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Message-Id: <20211203122444.11756-7-simon.horman@corigine.com>
Date: Fri, 3 Dec 2021 13:24:38 +0100
From: Simon Horman <simon.horman@...igine.com>
To: netdev@...r.kernel.org
Cc: Cong Wang <xiyou.wangcong@...il.com>,
Ido Schimmel <idosch@...dia.com>,
Jamal Hadi Salim <jhs@...atatu.com>,
Jiri Pirko <jiri@...nulli.us>, Oz Shlomo <ozsh@...dia.com>,
Roi Dayan <roid@...dia.com>, Vlad Buslov <vladbu@...dia.com>,
Baowen Zheng <baowen.zheng@...igine.com>,
Louis Peens <louis.peens@...igine.com>,
oss-drivers@...igine.com, Simon Horman <simon.horman@...igine.com>
Subject: [PATCH v5 net-next 06/12] flow_offload: allow user to offload tc action to net device
From: Baowen Zheng <baowen.zheng@...igine.com>
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@...igine.com>
Signed-off-by: Louis Peens <louis.peens@...igine.com>
Signed-off-by: Simon Horman <simon.horman@...igine.com>
---
include/linux/netdevice.h | 1 +
include/net/flow_offload.h | 17 +++++++
include/net/pkt_cls.h | 6 +++
net/core/flow_offload.c | 42 +++++++++++++----
net/sched/act_api.c | 92 ++++++++++++++++++++++++++++++++++++++
net/sched/act_csum.c | 4 +-
net/sched/act_ct.c | 4 +-
net/sched/act_gact.c | 13 +++++-
net/sched/act_gate.c | 4 +-
net/sched/act_mirred.c | 13 +++++-
net/sched/act_mpls.c | 16 ++++++-
net/sched/act_police.c | 4 +-
net/sched/act_sample.c | 4 +-
net/sched/act_skbedit.c | 11 ++++-
net/sched/act_tunnel_key.c | 9 +++-
net/sched/act_vlan.c | 16 ++++++-
net/sched/cls_api.c | 21 +++++++--
17 files changed, 254 insertions(+), 23 deletions(-)
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 65117f01d5f2..037577cbe3f0 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -916,6 +916,7 @@ enum tc_setup_type {
TC_SETUP_QDISC_TBF,
TC_SETUP_QDISC_FIFO,
TC_SETUP_QDISC_HTB,
+ TC_SETUP_ACT,
};
/* These structures hold the attributes of bpf state that are being passed
diff --git a/include/net/flow_offload.h b/include/net/flow_offload.h
index f6970213497a..15662cad5bca 100644
--- a/include/net/flow_offload.h
+++ b/include/net/flow_offload.h
@@ -551,6 +551,23 @@ struct flow_cls_offload {
u32 classid;
};
+enum flow_act_command {
+ FLOW_ACT_REPLACE,
+ FLOW_ACT_DESTROY,
+ FLOW_ACT_STATS,
+};
+
+struct flow_offload_action {
+ struct netlink_ext_ack *extack; /* NULL in FLOW_ACT_STATS process*/
+ enum flow_act_command command;
+ enum flow_action_id id;
+ u32 index;
+ struct flow_stats stats;
+ struct flow_action action;
+};
+
+struct flow_offload_action *flow_action_alloc(unsigned int num_actions);
+
static inline struct flow_rule *
flow_cls_offload_flow_rule(struct flow_cls_offload *flow_cmd)
{
diff --git a/include/net/pkt_cls.h b/include/net/pkt_cls.h
index 193f88ebf629..13f0e4a3a136 100644
--- a/include/net/pkt_cls.h
+++ b/include/net/pkt_cls.h
@@ -258,6 +258,9 @@ static inline void tcf_exts_put_net(struct tcf_exts *exts)
for (; 0; (void)(i), (void)(a), (void)(exts))
#endif
+#define tcf_act_for_each_action(i, a, actions) \
+ for (i = 0; i < TCA_ACT_MAX_PRIO && ((a) = actions[i]); i++)
+
static inline void
tcf_exts_stats_update(const struct tcf_exts *exts,
u64 bytes, u64 packets, u64 drops, u64 lastuse,
@@ -534,6 +537,9 @@ tcf_match_indev(struct sk_buff *skb, int ifindex)
int tc_setup_flow_action(struct flow_action *flow_action,
const struct tcf_exts *exts);
+
+int tc_setup_action(struct flow_action *flow_action,
+ struct tc_action *actions[]);
void tc_cleanup_flow_action(struct flow_action *flow_action);
int tc_setup_cb_call(struct tcf_block *block, enum tc_setup_type type,
diff --git a/net/core/flow_offload.c b/net/core/flow_offload.c
index 6beaea13564a..31273a10086e 100644
--- a/net/core/flow_offload.c
+++ b/net/core/flow_offload.c
@@ -27,6 +27,26 @@ struct flow_rule *flow_rule_alloc(unsigned int num_actions)
}
EXPORT_SYMBOL(flow_rule_alloc);
+struct flow_offload_action *flow_action_alloc(unsigned int num_actions)
+{
+ struct flow_offload_action *fl_action;
+ int i;
+
+ fl_action = kzalloc(struct_size(fl_action, action.entries, num_actions),
+ GFP_KERNEL);
+ if (!fl_action)
+ return NULL;
+
+ fl_action->action.num_entries = num_actions;
+ /* Pre-fill each action hw_stats with DONT_CARE.
+ * Caller can override this if it wants stats for a given action.
+ */
+ for (i = 0; i < num_actions; i++)
+ fl_action->action.entries[i].hw_stats = FLOW_ACTION_HW_STATS_DONT_CARE;
+
+ return fl_action;
+}
+
#define FLOW_DISSECTOR_MATCH(__rule, __type, __out) \
const struct flow_match *__m = &(__rule)->match; \
struct flow_dissector *__d = (__m)->dissector; \
@@ -549,19 +569,25 @@ int flow_indr_dev_setup_offload(struct net_device *dev, struct Qdisc *sch,
void (*cleanup)(struct flow_block_cb *block_cb))
{
struct flow_indr_dev *this;
+ u32 count = 0;
+ int err;
mutex_lock(&flow_indr_block_lock);
+ if (bo) {
+ if (bo->command == FLOW_BLOCK_BIND)
+ indir_dev_add(data, dev, sch, type, cleanup, bo);
+ else if (bo->command == FLOW_BLOCK_UNBIND)
+ indir_dev_remove(data);
+ }
- if (bo->command == FLOW_BLOCK_BIND)
- indir_dev_add(data, dev, sch, type, cleanup, bo);
- else if (bo->command == FLOW_BLOCK_UNBIND)
- indir_dev_remove(data);
-
- list_for_each_entry(this, &flow_block_indr_dev_list, list)
- this->cb(dev, sch, this->cb_priv, type, bo, data, cleanup);
+ list_for_each_entry(this, &flow_block_indr_dev_list, list) {
+ err = this->cb(dev, sch, this->cb_priv, type, bo, data, cleanup);
+ if (!err)
+ count++;
+ }
mutex_unlock(&flow_indr_block_lock);
- return list_empty(&bo->cb_list) ? -EOPNOTSUPP : 0;
+ return (bo && list_empty(&bo->cb_list)) ? -EOPNOTSUPP : count;
}
EXPORT_SYMBOL(flow_indr_dev_setup_offload);
diff --git a/net/sched/act_api.c b/net/sched/act_api.c
index 3258da3d5bed..120e72d8502c 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 +131,91 @@ static void free_tcf(struct tc_action *p)
kfree(p);
}
+static unsigned int tcf_act_num_actions_single(struct tc_action *act)
+{
+ if (is_tcf_pedit(act))
+ return tcf_pedit_nkeys(act);
+ else
+ return 1;
+}
+
+static int flow_action_init(struct flow_offload_action *fl_action,
+ struct tc_action *act,
+ enum flow_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->flow_act_setup)
+ return act->ops->flow_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 command after 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 err = 0;
+
+ fl_action = flow_action_alloc(tcf_act_num_actions_single(action));
+ if (!fl_action)
+ return -ENOMEM;
+
+ err = flow_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_flow_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 = flow_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 +1146,11 @@ struct tc_action *tcf_action_init_1(struct net *net, struct tcf_proto *tp,
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 +1193,8 @@ 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
diff --git a/net/sched/act_csum.c b/net/sched/act_csum.c
index b55d687e3adc..26e9036240d9 100644
--- a/net/sched/act_csum.c
+++ b/net/sched/act_csum.c
@@ -705,7 +705,9 @@ static int tcf_csum_flow_act_setup(struct tc_action *act, void *entry_data,
entry->csum_flags = tcf_csum_update_flags(act);
*index_inc = 1;
} else {
- return -EOPNOTSUPP;
+ struct flow_offload_action *fl_action = entry_data;
+
+ fl_action->id = FLOW_ACTION_CSUM;
}
return 0;
diff --git a/net/sched/act_ct.c b/net/sched/act_ct.c
index 9edfed3b0f4b..485e4c7a086d 100644
--- a/net/sched/act_ct.c
+++ b/net/sched/act_ct.c
@@ -1505,7 +1505,9 @@ static int tcf_ct_flow_act_setup(struct tc_action *act, void *entry_data,
entry->ct.flow_table = tcf_ct_ft(act);
*index_inc = 1;
} else {
- return -EOPNOTSUPP;
+ struct flow_offload_action *fl_action = entry_data;
+
+ fl_action->id = FLOW_ACTION_CT;
}
return 0;
diff --git a/net/sched/act_gact.c b/net/sched/act_gact.c
index 2342aa5d8284..7d2f0c9587c8 100644
--- a/net/sched/act_gact.c
+++ b/net/sched/act_gact.c
@@ -272,7 +272,18 @@ static int tcf_gact_flow_act_setup(struct tc_action *act, void *entry_data,
}
*index_inc = 1;
} else {
- return -EOPNOTSUPP;
+ struct flow_offload_action *fl_action = entry_data;
+
+ if (is_tcf_gact_ok(act))
+ fl_action->id = FLOW_ACTION_ACCEPT;
+ else if (is_tcf_gact_shot(act))
+ fl_action->id = FLOW_ACTION_DROP;
+ else if (is_tcf_gact_trap(act))
+ fl_action->id = FLOW_ACTION_TRAP;
+ else if (is_tcf_gact_goto_chain(act))
+ fl_action->id = FLOW_ACTION_GOTO;
+ else
+ return -EOPNOTSUPP;
}
return 0;
diff --git a/net/sched/act_gate.c b/net/sched/act_gate.c
index cbdcbe4376bb..f149135c2e10 100644
--- a/net/sched/act_gate.c
+++ b/net/sched/act_gate.c
@@ -637,7 +637,9 @@ static int tcf_gate_flow_act_setup(struct tc_action *act, void *entry_data,
return err;
*index_inc = 1;
} else {
- return -EOPNOTSUPP;
+ struct flow_offload_action *fl_action = entry_data;
+
+ fl_action->id = FLOW_ACTION_GATE;
}
return 0;
diff --git a/net/sched/act_mirred.c b/net/sched/act_mirred.c
index 8c953b2dc2d5..7104dca72469 100644
--- a/net/sched/act_mirred.c
+++ b/net/sched/act_mirred.c
@@ -480,7 +480,18 @@ static int tcf_mirred_flow_act_setup(struct tc_action *act, void *entry_data,
}
*index_inc = 1;
} else {
- return -EOPNOTSUPP;
+ struct flow_offload_action *fl_action = entry_data;
+
+ if (is_tcf_mirred_egress_redirect(act))
+ fl_action->id = FLOW_ACTION_REDIRECT;
+ else if (is_tcf_mirred_egress_mirror(act))
+ fl_action->id = FLOW_ACTION_MIRRED;
+ else if (is_tcf_mirred_ingress_redirect(act))
+ fl_action->id = FLOW_ACTION_REDIRECT_INGRESS;
+ else if (is_tcf_mirred_ingress_mirror(act))
+ fl_action->id = FLOW_ACTION_MIRRED_INGRESS;
+ else
+ return -EOPNOTSUPP;
}
return 0;
diff --git a/net/sched/act_mpls.c b/net/sched/act_mpls.c
index 69bc9e10ee3e..720f57ec9a48 100644
--- a/net/sched/act_mpls.c
+++ b/net/sched/act_mpls.c
@@ -415,7 +415,21 @@ static int tcf_mpls_flow_act_setup(struct tc_action *act, void *entry_data,
}
*index_inc = 1;
} else {
- return -EOPNOTSUPP;
+ struct flow_offload_action *fl_action = entry_data;
+
+ switch (tcf_mpls_action(act)) {
+ case TCA_MPLS_ACT_PUSH:
+ fl_action->id = FLOW_ACTION_MPLS_PUSH;
+ break;
+ case TCA_MPLS_ACT_POP:
+ fl_action->id = FLOW_ACTION_MPLS_POP;
+ break;
+ case TCA_MPLS_ACT_MODIFY:
+ fl_action->id = FLOW_ACTION_MPLS_MANGLE;
+ break;
+ default:
+ return -EOPNOTSUPP;
+ }
}
return 0;
diff --git a/net/sched/act_police.c b/net/sched/act_police.c
index f48e9765b70e..b8b64c72d686 100644
--- a/net/sched/act_police.c
+++ b/net/sched/act_police.c
@@ -421,7 +421,9 @@ static int tcf_police_flow_act_setup(struct tc_action *act, void *entry_data,
entry->police.mtu = tcf_police_tcfp_mtu(act);
*index_inc = 1;
} else {
- return -EOPNOTSUPP;
+ struct flow_offload_action *fl_action = entry_data;
+
+ fl_action->id = FLOW_ACTION_POLICE;
}
return 0;
diff --git a/net/sched/act_sample.c b/net/sched/act_sample.c
index 1b0bb501218e..df7bfa688372 100644
--- a/net/sched/act_sample.c
+++ b/net/sched/act_sample.c
@@ -303,7 +303,9 @@ static int tcf_sample_flow_act_setup(struct tc_action *act, void *entry_data,
tcf_flow_sample_get_group(entry, act);
*index_inc = 1;
} else {
- return -EOPNOTSUPP;
+ struct flow_offload_action *fl_action = entry_data;
+
+ fl_action->id = FLOW_ACTION_SAMPLE;
}
return 0;
diff --git a/net/sched/act_skbedit.c b/net/sched/act_skbedit.c
index b0d791560aa6..c4fd5dc21bbc 100644
--- a/net/sched/act_skbedit.c
+++ b/net/sched/act_skbedit.c
@@ -347,7 +347,16 @@ static int tcf_skbedit_flow_act_setup(struct tc_action *act, void *entry_data,
}
*index_inc = 1;
} else {
- return -EOPNOTSUPP;
+ struct flow_offload_action *fl_action = entry_data;
+
+ if (is_tcf_skbedit_mark(act))
+ fl_action->id = FLOW_ACTION_MARK;
+ else if (is_tcf_skbedit_ptype(act))
+ fl_action->id = FLOW_ACTION_PTYPE;
+ else if (is_tcf_skbedit_priority(act))
+ fl_action->id = FLOW_ACTION_PRIORITY;
+ else
+ return -EOPNOTSUPP;
}
return 0;
diff --git a/net/sched/act_tunnel_key.c b/net/sched/act_tunnel_key.c
index 14d8307c31a5..2ebc797c047a 100644
--- a/net/sched/act_tunnel_key.c
+++ b/net/sched/act_tunnel_key.c
@@ -827,7 +827,14 @@ static int tcf_tunnel_key_flow_act_setup(struct tc_action *act,
}
*index_inc = 1;
} else {
- return -EOPNOTSUPP;
+ struct flow_offload_action *fl_action = entry_data;
+
+ if (is_tcf_tunnel_set(act))
+ fl_action->id = FLOW_ACTION_TUNNEL_ENCAP;
+ else if (is_tcf_tunnel_release(act))
+ fl_action->id = FLOW_ACTION_TUNNEL_DECAP;
+ else
+ return -EOPNOTSUPP;
}
return 0;
diff --git a/net/sched/act_vlan.c b/net/sched/act_vlan.c
index 5de24a995020..5f0ed3b5a5ac 100644
--- a/net/sched/act_vlan.c
+++ b/net/sched/act_vlan.c
@@ -395,7 +395,21 @@ static int tcf_vlan_flow_act_setup(struct tc_action *act, void *entry_data,
}
*index_inc = 1;
} else {
- return -EOPNOTSUPP;
+ struct flow_offload_action *fl_action = entry_data;
+
+ switch (tcf_vlan_action(act)) {
+ case TCA_VLAN_ACT_PUSH:
+ fl_action->id = FLOW_ACTION_VLAN_PUSH;
+ break;
+ case TCA_VLAN_ACT_POP:
+ fl_action->id = FLOW_ACTION_VLAN_POP;
+ break;
+ case TCA_VLAN_ACT_MODIFY:
+ fl_action->id = FLOW_ACTION_VLAN_MANGLE;
+ break;
+ default:
+ return -EOPNOTSUPP;
+ }
}
return 0;
diff --git a/net/sched/cls_api.c b/net/sched/cls_api.c
index 33b81c867ac0..2a1cc7fe2dd9 100644
--- a/net/sched/cls_api.c
+++ b/net/sched/cls_api.c
@@ -3488,8 +3488,8 @@ static int tc_setup_flow_act(struct tc_action *act,
#endif
}
-int tc_setup_flow_action(struct flow_action *flow_action,
- const struct tcf_exts *exts)
+int tc_setup_action(struct flow_action *flow_action,
+ struct tc_action *actions[])
{
int i, j, index, err = 0;
struct tc_action *act;
@@ -3498,11 +3498,11 @@ int tc_setup_flow_action(struct flow_action *flow_action,
BUILD_BUG_ON(TCA_ACT_HW_STATS_IMMEDIATE != FLOW_ACTION_HW_STATS_IMMEDIATE);
BUILD_BUG_ON(TCA_ACT_HW_STATS_DELAYED != FLOW_ACTION_HW_STATS_DELAYED);
- if (!exts)
+ if (!actions)
return 0;
j = 0;
- tcf_exts_for_each_action(i, act, exts) {
+ tcf_act_for_each_action(i, act, actions) {
struct flow_action_entry *entry;
entry = &flow_action->entries[j];
@@ -3531,6 +3531,19 @@ int tc_setup_flow_action(struct flow_action *flow_action,
spin_unlock_bh(&act->tcfa_lock);
goto err_out;
}
+
+int tc_setup_flow_action(struct flow_action *flow_action,
+ const struct tcf_exts *exts)
+{
+#ifdef CONFIG_NET_CLS_ACT
+ if (!exts)
+ return 0;
+
+ return tc_setup_action(flow_action, exts->actions);
+#else
+ return 0;
+#endif
+}
EXPORT_SYMBOL(tc_setup_flow_action);
unsigned int tcf_exts_num_actions(struct tcf_exts *exts)
--
2.20.1
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