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net: sched: implement terse dump support in act

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Extend tcf_action_dump() with boolean argument 'terse' that is used to
request terse-mode action dump. In terse mode only essential data needed to
identify particular action (action kind, cookie, etc.) and its stats is put
to resulting skb and everything else is omitted. Implement
tcf_exts_terse_dump() helper in cls API that is intended to be used to
request terse dump of all exts (actions) attached to the filter.

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 14:40:12 +03:00
committed by David S. Miller
parent f8ab1807a9
commit ca44b738e5
4 changed files with 52 additions and 9 deletions
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28
net/sched/cls_api.c
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@@ -3179,7 +3179,8 @@ int tcf_exts_dump(struct sk_buff *skb, struct tcf_exts *exts)
if (nest == NULL)
goto nla_put_failure;
if (tcf_action_dump(skb, exts->actions, 0, 0) < 0)
if (tcf_action_dump(skb, exts->actions, 0, 0, false)
< 0)
goto nla_put_failure;
nla_nest_end(skb, nest);
} else if (exts->police) {
@@ -3203,6 +3204,31 @@ nla_put_failure:
}
EXPORT_SYMBOL(tcf_exts_dump);
int tcf_exts_terse_dump(struct sk_buff *skb, struct tcf_exts *exts)
{
#ifdef CONFIG_NET_CLS_ACT
struct nlattr *nest;
if (!exts->action || !tcf_exts_has_actions(exts))
return 0;
nest = nla_nest_start_noflag(skb, exts->action);
if (!nest)
goto nla_put_failure;
if (tcf_action_dump(skb, exts->actions, 0, 0, true) < 0)
goto nla_put_failure;
nla_nest_end(skb, nest);
return 0;
nla_put_failure:
nla_nest_cancel(skb, nest);
return -1;
#else
return 0;
#endif
}
EXPORT_SYMBOL(tcf_exts_terse_dump);
int tcf_exts_dump_stats(struct sk_buff *skb, struct tcf_exts *exts)
{