From df52699e4fcefe30ebe4f1db48bd161254a0b102 Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Mon, 9 Mar 2015 14:48:32 -0400 Subject: NFSv4.1: Don't cache deviceids that have no notifications The spec says that once all layouts that reference a given deviceid have been returned, then we are only allowed to continue to cache the deviceid if the metadata server supports notifications. Signed-off-by: Trond Myklebust --- fs/nfs/nfs4proc.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'fs/nfs/nfs4proc.c') diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c index ba8b2b5e98a1..9ff8c63c9cac 100644 --- a/fs/nfs/nfs4proc.c +++ b/fs/nfs/nfs4proc.c @@ -7962,6 +7962,8 @@ _nfs4_proc_getdeviceinfo(struct nfs_server *server, status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); if (res.notification & ~args.notify_types) dprintk("%s: unsupported notification\n", __func__); + if (res.notification != args.notify_types) + pdev->nocache = 1; dprintk("<-- %s status=%d\n", __func__, status); -- cgit v1.2.3