From c9588e28123c563a355964c6ee8ca5dd28aebd6a Mon Sep 17 00:00:00 2001 From: Jiri Pirko Date: Sat, 27 Jul 2019 20:32:56 +0300 Subject: [PATCH] mlxsw: spectrum_acl: Track rules that forbid egress block bind Some matches and actions are not supported on egress. Track such rules and forbid a bind of block which contains them to egress. With this patch, the kernel tells the user he cannot do that: $ tc qdisc add dev ens16np1 ingress_block 22 clsact $ tc filter add block 22 protocol 802.1q pref 2 handle 101 flower vlan_id 100 skip_sw action pass $ tc qdisc add dev ens16np2 egress_block 22 clsact Error: mlxsw_spectrum: Block cannot be bound to egress because it contains unsupported rules. Signed-off-by: Jiri Pirko Signed-off-by: Ido Schimmel Signed-off-by: David S. Miller --- drivers/net/ethernet/mellanox/mlxsw/spectrum.c | 2 +- drivers/net/ethernet/mellanox/mlxsw/spectrum.h | 7 +++++-- drivers/net/ethernet/mellanox/mlxsw/spectrum_acl.c | 17 +++++++++++++---- drivers/net/ethernet/mellanox/mlxsw/spectrum_flower.c | 11 +++++++++++ 4 files changed, 30 insertions(+), 7 deletions(-) diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c index 7e8a54068d92..9277b3f125e8 100644 --- a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c +++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c @@ -1625,7 +1625,7 @@ mlxsw_sp_setup_tc_block_flower_bind(struct mlxsw_sp_port *mlxsw_sp_port, } flow_block_cb_incref(block_cb); err = mlxsw_sp_acl_block_bind(mlxsw_sp, acl_block, - mlxsw_sp_port, ingress); + mlxsw_sp_port, ingress, f->extack); if (err) goto err_block_bind; diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum.h b/drivers/net/ethernet/mellanox/mlxsw/spectrum.h index 131f62ce9297..c78d93afbb9d 100644 --- a/drivers/net/ethernet/mellanox/mlxsw/spectrum.h +++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum.h @@ -623,7 +623,8 @@ struct mlxsw_sp_acl_rule_info { unsigned int priority; struct mlxsw_afk_element_values values; struct mlxsw_afa_block *act_block; - u8 action_created:1; + u8 action_created:1, + egress_bind_blocker:1; unsigned int counter_index; }; @@ -642,6 +643,7 @@ struct mlxsw_sp_acl_block { struct mlxsw_sp *mlxsw_sp; unsigned int rule_count; unsigned int disable_count; + unsigned int egress_blocker_rule_count; struct net *net; }; @@ -657,7 +659,8 @@ void mlxsw_sp_acl_block_destroy(struct mlxsw_sp_acl_block *block); int mlxsw_sp_acl_block_bind(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_acl_block *block, struct mlxsw_sp_port *mlxsw_sp_port, - bool ingress); + bool ingress, + struct netlink_ext_ack *extack); int mlxsw_sp_acl_block_unbind(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_acl_block *block, struct mlxsw_sp_port *mlxsw_sp_port, diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_acl.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_acl.c index e8ac90564dbe..1aaab8446270 100644 --- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_acl.c +++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_acl.c @@ -239,7 +239,8 @@ mlxsw_sp_acl_block_lookup(struct mlxsw_sp_acl_block *block, int mlxsw_sp_acl_block_bind(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_acl_block *block, struct mlxsw_sp_port *mlxsw_sp_port, - bool ingress) + bool ingress, + struct netlink_ext_ack *extack) { struct mlxsw_sp_acl_block_binding *binding; int err; @@ -247,6 +248,11 @@ int mlxsw_sp_acl_block_bind(struct mlxsw_sp *mlxsw_sp, if (WARN_ON(mlxsw_sp_acl_block_lookup(block, mlxsw_sp_port, ingress))) return -EEXIST; + if (!ingress && block->egress_blocker_rule_count) { + NL_SET_ERR_MSG_MOD(extack, "Block cannot be bound to egress because it contains unsupported rules"); + return -EOPNOTSUPP; + } + binding = kzalloc(sizeof(*binding), GFP_KERNEL); if (!binding) return -ENOMEM; @@ -672,6 +678,7 @@ int mlxsw_sp_acl_rule_add(struct mlxsw_sp *mlxsw_sp, { struct mlxsw_sp_acl_ruleset *ruleset = rule->ruleset; const struct mlxsw_sp_acl_profile_ops *ops = ruleset->ht_key.ops; + struct mlxsw_sp_acl_block *block = ruleset->ht_key.block; int err; err = ops->rule_add(mlxsw_sp, ruleset->priv, rule->priv, rule->rulei); @@ -689,14 +696,14 @@ int mlxsw_sp_acl_rule_add(struct mlxsw_sp *mlxsw_sp, * one, to be directly bound to device. The rest of the * rulesets are bound by "Goto action set". */ - err = mlxsw_sp_acl_ruleset_block_bind(mlxsw_sp, ruleset, - ruleset->ht_key.block); + err = mlxsw_sp_acl_ruleset_block_bind(mlxsw_sp, ruleset, block); if (err) goto err_ruleset_block_bind; } list_add_tail(&rule->list, &mlxsw_sp->acl->rules); - ruleset->ht_key.block->rule_count++; + block->rule_count++; + block->egress_blocker_rule_count += rule->rulei->egress_bind_blocker; return 0; err_ruleset_block_bind: @@ -712,7 +719,9 @@ void mlxsw_sp_acl_rule_del(struct mlxsw_sp *mlxsw_sp, { struct mlxsw_sp_acl_ruleset *ruleset = rule->ruleset; const struct mlxsw_sp_acl_profile_ops *ops = ruleset->ht_key.ops; + struct mlxsw_sp_acl_block *block = ruleset->ht_key.block; + block->egress_blocker_rule_count -= rule->rulei->egress_bind_blocker; ruleset->ht_key.block->rule_count--; list_del(&rule->list); if (!ruleset->ht_key.chain_index && diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_flower.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_flower.c index 1eeac8a36ead..c86d582dafbe 100644 --- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_flower.c +++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_flower.c @@ -83,6 +83,11 @@ static int mlxsw_sp_flower_parse_actions(struct mlxsw_sp *mlxsw_sp, return -EOPNOTSUPP; } + /* Forbid block with this rulei to be bound + * to egress in future. + */ + rulei->egress_bind_blocker = 1; + fid = mlxsw_sp_acl_dummy_fid(mlxsw_sp); fid_index = mlxsw_sp_fid_index(fid); err = mlxsw_sp_acl_rulei_act_fid_set(mlxsw_sp, rulei, @@ -395,6 +400,12 @@ static int mlxsw_sp_flower_parse(struct mlxsw_sp *mlxsw_sp, NL_SET_ERR_MSG_MOD(f->common.extack, "vlan_id key is not supported on egress"); return -EOPNOTSUPP; } + + /* Forbid block with this rulei to be bound + * to egress in future. + */ + rulei->egress_bind_blocker = 1; + if (match.mask->vlan_id != 0) mlxsw_sp_acl_rulei_keymask_u32(rulei, MLXSW_AFK_ELEMENT_VID, -- 2.11.0