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cls_api: add translator to flow_action representation

Browse source 
This patch implements a new function to translate from native TC action
to the new flow_action representation. Moreover, this patch also updates
cls_flower to use this new function.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Pablo Neira Ayuso 2019-02-02 12:50:46 +01:00 committed by David S. Miller
parent e3ab786b42
commit 3a7b68617d
3 changed files with 115 additions and 0 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

2
include/net/pkt_cls.h
View file

@ -620,6 +620,8 @@ tcf_match_indev(struct sk_buff *skb, int ifindex)
}
#endif /* CONFIG_NET_CLS_IND */
int tc_setup_flow_action(struct flow_action *flow_action,
const struct tcf_exts *exts);
int tc_setup_cb_call(struct tcf_block *block, enum tc_setup_type type,
void *type_data, bool err_stop);
unsigned int tcf_exts_num_actions(struct tcf_exts *exts);

99
net/sched/cls_api.c
View file

@ -32,6 +32,13 @@
#include <net/pkt_sched.h>
#include <net/pkt_cls.h>
#include <net/tc_act/tc_pedit.h>
#include <net/tc_act/tc_mirred.h>
#include <net/tc_act/tc_vlan.h>
#include <net/tc_act/tc_tunnel_key.h>
#include <net/tc_act/tc_csum.h>
#include <net/tc_act/tc_gact.h>
#include <net/tc_act/tc_skbedit.h>
#include <net/tc_act/tc_mirred.h>
extern const struct nla_policy rtm_tca_policy[TCA_MAX + 1];
@ -2516,6 +2523,98 @@ int tc_setup_cb_call(struct tcf_block *block, enum tc_setup_type type,
}
EXPORT_SYMBOL(tc_setup_cb_call);
int tc_setup_flow_action(struct flow_action *flow_action,
const struct tcf_exts *exts)
{
const struct tc_action *act;
int i, j, k;
if (!exts)
return 0;
j = 0;
tcf_exts_for_each_action(i, act, exts) {
struct flow_action_entry *entry;
entry = &flow_action->entries[j];
if (is_tcf_gact_ok(act)) {
entry->id = FLOW_ACTION_ACCEPT;
} else if (is_tcf_gact_shot(act)) {
entry->id = FLOW_ACTION_DROP;
} else if (is_tcf_gact_trap(act)) {
entry->id = FLOW_ACTION_TRAP;
} else if (is_tcf_gact_goto_chain(act)) {
entry->id = FLOW_ACTION_GOTO;
entry->chain_index = tcf_gact_goto_chain_index(act);
} else if (is_tcf_mirred_egress_redirect(act)) {
entry->id = FLOW_ACTION_REDIRECT;
entry->dev = tcf_mirred_dev(act);
} else if (is_tcf_mirred_egress_mirror(act)) {
entry->id = FLOW_ACTION_MIRRED;
entry->dev = tcf_mirred_dev(act);
} else if (is_tcf_vlan(act)) {
switch (tcf_vlan_action(act)) {
case TCA_VLAN_ACT_PUSH:
entry->id = FLOW_ACTION_VLAN_PUSH;
entry->vlan.vid = tcf_vlan_push_vid(act);
entry->vlan.proto = tcf_vlan_push_proto(act);
entry->vlan.prio = tcf_vlan_push_prio(act);
break;
case TCA_VLAN_ACT_POP:
entry->id = FLOW_ACTION_VLAN_POP;
break;
case TCA_VLAN_ACT_MODIFY:
entry->id = FLOW_ACTION_VLAN_MANGLE;
entry->vlan.vid = tcf_vlan_push_vid(act);
entry->vlan.proto = tcf_vlan_push_proto(act);
entry->vlan.prio = tcf_vlan_push_prio(act);
break;
default:
goto err_out;
}
} else if (is_tcf_tunnel_set(act)) {
entry->id = FLOW_ACTION_TUNNEL_ENCAP;
entry->tunnel = tcf_tunnel_info(act);
} else if (is_tcf_tunnel_release(act)) {
entry->id = FLOW_ACTION_TUNNEL_DECAP;
entry->tunnel = tcf_tunnel_info(act);
} else if (is_tcf_pedit(act)) {
for (k = 0; k < tcf_pedit_nkeys(act); k++) {
switch (tcf_pedit_cmd(act, k)) {
case TCA_PEDIT_KEY_EX_CMD_SET:
entry->id = FLOW_ACTION_MANGLE;
break;
case TCA_PEDIT_KEY_EX_CMD_ADD:
entry->id = FLOW_ACTION_ADD;
break;
default:
goto err_out;
}
entry->mangle.htype = tcf_pedit_htype(act, k);
entry->mangle.mask = tcf_pedit_mask(act, k);
entry->mangle.val = tcf_pedit_val(act, k);
entry->mangle.offset = tcf_pedit_offset(act, k);
entry = &flow_action->entries[++j];
}
} else if (is_tcf_csum(act)) {
entry->id = FLOW_ACTION_CSUM;
entry->csum_flags = tcf_csum_update_flags(act);
} else if (is_tcf_skbedit_mark(act)) {
entry->id = FLOW_ACTION_MARK;
entry->mark = tcf_skbedit_mark(act);
} else {
goto err_out;
}
if (!is_tcf_pedit(act))
j++;
}
return 0;
err_out:
return -EOPNOTSUPP;
}
EXPORT_SYMBOL(tc_setup_flow_action);
unsigned int tcf_exts_num_actions(struct tcf_exts *exts)
{
unsigned int num_acts = 0;

14
net/sched/cls_flower.c
View file

@ -394,6 +394,12 @@ static int fl_hw_replace_filter(struct tcf_proto *tp,
cls_flower.exts = &f->exts;
cls_flower.classid = f->res.classid;
err = tc_setup_flow_action(&cls_flower.rule->action, &f->exts);
if (err) {
kfree(cls_flower.rule);
return err;
}
err = tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, skip_sw);
kfree(cls_flower.rule);
@ -1483,6 +1489,14 @@ static int fl_reoffload(struct tcf_proto *tp, bool add, tc_setup_cb_t *cb,
cls_flower.rule->match.mask = &mask->key;
cls_flower.rule->match.key = &f->mkey;
cls_flower.exts = &f->exts;
err = tc_setup_flow_action(&cls_flower.rule->action,
&f->exts);
if (err) {
kfree(cls_flower.rule);
return err;
}
cls_flower.classid = f->res.classid;
err = cb(TC_SETUP_CLSFLOWER, &cls_flower, cb_priv);