[RFC PATCH net-next 3/5] flow_offload: Reject matching on layer 2 miss
From: Ido Schimmel <idosch@nvidia.com>
Date: 2023-05-09 07:06:21
Also in:
bridge
Subsystem:
marvell prestera ethernet switch driver, mellanox ethernet driver (mlx5e), mellanox ethernet switch drivers, mellanox mlx5 core vpi driver, networking drivers, ocelot ethernet switch driver, the rest · Maintainers:
Elad Nachman, Saeed Mahameed, Tariq Toukan, Mark Bloch, Ido Schimmel, Petr Machata, Leon Romanovsky, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Vladimir Oltean, Linus Torvalds
Adjust drivers that support the 'FLOW_DISSECTOR_KEY_META' key to reject filters that try to match on the newly added layer 2 miss option. Add an extack message to clearly communicate the failure reason to user space. Example: # tc filter add dev swp1 egress pref 1 proto all flower skip_sw l2_miss true action drop Error: mlxsw_spectrum: Can't match on "l2_miss". We have an error talking to the kernel Signed-off-by: Ido Schimmel <idosch@nvidia.com> --- .../net/ethernet/marvell/prestera/prestera_flower.c | 6 ++++++ drivers/net/ethernet/mellanox/mlx5/core/en_tc.c | 6 ++++++ drivers/net/ethernet/mellanox/mlxsw/spectrum_flower.c | 6 ++++++ drivers/net/ethernet/mscc/ocelot_flower.c | 10 ++++++++++ 4 files changed, 28 insertions(+)
diff --git a/drivers/net/ethernet/marvell/prestera/prestera_flower.c b/drivers/net/ethernet/marvell/prestera/prestera_flower.c
index 91a478b75cbf..3e20e71b0f81 100644
--- a/drivers/net/ethernet/marvell/prestera/prestera_flower.c
+++ b/drivers/net/ethernet/marvell/prestera/prestera_flower.c@@ -148,6 +148,12 @@ static int prestera_flower_parse_meta(struct prestera_acl_rule *rule, __be16 key, mask; flow_rule_match_meta(f_rule, &match); + + if (match.mask->l2_miss) { + NL_SET_ERR_MSG_MOD(f->common.extack, "Can't match on \"l2_miss\""); + return -EOPNOTSUPP; + } + if (match.mask->ingress_ifindex != 0xFFFFFFFF) { NL_SET_ERR_MSG_MOD(f->common.extack, "Unsupported ingress ifindex mask");
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
index 728b82ce4031..516653568330 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c@@ -2586,6 +2586,12 @@ static int mlx5e_flower_parse_meta(struct net_device *filter_dev, return 0; flow_rule_match_meta(rule, &match); + + if (match.mask->l2_miss) { + NL_SET_ERR_MSG_MOD(f->common.extack, "Can't match on \"l2_miss\""); + return -EOPNOTSUPP; + } + if (!match.mask->ingress_ifindex) return 0;
diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_flower.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_flower.c
index 594cdcb90b3d..6fec9223250b 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_flower.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_flower.c@@ -294,6 +294,12 @@ static int mlxsw_sp_flower_parse_meta(struct mlxsw_sp_acl_rule_info *rulei, return 0; flow_rule_match_meta(rule, &match); + + if (match.mask->l2_miss) { + NL_SET_ERR_MSG_MOD(f->common.extack, "Can't match on \"l2_miss\""); + return -EOPNOTSUPP; + } + if (match.mask->ingress_ifindex != 0xFFFFFFFF) { NL_SET_ERR_MSG_MOD(f->common.extack, "Unsupported ingress ifindex mask"); return -EINVAL;
diff --git a/drivers/net/ethernet/mscc/ocelot_flower.c b/drivers/net/ethernet/mscc/ocelot_flower.c
index ee052404eb55..e0916afcddfb 100644
--- a/drivers/net/ethernet/mscc/ocelot_flower.c
+++ b/drivers/net/ethernet/mscc/ocelot_flower.c@@ -592,6 +592,16 @@ ocelot_flower_parse_key(struct ocelot *ocelot, int port, bool ingress, return -EOPNOTSUPP; } + if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_META)) { + struct flow_match_meta match; + + flow_rule_match_meta(rule, &match); + if (match.mask->l2_miss) { + NL_SET_ERR_MSG_MOD(extack, "Can't match on \"l2_miss\""); + return -EOPNOTSUPP; + } + } + /* For VCAP ES0 (egress rewriter) we can match on the ingress port */ if (!ingress) { ret = ocelot_flower_parse_indev(ocelot, port, f, filter);
--
2.40.1