NFSv4.1: RECLAIM_COMPLETE must handle EACCES

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>

diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 94571f7..a93b408 100644 (file)
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -9408,6 +9408,9 @@ static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nf
                rpc_delay(task, NFS4_POLL_RETRY_MAX);
                fallthrough;
        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: