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vxlan: Remove access to nexthop group struct

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vxlan driver should be using helpers to access nexthop struct
internals. Remove open check if whether nexthop is multipath in
favor of the existing nexthop_is_multipath helper. Add a new
helper, nexthop_has_v4, to cover the need to check has_v4 in
a group.

Fixes: 1274e1cc42 ("vxlan: ecmp support for mac fdb entries")
Cc: Roopa Prabhu <roopa@cumulusnetworks.com>
Signed-off-by: David Ahern <dsahern@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David Ahern 2020-06-09 17:27:28 -06:00 committed by David S. Miller
parent ce9ac056d9
commit 50cb8769f2
2 changed files with 14 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/net/vxlan.c
View File

@ -857,7 +857,6 @@ static int vxlan_fdb_nh_update(struct vxlan_dev *vxlan, struct vxlan_fdb *fdb,
u32 nhid, struct netlink_ext_ack *extack)
{
struct nexthop *old_nh = rtnl_dereference(fdb->nh);
struct nh_group *nhg;
struct nexthop *nh;
int err = -EINVAL;
@ -881,8 +880,7 @@ static int vxlan_fdb_nh_update(struct vxlan_dev *vxlan, struct vxlan_fdb *fdb,
goto err_inval;
}
nhg = rtnl_dereference(nh->nh_grp);
if (!nh->is_group || !nhg->mpath) {
if (!nexthop_is_multipath(nh)) {
NL_SET_ERR_MSG(extack, "Nexthop is not a multipath group");
goto err_inval;
}
@ -890,14 +888,14 @@ static int vxlan_fdb_nh_update(struct vxlan_dev *vxlan, struct vxlan_fdb *fdb,
/* check nexthop group family */
switch (vxlan->default_dst.remote_ip.sa.sa_family) {
case AF_INET:
if (!nhg->has_v4) {
if (!nexthop_has_v4(nh)) {
err = -EAFNOSUPPORT;
NL_SET_ERR_MSG(extack, "Nexthop group family not supported");
goto err_inval;
}
break;
case AF_INET6:
if (nhg->has_v4) {
if (nexthop_has_v4(nh)) {
err = -EAFNOSUPPORT;
NL_SET_ERR_MSG(extack, "Nexthop group family not supported");
goto err_inval;

11
include/net/nexthop.h
View File

@ -151,6 +151,17 @@ static inline bool nexthop_is_fdb(const struct nexthop *nh)
}
}
static inline bool nexthop_has_v4(const struct nexthop *nh)
{
if (nh->is_group) {
struct nh_group *nh_grp;
nh_grp = rcu_dereference_rtnl(nh->nh_grp);
return nh_grp->has_v4;
}
return false;
}
static inline bool nexthop_is_multipath(const struct nexthop *nh)
{
if (nh->is_group) {