diff options
Diffstat (limited to 'drivers/staging/lustre/include/uapi/linux/lustre/lustre_kernelcomm.h')
| -rw-r--r-- | drivers/staging/lustre/include/uapi/linux/lustre/lustre_kernelcomm.h | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/drivers/staging/lustre/include/uapi/linux/lustre/lustre_kernelcomm.h b/drivers/staging/lustre/include/uapi/linux/lustre/lustre_kernelcomm.h new file mode 100644 index 000000000000..94dadbe8e069 --- /dev/null +++ b/drivers/staging/lustre/include/uapi/linux/lustre/lustre_kernelcomm.h @@ -0,0 +1,94 @@ +/* + * 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_LUSTRE_KERNELCOMM_H__ +#define __UAPI_LUSTRE_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_LUSTRE_KERNELCOMM_H__ */ |