From 9b2c45d479d0fb8647c9e83359df69162b5fbe5f Mon Sep 17 00:00:00 2001 From: Denys Vlasenko Date: Mon, 12 Feb 2018 20:00:20 +0100 Subject: net: make getname() functions return length rather than use int* parameter Changes since v1: Added changes in these files: drivers/infiniband/hw/usnic/usnic_transport.c drivers/staging/lustre/lnet/lnet/lib-socket.c drivers/target/iscsi/iscsi_target_login.c drivers/vhost/net.c fs/dlm/lowcomms.c fs/ocfs2/cluster/tcp.c security/tomoyo/network.c Before: All these functions either return a negative error indicator, or store length of sockaddr into "int *socklen" parameter and return zero on success. "int *socklen" parameter is awkward. For example, if caller does not care, it still needs to provide on-stack storage for the value it does not need. None of the many FOO_getname() functions of various protocols ever used old value of *socklen. They always just overwrite it. This change drops this parameter, and makes all these functions, on success, return length of sockaddr. It's always >= 0 and can be differentiated from an error. Tests in callers are changed from "if (err)" to "if (err < 0)", where needed. rpc_sockname() lost "int buflen" parameter, since its only use was to be passed to kernel_getsockname() as &buflen and subsequently not used in any way. Userspace API is not changed. text data bss dec hex filename 30108430 2633624 873672 33615726 200ef6e vmlinux.before.o 30108109 2633612 873672 33615393 200ee21 vmlinux.o Signed-off-by: Denys Vlasenko CC: David S. Miller CC: linux-kernel@vger.kernel.org CC: netdev@vger.kernel.org CC: linux-bluetooth@vger.kernel.org CC: linux-decnet-user@lists.sourceforge.net CC: linux-wireless@vger.kernel.org CC: linux-rdma@vger.kernel.org CC: linux-sctp@vger.kernel.org CC: linux-nfs@vger.kernel.org CC: linux-x25@vger.kernel.org Signed-off-by: David S. Miller --- net/smc/af_smc.c | 11 +++++------ 1 file changed, 5 insertions(+), 6 deletions(-) (limited to 'net/smc') diff --git a/net/smc/af_smc.c b/net/smc/af_smc.c index da1a5cdefd13..38ae22b65e77 100644 --- a/net/smc/af_smc.c +++ b/net/smc/af_smc.c @@ -281,7 +281,6 @@ int smc_netinfo_by_tcpsk(struct socket *clcsock, struct in_device *in_dev; struct sockaddr_in addr; int rc = -ENOENT; - int len; if (!dst) { rc = -ENOTCONN; @@ -293,7 +292,7 @@ int smc_netinfo_by_tcpsk(struct socket *clcsock, } /* get address to which the internal TCP socket is bound */ - kernel_getsockname(clcsock, (struct sockaddr *)&addr, &len); + kernel_getsockname(clcsock, (struct sockaddr *)&addr); /* analyze IPv4 specific data of net_device belonging to TCP socket */ rcu_read_lock(); in_dev = __in_dev_get_rcu(dst->dev); @@ -771,7 +770,7 @@ static void smc_listen_work(struct work_struct *work) u8 buf[SMC_CLC_MAX_LEN]; struct smc_link *link; int reason_code = 0; - int rc = 0, len; + int rc = 0; __be32 subnet; u8 prefix_len; u8 ibport; @@ -824,7 +823,7 @@ static void smc_listen_work(struct work_struct *work) } /* get address of the peer connected to the internal TCP socket */ - kernel_getpeername(newclcsock, (struct sockaddr *)&peeraddr, &len); + kernel_getpeername(newclcsock, (struct sockaddr *)&peeraddr); /* allocate connection / link group */ mutex_lock(&smc_create_lgr_pending); @@ -1075,7 +1074,7 @@ out: } static int smc_getname(struct socket *sock, struct sockaddr *addr, - int *len, int peer) + int peer) { struct smc_sock *smc; @@ -1085,7 +1084,7 @@ static int smc_getname(struct socket *sock, struct sockaddr *addr, smc = smc_sk(sock->sk); - return smc->clcsock->ops->getname(smc->clcsock, addr, len, peer); + return smc->clcsock->ops->getname(smc->clcsock, addr, peer); } static int smc_sendmsg(struct socket *sock, struct msghdr *msg, size_t len) -- cgit v1.2.3-58-ga151