| /* |
| * Upcall description for nfsdcld communication |
| * |
| * Copyright (c) 2012 Red Hat, Inc. |
| * Author(s): Jeff Layton <jlayton@redhat.com> |
| * |
| * 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 */ |
