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net: sched: introduce terse dump flag

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Add new TCA_DUMP_FLAGS attribute and use it in cls API to request terse
filter output from classifiers with TCA_DUMP_FLAGS_TERSE flag. This option
is intended to be used to improve performance of TC filter dump when
userland only needs to obtain stats and not the whole classifier/action
data. Extend struct tcf_proto_ops with new terse_dump() callback that must
be defined by supporting classifier implementations.

Support of the options in specific classifiers and actions is
implemented in following patches in the series.

Signed-off-by: Vlad Buslov <vladbu@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Vlad Buslov
2020-05-15 14:40:11 +03:00
committed by David S. Miller
parent 2e186a2cf8
commit f8ab1807a9
3 changed files with 41 additions and 8 deletions
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4
include/net/sch_generic.h
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@@ -330,6 +330,10 @@ struct tcf_proto_ops {
int (*dump)(struct net*, struct tcf_proto*, void *,
struct sk_buff *skb, struct tcmsg*,
bool);
int (*terse_dump)(struct net *net,
struct tcf_proto *tp, void *fh,
struct sk_buff *skb,
struct tcmsg *t, bool rtnl_held);
int (*tmplt_dump)(struct sk_buff *skb,
struct net *net,
void *tmplt_priv);