[PATCH 3/3] net/rds Add getsockopt support for SO_RDS_TRANSPORT
From: Sowmini Varadhan <hidden>
Date: 2015-05-29 21:29:16
Also in:
lkml
Subsystem:
networking [general], rds - reliable datagram sockets, the rest · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Allison Henderson, Linus Torvalds
The currently attached transport for a PF_RDS socket may be obtained from user space by invoking getsockopt(2) using the SO_RDS_TRANSPORT option at the SOL_RDS level. The integer optval returned will be one of the RDS_TRANS_* constants defined in linux/rds.h. Signed-off-by: Sowmini Varadhan <redacted> --- net/rds/af_rds.c | 14 ++++++++++++++ 1 files changed, 14 insertions(+), 0 deletions(-)
diff --git a/net/rds/af_rds.c b/net/rds/af_rds.c
index 0487744..2ad9032 100644
--- a/net/rds/af_rds.c
+++ b/net/rds/af_rds.c@@ -339,6 +339,7 @@ static int rds_getsockopt(struct socket *sock, int level, int optname, { struct rds_sock *rs = rds_sk_to_rs(sock->sk); int ret = -ENOPROTOOPT, len; + int trans; if (level != SOL_RDS) goto out;
@@ -364,6 +365,19 @@ static int rds_getsockopt(struct socket *sock, int level, int optname, else ret = 0; break; + case SO_RDS_TRANSPORT: + if (len < sizeof(int)) { + ret = -EINVAL; + break; + } + trans = (rs->rs_transport ? rs->rs_transport->t_type : + RDS_TRANS_NONE); /* unbound */ + if (put_user(trans, (int __user *)optval) || + put_user(sizeof(int), optlen)) + ret = -EFAULT; + else + ret = 0; + break; default: break; }
--
1.7.1