netdev - [Patch bpf-next v7 6/9] sock_map: make sock_map_prog

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Date:   Tue, 23 Feb 2021 10:49:31 -0800
From:   Cong Wang <xiyou.wangcong@...il.com>
To:     netdev@...r.kernel.org
Cc:     bpf@...r.kernel.org, duanxiongchun@...edance.com,
        wangdongdong.6@...edance.com, jiang.wang@...edance.com,
        Cong Wang <cong.wang@...edance.com>,
        Jakub Sitnicki <jakub@...udflare.com>,
        Daniel Borkmann <daniel@...earbox.net>,
        Lorenz Bauer <lmb@...udflare.com>,
        John Fastabend <john.fastabend@...il.com>
Subject: [Patch bpf-next v7 6/9] sock_map: make sock_map_prog_update() static

From: Cong Wang <cong.wang@...edance.com>

It is only used within sock_map.c so can become static.

Suggested-by: Jakub Sitnicki <jakub@...udflare.com>
Cc: Daniel Borkmann <daniel@...earbox.net>
Cc: Lorenz Bauer <lmb@...udflare.com>
Cc: John Fastabend <john.fastabend@...il.com>
Acked-by: Jakub Sitnicki <jakub@...udflare.com>
Signed-off-by: Cong Wang <cong.wang@...edance.com>
---
 include/linux/bpf.h | 9 ---------
 net/core/sock_map.c | 7 +++++--
 2 files changed, 5 insertions(+), 11 deletions(-)

diff --git a/include/linux/bpf.h b/include/linux/bpf.h
index 813f30ef44ff..521b75a81aa6 100644
--- a/include/linux/bpf.h
+++ b/include/linux/bpf.h
@@ -1769,8 +1769,6 @@ static inline void bpf_map_offload_map_free(struct bpf_map *map)
 #endif /* CONFIG_NET && CONFIG_BPF_SYSCALL */
 
 #if defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL)
-int sock_map_prog_update(struct bpf_map *map, struct bpf_prog *prog,
-			 struct bpf_prog *old, u32 which);
 int sock_map_get_from_fd(const union bpf_attr *attr, struct bpf_prog *prog);
 int sock_map_prog_detach(const union bpf_attr *attr, enum bpf_prog_type ptype);
 int sock_map_update_elem_sys(struct bpf_map *map, void *key, void *value, u64 flags);
@@ -1788,13 +1786,6 @@ static inline void bpf_sk_reuseport_detach(struct sock *sk)
 }
 
 #ifdef CONFIG_BPF_SYSCALL
-static inline int sock_map_prog_update(struct bpf_map *map,
-				       struct bpf_prog *prog,
-				       struct bpf_prog *old, u32 which)
-{
-	return -EOPNOTSUPP;
-}
-
 static inline int sock_map_get_from_fd(const union bpf_attr *attr,
 				       struct bpf_prog *prog)
 {
diff --git a/net/core/sock_map.c b/net/core/sock_map.c
index 69785070f02d..dd53a7771d7e 100644
--- a/net/core/sock_map.c
+++ b/net/core/sock_map.c
@@ -24,6 +24,9 @@ struct bpf_stab {
 #define SOCK_CREATE_FLAG_MASK				\
 	(BPF_F_NUMA_NODE | BPF_F_RDONLY | BPF_F_WRONLY)
 
+static int sock_map_prog_update(struct bpf_map *map, struct bpf_prog *prog,
+				struct bpf_prog *old, u32 which);
+
 static struct bpf_map *sock_map_alloc(union bpf_attr *attr)
 {
 	struct bpf_stab *stab;
@@ -1444,8 +1447,8 @@ static struct sk_psock_progs *sock_map_progs(struct bpf_map *map)
 	return NULL;
 }
 
-int sock_map_prog_update(struct bpf_map *map, struct bpf_prog *prog,
-			 struct bpf_prog *old, u32 which)
+static int sock_map_prog_update(struct bpf_map *map, struct bpf_prog *prog,
+				struct bpf_prog *old, u32 which)
 {
 	struct sk_psock_progs *progs = sock_map_progs(map);
 	struct bpf_prog **pprog;
-- 
2.25.1