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Diffstat (limited to 'net/ipv4/nexthop.c')
-rw-r--r--net/ipv4/nexthop.c82
1 files changed, 49 insertions, 33 deletions
diff --git a/net/ipv4/nexthop.c b/net/ipv4/nexthop.c
index 400a9f89ebdb..cc8049b100b2 100644
--- a/net/ipv4/nexthop.c
+++ b/net/ipv4/nexthop.c
@@ -247,12 +247,11 @@ static int nh_fill_node(struct sk_buff *skb, struct nexthop *nh,
if (nla_put_u32(skb, NHA_ID, nh->id))
goto nla_put_failure;
- if (nh->is_fdb_nh && nla_put_flag(skb, NHA_FDB))
- goto nla_put_failure;
-
if (nh->is_group) {
struct nh_group *nhg = rtnl_dereference(nh->nh_grp);
+ if (nhg->fdb_nh && nla_put_flag(skb, NHA_FDB))
+ goto nla_put_failure;
if (nla_put_nh_group(skb, nhg))
goto nla_put_failure;
goto out;
@@ -264,7 +263,10 @@ static int nh_fill_node(struct sk_buff *skb, struct nexthop *nh,
if (nla_put_flag(skb, NHA_BLACKHOLE))
goto nla_put_failure;
goto out;
- } else if (!nh->is_fdb_nh) {
+ } else if (nhi->fdb_nh) {
+ if (nla_put_flag(skb, NHA_FDB))
+ goto nla_put_failure;
+ } else {
const struct net_device *dev;
dev = nhi->fib_nhc.nhc_dev;
@@ -385,7 +387,7 @@ errout:
}
static bool valid_group_nh(struct nexthop *nh, unsigned int npaths,
- struct netlink_ext_ack *extack)
+ bool *is_fdb, struct netlink_ext_ack *extack)
{
if (nh->is_group) {
struct nh_group *nhg = rtnl_dereference(nh->nh_grp);
@@ -398,6 +400,7 @@ static bool valid_group_nh(struct nexthop *nh, unsigned int npaths,
"Multipath group can not be a nexthop within a group");
return false;
}
+ *is_fdb = nhg->fdb_nh;
} else {
struct nh_info *nhi = rtnl_dereference(nh->nh_info);
@@ -406,6 +409,7 @@ static bool valid_group_nh(struct nexthop *nh, unsigned int npaths,
"Blackhole nexthop can not be used in a group with more than 1 path");
return false;
}
+ *is_fdb = nhi->fdb_nh;
}
return true;
@@ -416,12 +420,13 @@ static int nh_check_attr_fdb_group(struct nexthop *nh, u8 *nh_family,
{
struct nh_info *nhi;
- if (!nh->is_fdb_nh) {
+ nhi = rtnl_dereference(nh->nh_info);
+
+ if (!nhi->fdb_nh) {
NL_SET_ERR_MSG(extack, "FDB nexthop group can only have fdb nexthops");
return -EINVAL;
}
- nhi = rtnl_dereference(nh->nh_info);
if (*nh_family == AF_UNSPEC) {
*nh_family = nhi->family;
} else if (*nh_family != nhi->family) {
@@ -473,19 +478,20 @@ static int nh_check_attr_group(struct net *net, struct nlattr *tb[],
nhg = nla_data(tb[NHA_GROUP]);
for (i = 0; i < len; ++i) {
struct nexthop *nh;
+ bool is_fdb_nh;
nh = nexthop_find_by_id(net, nhg[i].id);
if (!nh) {
NL_SET_ERR_MSG(extack, "Invalid nexthop id");
return -EINVAL;
}
- if (!valid_group_nh(nh, len, extack))
+ if (!valid_group_nh(nh, len, &is_fdb_nh, extack))
return -EINVAL;
if (nhg_fdb && nh_check_attr_fdb_group(nh, &nh_family, extack))
return -EINVAL;
- if (!nhg_fdb && nh->is_fdb_nh) {
+ if (!nhg_fdb && is_fdb_nh) {
NL_SET_ERR_MSG(extack, "Non FDB nexthop group cannot have fdb nexthops");
return -EINVAL;
}
@@ -553,13 +559,13 @@ struct nexthop *nexthop_select_path(struct nexthop *nh, int hash)
if (hash > atomic_read(&nhge->upper_bound))
continue;
- if (nhge->nh->is_fdb_nh)
+ nhi = rcu_dereference(nhge->nh->nh_info);
+ if (nhi->fdb_nh)
return nhge->nh;
/* nexthops always check if it is good and does
* not rely on a sysctl for this behavior
*/
- nhi = rcu_dereference(nhge->nh->nh_info);
switch (nhi->family) {
case AF_INET:
if (ipv4_good_nh(&nhi->fib_nh))
@@ -624,11 +630,7 @@ int fib6_check_nexthop(struct nexthop *nh, struct fib6_config *cfg,
struct netlink_ext_ack *extack)
{
struct nh_info *nhi;
-
- if (nh->is_fdb_nh) {
- NL_SET_ERR_MSG(extack, "Route cannot point to a fdb nexthop");
- return -EINVAL;
- }
+ bool is_fdb_nh;
/* fib6_src is unique to a fib6_info and limits the ability to cache
* routes in fib6_nh within a nexthop that is potentially shared
@@ -645,10 +647,17 @@ int fib6_check_nexthop(struct nexthop *nh, struct fib6_config *cfg,
nhg = rtnl_dereference(nh->nh_grp);
if (nhg->has_v4)
goto no_v4_nh;
+ is_fdb_nh = nhg->fdb_nh;
} else {
nhi = rtnl_dereference(nh->nh_info);
if (nhi->family == AF_INET)
goto no_v4_nh;
+ is_fdb_nh = nhi->fdb_nh;
+ }
+
+ if (is_fdb_nh) {
+ NL_SET_ERR_MSG(extack, "Route cannot point to a fdb nexthop");
+ return -EINVAL;
}
return 0;
@@ -677,12 +686,9 @@ static int fib6_check_nh_list(struct nexthop *old, struct nexthop *new,
return fib6_check_nexthop(new, NULL, extack);
}
-static int nexthop_check_scope(struct nexthop *nh, u8 scope,
+static int nexthop_check_scope(struct nh_info *nhi, u8 scope,
struct netlink_ext_ack *extack)
{
- struct nh_info *nhi;
-
- nhi = rtnl_dereference(nh->nh_info);
if (scope == RT_SCOPE_HOST && nhi->fib_nhc.nhc_gw_family) {
NL_SET_ERR_MSG(extack,
"Route with host scope can not have a gateway");
@@ -704,29 +710,38 @@ static int nexthop_check_scope(struct nexthop *nh, u8 scope,
int fib_check_nexthop(struct nexthop *nh, u8 scope,
struct netlink_ext_ack *extack)
{
+ struct nh_info *nhi;
int err = 0;
- if (nh->is_fdb_nh) {
- NL_SET_ERR_MSG(extack, "Route cannot point to a fdb nexthop");
- err = -EINVAL;
- goto out;
- }
-
if (nh->is_group) {
struct nh_group *nhg;
+ nhg = rtnl_dereference(nh->nh_grp);
+ if (nhg->fdb_nh) {
+ NL_SET_ERR_MSG(extack, "Route cannot point to a fdb nexthop");
+ err = -EINVAL;
+ goto out;
+ }
+
if (scope == RT_SCOPE_HOST) {
NL_SET_ERR_MSG(extack, "Route with host scope can not have multiple nexthops");
err = -EINVAL;
goto out;
}
- nhg = rtnl_dereference(nh->nh_grp);
/* all nexthops in a group have the same scope */
- err = nexthop_check_scope(nhg->nh_entries[0].nh, scope, extack);
+ nhi = rtnl_dereference(nhg->nh_entries[0].nh->nh_info);
+ err = nexthop_check_scope(nhi, scope, extack);
} else {
- err = nexthop_check_scope(nh, scope, extack);
+ nhi = rtnl_dereference(nh->nh_info);
+ if (nhi->fdb_nh) {
+ NL_SET_ERR_MSG(extack, "Route cannot point to a fdb nexthop");
+ err = -EINVAL;
+ goto out;
+ }
+ err = nexthop_check_scope(nhi, scope, extack);
}
+
out:
return err;
}
@@ -787,6 +802,7 @@ static void remove_nh_grp_entry(struct net *net, struct nh_grp_entry *nhge,
newg->has_v4 = nhg->has_v4;
newg->mpath = nhg->mpath;
+ newg->fdb_nh = nhg->fdb_nh;
newg->num_nh = nhg->num_nh;
/* copy old entries to new except the one getting removed */
@@ -1216,7 +1232,7 @@ static struct nexthop *nexthop_create_group(struct net *net,
}
if (cfg->nh_fdb)
- nh->is_fdb_nh = 1;
+ nhg->fdb_nh = 1;
rcu_assign_pointer(nh->nh_grp, nhg);
@@ -1255,7 +1271,7 @@ static int nh_create_ipv4(struct net *net, struct nexthop *nh,
goto out;
}
- if (nh->is_fdb_nh)
+ if (nhi->fdb_nh)
goto out;
/* sets nh_dev if successful */
@@ -1326,7 +1342,7 @@ static struct nexthop *nexthop_create(struct net *net, struct nh_config *cfg,
nhi->fib_nhc.nhc_scope = RT_SCOPE_LINK;
if (cfg->nh_fdb)
- nh->is_fdb_nh = 1;
+ nhi->fdb_nh = 1;
if (cfg->nh_blackhole) {
nhi->reject_nh = 1;
@@ -1349,7 +1365,7 @@ static struct nexthop *nexthop_create(struct net *net, struct nh_config *cfg,
}
/* add the entry to the device based hash */
- if (!nh->is_fdb_nh)
+ if (!nhi->fdb_nh)
nexthop_devhash_add(net, nhi);
rcu_assign_pointer(nh->nh_info, nhi);
generated by cgit v1.2.3 (git 2.39.1) at 2024-04-24 18:31:16 +0000