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net/sched: avoid indirect classify functions on retpoline kernels 

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>
Reviewed-by: Victor Nogueira <victor@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Pedro Tammela 2022-12-06 10:55:13 -03:00 committed by David S. Miller
parent 871cf386dd
commit 9f3101dca3
14 changed files with 49 additions and 25 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
net/sched/cls_api.c
View File

@ -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 @@ reclassify:
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;

6
net/sched/cls_basic.c
View File

@ -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);

6
net/sched/cls_bpf.c
View File

@ -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);

6
net/sched/cls_cgroup.c
View File

@ -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);

6
net/sched/cls_flow.c
View File

@ -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;

6
net/sched/cls_flower.c
View File

@ -27,6 +27,7 @@
#include <net/vxlan.h>
#include <net/erspan.h>
#include <net/gtp.h>
#include <net/tc_wrapper.h>
#include <net/dst.h>
#include <net/dst_metadata.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;

6
net/sched/cls_fw.c
View File

@ -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;

6
net/sched/cls_matchall.c
View File

@ -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);

6
net/sched/cls_route.c
View File

@ -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;

2
net/sched/cls_rsvp.c
View File

@ -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");

6
net/sched/cls_rsvp.h
View File

@ -124,8 +124,8 @@ 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)
TC_INDIRECT_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 +738,7 @@ 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,

2
net/sched/cls_rsvp6.c
View File

@ -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");

7
net/sched/cls_tcindex.c
View File

@ -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;

6
net/sched/cls_u32.c
View File

@ -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;