linux-kernel - [PATCH AUTOSEL 4.4 2/9] NFSv4.1: handle NFS4ERR_NOSPC by CREATE

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Date:   Tue, 30 Nov 2021 09:53:55 -0500
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Olga Kornievskaia <kolga@...app.com>,
        Trond Myklebust <trond.myklebust@...merspace.com>,
        Sasha Levin <sashal@...nel.org>, anna.schumaker@...app.com,
        linux-nfs@...r.kernel.org
Subject: [PATCH AUTOSEL 4.4 2/9] NFSv4.1: handle NFS4ERR_NOSPC by CREATE_SESSION

From: Olga Kornievskaia <kolga@...app.com>

[ Upstream commit ea027cb2e1b59c76582af867b71d5c037fa6bb8e ]

When the client receives ERR_NOSPC on reply to CREATE_SESSION
it leads to a client hanging in nfs_wait_client_init_complete().
Instead, complete and fail the client initiation with an EIO
error which allows for the mount command to fail instead of
hanging.

Signed-off-by: Olga Kornievskaia <kolga@...app.com>
Signed-off-by: Trond Myklebust <trond.myklebust@...merspace.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 fs/nfs/nfs4state.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c
index ef3ed2b1fd278..9e872db0f70ea 100644
--- a/fs/nfs/nfs4state.c
+++ b/fs/nfs/nfs4state.c
@@ -1843,6 +1843,10 @@ static int nfs4_handle_reclaim_lease_error(struct nfs_client *clp, int status)
 		dprintk("%s: exit with error %d for server %s\n",
 				__func__, -EPROTONOSUPPORT, clp->cl_hostname);
 		return -EPROTONOSUPPORT;
+	case -ENOSPC:
+		if (clp->cl_cons_state == NFS_CS_SESSION_INITING)
+			nfs_mark_client_ready(clp, -EIO);
+		return -EIO;
 	case -NFS4ERR_NOT_SAME: /* FixMe: implement recovery
 				 * in nfs4_exchange_id */
 	default:
-- 
2.33.0