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0ab628d8 JL |
1 | /* |
2 | * Upcall description for nfsdcld communication | |
3 | * | |
4 | * Copyright (c) 2012 Red Hat, Inc. | |
5 | * Author(s): Jeff Layton <jlayton@redhat.com> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
20 | */ | |
21 | ||
22 | #ifndef _NFSD_CLD_H | |
23 | #define _NFSD_CLD_H | |
24 | ||
25 | /* latest upcall version available */ | |
26 | #define CLD_UPCALL_VERSION 1 | |
27 | ||
28 | /* defined by RFC3530 */ | |
29 | #define NFS4_OPAQUE_LIMIT 1024 | |
30 | ||
31 | enum cld_command { | |
32 | Cld_Create, /* create a record for this cm_id */ | |
33 | Cld_Remove, /* remove record of this cm_id */ | |
34 | Cld_Check, /* is this cm_id allowed? */ | |
35 | Cld_GraceDone, /* grace period is complete */ | |
36 | }; | |
37 | ||
38 | /* representation of long-form NFSv4 client ID */ | |
39 | struct cld_name { | |
40 | uint16_t cn_len; /* length of cm_id */ | |
41 | unsigned char cn_id[NFS4_OPAQUE_LIMIT]; /* client-provided */ | |
42 | } __attribute__((packed)); | |
43 | ||
44 | /* message struct for communication with userspace */ | |
45 | struct cld_msg { | |
46 | uint8_t cm_vers; /* upcall version */ | |
47 | uint8_t cm_cmd; /* upcall command */ | |
48 | int16_t cm_status; /* return code */ | |
49 | uint32_t cm_xid; /* transaction id */ | |
50 | union { | |
51 | int64_t cm_gracetime; /* grace period start time */ | |
52 | struct cld_name cm_name; | |
53 | } __attribute__((packed)) cm_u; | |
54 | } __attribute__((packed)); | |
55 | ||
56 | #endif /* !_NFSD_CLD_H */ |