SUNRPC: Handle low memory situations in call_status()

[ Upstream commit 9d82819d5b065348ce623f196bf601028e22ed00 ]

We need to handle ENFILE, ENOBUFS, and ENOMEM, because
xprt_wake_pending_tasks() can be called with any one of these due to
socket creation failures.

Fixes: b61d59fffd3e ("SUNRPC: xs_tcp_connect_worker{4,6}: merge common code")
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c
index 9a183c2..3286add 100644 (file)
--- a/net/sunrpc/clnt.c
+++ b/net/sunrpc/clnt.c
@@ -2369,6 +2369,11 @@ call_status(struct rpc_task *task)
        case -EPIPE:
        case -EAGAIN:
                break;
+       case -ENFILE:
+       case -ENOBUFS:
+       case -ENOMEM:
+               rpc_delay(task, HZ>>2);
+               break;
        case -EIO:
                /* shutdown or soft timeout */
                goto out_exit;