Return-Path: linux-nfs-owner@vger.kernel.org Received: from mx1.redhat.com ([209.132.183.28]:8260 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751657Ab1LOSn2 (ORCPT ); Thu, 15 Dec 2011 13:43:28 -0500 Received: from int-mx01.intmail.prod.int.phx2.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id pBFIhSC2007972 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK) for ; Thu, 15 Dec 2011 13:43:28 -0500 Received: from dantu.rdu.redhat.com (dantu.rdu.redhat.com [10.11.228.66]) by int-mx01.intmail.prod.int.phx2.redhat.com (8.13.8/8.13.8) with ESMTP id pBFIhQq8021450 for ; Thu, 15 Dec 2011 13:43:27 -0500 From: Jeff Layton To: linux-nfs@vger.kernel.org Subject: [PATCH v2 4/5] nfsd: add a header describing upcall to nfsdcld Date: Thu, 15 Dec 2011 13:43:25 -0500 Message-Id: <1323974606-16477-5-git-send-email-jlayton@redhat.com> In-Reply-To: <1323974606-16477-1-git-send-email-jlayton@redhat.com> References: <1323974606-16477-1-git-send-email-jlayton@redhat.com> Sender: linux-nfs-owner@vger.kernel.org List-ID: The daemon takes a versioned binary struct. Hopefully this should allow us to revise the struct later if it becomes necessary. Signed-off-by: Jeff Layton --- include/linux/nfsd/cld.h | 57 ++++++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 57 insertions(+), 0 deletions(-) create mode 100644 include/linux/nfsd/cld.h diff --git a/include/linux/nfsd/cld.h b/include/linux/nfsd/cld.h new file mode 100644 index 0000000..d64a7e7 --- /dev/null +++ b/include/linux/nfsd/cld.h @@ -0,0 +1,57 @@ +/* + * fs/nfsd/cld.h - upcall description for nfsdcld communication + * + * Copyright (c) 2011 Red Hat, Inc. + * Author(s): Jeff Layton + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#ifndef _NFSD_CLD_H +#define _NFSD_CLD_H + +/* latest upcall version available */ +#define CLD_MAX_UPCALL_VERSION 1 + +/* defined by RFC3530 */ +#define NFS4_OPAQUE_LIMIT 1024 + +enum cld_command { + Cld_Create, /* create a record for this cm_id */ + Cld_Expire, /* remove record for this cm_id */ + Cld_Allow, /* is this cm_id allowed? */ + Cld_GraceDone, /* grace period is complete */ + Cld_NrToReclaim, /* how many client records need reclaim? */ +}; + +/* representation of long-form NFSv4 client ID */ +struct cld_name { + uint16_t cn_len; /* length of cm_id */ + unsigned char cn_id[NFS4_OPAQUE_LIMIT]; /* client-provided */ +} __attribute__((packed)); + +/* message struct for communication with userspace */ +struct cld_msg { + uint8_t cm_vers; /* upcall version */ + uint8_t cm_cmd; /* upcall command */ + uint32_t cm_xid; /* transaction id */ + int16_t cm_status; /* return code */ + union { + int64_t cm_gracetime; /* grace period start time */ + struct cld_name cm_name; + } __attribute__((packed)) cm_u; +} __attribute__((packed)); + +#endif /* !_NFSD_CLD_H */ -- 1.7.1