diff options
| author | Chuck Lever <chuck.lever@oracle.com> | 2018-02-28 15:30:54 -0500 |
|---|---|---|
| committer | Anna Schumaker <Anna.Schumaker@Netapp.com> | 2018-04-10 16:06:22 -0400 |
| commit | fb14ae8853e4f0347950f98e604fa2f4f3b3abe1 (patch) | |
| tree | 734f67197f925ed212be6d3b4dea9757dd38bef6 /net | |
| parent | ae741a855170fa97adabce7e48bdf9de71186a5f (diff) | |
xprtrdma: "Support" call-only RPCs
RPC-over-RDMA version 1 credit accounting relies on there being a
response message for every RPC Call. This means that RPC procedures
that have no reply will disrupt credit accounting, just in the same
way as a retransmit would (since it is sent because no reply has
arrived). Deal with the "no reply" case the same way.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Diffstat (limited to 'net')
| -rw-r--r-- | net/sunrpc/sunrpc.h | 6 | ||||
| -rw-r--r-- | net/sunrpc/xprtrdma/transport.c | 6 |
2 files changed, 6 insertions, 6 deletions
diff --git a/net/sunrpc/sunrpc.h b/net/sunrpc/sunrpc.h index f2b7cb540e61..09a0315ea77b 100644 --- a/net/sunrpc/sunrpc.h +++ b/net/sunrpc/sunrpc.h @@ -37,12 +37,6 @@ struct rpc_buffer { char data[]; }; -static inline int rpc_reply_expected(struct rpc_task *task) -{ - return (task->tk_msg.rpc_proc != NULL) && - (task->tk_msg.rpc_proc->p_decode != NULL); -} - static inline int sock_is_loopback(struct sock *sk) { struct dst_entry *dst; diff --git a/net/sunrpc/xprtrdma/transport.c b/net/sunrpc/xprtrdma/transport.c index 08196896953d..7e39faa90c41 100644 --- a/net/sunrpc/xprtrdma/transport.c +++ b/net/sunrpc/xprtrdma/transport.c @@ -728,6 +728,12 @@ xprt_rdma_send_request(struct rpc_task *task) rqst->rq_xmit_bytes_sent += rqst->rq_snd_buf.len; rqst->rq_bytes_sent = 0; + + /* An RPC with no reply will throw off credit accounting, + * so drop the connection to reset the credit grant. + */ + if (!rpc_reply_expected(task)) + goto drop_connection; return 0; failed_marshal: |