[PATCH 5.16 206/285] SUNRPC: Handle low memory situations in call_status()

Greg Kroah-Hartman
2022-04-12T08:25:55Z

From: Trond Myklebust <trond.myklebust@hammerspace.com>

[ 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>
---
net/sunrpc/clnt.c | 5 +++++
1 file changed, 5 insertions(+)

diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c
index bf1fd6caaf92..0222ad4523a9 100644
--- a/net/sunrpc/clnt.c
+++ b/net/sunrpc/clnt.c
@@ -2364,6 +2364,11 @@ 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;
--
2.35.1