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/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-

 * vim:expandtab:shiftwidth=8:tabstop=8:

 *

 *  Copyright (C) 2001, 2002 Cluster File Systems, Inc.

 *  Copyright (C) 2001 Tacit Networks, Inc.

 *

 *   This file is part of InterMezzo, http://www.inter-mezzo.org.

 *

 *   InterMezzo is free software; you can redistribute it and/or

 *   modify it under the terms of version 2 of the GNU General Public

 *   License as published by the Free Software Foundation.

 *

 *   InterMezzo 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 for more details.

 *

 *   You should have received a copy of the GNU General Public License

 *   along with InterMezzo; if not, write to the Free Software

 *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

 */

#ifndef __INTERMEZZO_IDL_H__

#define __INTERMEZZO_IDL_H__

#include <linux/ioctl.h>

#include <linux/types.h>

/* this file contains all data structures used in InterMezzo's interfaces:

 * - upcalls

 * - ioctl's

 * - KML records

 * - RCVD records

 * - rpc's

 */

/* UPCALL */

#define INTERMEZZO_MINOR 248   

#define IZO_UPC_VERSION 0x00010002

#define IZO_UPC_PERMIT        1

#define IZO_UPC_CONNECT       2

#define IZO_UPC_GO_FETCH_KML  3

#define IZO_UPC_OPEN          4

#define IZO_UPC_REVOKE_PERMIT 5

#define IZO_UPC_KML           6

#define IZO_UPC_BACKFETCH     7

#define IZO_UPC_KML_TRUNC     8

#define IZO_UPC_SET_KMLSIZE   9

#define IZO_UPC_BRANCH_UNDO   10

#define IZO_UPC_BRANCH_REDO   11

#define IZO_UPC_GET_FILEID    12

#define IZO_UPC_CLIENT_MAKE_BRANCH    13

#define IZO_UPC_SERVER_MAKE_BRANCH    14

#define IZO_UPC_REPSTATUS    15

#define IZO_UPC_LARGEST_OPCODE 15

struct izo_upcall_hdr {

        __u32 u_len;

        __u32 u_version;

        __u32 u_opc;

        __u32 u_uniq;

        __u32 u_pid;

        __u32 u_uid;

        __u32 u_pathlen;

        __u32 u_fsetlen;

        __u64 u_offset;

        __u64 u_length;

        __u32 u_first_recno;

        __u32 u_last_recno;

        __u32 u_async;

        __u32 u_reclen;

        __u8  u_uuid[16];

};

/* This structure _must_ sit at the beginning of the buffer */

struct izo_upcall_resp {

        __u32 opcode;

        __u32 unique;

        __u32 result;

};

/* IOCTL */

#define IZO_IOCTL_VERSION 0x00010003

/* maximum size supported for ioc_pbuf1 */

#define KML_MAX_BUF (64*1024)

struct izo_ioctl_hdr {

        __u32  ioc_len;

        __u32  ioc_version;

};

struct izo_ioctl_data {

        __u32 ioc_len;

        __u32 ioc_version;

        __u32 ioc_izodev;

        __u32 ioc_kmlrecno;

        __u64 ioc_kmlsize;

        __u32 ioc_flags;

        __s32 ioc_inofd;

        __u64 ioc_ino;

        __u64 ioc_generation;

        __u32 ioc_mark_what;

        __u32 ioc_and_flag;

        __u32 ioc_or_flag;

        __u32 ioc_dev;

        __u32 ioc_offset;

        __u32 ioc_slot;

        __u64 ioc_uid;

        __u8  ioc_uuid[16];

        __u32 ioc_inllen1;   /* path */

        char *ioc_inlbuf1;

        __u32 ioc_inllen2;   /* fileset */

        char *ioc_inlbuf2;

        __u32 ioc_plen1;     /* buffers in user space (KML) */

        char *ioc_pbuf1;

        __u32 ioc_plen2;     /* buffers in user space (KML) */

        char *ioc_pbuf2;

        char  ioc_bulk[0];

};

#define IZO_IOC_DEVICE          _IOW ('p',0x50, void *)

#define IZO_IOC_REINTKML        _IOW ('p',0x51, void *)

#define IZO_IOC_GET_RCVD        _IOW ('p',0x52, void *)

#define IZO_IOC_SET_IOCTL_UID   _IOW ('p',0x53, void *)

#define IZO_IOC_GET_KML_SIZE    _IOW ('p',0x54, void *)

#define IZO_IOC_PURGE_FILE_DATA _IOW ('p',0x55, void *)

#define IZO_IOC_CONNECT         _IOW ('p',0x56, void *)

#define IZO_IOC_GO_FETCH_KML    _IOW ('p',0x57, void *)

#define IZO_IOC_MARK            _IOW ('p',0x58, void *)

#define IZO_IOC_CLEAR_FSET      _IOW ('p',0x59, void *)

#define IZO_IOC_CLEAR_ALL_FSETS _IOW ('p',0x60, void *)

#define IZO_IOC_SET_FSET        _IOW ('p',0x61, void *)

#define IZO_IOC_REVOKE_PERMIT   _IOW ('p',0x62, void *)

#define IZO_IOC_SET_KMLSIZE     _IOW ('p',0x63, void *)

#define IZO_IOC_CLIENT_MAKE_BRANCH _IOW ('p',0x64, void *)

#define IZO_IOC_SERVER_MAKE_BRANCH _IOW ('p',0x65, void *)

#define IZO_IOC_BRANCH_UNDO    _IOW ('p',0x66, void *)

#define IZO_IOC_BRANCH_REDO    _IOW ('p',0x67, void *)

#define IZO_IOC_SET_PID        _IOW ('p',0x68, void *)

#define IZO_IOC_SET_CHANNEL    _IOW ('p',0x69, void *)

#define IZO_IOC_GET_CHANNEL    _IOW ('p',0x70, void *)

#define IZO_IOC_GET_FILEID    _IOW ('p',0x71, void *)

#define IZO_IOC_ADJUST_LML    _IOW ('p',0x72, void *)

#define IZO_IOC_SET_FILEID    _IOW ('p',0x73, void *)

#define IZO_IOC_REPSTATUS    _IOW ('p',0x74, void *)

/* marking flags for fsets */

#define FSET_CLIENT_RO        0x00000001

#define FSET_LENTO_RO         0x00000002

#define FSET_HASPERMIT        0x00000004 /* we have a permit to WB */

#define FSET_INSYNC           0x00000008 /* this fileset is in sync */

#define FSET_PERMIT_WAITING   0x00000010 /* Lento is waiting for permit */

#define FSET_STEAL_PERMIT     0x00000020 /* take permit if Lento is dead */

#define FSET_JCLOSE_ON_WRITE  0x00000040 /* Journal closes on writes */

#define FSET_DATA_ON_DEMAND   0x00000080 /* update data on file_open() */

#define FSET_PERMIT_EXCLUSIVE 0x00000100 /* only one permitholder allowed */

#define FSET_HAS_BRANCHES     0x00000200 /* this fileset contains branches */

#define FSET_IS_BRANCH        0x00000400 /* this fileset is a branch */

#define FSET_FLAT_BRANCH      0x00000800 /* this fileset is ROOT with branches */

/* what to mark indicator (ioctl parameter) */

#define MARK_DENTRY   101

#define MARK_FSET     102

#define MARK_CACHE    103

#define MARK_GETFL    104

/* KML */

#define KML_MAJOR_VERSION 0x00010000

#define KML_MINOR_VERSION 0x00000002

#define KML_OPCODE_NOOP          0

#define KML_OPCODE_CREATE        1

#define KML_OPCODE_MKDIR         2

#define KML_OPCODE_UNLINK        3

#define KML_OPCODE_RMDIR         4

#define KML_OPCODE_CLOSE         5

#define KML_OPCODE_SYMLINK       6

#define KML_OPCODE_RENAME        7

#define KML_OPCODE_SETATTR       8

#define KML_OPCODE_LINK          9

#define KML_OPCODE_OPEN          10

#define KML_OPCODE_MKNOD         11

#define KML_OPCODE_WRITE         12

#define KML_OPCODE_RELEASE       13

#define KML_OPCODE_TRUNC         14

#define KML_OPCODE_SETEXTATTR    15

#define KML_OPCODE_DELEXTATTR    16

#define KML_OPCODE_KML_TRUNC     17

#define KML_OPCODE_GET_FILEID    18

#define KML_OPCODE_NUM           19

/* new stuff */

struct presto_version {

        __u64 pv_mtime;

        __u64 pv_ctime;

        __u64 pv_size;

};

struct kml_prefix_hdr {

        __u32                    len;

        __u32                    version;

        __u32                    pid;

        __u32                    auid;

        __u32                    fsuid;

        __u32                    fsgid;

        __u32                    opcode;

        __u32                    ngroups;

};

struct kml_prefix {

        struct kml_prefix_hdr    *hdr;

        __u32                    *groups;

};

struct kml_suffix {

        __u32                    prevrec;

        __u32                    recno;

        __u32                    time;

        __u32                    len;

};

struct kml_rec {

        char                   *buf;

        struct kml_prefix       prefix;

        __u64                   offset;

        char                   *path;

        int                     pathlen;

        char                   *name;

        int                     namelen;

        char                   *target;

        int                     targetlen;

        struct presto_version  *old_objectv;

        struct presto_version  *new_objectv;

        struct presto_version  *old_parentv;

        struct presto_version  *new_parentv;

        struct presto_version  *old_targetv;

        struct presto_version  *new_targetv;

        __u32                   valid;

        __u32                   mode;

        __u32                   uid;

        __u32                   gid;

        __u64                   size;

        __u32                   mtime;

        __u32                   ctime;

        __u32                   flags;

        __u32                   ino;

        __u32                   rdev;

        __u32                   major;

        __u32                   minor;

        __u32                   generation;

        __u32                   old_mode;

        __u32                   old_rdev;

        __u64                   old_uid;

        __u64                   old_gid;

        char                   *old_target;

        int                     old_targetlen;

        struct kml_suffix      *suffix;

};

/* RCVD */

/* izo_rcvd_rec fills the .intermezzo/fset/last_rcvd file and provides data about

 * our view of reintegration offsets for a given peer.

 *

 * The only exception is the last_rcvd record which has a UUID consisting of all

 * zeroes; this record's lr_local_offset field is the logical byte offset of our

 * KML, which is updated when KML truncation takes place.  All other fields are

 * reserved. */

/* XXX - document how clean shutdowns are recorded */

struct izo_rcvd_rec {

        __u8    lr_uuid[16];       /* which peer? */

        __u64   lr_remote_recno;   /* last confirmed remote recno  */

        __u64   lr_remote_offset;  /* last confirmed remote offset */

        __u64   lr_local_recno;    /* last locally reinted recno   */

        __u64   lr_local_offset;   /* last locally reinted offset  */

        __u64   lr_last_ctime;     /* the largest ctime that has reintegrated */

};

/* Cache purge database

 *

 * Each DB entry is this structure followed by the path name, no trailing NUL. */

struct izo_purge_entry {

        __u64 p_atime;

        __u32 p_pathlen;

};

/* RPC */

#endif