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authorChuck Lever <chuck.lever@oracle.com>2021-02-21 02:53:40 +0300
committerChuck Lever <chuck.lever@oracle.com>2021-03-22 20:22:13 +0300
commite844d307d46cfa7e09cdb671941bfd5f1be86773 (patch)
treec5fad5b7c90452b8ca93f4ac1ec26337eca9df18 /net/sunrpc
parentc558d47596867ff1082fd7475b63670f63f7f5cf (diff)
downloadlinux-e844d307d46cfa7e09cdb671941bfd5f1be86773.tar.xz
svcrdma: Add a "deferred close" helper
Refactor a bit of commonly used logic so that every site that wants a close deferred to an nfsd thread does all the right things (set_bit(XPT_CLOSE) then enqueue). Also, once XPT_CLOSE is set on a transport, it is never cleared. If XPT_CLOSE is already set, then the close is already being handled and the enqueue can be skipped. Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Diffstat (limited to 'net/sunrpc')
-rw-r--r--net/sunrpc/svc_xprt.c14
-rw-r--r--net/sunrpc/svcsock.c15
-rw-r--r--net/sunrpc/xprtrdma/svc_rdma_recvfrom.c3
-rw-r--r--net/sunrpc/xprtrdma/svc_rdma_rw.c5
-rw-r--r--net/sunrpc/xprtrdma/svc_rdma_sendto.c10
-rw-r--r--net/sunrpc/xprtrdma/svc_rdma_transport.c6
6 files changed, 29 insertions, 24 deletions
diff --git a/net/sunrpc/svc_xprt.c b/net/sunrpc/svc_xprt.c
index 3cdd71a8df1e..b134fc5f3b8d 100644
--- a/net/sunrpc/svc_xprt.c
+++ b/net/sunrpc/svc_xprt.c
@@ -139,6 +139,20 @@ int svc_print_xprts(char *buf, int maxlen)
return len;
}
+/**
+ * svc_xprt_deferred_close - Close a transport
+ * @xprt: transport instance
+ *
+ * Used in contexts that need to defer the work of shutting down
+ * the transport to an nfsd thread.
+ */
+void svc_xprt_deferred_close(struct svc_xprt *xprt)
+{
+ if (!test_and_set_bit(XPT_CLOSE, &xprt->xpt_flags))
+ svc_xprt_enqueue(xprt);
+}
+EXPORT_SYMBOL_GPL(svc_xprt_deferred_close);
+
static void svc_xprt_free(struct kref *kref)
{
struct svc_xprt *xprt =
diff --git a/net/sunrpc/svcsock.c b/net/sunrpc/svcsock.c
index 2e2f007dfc9f..22454b2df5be 100644
--- a/net/sunrpc/svcsock.c
+++ b/net/sunrpc/svcsock.c
@@ -728,10 +728,8 @@ static void svc_tcp_state_change(struct sock *sk)
rmb();
svsk->sk_ostate(sk);
trace_svcsock_tcp_state(&svsk->sk_xprt, svsk->sk_sock);
- if (sk->sk_state != TCP_ESTABLISHED) {
- set_bit(XPT_CLOSE, &svsk->sk_xprt.xpt_flags);
- svc_xprt_enqueue(&svsk->sk_xprt);
- }
+ if (sk->sk_state != TCP_ESTABLISHED)
+ svc_xprt_deferred_close(&svsk->sk_xprt);
}
}
@@ -901,7 +899,7 @@ err_too_large:
net_notice_ratelimited("svc: %s %s RPC fragment too large: %d\n",
__func__, svsk->sk_xprt.xpt_server->sv_name,
svc_sock_reclen(svsk));
- set_bit(XPT_CLOSE, &svsk->sk_xprt.xpt_flags);
+ svc_xprt_deferred_close(&svsk->sk_xprt);
err_short:
return -EAGAIN;
}
@@ -1057,7 +1055,7 @@ err_nuts:
svsk->sk_datalen = 0;
err_delete:
trace_svcsock_tcp_recv_err(&svsk->sk_xprt, len);
- set_bit(XPT_CLOSE, &svsk->sk_xprt.xpt_flags);
+ svc_xprt_deferred_close(&svsk->sk_xprt);
err_noclose:
return 0; /* record not complete */
}
@@ -1188,8 +1186,7 @@ out_close:
xprt->xpt_server->sv_name,
(err < 0) ? "got error" : "sent",
(err < 0) ? err : sent, xdr->len);
- set_bit(XPT_CLOSE, &xprt->xpt_flags);
- svc_xprt_enqueue(xprt);
+ svc_xprt_deferred_close(xprt);
atomic_dec(&svsk->sk_sendqlen);
mutex_unlock(&xprt->xpt_mutex);
return -EAGAIN;
@@ -1268,7 +1265,7 @@ static void svc_tcp_init(struct svc_sock *svsk, struct svc_serv *serv)
case TCP_ESTABLISHED:
break;
default:
- set_bit(XPT_CLOSE, &svsk->sk_xprt.xpt_flags);
+ svc_xprt_deferred_close(&svsk->sk_xprt);
}
}
}
diff --git a/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c b/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c
index 2571188ef7f2..8d93d26e0318 100644
--- a/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c
+++ b/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c
@@ -367,8 +367,7 @@ static void svc_rdma_wc_receive(struct ib_cq *cq, struct ib_wc *wc)
flushed:
svc_rdma_recv_ctxt_put(rdma, ctxt);
- set_bit(XPT_CLOSE, &rdma->sc_xprt.xpt_flags);
- svc_xprt_enqueue(&rdma->sc_xprt);
+ svc_xprt_deferred_close(&rdma->sc_xprt);
}
/**
diff --git a/net/sunrpc/xprtrdma/svc_rdma_rw.c b/net/sunrpc/xprtrdma/svc_rdma_rw.c
index 693d139a8633..d7054e3a8e33 100644
--- a/net/sunrpc/xprtrdma/svc_rdma_rw.c
+++ b/net/sunrpc/xprtrdma/svc_rdma_rw.c
@@ -250,7 +250,7 @@ static void svc_rdma_write_done(struct ib_cq *cq, struct ib_wc *wc)
wake_up(&rdma->sc_send_wait);
if (unlikely(wc->status != IB_WC_SUCCESS))
- set_bit(XPT_CLOSE, &rdma->sc_xprt.xpt_flags);
+ svc_xprt_deferred_close(&rdma->sc_xprt);
svc_rdma_write_info_free(info);
}
@@ -334,7 +334,6 @@ static void svc_rdma_wc_read_done(struct ib_cq *cq, struct ib_wc *wc)
static int svc_rdma_post_chunk_ctxt(struct svc_rdma_chunk_ctxt *cc)
{
struct svcxprt_rdma *rdma = cc->cc_rdma;
- struct svc_xprt *xprt = &rdma->sc_xprt;
struct ib_send_wr *first_wr;
const struct ib_send_wr *bad_wr;
struct list_head *tmp;
@@ -373,7 +372,7 @@ static int svc_rdma_post_chunk_ctxt(struct svc_rdma_chunk_ctxt *cc)
} while (1);
trace_svcrdma_sq_post_err(rdma, ret);
- set_bit(XPT_CLOSE, &xprt->xpt_flags);
+ svc_xprt_deferred_close(&rdma->sc_xprt);
/* If even one was posted, there will be a completion. */
if (bad_wr != first_wr)
diff --git a/net/sunrpc/xprtrdma/svc_rdma_sendto.c b/net/sunrpc/xprtrdma/svc_rdma_sendto.c
index e6fab5dd20d0..4471a0fcd3a3 100644
--- a/net/sunrpc/xprtrdma/svc_rdma_sendto.c
+++ b/net/sunrpc/xprtrdma/svc_rdma_sendto.c
@@ -285,10 +285,8 @@ static void svc_rdma_wc_send(struct ib_cq *cq, struct ib_wc *wc)
svc_rdma_send_ctxt_put(rdma, ctxt);
- if (unlikely(wc->status != IB_WC_SUCCESS)) {
- set_bit(XPT_CLOSE, &rdma->sc_xprt.xpt_flags);
- svc_xprt_enqueue(&rdma->sc_xprt);
- }
+ if (unlikely(wc->status != IB_WC_SUCCESS))
+ svc_xprt_deferred_close(&rdma->sc_xprt);
}
/**
@@ -334,7 +332,7 @@ int svc_rdma_send(struct svcxprt_rdma *rdma, struct svc_rdma_send_ctxt *ctxt)
}
trace_svcrdma_sq_post_err(rdma, ret);
- set_bit(XPT_CLOSE, &rdma->sc_xprt.xpt_flags);
+ svc_xprt_deferred_close(&rdma->sc_xprt);
wake_up(&rdma->sc_send_wait);
return ret;
}
@@ -994,7 +992,7 @@ int svc_rdma_sendto(struct svc_rqst *rqstp)
svc_rdma_send_ctxt_put(rdma, sctxt);
err0:
trace_svcrdma_send_err(rqstp, ret);
- set_bit(XPT_CLOSE, &xprt->xpt_flags);
+ svc_xprt_deferred_close(&rdma->sc_xprt);
return -ENOTCONN;
}
diff --git a/net/sunrpc/xprtrdma/svc_rdma_transport.c b/net/sunrpc/xprtrdma/svc_rdma_transport.c
index e629eacfedfc..3646216211c5 100644
--- a/net/sunrpc/xprtrdma/svc_rdma_transport.c
+++ b/net/sunrpc/xprtrdma/svc_rdma_transport.c
@@ -119,8 +119,7 @@ static void qp_event_handler(struct ib_event *event, void *context)
case IB_EVENT_QP_ACCESS_ERR:
case IB_EVENT_DEVICE_FATAL:
default:
- set_bit(XPT_CLOSE, &xprt->xpt_flags);
- svc_xprt_enqueue(xprt);
+ svc_xprt_deferred_close(xprt);
break;
}
}
@@ -286,8 +285,7 @@ static int svc_rdma_cma_handler(struct rdma_cm_id *cma_id,
break;
case RDMA_CM_EVENT_DISCONNECTED:
case RDMA_CM_EVENT_DEVICE_REMOVAL:
- set_bit(XPT_CLOSE, &xprt->xpt_flags);
- svc_xprt_enqueue(xprt);
+ svc_xprt_deferred_close(xprt);
break;
default:
break;