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authorBaowen Zheng <baowen.zheng@corigine.com>2021-12-17 21:16:22 +0300
committerDavid S. Miller <davem@davemloft.net>2021-12-19 17:08:48 +0300
commit8cbfe939abe905280279e84a297b1cb34e0d0ec9 (patch)
tree9c9e2dad06886bd0834d16071aa2faccdc20d99d /net/sched/act_api.c
parentc54e1d920f04d528ab558f09326a78d2ae59e323 (diff)
downloadlinux-8cbfe939abe905280279e84a297b1cb34e0d0ec9.tar.xz
flow_offload: allow user to offload tc action to net device
Use flow_indr_dev_register/flow_indr_dev_setup_offload to offload tc action. We need to call tc_cleanup_flow_action to clean up tc action entry since in tc_setup_action, some actions may hold dev refcnt, especially the mirror action. Signed-off-by: Baowen Zheng <baowen.zheng@corigine.com> Signed-off-by: Louis Peens <louis.peens@corigine.com> Signed-off-by: Simon Horman <simon.horman@corigine.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sched/act_api.c')
-rw-r--r--net/sched/act_api.c93
1 files changed, 93 insertions, 0 deletions
diff --git a/net/sched/act_api.c b/net/sched/act_api.c
index 3258da3d5bed..5c21401b0555 100644
--- a/net/sched/act_api.c
+++ b/net/sched/act_api.c
@@ -19,8 +19,10 @@
#include <net/sock.h>
#include <net/sch_generic.h>
#include <net/pkt_cls.h>
+#include <net/tc_act/tc_pedit.h>
#include <net/act_api.h>
#include <net/netlink.h>
+#include <net/flow_offload.h>
#ifdef CONFIG_INET
DEFINE_STATIC_KEY_FALSE(tcf_frag_xmit_count);
@@ -129,8 +131,92 @@ static void free_tcf(struct tc_action *p)
kfree(p);
}
+static unsigned int tcf_offload_act_num_actions_single(struct tc_action *act)
+{
+ if (is_tcf_pedit(act))
+ return tcf_pedit_nkeys(act);
+ else
+ return 1;
+}
+
+static int offload_action_init(struct flow_offload_action *fl_action,
+ struct tc_action *act,
+ enum offload_act_command cmd,
+ struct netlink_ext_ack *extack)
+{
+ fl_action->extack = extack;
+ fl_action->command = cmd;
+ fl_action->index = act->tcfa_index;
+
+ if (act->ops->offload_act_setup)
+ return act->ops->offload_act_setup(act, fl_action, NULL, false);
+
+ return -EOPNOTSUPP;
+}
+
+static int tcf_action_offload_cmd(struct flow_offload_action *fl_act,
+ struct netlink_ext_ack *extack)
+{
+ int err;
+
+ err = flow_indr_dev_setup_offload(NULL, NULL, TC_SETUP_ACT,
+ fl_act, NULL, NULL);
+ if (err < 0)
+ return err;
+
+ return 0;
+}
+
+/* offload the tc action after it is inserted */
+static int tcf_action_offload_add(struct tc_action *action,
+ struct netlink_ext_ack *extack)
+{
+ struct tc_action *actions[TCA_ACT_MAX_PRIO] = {
+ [0] = action,
+ };
+ struct flow_offload_action *fl_action;
+ int num, err = 0;
+
+ num = tcf_offload_act_num_actions_single(action);
+ fl_action = offload_action_alloc(num);
+ if (!fl_action)
+ return -ENOMEM;
+
+ err = offload_action_init(fl_action, action, FLOW_ACT_REPLACE, extack);
+ if (err)
+ goto fl_err;
+
+ err = tc_setup_action(&fl_action->action, actions);
+ if (err) {
+ NL_SET_ERR_MSG_MOD(extack,
+ "Failed to setup tc actions for offload\n");
+ goto fl_err;
+ }
+
+ err = tcf_action_offload_cmd(fl_action, extack);
+ tc_cleanup_offload_action(&fl_action->action);
+
+fl_err:
+ kfree(fl_action);
+
+ return err;
+}
+
+static int tcf_action_offload_del(struct tc_action *action)
+{
+ struct flow_offload_action fl_act = {};
+ int err = 0;
+
+ err = offload_action_init(&fl_act, action, FLOW_ACT_DESTROY, NULL);
+ if (err)
+ return err;
+
+ return tcf_action_offload_cmd(&fl_act, NULL);
+}
+
static void tcf_action_cleanup(struct tc_action *p)
{
+ tcf_action_offload_del(p);
if (p->ops->cleanup)
p->ops->cleanup(p);
@@ -1061,6 +1147,11 @@ err_out:
return ERR_PTR(err);
}
+static bool tc_act_bind(u32 flags)
+{
+ return !!(flags & TCA_ACT_FLAGS_BIND);
+}
+
/* Returns numbers of initialized actions or negative error. */
int tcf_action_init(struct net *net, struct tcf_proto *tp, struct nlattr *nla,
@@ -1103,6 +1194,8 @@ int tcf_action_init(struct net *net, struct tcf_proto *tp, struct nlattr *nla,
sz += tcf_action_fill_size(act);
/* Start from index 0 */
actions[i - 1] = act;
+ if (!tc_act_bind(flags))
+ tcf_action_offload_add(act, extack);
}
/* We have to commit them all together, because if any error happened in