From: Trond Myklebust <trond.myklebust@hammerspace.com>
Date: Thu, 7 Apr 2022 13:50:19 +0000 (-0400)
Subject: SUNRPC: Handle low memory situations in call_status()
X-Git-Tag: v5.10.111~44
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=9a45e08636bba2949819cbf4d9ee0b974dd5c7a6;p=users%2Fdwmw2%2Flinux.git

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 bae42ada8c100..c5af31312e0cf 100644
--- a/net/sunrpc/clnt.c
+++ b/net/sunrpc/clnt.c
@@ -2342,6 +2342,11 @@ 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;