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Message-Id: <20220407073533.2422896-9-idosch@nvidia.com>
Date: Thu, 7 Apr 2022 10:35:27 +0300
From: Ido Schimmel <idosch@...dia.com>
To: netdev@...r.kernel.org
Cc: davem@...emloft.net, kuba@...nel.org, pabeni@...hat.com,
jhs@...atatu.com, xiyou.wangcong@...il.com, jiri@...nulli.us,
petrm@...dia.com, jianbol@...dia.com, roid@...dia.com,
vladbu@...dia.com, olteanv@...il.com, simon.horman@...igine.com,
baowen.zheng@...igine.com, marcelo.leitner@...il.com,
Ido Schimmel <idosch@...dia.com>
Subject: [PATCH net-next 08/14] net/sched: act_police: Add extack messages for offload failure
For better error reporting to user space, add extack messages when
police action offload fails.
Example:
# echo 1 > /sys/kernel/tracing/events/netlink/netlink_extack/enable
# tc filter add dev dummy0 ingress pref 1 proto all matchall skip_sw action police rate 100Mbit burst 10000
Error: cls_matchall: Failed to setup flow action.
We have an error talking to the kernel
# cat /sys/kernel/tracing/trace_pipe
tc-182 [000] b..1. 21.592969: netlink_extack: msg=act_police: Offload not supported when conform/exceed action is "reclassify"
tc-182 [000] ..... 21.592982: netlink_extack: msg=cls_matchall: Failed to setup flow action
# tc filter add dev dummy0 ingress pref 1 proto all matchall skip_sw action police rate 100Mbit burst 10000 conform-exceed drop/continue
Error: cls_matchall: Failed to setup flow action.
We have an error talking to the kernel
# cat /sys/kernel/tracing/trace_pipe
tc-184 [000] b..1. 38.882579: netlink_extack: msg=act_police: Offload not supported when conform/exceed action is "continue"
tc-184 [000] ..... 38.882593: netlink_extack: msg=cls_matchall: Failed to setup flow action
Signed-off-by: Ido Schimmel <idosch@...dia.com>
Reviewed-by: Petr Machata <petrm@...dia.com>
---
net/sched/act_police.c | 17 ++++++++++++++---
1 file changed, 14 insertions(+), 3 deletions(-)
diff --git a/net/sched/act_police.c b/net/sched/act_police.c
index 77c17e9b46d1..79c8901f66ab 100644
--- a/net/sched/act_police.c
+++ b/net/sched/act_police.c
@@ -419,7 +419,8 @@ static int tcf_police_search(struct net *net, struct tc_action **a, u32 index)
return tcf_idr_search(tn, a, index);
}
-static int tcf_police_act_to_flow_act(int tc_act, u32 *extval)
+static int tcf_police_act_to_flow_act(int tc_act, u32 *extval,
+ struct netlink_ext_ack *extack)
{
int act_id = -EOPNOTSUPP;
@@ -430,12 +431,20 @@ static int tcf_police_act_to_flow_act(int tc_act, u32 *extval)
act_id = FLOW_ACTION_DROP;
else if (tc_act == TC_ACT_PIPE)
act_id = FLOW_ACTION_PIPE;
+ else if (tc_act == TC_ACT_RECLASSIFY)
+ NL_SET_ERR_MSG_MOD(extack, "Offload not supported when conform/exceed action is \"reclassify\"");
+ else
+ NL_SET_ERR_MSG_MOD(extack, "Unsupported conform/exceed action offload");
} else if (TC_ACT_EXT_CMP(tc_act, TC_ACT_GOTO_CHAIN)) {
act_id = FLOW_ACTION_GOTO;
*extval = tc_act & TC_ACT_EXT_VAL_MASK;
} else if (TC_ACT_EXT_CMP(tc_act, TC_ACT_JUMP)) {
act_id = FLOW_ACTION_JUMP;
*extval = tc_act & TC_ACT_EXT_VAL_MASK;
+ } else if (tc_act == TC_ACT_UNSPEC) {
+ NL_SET_ERR_MSG_MOD(extack, "Offload not supported when conform/exceed action is \"continue\"");
+ } else {
+ NL_SET_ERR_MSG_MOD(extack, "Unsupported conform/exceed action offload");
}
return act_id;
@@ -467,14 +476,16 @@ static int tcf_police_offload_act_setup(struct tc_action *act, void *entry_data,
entry->police.mtu = tcf_police_tcfp_mtu(act);
act_id = tcf_police_act_to_flow_act(police->tcf_action,
- &entry->police.exceed.extval);
+ &entry->police.exceed.extval,
+ extack);
if (act_id < 0)
return act_id;
entry->police.exceed.act_id = act_id;
act_id = tcf_police_act_to_flow_act(p->tcfp_result,
- &entry->police.notexceed.extval);
+ &entry->police.notexceed.extval,
+ extack);
if (act_id < 0)
return act_id;
--
2.33.1
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