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ice: change q_index variable type to s16 to store -1 value

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Fix Flow Director not allowing to re-map traffic to 0th queue when action
is configured to drop (and vice versa).

The current implementation of ethtool callback in the ice driver forbids
change Flow Director action from 0 to -1 and from -1 to 0 with an error,
e.g:

 # ethtool -U eth2 flow-type tcp4 src-ip 1.1.1.1 loc 1 action 0
 # ethtool -U eth2 flow-type tcp4 src-ip 1.1.1.1 loc 1 action -1
 rmgr: Cannot insert RX class rule: Invalid argument

We set the value of `u16 q_index = 0` at the beginning of the function
ice_set_fdir_input_set(). In case of "drop traffic" action (which is
equal to -1 in ethtool) we store the 0 value. Later, when want to change
traffic rule to redirect to queue with index 0 it returns an error
caused by duplicate found.

Fix this behaviour by change of the type of field `q_index` from u16 to s16
in `struct ice_fdir_fltr`. This allows to store -1 in the field in case
of "drop traffic" action. What is more, change the variable type in the
function ice_set_fdir_input_set() and assign at the beginning the new
`#define ICE_FDIR_NO_QUEUE_IDX` which is -1. Later, if the action is set
to another value (point specific queue index) the variable value is
overwritten in the function.

Fixes: cac2a27cd9 ("ice: Support IPv4 Flow Director filters")
Reviewed-by: Przemek Kitszel <przemyslaw.kitszel@intel.com>
Signed-off-by: Mateusz Polchlopek <mateusz.polchlopek@intel.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Tested-by: Pucha Himasekhar Reddy <himasekharx.reddy.pucha@intel.com> (A Contingent worker at Intel)
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
This commit is contained in:
Mateusz Polchlopek 2024-10-28 12:59:22 -04:00 committed by Tony Nguyen
parent e9942bfe49
commit 64502dac97
2 changed files with 5 additions and 2 deletions
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3
drivers/net/ethernet/intel/ice/ice_ethtool_fdir.c
View File

@ -1830,11 +1830,12 @@ static int
ice_set_fdir_input_set(struct ice_vsi *vsi, struct ethtool_rx_flow_spec *fsp,
struct ice_fdir_fltr *input)
{
u16 dest_vsi, q_index = 0;
s16 q_index = ICE_FDIR_NO_QUEUE_IDX;
u16 orig_q_index = 0;
struct ice_pf *pf;
struct ice_hw *hw;
int flow_type;
u16 dest_vsi;
u8 dest_ctl;
if (!vsi || !fsp || !input)

4
drivers/net/ethernet/intel/ice/ice_fdir.h
View File

@ -53,6 +53,8 @@
*/
#define ICE_FDIR_IPV4_PKT_FLAG_MF 0x20
#define ICE_FDIR_NO_QUEUE_IDX -1
enum ice_fltr_prgm_desc_dest {
ICE_FLTR_PRGM_DESC_DEST_DROP_PKT,
ICE_FLTR_PRGM_DESC_DEST_DIRECT_PKT_QINDEX,
@ -186,7 +188,7 @@ struct ice_fdir_fltr {
u16 flex_fltr;
/* filter control */
u16 q_index;
s16 q_index;
u16 orig_q_index;
u16 dest_vsi;
u8 dest_ctl;