NFS4: Avoid migration loops
authorBenjamin Coddington <bcodding@redhat.com>
Tue, 30 Aug 2016 13:20:32 +0000 (09:20 -0400)
committerTrond Myklebust <trond.myklebust@primarydata.com>
Tue, 30 Aug 2016 13:26:32 +0000 (09:26 -0400)
commit52442f9b11b7e5d4a38d99143011831fd171f8d9
treee176efeec7f9baa9e9d30429cab9f85ae838f7a1
parent3dc147359e3dcdf0648f1e2c11f62cfae3160df0
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>
fs/nfs/nfs4client.c