diff options
| author | Sowmini Varadhan <sowmini.varadhan@oracle.com> | 2015-05-29 17:28:08 -0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-05-31 21:47:23 -0700 |
| commit | d97dac54bf83b2a3df85fba37595e355627e0f2b (patch) | |
| tree | 7a28dad3c812ffa56b8001ee1759c6493a30d3e0 /net/rds/transport.c | |
| parent | a28c257c9eb0bd76a4adcac97c07e34044ec71fb (diff) | |
net/rds: Add setsockopt support for SO_RDS_TRANSPORT
An application may deterministically attach the underlying transport for
a PF_RDS socket by invoking setsockopt(2) with the SO_RDS_TRANSPORT
option at the SOL_RDS level. The integer argument to setsockopt must be
one of the RDS_TRANS_* transport types, e.g., RDS_TRANS_TCP. The option
must be specified before invoking bind(2) on the socket, and may only
be used once on the socket. An attempt to set the option on a bound
socket, or to invoke the option after a successful SO_RDS_TRANSPORT
attachment, will return EOPNOTSUPP.
Signed-off-by: Sowmini Varadhan <sowmini.varadhan@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/rds/transport.c')
| -rw-r--r-- | net/rds/transport.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/net/rds/transport.c b/net/rds/transport.c index 7f2ac4fec367..8b4a6cd2c3a7 100644 --- a/net/rds/transport.c +++ b/net/rds/transport.c @@ -101,6 +101,27 @@ struct rds_transport *rds_trans_get_preferred(__be32 addr) return ret; } +struct rds_transport *rds_trans_get(int t_type) +{ + struct rds_transport *ret = NULL; + struct rds_transport *trans; + unsigned int i; + + down_read(&rds_trans_sem); + for (i = 0; i < RDS_TRANS_COUNT; i++) { + trans = transports[i]; + + if (trans && trans->t_type == t_type && + (!trans->t_owner || try_module_get(trans->t_owner))) { + ret = trans; + break; + } + } + up_read(&rds_trans_sem); + + return ret; +} + /* * This returns the number of stats entries in the snapshot and only * copies them using the iter if there is enough space for them. The |