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e2be04c7 | 1 | /* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */ |
0ab628d8 JL |
2 | /* |
3 | * Upcall description for nfsdcld communication | |
4 | * | |
5 | * Copyright (c) 2012 Red Hat, Inc. | |
6 | * Author(s): Jeff Layton <jlayton@redhat.com> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
21 | */ | |
22 | ||
23 | #ifndef _NFSD_CLD_H | |
24 | #define _NFSD_CLD_H | |
25 | ||
16719199 DL |
26 | #include <linux/types.h> |
27 | ||
0ab628d8 JL |
28 | /* latest upcall version available */ |
29 | #define CLD_UPCALL_VERSION 1 | |
30 | ||
31 | /* defined by RFC3530 */ | |
32 | #define NFS4_OPAQUE_LIMIT 1024 | |
33 | ||
34 | enum cld_command { | |
35 | Cld_Create, /* create a record for this cm_id */ | |
36 | Cld_Remove, /* remove record of this cm_id */ | |
37 | Cld_Check, /* is this cm_id allowed? */ | |
38 | Cld_GraceDone, /* grace period is complete */ | |
39 | }; | |
40 | ||
41 | /* representation of long-form NFSv4 client ID */ | |
42 | struct cld_name { | |
16719199 | 43 | __u16 cn_len; /* length of cm_id */ |
0ab628d8 JL |
44 | unsigned char cn_id[NFS4_OPAQUE_LIMIT]; /* client-provided */ |
45 | } __attribute__((packed)); | |
46 | ||
47 | /* message struct for communication with userspace */ | |
48 | struct cld_msg { | |
16719199 DL |
49 | __u8 cm_vers; /* upcall version */ |
50 | __u8 cm_cmd; /* upcall command */ | |
51 | __s16 cm_status; /* return code */ | |
52 | __u32 cm_xid; /* transaction id */ | |
0ab628d8 | 53 | union { |
16719199 | 54 | __s64 cm_gracetime; /* grace period start time */ |
0ab628d8 JL |
55 | struct cld_name cm_name; |
56 | } __attribute__((packed)) cm_u; | |
57 | } __attribute__((packed)); | |
58 | ||
59 | #endif /* !_NFSD_CLD_H */ |