX_REDIRECTS(out_dev) &&
skb->protocol == htons(ETH_P_IP)) {
__be32 gw = nhc->nhc_family == AF_INET ? nhc->nhc_gw.ipv4 : 0;
__be32 gw;
gw = nhc->nhc_gw_family == AF_INET ? nhc->nhc_gw.ipv4 : 0;
if (IN_DEV_SHARED_MEDIA(out_dev) ||
inet_addr_onlink(out_dev, saddr, gw))
IPCB(skb)->flags |= IPSKB_DOREDIRECT;
@ -2284,7 +2285,7 @@ static struct rtable *__mkroute_output(const struct fib_result *res,
} else {
if (unlikely(fl4->flowi4_flags &
FLOWI_FLAG_KNOWN_NH &&
!(nhc->nhc_has_gw &&
!(nhc->nhc_gw_family &&
nhc->nhc_scope == RT_SCOPE_LINK))) {
do_cache = false;
goto add;

2
net/ipv6/addrconf.c
View File

@ -2421,7 +2421,7 @@ static struct fib6_info *addrconf_get_prefix_route(const struct in6_addr *pfx,
for_each_fib6_node_rt_rcu(fn) {
if (rt->fib6_nh.fib_nh_dev->ifindex != dev->ifindex)
continue;
if (no_gw && rt->fib6_nh.fib_nh_has_gw)
if (no_gw && rt->fib6_nh.fib_nh_gw_family)
continue;
if ((rt->fib6_flags & flags) != flags)
continue;

2
net/ipv6/ip6_fib.c
View File

@ -2304,7 +2304,7 @@ static int ipv6_route_seq_show(struct seq_file *seq, void *v)
#else
seq_puts(seq, "00000000000000000000000000000000 00 ");
#endif
if (rt->fib6_nh.fib_nh_has_gw) {
if (rt->fib6_nh.fib_nh_gw_family) {
flags |= RTF_GATEWAY;
seq_printf(seq, "%pi6", &rt->fib6_nh.fib_nh_gw6);
} else {

18
net/ipv6/route.c
View File

@ -533,7 +533,7 @@ static void rt6_probe(struct fib6_info *rt)
* Router Reachability Probe MUST be rate-limited
* to no more than one per minute.
*/
if (!rt || !rt->fib6_nh.fib_nh_has_gw)
if (!rt || !rt->fib6_nh.fib_nh_gw_family)
return;
nh_gw = &rt->fib6_nh.fib_nh_gw6;
@ -595,7 +595,7 @@ static inline enum rt6_nud_state rt6_check_neigh(struct fib6_info *rt)
struct neighbour *neigh;
if (rt->fib6_flags & RTF_NONEXTHOP ||
!rt->fib6_nh.fib_nh_has_gw)
!rt->fib6_nh.fib_nh_gw_family)
return RT6_NUD_SUCCEED;
rcu_read_lock_bh();
@ -769,7 +769,7 @@ static struct fib6_info *rt6_select(struct net *net, struct fib6_node *fn,
static bool rt6_is_gw_or_nonexthop(const struct fib6_info *rt)
{
return (rt->fib6_flags & RTF_NONEXTHOP) || rt->fib6_nh.fib_nh_has_gw;
return (rt->fib6_flags & RTF_NONEXTHOP) || rt->fib6_nh.fib_nh_gw_family;
}
#ifdef CONFIG_IPV6_ROUTE_INFO
@ -975,7 +975,7 @@ static void ip6_rt_copy_init(struct rt6_info *rt, struct fib6_info *ort)
rt->rt6i_dst = ort->fib6_dst;
rt->rt6i_idev = dev ? in6_dev_get(dev) : NULL;
rt->rt6i_flags = ort->fib6_flags;
if (ort->fib6_nh.fib_nh_has_gw) {
if (ort->fib6_nh.fib_nh_gw_family) {
rt->rt6i_gateway = ort->fib6_nh.fib_nh_gw6;
rt->rt6i_flags |= RTF_GATEWAY;
}
@ -1860,7 +1860,7 @@ struct rt6_info *ip6_pol_route(struct net *net, struct fib6_table *table,
rcu_read_unlock();
return rt;
} else if (unlikely((fl6->flowi6_flags & FLOWI_FLAG_KNOWN_NH) &&
!f6i->fib6_nh.fib_nh_has_gw)) {
!f6i->fib6_nh.fib_nh_gw_family)) {
/* Create a RTF_CACHE clone which will not be
* owned by the fib6 tree. It is for the special case where
* the daddr in the skb during the neighbor look-up is different
@ -2430,7 +2430,7 @@ static struct rt6_info *__ip6_route_redirect(struct net *net,
continue;
if (rt->fib6_flags & RTF_REJECT)
break;
if (!rt->fib6_nh.fib_nh_has_gw)
if (!rt->fib6_nh.fib_nh_gw_family)
continue;
if (fl6->flowi6_oif != rt->fib6_nh.fib_nh_dev->ifindex)
continue;
@ -2964,7 +2964,7 @@ int fib6_nh_init(struct net *net, struct fib6_nh *fib6_nh,
goto out;
fib6_nh->fib_nh_gw6 = cfg->fc_gateway;
fib6_nh->fib_nh_has_gw = 1;
fib6_nh->fib_nh_gw_family = AF_INET6;
}
err = -ENODEV;
@ -3476,7 +3476,7 @@ static struct fib6_info *rt6_get_route_info(struct net *net,
if (rt->fib6_nh.fib_nh_dev->ifindex != ifindex)
continue;
if (!(rt->fib6_flags & RTF_ROUTEINFO) ||
!rt->fib6_nh.fib_nh_has_gw)
!rt->fib6_nh.fib_nh_gw_family)
continue;
if (!ipv6_addr_equal(&rt->fib6_nh.fib_nh_gw6, gwaddr))
continue;
@ -3807,7 +3807,7 @@ static int fib6_clean_tohost(struct fib6_info *rt, void *arg)
struct in6_addr *gateway = (struct in6_addr *)arg;
if (((rt->fib6_flags & RTF_RA_ROUTER) == RTF_RA_ROUTER) &&
rt->fib6_nh.fib_nh_has_gw &&
rt->fib6_nh.fib_nh_gw_family &&
ipv6_addr_equal(gateway, &rt->fib6_nh.fib_nh_gw6)) {
return -1;
}