net: sched: extend flow_action_entry with destructor
Generalize flow_action_entry cleanup by extending the structure with
pointer to destructor function. Set the destructor in
tc_setup_flow_action(). Refactor tc_cleanup_flow_action() to call
entry->destructor() instead of using switch that dispatches by entry->id
and manually executes cleanup.
This refactoring is necessary for following patches in this series that
require destructor to use tc_action->ops callbacks that can't be easily
obtained in tc_cleanup_flow_action().
Signed-off-by: Vlad Buslov <vladbu@mellanox.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/net/flow_offload.h b/include/net/flow_offload.h
index fc88187..86c567f 100644
--- a/include/net/flow_offload.h
+++ b/include/net/flow_offload.h
@@ -154,8 +154,12 @@ enum flow_action_mangle_base {
FLOW_ACT_MANGLE_HDR_TYPE_UDP,
};
+typedef void (*action_destr)(void *priv);
+
struct flow_action_entry {
enum flow_action_id id;
+ action_destr destructor;
+ void *destructor_priv;
union {
u32 chain_index; /* FLOW_ACTION_GOTO */
struct net_device *dev; /* FLOW_ACTION_REDIRECT */
@@ -170,7 +174,7 @@ struct flow_action_entry {
u32 mask;
u32 val;
} mangle;
- const struct ip_tunnel_info *tunnel; /* FLOW_ACTION_TUNNEL_ENCAP */
+ struct ip_tunnel_info *tunnel; /* FLOW_ACTION_TUNNEL_ENCAP */
u32 csum_flags; /* FLOW_ACTION_CSUM */
u32 mark; /* FLOW_ACTION_MARK */
u16 ptype; /* FLOW_ACTION_PTYPE */
diff --git a/net/sched/cls_api.c b/net/sched/cls_api.c
index 05c4fe1..c668195 100644
--- a/net/sched/cls_api.c
+++ b/net/sched/cls_api.c
@@ -3282,25 +3282,48 @@ void tc_cleanup_flow_action(struct flow_action *flow_action)
struct flow_action_entry *entry;
int i;
- flow_action_for_each(i, entry, flow_action) {
- switch (entry->id) {
- case FLOW_ACTION_REDIRECT:
- case FLOW_ACTION_MIRRED:
- case FLOW_ACTION_REDIRECT_INGRESS:
- case FLOW_ACTION_MIRRED_INGRESS:
- if (entry->dev)
- dev_put(entry->dev);
- break;
- case FLOW_ACTION_TUNNEL_ENCAP:
- kfree(entry->tunnel);
- break;
- default:
- break;
- }
- }
+ flow_action_for_each(i, entry, flow_action)
+ if (entry->destructor)
+ entry->destructor(entry->destructor_priv);
}
EXPORT_SYMBOL(tc_cleanup_flow_action);
+static void tcf_mirred_put_dev(void *priv)
+{
+ struct net_device *dev = priv;
+
+ dev_put(dev);
+}
+
+static void tcf_mirred_get_dev(struct flow_action_entry *entry,
+ const struct tc_action *act)
+{
+ entry->dev = tcf_mirred_dev(act);
+ if (!entry->dev)
+ return;
+ dev_hold(entry->dev);
+ entry->destructor = tcf_mirred_put_dev;
+ entry->destructor_priv = entry->dev;
+}
+
+static void tcf_tunnel_encap_put_tunnel(void *priv)
+{
+ struct ip_tunnel_info *tunnel = priv;
+
+ kfree(tunnel);
+}
+
+static int tcf_tunnel_encap_get_tunnel(struct flow_action_entry *entry,
+ const struct tc_action *act)
+{
+ entry->tunnel = tcf_tunnel_info_copy(act);
+ if (!entry->tunnel)
+ return -ENOMEM;
+ entry->destructor = tcf_tunnel_encap_put_tunnel;
+ entry->destructor_priv = entry->tunnel;
+ return 0;
+}
+
int tc_setup_flow_action(struct flow_action *flow_action,
const struct tcf_exts *exts, bool rtnl_held)
{
@@ -3329,24 +3352,16 @@ int tc_setup_flow_action(struct flow_action *flow_action,
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);
- if (entry->dev)
- dev_hold(entry->dev);
+ tcf_mirred_get_dev(entry, act);
} else if (is_tcf_mirred_egress_mirror(act)) {
entry->id = FLOW_ACTION_MIRRED;
- entry->dev = tcf_mirred_dev(act);
- if (entry->dev)
- dev_hold(entry->dev);
+ tcf_mirred_get_dev(entry, act);
} else if (is_tcf_mirred_ingress_redirect(act)) {
entry->id = FLOW_ACTION_REDIRECT_INGRESS;
- entry->dev = tcf_mirred_dev(act);
- if (entry->dev)
- dev_hold(entry->dev);
+ tcf_mirred_get_dev(entry, act);
} else if (is_tcf_mirred_ingress_mirror(act)) {
entry->id = FLOW_ACTION_MIRRED_INGRESS;
- entry->dev = tcf_mirred_dev(act);
- if (entry->dev)
- dev_hold(entry->dev);
+ tcf_mirred_get_dev(entry, act);
} else if (is_tcf_vlan(act)) {
switch (tcf_vlan_action(act)) {
case TCA_VLAN_ACT_PUSH:
@@ -3370,11 +3385,9 @@ int tc_setup_flow_action(struct flow_action *flow_action,
}
} else if (is_tcf_tunnel_set(act)) {
entry->id = FLOW_ACTION_TUNNEL_ENCAP;
- entry->tunnel = tcf_tunnel_info_copy(act);
- if (!entry->tunnel) {
- err = -ENOMEM;
+ err = tcf_tunnel_encap_get_tunnel(entry, act);
+ if (err)
goto err_out;
- }
} else if (is_tcf_tunnel_release(act)) {
entry->id = FLOW_ACTION_TUNNEL_DECAP;
} else if (is_tcf_pedit(act)) {
