From: Lorenz Bauer <lmb@cloudflare.com>
To: john.fastabend@gmail.com, Daniel Borkmann <daniel@iogearbox.net>,
Jakub Sitnicki <jakub@cloudflare.com>,
Lorenz Bauer <lmb@cloudflare.com>,
"David S. Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>,
Alexei Starovoitov <ast@kernel.org>
Cc: kernel-team@cloudflare.com, netdev@vger.kernel.org,
bpf@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH bpf-next v3 08/12] bpf: sockmap: add UDP support
Date: Wed, 4 Mar 2020 11:13:13 +0100 [thread overview]
Message-ID: <20200304101318.5225-9-lmb@cloudflare.com> (raw)
In-Reply-To: <20200304101318.5225-1-lmb@cloudflare.com>
Allow adding hashed UDP sockets to sockmaps.
Signed-off-by: Lorenz Bauer <lmb@cloudflare.com>
Signed-off-by: Jakub Sitnicki <jakub@cloudflare.com>
---
net/core/sock_map.c | 37 +++++++++++++++++++++++++++++++++----
1 file changed, 33 insertions(+), 4 deletions(-)
diff --git a/net/core/sock_map.c b/net/core/sock_map.c
index 83c5082cefd3..1485a8fd571c 100644
--- a/net/core/sock_map.c
+++ b/net/core/sock_map.c
@@ -11,6 +11,7 @@
#include <linux/list.h>
#include <linux/jhash.h>
#include <linux/sock_diag.h>
+#include <net/udp.h>
struct bpf_stab {
struct bpf_map map;
@@ -147,7 +148,19 @@ static int sock_map_init_proto(struct sock *sk, struct sk_psock *psock)
sock_owned_by_me(sk);
- prot = tcp_bpf_get_proto(sk, psock);
+ switch (sk->sk_type) {
+ case SOCK_STREAM:
+ prot = tcp_bpf_get_proto(sk, psock);
+ break;
+
+ case SOCK_DGRAM:
+ prot = udp_bpf_get_proto(sk, psock);
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
if (IS_ERR(prot))
return PTR_ERR(prot);
@@ -162,7 +175,7 @@ static struct sk_psock *sock_map_psock_get_checked(struct sock *sk)
rcu_read_lock();
psock = sk_psock(sk);
if (psock) {
- if (sk->sk_prot->recvmsg != tcp_bpf_recvmsg) {
+ if (sk->sk_prot->close != sock_map_close) {
psock = ERR_PTR(-EBUSY);
goto out;
}
@@ -474,15 +487,31 @@ static bool sock_map_op_okay(const struct bpf_sock_ops_kern *ops)
ops->op == BPF_SOCK_OPS_TCP_LISTEN_CB;
}
-static bool sock_map_sk_is_suitable(const struct sock *sk)
+static bool sk_is_tcp(const struct sock *sk)
{
return sk->sk_type == SOCK_STREAM &&
sk->sk_protocol == IPPROTO_TCP;
}
+static bool sk_is_udp(const struct sock *sk)
+{
+ return sk->sk_type == SOCK_DGRAM &&
+ sk->sk_protocol == IPPROTO_UDP;
+}
+
+static bool sock_map_sk_is_suitable(const struct sock *sk)
+{
+ return sk_is_tcp(sk) || sk_is_udp(sk);
+}
+
static bool sock_map_sk_state_allowed(const struct sock *sk)
{
- return (1 << sk->sk_state) & (TCPF_ESTABLISHED | TCPF_LISTEN);
+ if (sk_is_tcp(sk))
+ return (1 << sk->sk_state) & (TCPF_ESTABLISHED | TCPF_LISTEN);
+ else if (sk_is_udp(sk))
+ return sk_hashed(sk);
+
+ return false;
}
static int sock_map_update_elem(struct bpf_map *map, void *key,
--
2.20.1
next prev parent reply other threads:[~2020-03-04 10:14 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-04 10:13 [PATCH bpf-next v3 00/12] bpf: sockmap, sockhash: support storing UDP sockets Lorenz Bauer
2020-03-04 10:13 ` [PATCH bpf-next v3 01/12] bpf: sockmap: only check ULP for TCP sockets Lorenz Bauer
2020-03-05 12:00 ` Jakub Sitnicki
2020-03-06 14:56 ` John Fastabend
2020-03-04 10:13 ` [PATCH bpf-next v3 02/12] skmsg: update saved hooks only once Lorenz Bauer
2020-03-05 12:03 ` Jakub Sitnicki
2020-03-06 15:00 ` John Fastabend
2020-03-04 10:13 ` [PATCH bpf-next v3 03/12] bpf: tcp: move assertions into tcp_bpf_get_proto Lorenz Bauer
2020-03-05 12:10 ` Jakub Sitnicki
2020-03-06 15:25 ` John Fastabend
2020-03-04 10:13 ` [PATCH bpf-next v3 04/12] bpf: tcp: guard declarations with CONFIG_NET_SOCK_MSG Lorenz Bauer
2020-03-05 12:14 ` Jakub Sitnicki
2020-03-04 10:13 ` [PATCH bpf-next v3 05/12] bpf: sockmap: move generic sockmap hooks from BPF TCP Lorenz Bauer
2020-03-05 12:32 ` Jakub Sitnicki
2020-03-06 15:28 ` John Fastabend
2020-03-04 10:13 ` [PATCH bpf-next v3 06/12] bpf: sockmap: simplify sock_map_init_proto Lorenz Bauer
2020-03-05 12:39 ` Jakub Sitnicki
2020-03-06 15:29 ` John Fastabend
2020-03-04 10:13 ` [PATCH bpf-next v3 07/12] bpf: add sockmap hooks for UDP sockets Lorenz Bauer
2020-03-06 15:44 ` John Fastabend
2020-03-04 10:13 ` Lorenz Bauer [this message]
2020-03-06 15:31 ` [PATCH bpf-next v3 08/12] bpf: sockmap: add UDP support John Fastabend
2020-03-04 10:13 ` [PATCH bpf-next v3 09/12] selftests: bpf: don't listen() on UDP sockets Lorenz Bauer
2020-03-05 12:53 ` Jakub Sitnicki
2020-03-06 15:36 ` John Fastabend
2020-03-04 10:13 ` [PATCH bpf-next v3 10/12] selftests: bpf: add tests for UDP sockets in sockmap Lorenz Bauer
2020-03-06 15:38 ` John Fastabend
2020-03-04 10:13 ` [PATCH bpf-next v3 11/12] selftests: bpf: enable UDP sockmap reuseport tests Lorenz Bauer
2020-03-05 12:56 ` Jakub Sitnicki
2020-03-06 15:39 ` John Fastabend
2020-03-04 10:13 ` [PATCH bpf-next v3 12/12] bpf, doc: update maintainers for L7 BPF Lorenz Bauer
2020-03-05 12:58 ` Jakub Sitnicki
2020-03-05 12:59 ` [PATCH bpf-next v3 00/12] bpf: sockmap, sockhash: support storing UDP sockets Jakub Sitnicki
2020-03-06 15:45 ` John Fastabend
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