Return-Path: linux-nfs-owner@vger.kernel.org Received: from mail-gy0-f174.google.com ([209.85.160.174]:44711 "EHLO mail-gy0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S965004Ab2CUNwU (ORCPT ); Wed, 21 Mar 2012 09:52:20 -0400 Received: by ghrr11 with SMTP id r11so921107ghr.19 for ; Wed, 21 Mar 2012 06:52:20 -0700 (PDT) From: Jeff Layton To: bfields@fieldses.org Cc: linux-nfs@vger.kernel.org Subject: [PATCH v10 5/8] nfsd: add a header describing upcall to nfsdcld Date: Wed, 21 Mar 2012 09:52:06 -0400 Message-Id: <1332337929-18580-6-git-send-email-jlayton@redhat.com> In-Reply-To: <1332337929-18580-1-git-send-email-jlayton@redhat.com> References: <1332337929-18580-1-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 | 56 ++++++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 56 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..f14a9ab --- /dev/null +++ b/include/linux/nfsd/cld.h @@ -0,0 +1,56 @@ +/* + * Upcall description for nfsdcld communication + * + * Copyright (c) 2012 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_UPCALL_VERSION 1 + +/* defined by RFC3530 */ +#define NFS4_OPAQUE_LIMIT 1024 + +enum cld_command { + Cld_Create, /* create a record for this cm_id */ + Cld_Remove, /* remove record of this cm_id */ + Cld_Check, /* is this cm_id allowed? */ + Cld_GraceDone, /* grace period is complete */ +}; + +/* 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 */ + int16_t cm_status; /* return code */ + uint32_t cm_xid; /* transaction id */ + union { + int64_t cm_gracetime; /* grace period start time */ + struct cld_name cm_name; + } __attribute__((packed)) cm_u; +} __attribute__((packed)); + +#endif /* !_NFSD_CLD_H */ -- 1.7.7.6