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authorSowmini Varadhan <sowmini.varadhan@oracle.com>2015-05-29 17:28:09 -0400
committerDavid S. Miller <davem@davemloft.net>2015-05-31 21:47:23 -0700
commit8ba38460f363e4d26d666aae9bc7fd3afa5f8e43 (patch)
tree006c24e39896b5d0911c957533b02defc4e4b12b /net/rds/af_rds.c
parentd97dac54bf83b2a3df85fba37595e355627e0f2b (diff)
downloadlinux-8ba38460f363e4d26d666aae9bc7fd3afa5f8e43.tar.bz2
net/rds Add getsockopt support for SO_RDS_TRANSPORT
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 <sowmini.varadhan@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/rds/af_rds.c')
-rw-r--r--net/rds/af_rds.c14
1 files changed, 14 insertions, 0 deletions
diff --git a/net/rds/af_rds.c b/net/rds/af_rds.c
index 04877441fb01..2ad9032372b2 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;
}