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nfsd: back channel stuck in SEQ4_STATUS_CB_PATH_DOWN
[ Upstream commit 02579b2ff8
]
When the back channel enters SEQ4_STATUS_CB_PATH_DOWN state, the client
recovers by sending BIND_CONN_TO_SESSION but the server fails to recover
the back channel and leaves it as NFSD4_CB_DOWN.
Fix by enhancing nfsd4_bind_conn_to_session to probe the back channel
by calling nfsd4_probe_callback.
Signed-off-by: Dai Ngo <dai.ngo@oracle.com>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
parent
f986cf2702
commit
83050cc239
1 changed files with 13 additions and 3 deletions
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@ -3512,7 +3512,7 @@ static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_s
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}
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static __be32 nfsd4_match_existing_connection(struct svc_rqst *rqst,
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struct nfsd4_session *session, u32 req)
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struct nfsd4_session *session, u32 req, struct nfsd4_conn **conn)
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{
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struct nfs4_client *clp = session->se_client;
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struct svc_xprt *xpt = rqst->rq_xprt;
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@ -3535,6 +3535,8 @@ static __be32 nfsd4_match_existing_connection(struct svc_rqst *rqst,
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else
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status = nfserr_inval;
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spin_unlock(&clp->cl_lock);
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if (status == nfs_ok && conn)
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*conn = c;
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return status;
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}
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@ -3559,8 +3561,16 @@ __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp,
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status = nfserr_wrong_cred;
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if (!nfsd4_mach_creds_match(session->se_client, rqstp))
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goto out;
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status = nfsd4_match_existing_connection(rqstp, session, bcts->dir);
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if (status == nfs_ok || status == nfserr_inval)
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status = nfsd4_match_existing_connection(rqstp, session,
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bcts->dir, &conn);
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if (status == nfs_ok) {
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if (bcts->dir == NFS4_CDFC4_FORE_OR_BOTH ||
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bcts->dir == NFS4_CDFC4_BACK)
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conn->cn_flags |= NFS4_CDFC4_BACK;
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nfsd4_probe_callback(session->se_client);
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goto out;
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}
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if (status == nfserr_inval)
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goto out;
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status = nfsd4_map_bcts_dir(&bcts->dir);
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if (status)
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