diff options
| author | Santosh Shilimkar <santosh.shilimkar@oracle.com> | 2018-10-23 23:09:00 -0400 |
|---|---|---|
| committer | Santosh Shilimkar <santosh.shilimkar@oracle.com> | 2019-02-04 14:59:11 -0800 |
| commit | d021fabf525ffdaeb4e6f1cf50e1ba325ca5273b (patch) | |
| tree | fa9834c42d9df306913f052e884869f5cf76a412 /net/rds | |
| parent | cdc306a5c9cd3607db5d018c6320cdd923c04373 (diff) | |
| download | linux-d021fabf525ffdaeb4e6f1cf50e1ba325ca5273b.tar.gz | |
rds: rdma: add consumer reject
For legacy protocol version incompatibility with non linux RDS,
consumer reject reason being used to convey it to peer. But the
choice of reject reason value as '1' was really poor.
Anyway for interoperability reasons with shipping products,
it needs to be supported. For any future versions, properly
encoded reject reason should to be used.
Reviewed-by: Sowmini Varadhan <sowmini.varadhan@oracle.com>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
[yanjun.zhu@oracle.com: Adapted original patch with ipv6 changes]
Signed-off-by: Zhu Yanjun <yanjun.zhu@oracle.com>
Diffstat (limited to 'net/rds')
| -rw-r--r-- | net/rds/ib_cm.c | 6 | ||||
| -rw-r--r-- | net/rds/rdma_transport.c | 12 | ||||
| -rw-r--r-- | net/rds/rdma_transport.h | 6 |
3 files changed, 22 insertions, 2 deletions
diff --git a/net/rds/ib_cm.c b/net/rds/ib_cm.c index 0eeae0910f06f..a1c3ad380ec81 100644 --- a/net/rds/ib_cm.c +++ b/net/rds/ib_cm.c @@ -734,8 +734,10 @@ int rds_ib_cm_handle_connect(struct rdma_cm_id *cm_id, /* Check whether the remote protocol version matches ours. */ version = rds_ib_protocol_compatible(event, isv6); - if (!version) + if (!version) { + err = RDS_RDMA_REJ_INCOMPAT; goto out; + } dp = event->param.conn.private_data; if (isv6) { @@ -851,7 +853,7 @@ out: if (conn) mutex_unlock(&conn->c_cm_lock); if (err) - rdma_reject(cm_id, NULL, 0); + rdma_reject(cm_id, &err, sizeof(int)); return destroy; } diff --git a/net/rds/rdma_transport.c b/net/rds/rdma_transport.c index 6b0f57c83a2ad..63cbc6b8560ca 100644 --- a/net/rds/rdma_transport.c +++ b/net/rds/rdma_transport.c @@ -51,6 +51,8 @@ static int rds_rdma_cm_event_handler_cmn(struct rdma_cm_id *cm_id, struct rds_connection *conn = cm_id->context; struct rds_transport *trans; int ret = 0; + int *err; + u8 len; rdsdebug("conn %p id %p handling event %u (%s)\n", conn, cm_id, event->event, rdma_event_msg(event->event)); @@ -106,8 +108,18 @@ static int rds_rdma_cm_event_handler_cmn(struct rdma_cm_id *cm_id, break; case RDMA_CM_EVENT_REJECTED: + if (!conn) + break; + err = (int *)rdma_consumer_reject_data(cm_id, event, &len); + if (!err || (err && ((*err) == RDS_RDMA_REJ_INCOMPAT))) { + pr_warn("RDS/RDMA: conn <%pI6c, %pI6c> rejected, dropping connection\n", + &conn->c_laddr, &conn->c_faddr); + conn->c_proposed_version = RDS_PROTOCOL_COMPAT_VERSION; + rds_conn_drop(conn); + } rdsdebug("Connection rejected: %s\n", rdma_reject_msg(cm_id, event->status)); + break; /* FALLTHROUGH */ case RDMA_CM_EVENT_ADDR_ERROR: case RDMA_CM_EVENT_ROUTE_ERROR: diff --git a/net/rds/rdma_transport.h b/net/rds/rdma_transport.h index 200d3134aaae1..bfafd4a6d8271 100644 --- a/net/rds/rdma_transport.h +++ b/net/rds/rdma_transport.h @@ -11,6 +11,12 @@ #define RDS_RDMA_RESOLVE_TIMEOUT_MS 5000 +/* Below reject reason is for legacy interoperability issue with non-linux + * RDS endpoints where older version incompatibility is conveyed via value 1. + * For future version(s), proper encoded reject reason should be be used. + */ +#define RDS_RDMA_REJ_INCOMPAT 1 + int rds_rdma_conn_connect(struct rds_connection *conn); int rds_rdma_cm_event_handler(struct rdma_cm_id *cm_id, struct rdma_cm_event *event); |