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/core | |
| parent | f5ada26d6cca4c5d9a20eda55f44e772018b36af (diff) | |
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/core')
| -rw-r--r-- | net/core/sock.c | 7 |
1 files changed, 1 insertions, 6 deletions
diff --git a/net/core/sock.c b/net/core/sock.c index fba4d5b8553c..f4e2ff23d60e 100644 --- a/net/core/sock.c +++ b/net/core/sock.c @@ -3967,13 +3967,8 @@ int sock_common_recvmsg(struct socket *sock, struct msghdr *msg, size_t size, int flags) { struct sock *sk = sock->sk; - int addr_len = 0; - int err; - err = sk->sk_prot->recvmsg(sk, msg, size, flags, &addr_len); - if (err >= 0) - msg->msg_namelen = addr_len; - return err; + return sk->sk_prot->recvmsg(sk, msg, size, flags); } EXPORT_SYMBOL(sock_common_recvmsg); |