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Date: Sun, 19 Sep 2021 10:26:27 +0300 From: Roi Dayan <roid@...dia.com> To: Abhiram R N <abhiramrn@...il.com> CC: <arn@...hat.com>, <hakhande@...hat.com>, <saeedm@...dia.com>, "Leon Romanovsky" <leon@...nel.org>, "David S. Miller" <davem@...emloft.net>, "Jakub Kicinski" <kuba@...nel.org>, <netdev@...r.kernel.org>, <linux-rdma@...r.kernel.org>, <linux-kernel@...r.kernel.org> Subject: Re: [PATCH net-next v4] net/mlx5e: Add extack msgs related to TC for better debug so what is the diff between v3 and v4? when u send a new revision you should specify what changed to help with the review. On 2021-09-14 2:50 PM, Abhiram R N wrote: > As multiple places EOPNOTSUPP and EINVAL is returned from driver > it becomes difficult to understand the reason only with error code. > With the netlink extack message exact reason will be known and will > aid in debugging. > > Signed-off-by: Abhiram R N <abhiramrn@...il.com> > --- > .../net/ethernet/mellanox/mlx5/core/en_tc.c | 106 +++++++++++++----- > 1 file changed, 76 insertions(+), 30 deletions(-) > > diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c > index ba8164792016..0272ba429c81 100644 > --- a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c > +++ b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c > @@ -1896,8 +1896,10 @@ static int parse_tunnel_attr(struct mlx5e_priv *priv, > bool needs_mapping, sets_mapping; > int err; > > - if (!mlx5e_is_eswitch_flow(flow)) > + if (!mlx5e_is_eswitch_flow(flow)) { > + NL_SET_ERR_MSG_MOD(extack, "Match on tunnel is not supported"); > return -EOPNOTSUPP; > + } > > needs_mapping = !!flow->attr->chain; > sets_mapping = flow_requires_tunnel_mapping(flow->attr->chain, f); > @@ -2269,8 +2271,10 @@ static int __parse_cls_flower(struct mlx5e_priv *priv, > addr_type = match.key->addr_type; > > /* the HW doesn't support frag first/later */ > - if (match.mask->flags & FLOW_DIS_FIRST_FRAG) > + if (match.mask->flags & FLOW_DIS_FIRST_FRAG) { > + NL_SET_ERR_MSG_MOD(extack, "Match on frag first/later is not supported"); > return -EOPNOTSUPP; > + } > > if (match.mask->flags & FLOW_DIS_IS_FRAGMENT) { > MLX5_SET(fte_match_set_lyr_2_4, headers_c, frag, 1); > @@ -2437,8 +2441,11 @@ static int __parse_cls_flower(struct mlx5e_priv *priv, > switch (ip_proto) { > case IPPROTO_ICMP: > if (!(MLX5_CAP_GEN(priv->mdev, flex_parser_protocols) & > - MLX5_FLEX_PROTO_ICMP)) > + MLX5_FLEX_PROTO_ICMP)) { > + NL_SET_ERR_MSG_MOD(extack, > + "Match on Flex protocols for ICMP is not supported"); > return -EOPNOTSUPP; > + } > MLX5_SET(fte_match_set_misc3, misc_c_3, icmp_type, > match.mask->type); > MLX5_SET(fte_match_set_misc3, misc_v_3, icmp_type, > @@ -2450,8 +2457,11 @@ static int __parse_cls_flower(struct mlx5e_priv *priv, > break; > case IPPROTO_ICMPV6: > if (!(MLX5_CAP_GEN(priv->mdev, flex_parser_protocols) & > - MLX5_FLEX_PROTO_ICMPV6)) > + MLX5_FLEX_PROTO_ICMPV6)) { > + NL_SET_ERR_MSG_MOD(extack, > + "Match on Flex protocols for ICMPV6 is not supported"); > return -EOPNOTSUPP; > + } > MLX5_SET(fte_match_set_misc3, misc_c_3, icmpv6_type, > match.mask->type); > MLX5_SET(fte_match_set_misc3, misc_v_3, icmpv6_type, > @@ -2557,15 +2567,19 @@ static int pedit_header_offsets[] = { > #define pedit_header(_ph, _htype) ((void *)(_ph) + pedit_header_offsets[_htype]) > > static int set_pedit_val(u8 hdr_type, u32 mask, u32 val, u32 offset, > - struct pedit_headers_action *hdrs) > + struct pedit_headers_action *hdrs, > + struct netlink_ext_ack *extack) > { > u32 *curr_pmask, *curr_pval; > > curr_pmask = (u32 *)(pedit_header(&hdrs->masks, hdr_type) + offset); > curr_pval = (u32 *)(pedit_header(&hdrs->vals, hdr_type) + offset); > > - if (*curr_pmask & mask) /* disallow acting twice on the same location */ > + if (*curr_pmask & mask) { /* disallow acting twice on the same location */ > + NL_SET_ERR_MSG_MOD(extack, > + "curr_pmask and new mask same. Acting twice on same location"); > goto out_err; > + } > > *curr_pmask |= mask; > *curr_pval |= (val & mask); > @@ -2898,7 +2912,7 @@ parse_pedit_to_modify_hdr(struct mlx5e_priv *priv, > val = act->mangle.val; > offset = act->mangle.offset; > > - err = set_pedit_val(htype, ~mask, val, offset, &hdrs[cmd]); > + err = set_pedit_val(htype, ~mask, val, offset, &hdrs[cmd], extack); > if (err) > goto out_err; > > @@ -2918,8 +2932,10 @@ parse_pedit_to_reformat(struct mlx5e_priv *priv, > u32 mask, val, offset; > u32 *p; > > - if (act->id != FLOW_ACTION_MANGLE) > + if (act->id != FLOW_ACTION_MANGLE) { > + NL_SET_ERR_MSG_MOD(extack, "Unsupported action id"); > return -EOPNOTSUPP; > + } > > if (act->mangle.htype != FLOW_ACT_MANGLE_HDR_TYPE_ETH) { > NL_SET_ERR_MSG_MOD(extack, "Only Ethernet modification is supported"); > @@ -3368,12 +3384,16 @@ static int parse_tc_nic_actions(struct mlx5e_priv *priv, > u32 action = 0; > int err, i; > > - if (!flow_action_has_entries(flow_action)) > + if (!flow_action_has_entries(flow_action)) { > + NL_SET_ERR_MSG_MOD(extack, "Flow Action doesn't have any entries"); > return -EINVAL; > + } > > if (!flow_action_hw_stats_check(flow_action, extack, > - FLOW_ACTION_HW_STATS_DELAYED_BIT)) > + FLOW_ACTION_HW_STATS_DELAYED_BIT)) { > + NL_SET_ERR_MSG_MOD(extack, "Flow Action HW stats check not supported"); > return -EOPNOTSUPP; > + } > > nic_attr = attr->nic_attr; > nic_attr->flow_tag = MLX5_FS_DEFAULT_FLOW_TAG; > @@ -3462,7 +3482,8 @@ static int parse_tc_nic_actions(struct mlx5e_priv *priv, > flow_flag_set(flow, CT); > break; > default: > - NL_SET_ERR_MSG_MOD(extack, "The offload action is not supported"); > + NL_SET_ERR_MSG_MOD(extack, > + "The offload action is not supported in NIC action"); > return -EOPNOTSUPP; > } > } > @@ -3517,19 +3538,25 @@ static bool is_merged_eswitch_vfs(struct mlx5e_priv *priv, > static int parse_tc_vlan_action(struct mlx5e_priv *priv, > const struct flow_action_entry *act, > struct mlx5_esw_flow_attr *attr, > - u32 *action) > + u32 *action, > + struct netlink_ext_ack *extack) > { > u8 vlan_idx = attr->total_vlan; > > - if (vlan_idx >= MLX5_FS_VLAN_DEPTH) > + if (vlan_idx >= MLX5_FS_VLAN_DEPTH) { > + NL_SET_ERR_MSG_MOD(extack, "Total vlans used is greater than supported"); > return -EOPNOTSUPP; > + } > > switch (act->id) { > case FLOW_ACTION_VLAN_POP: > if (vlan_idx) { > if (!mlx5_eswitch_vlan_actions_supported(priv->mdev, > - MLX5_FS_VLAN_DEPTH)) > + MLX5_FS_VLAN_DEPTH)) { > + NL_SET_ERR_MSG_MOD(extack, > + "vlan pop action is not supported"); > return -EOPNOTSUPP; > + } > > *action |= MLX5_FLOW_CONTEXT_ACTION_VLAN_POP_2; > } else { > @@ -3545,20 +3572,27 @@ static int parse_tc_vlan_action(struct mlx5e_priv *priv, > > if (vlan_idx) { > if (!mlx5_eswitch_vlan_actions_supported(priv->mdev, > - MLX5_FS_VLAN_DEPTH)) > + MLX5_FS_VLAN_DEPTH)) { > + NL_SET_ERR_MSG_MOD(extack, > + "vlan push action is not supported for vlan depth > 1"); > return -EOPNOTSUPP; > + } > > *action |= MLX5_FLOW_CONTEXT_ACTION_VLAN_PUSH_2; > } else { > if (!mlx5_eswitch_vlan_actions_supported(priv->mdev, 1) && > (act->vlan.proto != htons(ETH_P_8021Q) || > - act->vlan.prio)) > + act->vlan.prio)) { > + NL_SET_ERR_MSG_MOD(extack, > + "vlan push action is not supported"); > return -EOPNOTSUPP; > + } > > *action |= MLX5_FLOW_CONTEXT_ACTION_VLAN_PUSH; > } > break; > default: > + NL_SET_ERR_MSG_MOD(extack, "Unexpected action id for VLAN"); > return -EINVAL; > } > > @@ -3592,7 +3626,8 @@ static struct net_device *get_fdb_out_dev(struct net_device *uplink_dev, > static int add_vlan_push_action(struct mlx5e_priv *priv, > struct mlx5_flow_attr *attr, > struct net_device **out_dev, > - u32 *action) > + u32 *action, > + struct netlink_ext_ack *extack) > { > struct net_device *vlan_dev = *out_dev; > struct flow_action_entry vlan_act = { > @@ -3603,7 +3638,7 @@ static int add_vlan_push_action(struct mlx5e_priv *priv, > }; > int err; > > - err = parse_tc_vlan_action(priv, &vlan_act, attr->esw_attr, action); > + err = parse_tc_vlan_action(priv, &vlan_act, attr->esw_attr, action, extack); > if (err) > return err; > > @@ -3614,14 +3649,15 @@ static int add_vlan_push_action(struct mlx5e_priv *priv, > return -ENODEV; > > if (is_vlan_dev(*out_dev)) > - err = add_vlan_push_action(priv, attr, out_dev, action); > + err = add_vlan_push_action(priv, attr, out_dev, action, extack); > > return err; > } > > static int add_vlan_pop_action(struct mlx5e_priv *priv, > struct mlx5_flow_attr *attr, > - u32 *action) > + u32 *action, > + struct netlink_ext_ack *extack) > { > struct flow_action_entry vlan_act = { > .id = FLOW_ACTION_VLAN_POP, > @@ -3631,7 +3667,7 @@ static int add_vlan_pop_action(struct mlx5e_priv *priv, > nest_level = attr->parse_attr->filter_dev->lower_level - > priv->netdev->lower_level; > while (nest_level--) { > - err = parse_tc_vlan_action(priv, &vlan_act, attr->esw_attr, action); > + err = parse_tc_vlan_action(priv, &vlan_act, attr->esw_attr, action, extack); > if (err) > return err; > } > @@ -3753,12 +3789,16 @@ static int parse_tc_fdb_actions(struct mlx5e_priv *priv, > int err, i, if_count = 0; > bool mpls_push = false; > > - if (!flow_action_has_entries(flow_action)) > + if (!flow_action_has_entries(flow_action)) { > + NL_SET_ERR_MSG_MOD(extack, "Flow action doesn't have any entries"); > return -EINVAL; > + } > > if (!flow_action_hw_stats_check(flow_action, extack, > - FLOW_ACTION_HW_STATS_DELAYED_BIT)) > + FLOW_ACTION_HW_STATS_DELAYED_BIT)) { > + NL_SET_ERR_MSG_MOD(extack, "Flow Action HW stats check is not supported"); > return -EOPNOTSUPP; > + } > > esw_attr = attr->esw_attr; > parse_attr = attr->parse_attr; > @@ -3902,14 +3942,14 @@ static int parse_tc_fdb_actions(struct mlx5e_priv *priv, > if (is_vlan_dev(out_dev)) { > err = add_vlan_push_action(priv, attr, > &out_dev, > - &action); > + &action, extack); > if (err) > return err; > } > > if (is_vlan_dev(parse_attr->filter_dev)) { > err = add_vlan_pop_action(priv, attr, > - &action); > + &action, extack); > if (err) > return err; > } > @@ -3955,10 +3995,13 @@ static int parse_tc_fdb_actions(struct mlx5e_priv *priv, > break; > case FLOW_ACTION_TUNNEL_ENCAP: > info = act->tunnel; > - if (info) > + if (info) { > encap = true; > - else > + } else { > + NL_SET_ERR_MSG_MOD(extack, > + "Zero tunnel attributes is not supported"); > return -EOPNOTSUPP; > + } > > break; > case FLOW_ACTION_VLAN_PUSH: > @@ -3972,7 +4015,7 @@ static int parse_tc_fdb_actions(struct mlx5e_priv *priv, > act, parse_attr, hdrs, > &action, extack); > } else { > - err = parse_tc_vlan_action(priv, act, esw_attr, &action); > + err = parse_tc_vlan_action(priv, act, esw_attr, &action, extack); > } > if (err) > return err; > @@ -4025,7 +4068,8 @@ static int parse_tc_fdb_actions(struct mlx5e_priv *priv, > flow_flag_set(flow, SAMPLE); > break; > default: > - NL_SET_ERR_MSG_MOD(extack, "The offload action is not supported"); > + NL_SET_ERR_MSG_MOD(extack, > + "The offload action is not supported in FDB action"); > return -EOPNOTSUPP; > } > } > @@ -4733,8 +4777,10 @@ static int scan_tc_matchall_fdb_actions(struct mlx5e_priv *priv, > return -EOPNOTSUPP; > } > > - if (!flow_action_basic_hw_stats_check(flow_action, extack)) > + if (!flow_action_basic_hw_stats_check(flow_action, extack)) { > + NL_SET_ERR_MSG_MOD(extack, "Flow Action HW stats check is not supported"); > return -EOPNOTSUPP; > + } > > flow_action_for_each(i, act, flow_action) { > switch (act->id) { >
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