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Message-Id: <1547754682-49662-2-git-send-email-xiangxia.m.yue@gmail.com> Date: Thu, 17 Jan 2019 11:51:22 -0800 From: xiangxia.m.yue@...il.com To: saeedm@...lanox.com, gerlitz.or@...il.com Cc: netdev@...r.kernel.org, Tonghao Zhang <xiangxia.m.yue@...il.com> Subject: [PATCH net-next v2 2/2] net/mlx5e: Don't overwrite pedit action when multiple pedit used From: Tonghao Zhang <xiangxia.m.yue@...il.com> In some case, we may use multiple pedit actions to modify packets. The command shown as below: the last pedit action is effective. $ tc filter add dev netdev_rep parent ffff: protocol ip prio 1 \ flower skip_sw ip_proto icmp dst_ip 3.3.3.3 \ action pedit ex munge ip dst set 192.168.1.100 pipe \ action pedit ex munge eth src set 00:00:00:00:00:01 pipe \ action pedit ex munge eth dst set 00:00:00:00:00:02 pipe \ action csum ip pipe \ action tunnel_key set src_ip 1.1.1.100 dst_ip 1.1.1.200 dst_port 4789 id 100 \ action mirred egress redirect dev vxlan0 To fix it, we add max_mod_hdr_actions to mlx5e_tc_flow_parse_attr struction, max_mod_hdr_actions will store the max pedit action number we support and num_mod_hdr_actions indicates how many pedit action we used, and store all pedit action to mod_hdr_actions. Signed-off-by: Tonghao Zhang <xiangxia.m.yue@...il.com> --- drivers/net/ethernet/mellanox/mlx5/core/en_tc.c | 19 ++++++++++++------- 1 file changed, 12 insertions(+), 7 deletions(-) diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c index cae6c6d..2ee377a 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c @@ -128,6 +128,7 @@ struct mlx5e_tc_flow_parse_attr { struct net_device *filter_dev; struct mlx5_flow_spec spec; int num_mod_hdr_actions; + int max_mod_hdr_actions; void *mod_hdr_actions; int mirred_ifindex[MLX5_MAX_FLOW_FWD_VPORTS]; }; @@ -1960,8 +1961,9 @@ static int offload_pedit_fields(struct pedit_headers *masks, add_vals = &vals[TCA_PEDIT_KEY_EX_CMD_ADD]; action_size = MLX5_UN_SZ_BYTES(set_action_in_add_action_in_auto); - action = parse_attr->mod_hdr_actions; - max_actions = parse_attr->num_mod_hdr_actions; + action = parse_attr->mod_hdr_actions + + parse_attr->num_mod_hdr_actions * action_size; + max_actions = parse_attr->max_mod_hdr_actions; nactions = 0; for (i = 0; i < ARRAY_SIZE(fields); i++) { @@ -2048,7 +2050,7 @@ static int offload_pedit_fields(struct pedit_headers *masks, nactions++; } - parse_attr->num_mod_hdr_actions = nactions; + parse_attr->num_mod_hdr_actions += nactions; return 0; } @@ -2073,7 +2075,8 @@ static int alloc_mod_hdr_actions(struct mlx5e_priv *priv, if (!parse_attr->mod_hdr_actions) return -ENOMEM; - parse_attr->num_mod_hdr_actions = max_actions; + parse_attr->max_mod_hdr_actions = max_actions; + parse_attr->num_mod_hdr_actions = 0; return 0; } @@ -2119,9 +2122,11 @@ static int parse_tc_pedit_action(struct mlx5e_priv *priv, goto out_err; } - err = alloc_mod_hdr_actions(priv, a, namespace, parse_attr); - if (err) - goto out_err; + if (!parse_attr->mod_hdr_actions) { + err = alloc_mod_hdr_actions(priv, a, namespace, parse_attr); + if (err) + goto out_err; + } err = offload_pedit_fields(masks, vals, parse_attr, extack); if (err < 0) -- 1.8.3.1
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