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From 54d02b39369e78ccdc913277f36d16b337d08437 Mon Sep 17 00:00:00 2001
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From: Alaa Hleihel <ahleihel@redhat.com>
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Date: Tue, 19 May 2020 07:48:34 -0400
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Subject: [PATCH 213/312] [netdrv] net/mlx5: ft: Check prio and chain sanity
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for ft offload
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Message-id: <20200519074934.6303-4-ahleihel@redhat.com>
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Patchwork-id: 310509
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Patchwork-instance: patchwork
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O-Subject: [RHEL8.3 BZ 1663246 03/63] net/mlx5: ft: Check prio and chain sanity for ft offload
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Bugzilla: 1663246
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RH-Acked-by: Marcelo Leitner <mleitner@redhat.com>
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RH-Acked-by: Jarod Wilson <jarod@redhat.com>
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RH-Acked-by: John Linville <linville@redhat.com>
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RH-Acked-by: Ivan Vecera <ivecera@redhat.com>
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RH-Acked-by: Tony Camuso <tcamuso@redhat.com>
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RH-Acked-by: Kamal Heib <kheib@redhat.com>
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Bugzilla: http://bugzilla.redhat.com/1663246
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Upstream: v5.6-rc1
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commit 82270e12544ee76ea9a3117a769a6d466a2e646b
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Author: Paul Blakey <paulb@mellanox.com>
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Date: Tue Nov 26 14:15:00 2019 +0200
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net/mlx5: ft: Check prio and chain sanity for ft offload
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Before changing the chain from original chain to ft offload chain,
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make sure user doesn't actually use chains.
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While here, normalize the prio range to that which we support.
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Signed-off-by: Paul Blakey <paulb@mellanox.com>
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Reviewed-by: Roi Dayan <roid@mellanox.com>
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Reviewed-by: Mark Bloch <markb@mellanox.com>
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Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
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Signed-off-by: Alaa Hleihel <ahleihel@redhat.com>
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Signed-off-by: Frantisek Hrbata <fhrbata@redhat.com>
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---
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drivers/net/ethernet/mellanox/mlx5/core/en_rep.c | 27 ++++++++++++++++++------
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1 file changed, 20 insertions(+), 7 deletions(-)
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diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c b/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c
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index 406fb642f2d4..bde634ca85d0 100644
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--- a/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c
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+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c
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@@ -1223,8 +1223,7 @@ static int mlx5e_rep_setup_tc_cb(enum tc_setup_type type, void *type_data,
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static int mlx5e_rep_setup_ft_cb(enum tc_setup_type type, void *type_data,
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void *cb_priv)
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{
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- struct flow_cls_offload *f = type_data;
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- struct flow_cls_offload cls_flower;
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+ struct flow_cls_offload tmp, *f = type_data;
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struct mlx5e_priv *priv = cb_priv;
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struct mlx5_eswitch *esw;
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unsigned long flags;
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@@ -1237,16 +1236,30 @@ static int mlx5e_rep_setup_ft_cb(enum tc_setup_type type, void *type_data,
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switch (type) {
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case TC_SETUP_CLSFLOWER:
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- if (!mlx5_eswitch_prios_supported(esw) || f->common.chain_index)
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+ memcpy(&tmp, f, sizeof(*f));
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+
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+ if (!mlx5_eswitch_prios_supported(esw) ||
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+ tmp.common.chain_index)
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return -EOPNOTSUPP;
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/* Re-use tc offload path by moving the ft flow to the
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* reserved ft chain.
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+ *
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+ * FT offload can use prio range [0, INT_MAX], so we
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+ * normalize it to range [1, mlx5_eswitch_get_prio_range(esw)]
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+ * as with tc, where prio 0 isn't supported.
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+ *
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+ * We only support chain 0 of FT offload.
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*/
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- memcpy(&cls_flower, f, sizeof(*f));
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- cls_flower.common.chain_index = mlx5_eswitch_get_ft_chain(esw);
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- err = mlx5e_rep_setup_tc_cls_flower(priv, &cls_flower, flags);
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- memcpy(&f->stats, &cls_flower.stats, sizeof(f->stats));
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+ if (tmp.common.prio >= mlx5_eswitch_get_prio_range(esw))
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+ return -EOPNOTSUPP;
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+ if (tmp.common.chain_index != 0)
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+ return -EOPNOTSUPP;
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+
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+ tmp.common.chain_index = mlx5_eswitch_get_ft_chain(esw);
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+ tmp.common.prio++;
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+ err = mlx5e_rep_setup_tc_cls_flower(priv, &tmp, flags);
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+ memcpy(&f->stats, &tmp.stats, sizeof(f->stats));
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return err;
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default:
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return -EOPNOTSUPP;
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--
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2.13.6
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