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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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6
include/uapi/linux/rtnetlink.h
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@@ -609,11 +609,17 @@ enum {
TCA_HW_OFFLOAD,
TCA_INGRESS_BLOCK,
TCA_EGRESS_BLOCK,
TCA_DUMP_FLAGS,
__TCA_MAX
};
#define TCA_MAX (__TCA_MAX - 1)
#define TCA_DUMP_FLAGS_TERSE (1 << 0) /* Means that in dump user gets only basic
* data necessary to identify the objects
* (handle, cookie, etc.) and stats.
*/
#define TCA_RTA(r) ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct tcmsg))))
#define TCA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct tcmsg))