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| author | Rao Shoaib <rao.shoaib@oracle.com> | 2020-06-25 13:46:00 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2020-06-25 16:26:25 -0700 |
| commit | 4c342f778fe234e0c2a2601d87fec8ba42f0d2c6 (patch) | |
| tree | 4fb433b9203a0bc16f661d442a8695d4be9bcfff /net/rds/transport.c | |
| parent | 6aeaf26222b230b3ab21f42e1e0d30738044ec69 (diff) | |
| download | linux-stable-4c342f778fe234e0c2a2601d87fec8ba42f0d2c6.tar.gz linux-stable-4c342f778fe234e0c2a2601d87fec8ba42f0d2c6.tar.bz2 linux-stable-4c342f778fe234e0c2a2601d87fec8ba42f0d2c6.zip | |
rds: transport module should be auto loaded when transport is set
This enhancement auto loads transport module when the transport
is set via SO_RDS_TRANSPORT socket option.
Reviewed-by: Ka-Cheong Poon <ka-cheong.poon@oracle.com>
Reviewed-by: Håkon Bugge <haakon.bugge@oracle.com>
Signed-off-by: Rao Shoaib <rao.shoaib@oracle.com>
Signed-off-by: Somasundaram Krishnasamy <somasundaram.krishnasamy@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 | 26 |
1 files changed, 17 insertions, 9 deletions
diff --git a/net/rds/transport.c b/net/rds/transport.c index 46f709a4b577..f8001ec80867 100644 --- a/net/rds/transport.c +++ b/net/rds/transport.c @@ -38,6 +38,12 @@ #include "rds.h" #include "loop.h" +static char * const rds_trans_modules[] = { + [RDS_TRANS_IB] = "rds_rdma", + [RDS_TRANS_GAP] = NULL, + [RDS_TRANS_TCP] = "rds_tcp", +}; + static struct rds_transport *transports[RDS_TRANS_COUNT]; static DECLARE_RWSEM(rds_trans_sem); @@ -110,18 +116,20 @@ 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; - } + trans = transports[t_type]; + if (!trans) { + up_read(&rds_trans_sem); + if (rds_trans_modules[t_type]) + request_module(rds_trans_modules[t_type]); + down_read(&rds_trans_sem); + trans = transports[t_type]; } + if (trans && trans->t_type == t_type && + (!trans->t_owner || try_module_get(trans->t_owner))) + ret = trans; + up_read(&rds_trans_sem); return ret; |