[dpdk-stable] [PATCH 1/8] net/ice/base: fix GTP-U inner RSS IPv4 IPv6 co-exist

[Qi Zhang <qi.z.zhang@intel.com>]

An IP header combined with GTP-U header should be regarded as
inner layer for RSS, otherwise it mess the field vector between
an IPv4 rule and IPv6 rule e.g:

testpmd> flow create 0 ingress patterh eth / ipv4 / udp / gtpu / \
gtpu_psc  / ipv4 / udp / end actions rss types ipv4-udp end key_len \
0 queues end / end
testpmd> flow create 0 ingress patterh eth / ipv4 / udp / gtpu / \
gtpu_psc  / ipv6 / udp / end actions rss types ipv6-udp end key_len \
0 queues end / end

Fixes: b7d34ccc47b5 ("net/ice/base: packet encapsulation for RSS")
Cc: stable@dpdk.org

Signed-off-by: Qi Zhang <qi.z.zhang@intel.com>
---
 drivers/net/ice/base/ice_flow.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ice/base/ice_flow.c b/drivers/net/ice/base/ice_flow.c
index 6adcda844..272b24e70 100644
--- a/drivers/net/ice/base/ice_flow.c
+++ b/drivers/net/ice/base/ice_flow.c
@@ -3557,6 +3557,13 @@ ice_add_rss_cfg_sync(struct ice_hw *hw, u16 vsi_handle, u64 hashed_flds,
 	if (status)
 		goto exit;
 
+	/* don't do RSS for GTPU outer */
+	if (segs_cnt == ICE_RSS_OUTER_HEADERS &&
+	    (segs[segs_cnt - 1].hdrs & ICE_FLOW_SEG_HDR_GTPU)) {
+		printf("ignore gtpu\n");
+		return ICE_SUCCESS;
+	}
+
 	/* Search for a flow profile that has matching headers, hash fields
 	 * and has the input VSI associated to it. If found, no further
 	 * operations required and exit.
@@ -3672,7 +3679,8 @@ ice_add_rss_cfg(struct ice_hw *hw, u16 vsi_handle, u64 hashed_flds,
 
 	ice_acquire_lock(&hw->rss_locks);
 	status = ice_add_rss_cfg_sync(hw, vsi_handle, hashed_flds, addl_hdrs,
-				      ICE_RSS_OUTER_HEADERS, symm);
+					      ICE_RSS_OUTER_HEADERS, symm);
+
 	if (!status)
 		status = ice_add_rss_cfg_sync(hw, vsi_handle, hashed_flds,
 					      addl_hdrs, ICE_RSS_INNER_HEADERS,
-- 
2.13.6