diff mbox series

[RFC,net-next,3/3] net/sched: avoid indirect classify functions on retpoline kernels

Message ID 20221125175207.473866-4-pctammela@mojatatu.com (mailing list archive)
State Superseded
Delegated to: Netdev Maintainers
Headers show
Series net/sched: retpoline wrappers for tc | expand

Checks

Context Check Description
netdev/tree_selection success Clearly marked for net-next, async
netdev/fixes_present success Fixes tag not required for -next series
netdev/subject_prefix success Link
netdev/cover_letter success Series has a cover letter
netdev/patch_count success Link
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit fail Errors and warnings before: 14 this patch: 17
netdev/cc_maintainers warning 12 maintainers not CCed: sdf@google.com martin.lau@linux.dev ast@kernel.org kpsingh@kernel.org bpf@vger.kernel.org andrii@kernel.org haoluo@google.com daniel@iogearbox.net jolsa@kernel.org song@kernel.org john.fastabend@gmail.com yhs@fb.com
netdev/build_clang fail Errors and warnings before: 7 this patch: 10
netdev/module_param success Was 0 now: 0
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn fail Errors and warnings before: 14 this patch: 17
netdev/checkpatch warning WARNING: From:/Signed-off-by: email address mismatch: 'From: Pedro Tammela <pctammela@gmail.com>' != 'Signed-off-by: Pedro Tammela <pctammela@mojatatu.com>'
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0

Commit Message

Pedro Tammela Nov. 25, 2022, 5:52 p.m. UTC 
Expose the necessary tc classifier functions and wire up cls_api to use
direct calls in retpoline kernels.

Signed-off-by: Pedro Tammela <pctammela@mojatatu.com>
Reviewed-by: Jamal Hadi Salim <jhs@mojatatu.com>
---
 net/sched/cls_api.c      | 3 ++-
 net/sched/cls_basic.c    | 6 ++++--
 net/sched/cls_bpf.c      | 6 ++++--
 net/sched/cls_cgroup.c   | 6 ++++--
 net/sched/cls_flow.c     | 6 ++++--
 net/sched/cls_flower.c   | 6 ++++--
 net/sched/cls_fw.c       | 6 ++++--
 net/sched/cls_matchall.c | 6 ++++--
 net/sched/cls_route.c    | 6 ++++--
 net/sched/cls_rsvp.c     | 2 ++
 net/sched/cls_rsvp.h     | 7 ++++---
 net/sched/cls_rsvp6.c    | 2 ++
 net/sched/cls_tcindex.c  | 7 ++++---
 net/sched/cls_u32.c      | 6 ++++--
 14 files changed, 50 insertions(+), 25 deletions(-)
diff mbox series

Patch

diff --git a/net/sched/cls_api.c b/net/sched/cls_api.c
index 23d1cfa4f58c..3f86616f1abb 100644
--- a/net/sched/cls_api.c
+++ b/net/sched/cls_api.c
@@ -40,6 +40,7 @@ 
 #include <net/tc_act/tc_mpls.h>
 #include <net/tc_act/tc_gate.h>
 #include <net/flow_offload.h>
+#include <net/tc_wrapper.h>
 
 extern const struct nla_policy rtm_tca_policy[TCA_MAX + 1];
 
@@ -1564,7 +1565,7 @@  static inline int __tcf_classify(struct sk_buff *skb,
 		    tp->protocol != htons(ETH_P_ALL))
 			continue;
 
-		err = tp->classify(skb, tp, res);
+		err = __tc_classify(skb, tp, res);
 #ifdef CONFIG_NET_CLS_ACT
 		if (unlikely(err == TC_ACT_RECLASSIFY && !compat_mode)) {
 			first_tp = orig_tp;
diff --git a/net/sched/cls_basic.c b/net/sched/cls_basic.c
index d229ce99e554..1b92c33b5f81 100644
--- a/net/sched/cls_basic.c
+++ b/net/sched/cls_basic.c
@@ -18,6 +18,7 @@ 
 #include <net/netlink.h>
 #include <net/act_api.h>
 #include <net/pkt_cls.h>
+#include <net/tc_wrapper.h>
 
 struct basic_head {
 	struct list_head	flist;
@@ -36,8 +37,9 @@  struct basic_filter {
 	struct rcu_work		rwork;
 };
 
-static int basic_classify(struct sk_buff *skb, const struct tcf_proto *tp,
-			  struct tcf_result *res)
+TC_INDIRECT_SCOPE int basic_classify(struct sk_buff *skb,
+				     const struct tcf_proto *tp,
+				     struct tcf_result *res)
 {
 	int r;
 	struct basic_head *head = rcu_dereference_bh(tp->root);
diff --git a/net/sched/cls_bpf.c b/net/sched/cls_bpf.c
index bc317b3eac12..466c26df853a 100644
--- a/net/sched/cls_bpf.c
+++ b/net/sched/cls_bpf.c
@@ -19,6 +19,7 @@ 
 #include <net/rtnetlink.h>
 #include <net/pkt_cls.h>
 #include <net/sock.h>
+#include <net/tc_wrapper.h>
 
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Daniel Borkmann <dborkman@redhat.com>");
@@ -77,8 +78,9 @@  static int cls_bpf_exec_opcode(int code)
 	}
 }
 
-static int cls_bpf_classify(struct sk_buff *skb, const struct tcf_proto *tp,
-			    struct tcf_result *res)
+TC_INDIRECT_SCOPE int cls_bpf_classify(struct sk_buff *skb,
+				       const struct tcf_proto *tp,
+				       struct tcf_result *res)
 {
 	struct cls_bpf_head *head = rcu_dereference_bh(tp->root);
 	bool at_ingress = skb_at_tc_ingress(skb);
diff --git a/net/sched/cls_cgroup.c b/net/sched/cls_cgroup.c
index ed00001b528a..bd9322d71910 100644
--- a/net/sched/cls_cgroup.c
+++ b/net/sched/cls_cgroup.c
@@ -13,6 +13,7 @@ 
 #include <net/pkt_cls.h>
 #include <net/sock.h>
 #include <net/cls_cgroup.h>
+#include <net/tc_wrapper.h>
 
 struct cls_cgroup_head {
 	u32			handle;
@@ -22,8 +23,9 @@  struct cls_cgroup_head {
 	struct rcu_work		rwork;
 };
 
-static int cls_cgroup_classify(struct sk_buff *skb, const struct tcf_proto *tp,
-			       struct tcf_result *res)
+TC_INDIRECT_SCOPE int cls_cgroup_classify(struct sk_buff *skb,
+					  const struct tcf_proto *tp,
+					  struct tcf_result *res)
 {
 	struct cls_cgroup_head *head = rcu_dereference_bh(tp->root);
 	u32 classid = task_get_classid(skb);
diff --git a/net/sched/cls_flow.c b/net/sched/cls_flow.c
index 014cd3de7b5d..535668e1f748 100644
--- a/net/sched/cls_flow.c
+++ b/net/sched/cls_flow.c
@@ -24,6 +24,7 @@ 
 #include <net/ip.h>
 #include <net/route.h>
 #include <net/flow_dissector.h>
+#include <net/tc_wrapper.h>
 
 #if IS_ENABLED(CONFIG_NF_CONNTRACK)
 #include <net/netfilter/nf_conntrack.h>
@@ -292,8 +293,9 @@  static u32 flow_key_get(struct sk_buff *skb, int key, struct flow_keys *flow)
 			  (1 << FLOW_KEY_NFCT_PROTO_SRC) |	\
 			  (1 << FLOW_KEY_NFCT_PROTO_DST))
 
-static int flow_classify(struct sk_buff *skb, const struct tcf_proto *tp,
-			 struct tcf_result *res)
+TC_INDIRECT_SCOPE int flow_classify(struct sk_buff *skb,
+				    const struct tcf_proto *tp,
+				    struct tcf_result *res)
 {
 	struct flow_head *head = rcu_dereference_bh(tp->root);
 	struct flow_filter *f;
diff --git a/net/sched/cls_flower.c b/net/sched/cls_flower.c
index 25bc57ee6ea1..3fb0b78503d5 100644
--- a/net/sched/cls_flower.c
+++ b/net/sched/cls_flower.c
@@ -5,6 +5,7 @@ 
  * Copyright (c) 2015 Jiri Pirko <jiri@resnulli.us>
  */
 
+#include <linux/indirect_call_wrapper.h>
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/module.h>
@@ -305,8 +306,9 @@  static u16 fl_ct_info_to_flower_map[] = {
 					TCA_FLOWER_KEY_CT_FLAGS_NEW,
 };
 
-static int fl_classify(struct sk_buff *skb, const struct tcf_proto *tp,
-		       struct tcf_result *res)
+TC_INDIRECT_SCOPE int fl_classify(struct sk_buff *skb,
+				  const struct tcf_proto *tp,
+				  struct tcf_result *res)
 {
 	struct cls_fl_head *head = rcu_dereference_bh(tp->root);
 	bool post_ct = tc_skb_cb(skb)->post_ct;
diff --git a/net/sched/cls_fw.c b/net/sched/cls_fw.c
index a32351da968c..ae9439a6c56c 100644
--- a/net/sched/cls_fw.c
+++ b/net/sched/cls_fw.c
@@ -21,6 +21,7 @@ 
 #include <net/act_api.h>
 #include <net/pkt_cls.h>
 #include <net/sch_generic.h>
+#include <net/tc_wrapper.h>
 
 #define HTSIZE 256
 
@@ -47,8 +48,9 @@  static u32 fw_hash(u32 handle)
 	return handle % HTSIZE;
 }
 
-static int fw_classify(struct sk_buff *skb, const struct tcf_proto *tp,
-		       struct tcf_result *res)
+TC_INDIRECT_SCOPE int fw_classify(struct sk_buff *skb,
+				  const struct tcf_proto *tp,
+				  struct tcf_result *res)
 {
 	struct fw_head *head = rcu_dereference_bh(tp->root);
 	struct fw_filter *f;
diff --git a/net/sched/cls_matchall.c b/net/sched/cls_matchall.c
index 39a5d9c170de..705f63da2c21 100644
--- a/net/sched/cls_matchall.c
+++ b/net/sched/cls_matchall.c
@@ -12,6 +12,7 @@ 
 
 #include <net/sch_generic.h>
 #include <net/pkt_cls.h>
+#include <net/tc_wrapper.h>
 
 struct cls_mall_head {
 	struct tcf_exts exts;
@@ -24,8 +25,9 @@  struct cls_mall_head {
 	bool deleting;
 };
 
-static int mall_classify(struct sk_buff *skb, const struct tcf_proto *tp,
-			 struct tcf_result *res)
+TC_INDIRECT_SCOPE int mall_classify(struct sk_buff *skb,
+				    const struct tcf_proto *tp,
+				    struct tcf_result *res)
 {
 	struct cls_mall_head *head = rcu_dereference_bh(tp->root);
 
diff --git a/net/sched/cls_route.c b/net/sched/cls_route.c
index 9e43b929d4ca..d0c53724d3e8 100644
--- a/net/sched/cls_route.c
+++ b/net/sched/cls_route.c
@@ -17,6 +17,7 @@ 
 #include <net/netlink.h>
 #include <net/act_api.h>
 #include <net/pkt_cls.h>
+#include <net/tc_wrapper.h>
 
 /*
  * 1. For now we assume that route tags < 256.
@@ -121,8 +122,9 @@  static inline int route4_hash_wild(void)
 	return 0;						\
 }
 
-static int route4_classify(struct sk_buff *skb, const struct tcf_proto *tp,
-			   struct tcf_result *res)
+TC_INDIRECT_SCOPE int route4_classify(struct sk_buff *skb,
+				      const struct tcf_proto *tp,
+				      struct tcf_result *res)
 {
 	struct route4_head *head = rcu_dereference_bh(tp->root);
 	struct dst_entry *dst;
diff --git a/net/sched/cls_rsvp.c b/net/sched/cls_rsvp.c
index de1c1d4da597..03d8619bd9c6 100644
--- a/net/sched/cls_rsvp.c
+++ b/net/sched/cls_rsvp.c
@@ -15,10 +15,12 @@ 
 #include <net/netlink.h>
 #include <net/act_api.h>
 #include <net/pkt_cls.h>
+#include <net/tc_wrapper.h>
 
 #define RSVP_DST_LEN	1
 #define RSVP_ID		"rsvp"
 #define RSVP_OPS	cls_rsvp_ops
+#define RSVP_CLS	rsvp_classify
 
 #include "cls_rsvp.h"
 MODULE_LICENSE("GPL");
diff --git a/net/sched/cls_rsvp.h b/net/sched/cls_rsvp.h
index b00a7dbd0587..e8c0973e5f2b 100644
--- a/net/sched/cls_rsvp.h
+++ b/net/sched/cls_rsvp.h
@@ -124,8 +124,9 @@  static inline unsigned int hash_src(__be32 *src)
 		return r;				\
 }
 
-static int rsvp_classify(struct sk_buff *skb, const struct tcf_proto *tp,
-			 struct tcf_result *res)
+INDIRECT_CALLABLE_SCOPE int RSVP_CLS(struct sk_buff *skb,
+				     const struct tcf_proto *tp,
+				     struct tcf_result *res)
 {
 	struct rsvp_head *head = rcu_dereference_bh(tp->root);
 	struct rsvp_session *s;
@@ -738,7 +739,7 @@  static void rsvp_bind_class(void *fh, u32 classid, unsigned long cl, void *q,
 
 static struct tcf_proto_ops RSVP_OPS __read_mostly = {
 	.kind		=	RSVP_ID,
-	.classify	=	rsvp_classify,
+	.classify	=	RSVP_CLS,
 	.init		=	rsvp_init,
 	.destroy	=	rsvp_destroy,
 	.get		=	rsvp_get,
diff --git a/net/sched/cls_rsvp6.c b/net/sched/cls_rsvp6.c
index 64078846000e..e627cc32d633 100644
--- a/net/sched/cls_rsvp6.c
+++ b/net/sched/cls_rsvp6.c
@@ -15,10 +15,12 @@ 
 #include <net/act_api.h>
 #include <net/pkt_cls.h>
 #include <net/netlink.h>
+#include <net/tc_wrapper.h>
 
 #define RSVP_DST_LEN	4
 #define RSVP_ID		"rsvp6"
 #define RSVP_OPS	cls_rsvp6_ops
+#define RSVP_CLS rsvp6_classify
 
 #include "cls_rsvp.h"
 MODULE_LICENSE("GPL");
diff --git a/net/sched/cls_tcindex.c b/net/sched/cls_tcindex.c
index 1c9eeb98d826..eb0e9458e722 100644
--- a/net/sched/cls_tcindex.c
+++ b/net/sched/cls_tcindex.c
@@ -16,6 +16,7 @@ 
 #include <net/netlink.h>
 #include <net/pkt_cls.h>
 #include <net/sch_generic.h>
+#include <net/tc_wrapper.h>
 
 /*
  * Passing parameters to the root seems to be done more awkwardly than really
@@ -98,9 +99,9 @@  static struct tcindex_filter_result *tcindex_lookup(struct tcindex_data *p,
 	return NULL;
 }
 
-
-static int tcindex_classify(struct sk_buff *skb, const struct tcf_proto *tp,
-			    struct tcf_result *res)
+TC_INDIRECT_SCOPE int tcindex_classify(struct sk_buff *skb,
+				       const struct tcf_proto *tp,
+				       struct tcf_result *res)
 {
 	struct tcindex_data *p = rcu_dereference_bh(tp->root);
 	struct tcindex_filter_result *f;
diff --git a/net/sched/cls_u32.c b/net/sched/cls_u32.c
index 34d25f7a0687..4e2e269f121f 100644
--- a/net/sched/cls_u32.c
+++ b/net/sched/cls_u32.c
@@ -39,6 +39,7 @@ 
 #include <net/act_api.h>
 #include <net/pkt_cls.h>
 #include <linux/idr.h>
+#include <net/tc_wrapper.h>
 
 struct tc_u_knode {
 	struct tc_u_knode __rcu	*next;
@@ -100,8 +101,9 @@  static inline unsigned int u32_hash_fold(__be32 key,
 	return h;
 }
 
-static int u32_classify(struct sk_buff *skb, const struct tcf_proto *tp,
-			struct tcf_result *res)
+TC_INDIRECT_SCOPE int u32_classify(struct sk_buff *skb,
+				   const struct tcf_proto *tp,
+				   struct tcf_result *res)
 {
 	struct {
 		struct tc_u_knode *knode;