diff mbox series

[bpf-next,v8,08/16] sock_map: kill sock_map_link_no_progs()

Message ID 20210331023237.41094-9-xiyou.wangcong@gmail.com (mailing list archive)
State Accepted
Delegated to: BPF
Headers show
Series sockmap: introduce BPF_SK_SKB_VERDICT and support UDP | expand

Checks

Context Check Description
netdev/cover_letter success Link
netdev/fixes_present success Link
netdev/patch_count fail Series longer than 15 patches
netdev/tree_selection success Clearly marked for bpf-next
netdev/subject_prefix success Link
netdev/cc_maintainers warning 8 maintainers not CCed: yhs@fb.com kpsingh@kernel.org andrii@kernel.org kafai@fb.com ast@kernel.org songliubraving@fb.com davem@davemloft.net kuba@kernel.org
netdev/source_inline success Was 0 now: 0
netdev/verify_signedoff success Link
netdev/module_param success Was 0 now: 0
netdev/build_32bit success Errors and warnings before: 1 this patch: 1
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/verify_fixes success Link
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 97 lines checked
netdev/build_allmodconfig_warn success Errors and warnings before: 1 this patch: 1
netdev/header_inline success Link

Commit Message

Cong Wang March 31, 2021, 2:32 a.m. UTC 
From: Cong Wang <cong.wang@bytedance.com>

Now we can fold sock_map_link_no_progs() into sock_map_link()
and get rid of sock_map_link_no_progs().

Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Jakub Sitnicki <jakub@cloudflare.com>
Cc: Lorenz Bauer <lmb@cloudflare.com>
Cc: John Fastabend <john.fastabend@gmail.com>
Signed-off-by: Cong Wang <cong.wang@bytedance.com>
---
 net/core/sock_map.c | 55 +++++++++++++--------------------------------
 1 file changed, 15 insertions(+), 40 deletions(-)
diff mbox series

Patch

diff --git a/net/core/sock_map.c b/net/core/sock_map.c
index d06face0f16c..42d797291d34 100644
--- a/net/core/sock_map.c
+++ b/net/core/sock_map.c
@@ -225,13 +225,24 @@  static struct sk_psock *sock_map_psock_get_checked(struct sock *sk)
 	return psock;
 }
 
+static bool sock_map_redirect_allowed(const struct sock *sk);
+
 static int sock_map_link(struct bpf_map *map, struct sock *sk)
 {
-	struct bpf_prog *msg_parser, *stream_parser, *stream_verdict;
 	struct sk_psock_progs *progs = sock_map_progs(map);
+	struct bpf_prog *stream_verdict = NULL;
+	struct bpf_prog *stream_parser = NULL;
+	struct bpf_prog *msg_parser = NULL;
 	struct sk_psock *psock;
 	int ret;
 
+	/* Only sockets we can redirect into/from in BPF need to hold
+	 * refs to parser/verdict progs and have their sk_data_ready
+	 * and sk_write_space callbacks overridden.
+	 */
+	if (!sock_map_redirect_allowed(sk))
+		goto no_progs;
+
 	stream_verdict = READ_ONCE(progs->stream_verdict);
 	if (stream_verdict) {
 		stream_verdict = bpf_prog_inc_not_zero(stream_verdict);
@@ -257,6 +268,7 @@  static int sock_map_link(struct bpf_map *map, struct sock *sk)
 		}
 	}
 
+no_progs:
 	psock = sock_map_psock_get_checked(sk);
 	if (IS_ERR(psock)) {
 		ret = PTR_ERR(psock);
@@ -316,27 +328,6 @@  static int sock_map_link(struct bpf_map *map, struct sock *sk)
 	return ret;
 }
 
-static int sock_map_link_no_progs(struct bpf_map *map, struct sock *sk)
-{
-	struct sk_psock *psock;
-	int ret;
-
-	psock = sock_map_psock_get_checked(sk);
-	if (IS_ERR(psock))
-		return PTR_ERR(psock);
-
-	if (!psock) {
-		psock = sk_psock_init(sk, map->numa_node);
-		if (IS_ERR(psock))
-			return PTR_ERR(psock);
-	}
-
-	ret = sock_map_init_proto(sk, psock);
-	if (ret < 0)
-		sk_psock_put(sk, psock);
-	return ret;
-}
-
 static void sock_map_free(struct bpf_map *map)
 {
 	struct bpf_stab *stab = container_of(map, struct bpf_stab, map);
@@ -467,8 +458,6 @@  static int sock_map_get_next_key(struct bpf_map *map, void *key, void *next)
 	return 0;
 }
 
-static bool sock_map_redirect_allowed(const struct sock *sk);
-
 static int sock_map_update_common(struct bpf_map *map, u32 idx,
 				  struct sock *sk, u64 flags)
 {
@@ -488,14 +477,7 @@  static int sock_map_update_common(struct bpf_map *map, u32 idx,
 	if (!link)
 		return -ENOMEM;
 
-	/* Only sockets we can redirect into/from in BPF need to hold
-	 * refs to parser/verdict progs and have their sk_data_ready
-	 * and sk_write_space callbacks overridden.
-	 */
-	if (sock_map_redirect_allowed(sk))
-		ret = sock_map_link(map, sk);
-	else
-		ret = sock_map_link_no_progs(map, sk);
+	ret = sock_map_link(map, sk);
 	if (ret < 0)
 		goto out_free;
 
@@ -1000,14 +982,7 @@  static int sock_hash_update_common(struct bpf_map *map, void *key,
 	if (!link)
 		return -ENOMEM;
 
-	/* Only sockets we can redirect into/from in BPF need to hold
-	 * refs to parser/verdict progs and have their sk_data_ready
-	 * and sk_write_space callbacks overridden.
-	 */
-	if (sock_map_redirect_allowed(sk))
-		ret = sock_map_link(map, sk);
-	else
-		ret = sock_map_link_no_progs(map, sk);
+	ret = sock_map_link(map, sk);
 	if (ret < 0)
 		goto out_free;