| /* |
| * GPL HEADER START |
| * |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 only, |
| * as published by the Free Software Foundation. |
| * |
| * 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 version 2 for more details (a copy is included |
| * in the LICENSE file that accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License |
| * version 2 along with this program; If not, see |
| * http://www.gnu.org/licenses/gpl-2.0.html |
| * |
| * GPL HEADER END |
| */ |
| /* |
| * Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved. |
| * Use is subject to license terms. |
| * |
| * Copyright (c) 2013, Intel Corporation. |
| */ |
| /* |
| * This file is part of Lustre, http://www.lustre.org/ |
| * |
| * Author: Nathan Rutman <nathan.rutman@sun.com> |
| * |
| * Kernel <-> userspace communication routines. |
| * The definitions below are used in the kernel and userspace. |
| */ |
| |
| #ifndef __UAPI_KERNELCOMM_H__ |
| #define __UAPI_KERNELCOMM_H__ |
| |
| #include <linux/types.h> |
| |
| /* KUC message header. |
| * All current and future KUC messages should use this header. |
| * To avoid having to include Lustre headers from libcfs, define this here. |
| */ |
| struct kuc_hdr { |
| __u16 kuc_magic; |
| /* Each new Lustre feature should use a different transport */ |
| __u8 kuc_transport; |
| __u8 kuc_flags; |
| /* Message type or opcode, transport-specific */ |
| __u16 kuc_msgtype; |
| /* Including header */ |
| __u16 kuc_msglen; |
| } __aligned(sizeof(__u64)); |
| |
| #define KUC_CHANGELOG_MSG_MAXSIZE (sizeof(struct kuc_hdr) + CR_MAXSIZE) |
| |
| #define KUC_MAGIC 0x191C /*Lustre9etLinC */ |
| |
| /* kuc_msgtype values are defined in each transport */ |
| enum kuc_transport_type { |
| KUC_TRANSPORT_GENERIC = 1, |
| KUC_TRANSPORT_HSM = 2, |
| KUC_TRANSPORT_CHANGELOG = 3, |
| }; |
| |
| enum kuc_generic_message_type { |
| KUC_MSG_SHUTDOWN = 1, |
| }; |
| |
| /* KUC Broadcast Groups. This determines which userspace process hears which |
| * messages. Mutliple transports may be used within a group, or multiple |
| * groups may use the same transport. Broadcast |
| * groups need not be used if e.g. a UID is specified instead; |
| * use group 0 to signify unicast. |
| */ |
| #define KUC_GRP_HSM 0x02 |
| #define KUC_GRP_MAX KUC_GRP_HSM |
| |
| #define LK_FLG_STOP 0x01 |
| #define LK_NOFD -1U |
| |
| /* kernelcomm control structure, passed from userspace to kernel */ |
| struct lustre_kernelcomm { |
| __u32 lk_wfd; |
| __u32 lk_rfd; |
| __u32 lk_uid; |
| __u32 lk_group; |
| __u32 lk_data; |
| __u32 lk_flags; |
| } __packed; |
| |
| #endif /* __UAPI_KERNELCOMM_H__ */ |
