From 520df35648580241402476df146800f93d29b49c Mon Sep 17 00:00:00 2001
From: Zhang Xianwei <zhang.xianwei8@zte.com.cn>
Date: Wed, 7 Sep 2022 09:24:58 +0000
Subject: [PATCH] NFSv4.1: RECLAIM_COMPLETE must handle EACCES
stable inclusion
from stable-v4.19.256
commit a0b3a9b0e6832be88b426b242aa3320c3817e2fb
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I5Q0SQ
CVE: NA
--------------------------------
commit e35a5e782f67ed76a65ad0f23a484444a95f000f upstream.
A client should be able to handle getting an EACCES error while doing
a mount operation to reclaim state due to NFS4CLNT_RECLAIM_REBOOT
being set. If the server returns RPC_AUTH_BADCRED because authentication
failed when we execute "exportfs -au", then RECLAIM_COMPLETE will go a
wrong way. After mount succeeds, all OPEN call will fail due to an
NFS4ERR_GRACE error being returned. This patch is to fix it by resending
a RPC request.
Signed-off-by: Zhang Xianwei <zhang.xianwei8@zte.com.cn>
Signed-off-by: Yi Wang <wang.yi59@zte.com.cn>
Fixes: aa5190d0ed7d ("NFSv4: Kill nfs4_async_handle_error() abuses by NFSv4.1")
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Yongqiang Liu <liuyongqiang13@huawei.com>
---
fs/nfs/nfs4proc.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index fa90d83197e3..ed38f5a793d0 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -8823,6 +8823,9 @@ static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nf
rpc_delay(task, NFS4_POLL_RETRY_MAX);
/* fall through */
case -NFS4ERR_RETRY_UNCACHED_REP:
+ case -EACCES:
+ dprintk("%s: failed to reclaim complete error %d for server %s, retrying\n",
+ __func__, task->tk_status, clp->cl_hostname);
return -EAGAIN;
case -NFS4ERR_BADSESSION:
case -NFS4ERR_DEADSESSION:
--
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