Commit 71dfc5fa authored by Stanislav Kinsbursky's avatar Stanislav Kinsbursky Committed by Trond Myklebust
Browse files

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: default avatarStanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: default avatarTrond 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;

}