Commit 71dfc5fa authored Apr 28, 2012 by Stanislav Kinsbursky Committed by Trond Myklebust Apr 28, 2012

NFS: get module in idmap PipeFS notifier callback



This is bug fix.
Notifier callback is called from SUNRPC module. So before dereferencing NFS
module we have to make sure, that it's alive.

Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

parent e245d425

fs/nfs/idmap.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -554,12 +554,16 @@ static int rpc_pipefs_event(struct notifier_block *nb, unsigned long event,
		struct nfs_client *clp;
		int error = 0;

		if (!try_module_get(THIS_MODULE))
		return 0;

		while ((clp = nfs_get_client_for_event(sb->s_fs_info, event))) {
		error = __rpc_pipefs_event(clp, event, sb);
		nfs_put_client(clp);
		if (error)
		break;
		}
		module_put(THIS_MODULE);
		return error;
		}