From 51363b8751a673a00ad48eea895266396d53fa52 Mon Sep 17 00:00:00 2001 From: Ursula Braun Date: Wed, 8 Feb 2012 00:19:48 +0000 Subject: af_iucv: allow retrieval of maximum message size For HS transport the maximum message size depends on the MTU-size of the HS-device bound to the AF_IUCV socket. This patch adds a getsockopt option MSGSIZE returning the maximum message size that can be handled for this AF_IUCV socket. Signed-off-by: Ursula Braun Signed-off-by: Frank Blaschka Signed-off-by: David S. Miller --- net/iucv/af_iucv.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) (limited to 'net/iucv') diff --git a/net/iucv/af_iucv.c b/net/iucv/af_iucv.c index fbce4a3..98d1f0b 100644 --- a/net/iucv/af_iucv.c +++ b/net/iucv/af_iucv.c @@ -1633,7 +1633,8 @@ static int iucv_sock_getsockopt(struct socket *sock, int level, int optname, { struct sock *sk = sock->sk; struct iucv_sock *iucv = iucv_sk(sk); - int val, len; + unsigned int val; + int len; if (level != SOL_IUCV) return -ENOPROTOOPT; @@ -1656,6 +1657,13 @@ static int iucv_sock_getsockopt(struct socket *sock, int level, int optname, : iucv->msglimit; /* default */ release_sock(sk); break; + case SO_MSGSIZE: + if (sk->sk_state == IUCV_OPEN) + return -EBADFD; + val = (iucv->hs_dev) ? iucv->hs_dev->mtu - + sizeof(struct af_iucv_trans_hdr) - ETH_HLEN : + 0x7fffffff; + break; default: return -ENOPROTOOPT; } -- cgit v1.1