4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.gnu.org/licenses/gpl-2.0.html
23 * Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
26 * Copyright (c) 2013, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
31 * Author: Nathan Rutman <nathan.rutman@sun.com>
33 * Kernel <-> userspace communication routines.
34 * The definitions below are used in the kernel and userspace.
37 #ifndef __UAPI_KERNELCOMM_H__
38 #define __UAPI_KERNELCOMM_H__
40 #include <linux/types.h>
42 /* KUC message header.
43 * All current and future KUC messages should use this header.
44 * To avoid having to include Lustre headers from libcfs, define this here.
48 __u8 kuc_transport; /* Each new Lustre feature should use a different
51 __u16 kuc_msgtype; /* Message type or opcode, transport-specific */
52 __u16 kuc_msglen; /* Including header */
53 } __attribute__((aligned(sizeof(__u64))));
55 #define KUC_CHANGELOG_MSG_MAXSIZE (sizeof(struct kuc_hdr)+CR_MAXSIZE)
57 #define KUC_MAGIC 0x191C /*Lustre9etLinC */
59 /* kuc_msgtype values are defined in each transport */
60 enum kuc_transport_type {
61 KUC_TRANSPORT_GENERIC = 1,
62 KUC_TRANSPORT_HSM = 2,
63 KUC_TRANSPORT_CHANGELOG = 3,
66 enum kuc_generic_message_type {
70 /* KUC Broadcast Groups. This determines which userspace process hears which
71 * messages. Mutliple transports may be used within a group, or multiple
72 * groups may use the same transport. Broadcast
73 * groups need not be used if e.g. a UID is specified instead;
74 * use group 0 to signify unicast.
76 #define KUC_GRP_HSM 0x02
77 #define KUC_GRP_MAX KUC_GRP_HSM
79 #define LK_FLG_STOP 0x01
82 /* kernelcomm control structure, passed from userspace to kernel */
83 struct lustre_kernelcomm {
90 } __attribute__((packed));
92 #endif /* __UAPI_KERNELCOMM_H__ */