From: Xin Long <lucien.xin@gmail.com>
To: network dev <netdev@vger.kernel.org>
Cc: davem@davemloft.net, Jakub Kicinski <kuba@kernel.org>,
pabeni@redhat.com, Willem de Bruijn <willemb@google.com>,
Martin Varghese <martin.varghese@nokia.com>,
Alexander Duyck <alexander.duyck@gmail.com>,
David Howells <dhowells@redhat.com>
Subject: [PATCHv3 net-next] udp: call udp_encap_enable for v6 sockets when enabling encap
Date: Sun, 24 Jan 2021 16:53:23 +0800 [thread overview]
Message-ID: <d2a9b26103c84ff535a886e875c6c619057641c8.1611478403.git.lucien.xin@gmail.com> (raw)
When enabling encap for a ipv6 socket without udp_encap_needed_key
increased, UDP GRO won't work for v4 mapped v6 address packets as
sk will be NULL in udp4_gro_receive().
This patch is to enable it by increasing udp_encap_needed_key for
v6 sockets in udp_tunnel_encap_enable(), and correspondingly
decrease udp_encap_needed_key in udpv6_destroy_sock().
v1->v2:
- add udp_encap_disable() and export it.
v2->v3:
- add the change for rxrpc and bareudp into one patch, as Alex
suggested.
Signed-off-by: Xin Long <lucien.xin@gmail.com>
---
drivers/net/bareudp.c | 6 ------
include/net/udp.h | 1 +
include/net/udp_tunnel.h | 3 +--
net/ipv4/udp.c | 6 ++++++
net/ipv6/udp.c | 4 +++-
net/rxrpc/local_object.c | 4 +++-
6 files changed, 14 insertions(+), 10 deletions(-)
diff --git a/drivers/net/bareudp.c b/drivers/net/bareudp.c
index 1b8f597..7511bca 100644
--- a/drivers/net/bareudp.c
+++ b/drivers/net/bareudp.c
@@ -240,12 +240,6 @@ static int bareudp_socket_create(struct bareudp_dev *bareudp, __be16 port)
tunnel_cfg.encap_destroy = NULL;
setup_udp_tunnel_sock(bareudp->net, sock, &tunnel_cfg);
- /* As the setup_udp_tunnel_sock does not call udp_encap_enable if the
- * socket type is v6 an explicit call to udp_encap_enable is needed.
- */
- if (sock->sk->sk_family == AF_INET6)
- udp_encap_enable();
-
rcu_assign_pointer(bareudp->sock, sock);
return 0;
}
diff --git a/include/net/udp.h b/include/net/udp.h
index 877832b..1e7b6cd 100644
--- a/include/net/udp.h
+++ b/include/net/udp.h
@@ -467,6 +467,7 @@ void udp_init(void);
DECLARE_STATIC_KEY_FALSE(udp_encap_needed_key);
void udp_encap_enable(void);
+void udp_encap_disable(void);
#if IS_ENABLED(CONFIG_IPV6)
DECLARE_STATIC_KEY_FALSE(udpv6_encap_needed_key);
void udpv6_encap_enable(void);
diff --git a/include/net/udp_tunnel.h b/include/net/udp_tunnel.h
index 282d10e..afc7ce7 100644
--- a/include/net/udp_tunnel.h
+++ b/include/net/udp_tunnel.h
@@ -181,9 +181,8 @@ static inline void udp_tunnel_encap_enable(struct socket *sock)
#if IS_ENABLED(CONFIG_IPV6)
if (sock->sk->sk_family == PF_INET6)
ipv6_stub->udpv6_encap_enable();
- else
#endif
- udp_encap_enable();
+ udp_encap_enable();
}
#define UDP_TUNNEL_NIC_MAX_TABLES 4
diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c
index 69ea765..48208fb 100644
--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c
@@ -596,6 +596,12 @@ void udp_encap_enable(void)
}
EXPORT_SYMBOL(udp_encap_enable);
+void udp_encap_disable(void)
+{
+ static_branch_dec(&udp_encap_needed_key);
+}
+EXPORT_SYMBOL(udp_encap_disable);
+
/* Handler for tunnels with arbitrary destination ports: no socket lookup, go
* through error handlers in encapsulations looking for a match.
*/
diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index b9f3dfd..d754292 100644
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -1608,8 +1608,10 @@ void udpv6_destroy_sock(struct sock *sk)
if (encap_destroy)
encap_destroy(sk);
}
- if (up->encap_enabled)
+ if (up->encap_enabled) {
static_branch_dec(&udpv6_encap_needed_key);
+ udp_encap_disable();
+ }
}
inet6_destroy_sock(sk);
diff --git a/net/rxrpc/local_object.c b/net/rxrpc/local_object.c
index 8c28810..fc10234 100644
--- a/net/rxrpc/local_object.c
+++ b/net/rxrpc/local_object.c
@@ -135,11 +135,13 @@ static int rxrpc_open_socket(struct rxrpc_local *local, struct net *net)
udp_sk(usk)->gro_receive = NULL;
udp_sk(usk)->gro_complete = NULL;
- udp_encap_enable();
#if IS_ENABLED(CONFIG_AF_RXRPC_IPV6)
if (local->srx.transport.family == AF_INET6)
udpv6_encap_enable();
+ else
#endif
+ udp_encap_enable();
+
usk->sk_error_report = rxrpc_error_report;
/* if a local address was supplied then bind it */
--
2.1.0
next reply other threads:[~2021-01-24 8:54 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-24 8:53 Xin Long [this message]
2021-01-26 2:34 ` [PATCHv3 net-next] udp: call udp_encap_enable for v6 sockets when enabling encap Willem de Bruijn
2021-01-26 3:50 ` Xin Long
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=d2a9b26103c84ff535a886e875c6c619057641c8.1611478403.git.lucien.xin@gmail.com \
--to=lucien.xin@gmail.com \
--cc=alexander.duyck@gmail.com \
--cc=davem@davemloft.net \
--cc=dhowells@redhat.com \
--cc=kuba@kernel.org \
--cc=martin.varghese@nokia.com \
--cc=netdev@vger.kernel.org \
--cc=pabeni@redhat.com \
--cc=willemb@google.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).