lkml.org 
[lkml]   [2024]   [Apr]   [24]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH net-next] net: qede: flower: validate control flags
Date
This driver currently doesn't support any flower control flags.

Implement check for control flags, such as can be set through
`tc flower ... ip_flags frag`.

Since qede_parse_flow_attr() are called by both qede_add_tc_flower_fltr()
and qede_flow_spec_to_rule(), as the latter doesn't having access to
extack, then flow_rule_*_control_flags() can't be used in this driver.

This patch therefore re-implements flow_rule_match_has_control_flags(),
but with error messaging via DP_NOTICE, instead of NL_SET_ERR_MSG_FMT_MOD.

So in case any control flags are masked, we call DP_NOTICE() and
return -EOPNOTSUPP.

Only compile-tested.

Signed-off-by: Asbjørn Sloth Tønnesen <ast@fiberby.net>
---

This is AFAICT the last driver which didn't validate these flags.

$ git grep FLOW_DISSECTOR_KEY_CONTROL drivers/
$ git grep 'flow_rule_.*_control_flags' drivers/

drivers/net/ethernet/qlogic/qede/qede_filter.c | 13 +++++++++++++
1 file changed, 13 insertions(+)

diff --git a/drivers/net/ethernet/qlogic/qede/qede_filter.c b/drivers/net/ethernet/qlogic/qede/qede_filter.c
index a5ac21a0ee33..40f72e700d8e 100644
--- a/drivers/net/ethernet/qlogic/qede/qede_filter.c
+++ b/drivers/net/ethernet/qlogic/qede/qede_filter.c
@@ -1843,6 +1843,19 @@ qede_parse_flow_attr(struct qede_dev *edev, __be16 proto,
return -EPROTONOSUPPORT;
}

+ if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_CONTROL)) {
+ struct flow_match_control match;
+
+ flow_rule_match_control(rule, &match);
+
+ if (match.mask->flags) {
+ DP_NOTICE(edev,
+ "Unsupported match on control.flags %#x",
+ match.mask->flags);
+ return -EOPNOTSUPP;
+ }
+ }
+
if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_BASIC)) {
struct flow_match_basic match;

--
2.43.0

\
 
 \ /
  Last update: 2024-04-24 15:43    [W:2.098 / U:0.048 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site