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Merge branch 'mlxsw-GRE-offloading-fixes'

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Jiri Pirko says:

====================
mlxsw: GRE offloading fixes

Petr says:

This patchset fixes a couple bugs in offloading GRE tunnels in mlxsw
driver.

Patch #1 fixes a problem that local routes pointing at a GRE tunnel
device are offloaded even if that netdevice is down.

Patch #2 detects that as a result of moving a GRE netdevice to a
different VRF, two tunnels now have a conflict of local addresses,
something that the mlxsw driver can't offload.

Patch #3 fixes a FIB abort caused by forming a route pointing at a
GRE tunnel that is eligible for offloading but already onloaded.

Patch #4 fixes a problem that next hops migrated to a new RIF kept the
old RIF reference, which went dangling shortly afterwards.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2017-11-28 09:55:48 -05:00
commit e2549970f4
1 changed files with 69 additions and 40 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

109
drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
View File

@ -1370,8 +1370,9 @@ static void mlxsw_sp_netdevice_ipip_ol_down_event(struct mlxsw_sp *mlxsw_sp,
mlxsw_sp_ipip_entry_ol_down_event(mlxsw_sp, ipip_entry);
}
static void mlxsw_sp_nexthop_rif_update(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_rif *rif);
static void mlxsw_sp_nexthop_rif_migrate(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_rif *old_rif,
struct mlxsw_sp_rif *new_rif);
static int
mlxsw_sp_ipip_entry_ol_lb_update(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_ipip_entry *ipip_entry,
@ -1389,17 +1390,18 @@ mlxsw_sp_ipip_entry_ol_lb_update(struct mlxsw_sp *mlxsw_sp,
return PTR_ERR(new_lb_rif);
ipip_entry->ol_lb = new_lb_rif;
if (keep_encap) {
list_splice_init(&old_lb_rif->common.nexthop_list,
&new_lb_rif->common.nexthop_list);
mlxsw_sp_nexthop_rif_update(mlxsw_sp, &new_lb_rif->common);
}
if (keep_encap)
mlxsw_sp_nexthop_rif_migrate(mlxsw_sp, &old_lb_rif->common,
&new_lb_rif->common);
mlxsw_sp_rif_destroy(&old_lb_rif->common);
return 0;
}
static void mlxsw_sp_nexthop_rif_update(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_rif *rif);
/**
* Update the offload related to an IPIP entry. This always updates decap, and
* in addition to that it also:
@ -1449,9 +1451,27 @@ static int mlxsw_sp_netdevice_ipip_ol_vrf_event(struct mlxsw_sp *mlxsw_sp,
{
struct mlxsw_sp_ipip_entry *ipip_entry =
mlxsw_sp_ipip_entry_find_by_ol_dev(mlxsw_sp, ol_dev);
enum mlxsw_sp_l3proto ul_proto;
union mlxsw_sp_l3addr saddr;
u32 ul_tb_id;
if (!ipip_entry)
return 0;
/* For flat configuration cases, moving overlay to a different VRF might
* cause local address conflict, and the conflicting tunnels need to be
* demoted.
*/
ul_tb_id = mlxsw_sp_ipip_dev_ul_tb_id(ol_dev);
ul_proto = mlxsw_sp->router->ipip_ops_arr[ipip_entry->ipipt]->ul_proto;
saddr = mlxsw_sp_ipip_netdev_saddr(ul_proto, ol_dev);
if (mlxsw_sp_ipip_demote_tunnel_by_saddr(mlxsw_sp, ul_proto,
saddr, ul_tb_id,
ipip_entry)) {
mlxsw_sp_ipip_entry_demote_tunnel(mlxsw_sp, ipip_entry);
return 0;
}
return __mlxsw_sp_ipip_entry_update_tunnel(mlxsw_sp, ipip_entry,
true, false, false, extack);
}
@ -3343,22 +3363,19 @@ static bool mlxsw_sp_ipip_netdev_ul_up(struct net_device *ol_dev)
return ul_dev ? (ul_dev->flags & IFF_UP) : true;
}
static int mlxsw_sp_nexthop_ipip_init(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop *nh,
struct net_device *ol_dev)
static void mlxsw_sp_nexthop_ipip_init(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop *nh,
struct mlxsw_sp_ipip_entry *ipip_entry)
{
bool removing;
if (!nh->nh_grp->gateway || nh->ipip_entry)
return 0;
return;
nh->ipip_entry = mlxsw_sp_ipip_entry_find_by_ol_dev(mlxsw_sp, ol_dev);
if (!nh->ipip_entry)
return -ENOENT;
removing = !mlxsw_sp_ipip_netdev_ul_up(ol_dev);
nh->ipip_entry = ipip_entry;
removing = !mlxsw_sp_ipip_netdev_ul_up(ipip_entry->ol_dev);
__mlxsw_sp_nexthop_neigh_update(nh, removing);
return 0;
mlxsw_sp_nexthop_rif_init(nh, &ipip_entry->ol_lb->common);
}
static void mlxsw_sp_nexthop_ipip_fini(struct mlxsw_sp *mlxsw_sp,
@ -3403,21 +3420,21 @@ static int mlxsw_sp_nexthop4_type_init(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop *nh,
struct fib_nh *fib_nh)
{
struct mlxsw_sp_router *router = mlxsw_sp->router;
const struct mlxsw_sp_ipip_ops *ipip_ops;
struct net_device *dev = fib_nh->nh_dev;
enum mlxsw_sp_ipip_type ipipt;
struct mlxsw_sp_ipip_entry *ipip_entry;
struct mlxsw_sp_rif *rif;
int err;
if (mlxsw_sp_nexthop4_ipip_type(mlxsw_sp, fib_nh, &ipipt) &&
router->ipip_ops_arr[ipipt]->can_offload(mlxsw_sp, dev,
MLXSW_SP_L3_PROTO_IPV4)) {
nh->type = MLXSW_SP_NEXTHOP_TYPE_IPIP;
err = mlxsw_sp_nexthop_ipip_init(mlxsw_sp, nh, dev);
if (err)
return err;
mlxsw_sp_nexthop_rif_init(nh, &nh->ipip_entry->ol_lb->common);
return 0;
ipip_entry = mlxsw_sp_ipip_entry_find_by_ol_dev(mlxsw_sp, dev);
if (ipip_entry) {
ipip_ops = mlxsw_sp->router->ipip_ops_arr[ipip_entry->ipipt];
if (ipip_ops->can_offload(mlxsw_sp, dev,
MLXSW_SP_L3_PROTO_IPV4)) {
nh->type = MLXSW_SP_NEXTHOP_TYPE_IPIP;
mlxsw_sp_nexthop_ipip_init(mlxsw_sp, nh, ipip_entry);
return 0;
}
}
nh->type = MLXSW_SP_NEXTHOP_TYPE_ETH;
@ -3545,6 +3562,18 @@ static void mlxsw_sp_nexthop_rif_update(struct mlxsw_sp *mlxsw_sp,
}
}
static void mlxsw_sp_nexthop_rif_migrate(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_rif *old_rif,
struct mlxsw_sp_rif *new_rif)
{
struct mlxsw_sp_nexthop *nh;
list_splice_init(&old_rif->nexthop_list, &new_rif->nexthop_list);
list_for_each_entry(nh, &new_rif->nexthop_list, rif_list_node)
nh->rif = new_rif;
mlxsw_sp_nexthop_rif_update(mlxsw_sp, new_rif);
}
static void mlxsw_sp_nexthop_rif_gone_sync(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_rif *rif)
{
@ -3996,7 +4025,7 @@ mlxsw_sp_fib4_entry_type_set(struct mlxsw_sp *mlxsw_sp,
case RTN_LOCAL:
ipip_entry = mlxsw_sp_ipip_entry_find_by_decap(mlxsw_sp, dev,
MLXSW_SP_L3_PROTO_IPV4, dip);
if (ipip_entry) {
if (ipip_entry && ipip_entry->ol_dev->flags & IFF_UP) {
fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_IPIP_DECAP;
return mlxsw_sp_fib_entry_decap_init(mlxsw_sp,
fib_entry,
@ -4694,21 +4723,21 @@ static int mlxsw_sp_nexthop6_type_init(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop *nh,
const struct rt6_info *rt)
{
struct mlxsw_sp_router *router = mlxsw_sp->router;
const struct mlxsw_sp_ipip_ops *ipip_ops;
struct mlxsw_sp_ipip_entry *ipip_entry;
struct net_device *dev = rt->dst.dev;
enum mlxsw_sp_ipip_type ipipt;
struct mlxsw_sp_rif *rif;
int err;
if (mlxsw_sp_nexthop6_ipip_type(mlxsw_sp, rt, &ipipt) &&
router->ipip_ops_arr[ipipt]->can_offload(mlxsw_sp, dev,
MLXSW_SP_L3_PROTO_IPV6)) {
nh->type = MLXSW_SP_NEXTHOP_TYPE_IPIP;
err = mlxsw_sp_nexthop_ipip_init(mlxsw_sp, nh, dev);
if (err)
return err;
mlxsw_sp_nexthop_rif_init(nh, &nh->ipip_entry->ol_lb->common);
return 0;
ipip_entry = mlxsw_sp_ipip_entry_find_by_ol_dev(mlxsw_sp, dev);
if (ipip_entry) {
ipip_ops = mlxsw_sp->router->ipip_ops_arr[ipip_entry->ipipt];
if (ipip_ops->can_offload(mlxsw_sp, dev,
MLXSW_SP_L3_PROTO_IPV6)) {
nh->type = MLXSW_SP_NEXTHOP_TYPE_IPIP;
mlxsw_sp_nexthop_ipip_init(mlxsw_sp, nh, ipip_entry);
return 0;
}
}
nh->type = MLXSW_SP_NEXTHOP_TYPE_ETH;