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NFS4: Avoid migration loops 

If a server returns itself as a location while migrating, the client may
end up getting stuck attempting to migrate twice to the same server.  Catch
this by checking if the nfs_client found is the same as the existing
client.  For the other two callers to nfs4_set_client, the nfs_client will
always be ERR_PTR(-EINVAL).

Signed-off-by: Benjamin Coddington <bcodding@redhat.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
steinar/wifi_calib_4_9_kernel
Benjamin Coddington 2016-08-30 09:20:32 -04:00 committed by Trond Myklebust
parent 3dc147359e
commit 52442f9b11
1 changed files with 5 additions and 0 deletions
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5
fs/nfs/nfs4client.c
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@ -817,6 +817,11 @@ static int nfs4_set_client(struct nfs_server *server,
goto error;
}
if (server->nfs_client == clp) {
error = -ELOOP;
goto error;
}
/*
* Query for the lease time on clientid setup or renewal
*