diff options
| author | Eric Dumazet <edumazet@google.com> | 2026-02-27 15:11:20 +0000 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2026-03-02 18:17:17 -0800 |
| commit | 8341c989ac77d712c7d6e2bce29e8a4bcb2eeae4 (patch) | |
| tree | e146696a6ec409dfd245355dd2bf77c8f4cba23b /net/l2tp | |
| parent | f5ada26d6cca4c5d9a20eda55f44e772018b36af (diff) | |
| download | linux-next-8341c989ac77d712c7d6e2bce29e8a4bcb2eeae4.tar.gz linux-next-8341c989ac77d712c7d6e2bce29e8a4bcb2eeae4.zip | |
net: remove addr_len argument of recvmsg() handlers
Use msg->msg_namelen as a place holder instead of a
temporary variable, notably in inet[6]_recvmsg().
This removes stack canaries and allows tail-calls.
$ scripts/bloat-o-meter -t vmlinux.old vmlinux
add/remove: 0/0 grow/shrink: 2/19 up/down: 26/-532 (-506)
Function old new delta
rawv6_recvmsg 744 767 +23
vsock_dgram_recvmsg 55 58 +3
vsock_connectible_recvmsg 50 47 -3
unix_stream_recvmsg 161 158 -3
unix_seqpacket_recvmsg 62 59 -3
unix_dgram_recvmsg 42 39 -3
tcp_recvmsg 546 543 -3
mptcp_recvmsg 1568 1565 -3
ping_recvmsg 806 800 -6
tcp_bpf_recvmsg_parser 983 974 -9
ip_recv_error 588 576 -12
ipv6_recv_rxpmtu 442 428 -14
udp_recvmsg 1243 1224 -19
ipv6_recv_error 1046 1024 -22
udpv6_recvmsg 1487 1461 -26
raw_recvmsg 465 437 -28
udp_bpf_recvmsg 1027 984 -43
sock_common_recvmsg 103 27 -76
inet_recvmsg 257 175 -82
inet6_recvmsg 257 175 -82
tcp_bpf_recvmsg 663 568 -95
Total: Before=25143834, After=25143328, chg -0.00%
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Willem de Bruijn <willemb@google.com>
Link: https://patch.msgid.link/20260227151120.1346573-1-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net/l2tp')
| -rw-r--r-- | net/l2tp/l2tp_ip.c | 4 | ||||
| -rw-r--r-- | net/l2tp/l2tp_ip6.c | 6 |
2 files changed, 5 insertions, 5 deletions
diff --git a/net/l2tp/l2tp_ip.c b/net/l2tp/l2tp_ip.c index cac1ff59cb83..acb2570c11f6 100644 --- a/net/l2tp/l2tp_ip.c +++ b/net/l2tp/l2tp_ip.c @@ -537,7 +537,7 @@ no_route: } static int l2tp_ip_recvmsg(struct sock *sk, struct msghdr *msg, - size_t len, int flags, int *addr_len) + size_t len, int flags) { struct inet_sock *inet = inet_sk(sk); size_t copied = 0; @@ -570,7 +570,7 @@ static int l2tp_ip_recvmsg(struct sock *sk, struct msghdr *msg, sin->sin_addr.s_addr = ip_hdr(skb)->saddr; sin->sin_port = 0; memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); - *addr_len = sizeof(*sin); + msg->msg_namelen = sizeof(*sin); } if (inet_cmsg_flags(inet)) ip_cmsg_recv(msg, skb); diff --git a/net/l2tp/l2tp_ip6.c b/net/l2tp/l2tp_ip6.c index 05a396ba6a3e..bdaae1b64d25 100644 --- a/net/l2tp/l2tp_ip6.c +++ b/net/l2tp/l2tp_ip6.c @@ -679,7 +679,7 @@ do_confirm: } static int l2tp_ip6_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, - int flags, int *addr_len) + int flags) { struct ipv6_pinfo *np = inet6_sk(sk); DECLARE_SOCKADDR(struct sockaddr_l2tpip6 *, lsa, msg->msg_name); @@ -691,7 +691,7 @@ static int l2tp_ip6_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, goto out; if (flags & MSG_ERRQUEUE) - return ipv6_recv_error(sk, msg, len, addr_len); + return ipv6_recv_error(sk, msg, len); skb = skb_recv_datagram(sk, flags, &err); if (!skb) @@ -719,7 +719,7 @@ static int l2tp_ip6_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, lsa->l2tp_conn_id = 0; if (ipv6_addr_type(&lsa->l2tp_addr) & IPV6_ADDR_LINKLOCAL) lsa->l2tp_scope_id = inet6_iif(skb); - *addr_len = sizeof(*lsa); + msg->msg_namelen = sizeof(*lsa); } if (np->rxopt.all) |