[PATCH 03/22] net: streamline __sys_getsockopt
From: Christoph Hellwig <hch@lst.de>
Date: 2020-07-17 06:24:15
Also in:
bpf, bridge, linux-arch, linux-bluetooth, linux-can, linux-sctp, lkml, mptcp, netfilter-devel
Subsystem:
networking [general], networking [sockets], the rest · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Kuniyuki Iwashima, Willem de Bruijn, Linus Torvalds
Return early when sockfd_lookup_light fails to reduce a level of indentation for most of the function body. Signed-off-by: Christoph Hellwig <hch@lst.de> --- net/socket.c | 31 ++++++++++++++----------------- 1 file changed, 14 insertions(+), 17 deletions(-)
diff --git a/net/socket.c b/net/socket.c
index 49a6daf0293b83..b79376b17b45b7 100644
--- a/net/socket.c
+++ b/net/socket.c@@ -2163,28 +2163,25 @@ static int __sys_getsockopt(int fd, int level, int optname, int max_optlen; sock = sockfd_lookup_light(fd, &err, &fput_needed); - if (sock != NULL) { - err = security_socket_getsockopt(sock, level, optname); - if (err) - goto out_put; + if (!sock) + return err; - max_optlen = BPF_CGROUP_GETSOCKOPT_MAX_OPTLEN(optlen); + err = security_socket_getsockopt(sock, level, optname); + if (err) + goto out_put; - if (level == SOL_SOCKET) - err = - sock_getsockopt(sock, level, optname, optval, + max_optlen = BPF_CGROUP_GETSOCKOPT_MAX_OPTLEN(optlen); + + if (level == SOL_SOCKET) + err = sock_getsockopt(sock, level, optname, optval, optlen); + else + err = sock->ops->getsockopt(sock, level, optname, optval, optlen); - else - err = - sock->ops->getsockopt(sock, level, optname, optval, - optlen); - err = BPF_CGROUP_RUN_PROG_GETSOCKOPT(sock->sk, level, optname, - optval, optlen, - max_optlen, err); + err = BPF_CGROUP_RUN_PROG_GETSOCKOPT(sock->sk, level, optname, optval, + optlen, max_optlen, err); out_put: - fput_light(sock->file, fput_needed); - } + fput_light(sock->file, fput_needed); return err; }
--
2.27.0