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From:   trondmy@kernel.org
To:     linux-nfs@vger.kernel.org
Cc:     ChenXiaoSong <chenxiaosong2@huawei.com>
Subject: [PATCH] NFSv4.x: Fail client initialisation if state manager thread can't run
Date:   Tue,  6 Dec 2022 14:02:49 -0500
Message-Id: <20221206190249.438037-1-trondmy@kernel.org>
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From: Trond Myklebust <trond.myklebust@hammerspace.com>

If the state manager thread fails to start, then we should just mark the
client initialisation as failed so that other processes or threads don't
get stuck in nfs_wait_client_init_complete().

Reported-by: ChenXiaoSong <chenxiaosong2@huawei.com>
Fixes: 4697bd5e9419 ("NFSv4: Fix a race in the net namespace mount notification")
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
---
 fs/nfs/nfs4state.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c
index 7c1f43507813..5720196141e1 100644
--- a/fs/nfs/nfs4state.c
+++ b/fs/nfs/nfs4state.c
@@ -1230,6 +1230,8 @@ void nfs4_schedule_state_manager(struct nfs_client *clp)
 	if (IS_ERR(task)) {
 		printk(KERN_ERR "%s: kthread_run: %ld\n",
 			__func__, PTR_ERR(task));
+		if (!nfs_client_init_is_complete(clp))
+			nfs_mark_client_ready(clp, PTR_ERR(task));
 		nfs4_clear_state_manager_bit(clp);
 		clear_bit(NFS4CLNT_MANAGER_AVAILABLE, &clp->cl_state);
 		nfs_put_client(clp);
-- 
2.38.1