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@xxxxxxxxxx>
---
fs/nfs/nfs4client.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/fs/nfs/nfs4client.c b/fs/nfs/nfs4client.c
index 8d7d08d4f95f..ec8afc43d849 100644
--- a/fs/nfs/nfs4client.c
+++ b/fs/nfs/nfs4client.c
@@ -817,6 +817,12 @@ static int nfs4_set_client(struct nfs_server *server,
goto error;
}
+ /* This client is already set, is there a migration loop? */
+ if (server->nfs_client == clp) {
+ error = -EEXIST;
+ goto error;
+ }
+
/*
* Query for the lease time on clientid setup or renewal
*
--
2.5.5
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