/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
 * vim:expandtab:shiftwidth=8:tabstop=8:
 *
 *  Copyright (C) 2001, 2002 Cluster File Systems, Inc.
 *
 *   This file is part of Lustre, http://www.lustre.org.
 *
 *   Lustre 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.
 *
 *   Lustre 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 Lustre; if not, write to the Free Software
 *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 */

#ifndef __LINUX_CLASS_OBD_H
#define __LINUX_CLASS_OBD_H

#ifndef __KERNEL__
# include <stdint.h>
# define __KERNEL__
# include <linux/list.h>
# undef __KERNEL__
#else 
#include <asm/segment.h>
#include <asm/uaccess.h>
#include <linux/types.h>
#include <linux/fs.h>
#include <linux/time.h>

#include <linux/obd_support.h>
#include <linux/obd.h>
#include <linux/lustre_lib.h>
#include <linux/lustre_idl.h>
#endif

/*
 *  ======== OBD Device Declarations ===========
 */
#define MAX_OBD_DEVICES 32
extern struct obd_device obd_dev[MAX_OBD_DEVICES];

#define OBD_ATTACHED 0x1
#define OBD_SET_UP   0x2

extern struct proc_dir_entry *
proc_lustre_register_obd_device(struct obd_device *obd);
extern void proc_lustre_release_obd_device(struct obd_device *obd);
extern void proc_lustre_remove_obd_entry(const char* name,
                                         struct obd_device *obd);

/*
 *  ======== OBD Operations Declarations ===========
 */

#define OBD_BRW_READ    1
#define OBD_BRW_WRITE   2
#define OBD_BRW_RWMASK  (OBD_BRW_READ | OBD_BRW_WRITE)
#define OBD_BRW_CREATE  4

#ifdef __KERNEL__
struct obd_request {
        struct obdo *oa;
        struct obd_conn *conn;
        __u32 plen1;
        char *pbuf1;
};

static inline int obd_check_conn(struct obd_conn *conn) 
{
        struct obd_device *obd;
        if (!conn) {
                CERROR("obd_check_conn: NULL conn\n");
                RETURN(-ENOTCONN);
        }
        obd = conn->oc_dev;
        if (!obd) {
                CERROR("obd_check_conn: NULL obd\n");
                RETURN(-ENODEV);
        }

        if (!obd->obd_flags & OBD_ATTACHED ) {
                CERROR("obd_check_conn: obd %d not attached\n", obd->obd_minor);
                RETURN(-ENODEV);
        }

        if (!obd->obd_flags & OBD_SET_UP) {
                CERROR("obd_check_conn: obd %d not setup\n", obd->obd_minor); 
                RETURN(-ENODEV);
        }

        if (!obd->obd_type) {
                CERROR("obd_check_conn: obd %d not typed\n", obd->obd_minor);
                RETURN(-ENODEV);
        }

        if (!obd->obd_type->typ_ops) {
                CERROR("obd_check_conn: obd %d no operations\n",
                       obd->obd_minor);
                RETURN(-EOPNOTSUPP);
        }
        return 0;
}

#define OBT(dev)        (dev)->obd_type
#define OBP(dev,op)     (dev)->obd_type->typ_ops->o_ ## op

#define OBD_CHECK_SETUP(conn)                                   \
do {                                                            \
        if (!(conn)) {                                          \
                CERROR("NULL connection\n");                    \
                RETURN(-EINVAL);                                \
        }                                                       \
                                                                \
        if (!((conn)->oc_dev)) {                                \
                CERROR("NULL device\n");                        \
                RETURN(-EINVAL);                                \
        }                                                       \
                                                                \
        if ( !((conn)->oc_dev->obd_flags & OBD_SET_UP) ) {      \
                CERROR("Device %d not setup\n",                 \
                       (conn)->oc_dev->obd_minor);              \
                RETURN(-EINVAL);                                \
        }                                                       \
} while (0)

#define OBD_CHECK_OP(conn,op)                                   \
do {                                                            \
        int rc = obd_check_conn(conn);                          \
        if (rc) {                                               \
                CERROR("obd: error in operation: " #op "\n");   \
                RETURN(rc);                                     \
        }                                                       \
        if (!OBP(conn->oc_dev,op)) {                            \
                CERROR("obd_" #op ": dev %d no operation\n",    \
                       conn->oc_dev->obd_minor);                \
                RETURN(-EOPNOTSUPP);                            \
        }                                                       \
} while (0)

static inline int obd_get_info(struct obd_conn *conn, obd_count keylen,
                               void *key, obd_count *vallen, void **val)
{
        int rc;
        OBD_CHECK_SETUP(conn);
        OBD_CHECK_OP(conn,get_info);

        rc = OBP(conn->oc_dev, get_info)(conn, keylen, key, vallen, val);
        RETURN(rc);
}

static inline int obd_set_info(struct obd_conn *conn, obd_count keylen,
                               void *key, obd_count vallen, void *val)
{
        int rc;
        OBD_CHECK_SETUP(conn);
        OBD_CHECK_OP(conn,set_info);

        rc = OBP(conn->oc_dev, set_info)(conn, keylen, key, vallen, val);
        RETURN(rc);
}

static inline int obd_setup(struct obd_device *obd, int datalen, void *data)
{
        struct obd_conn conn;
        int rc;
        conn.oc_dev = obd;

        OBD_CHECK_OP((&conn),setup);

        rc = OBP(conn.oc_dev, setup)(obd, datalen, data);
        RETURN(rc);
}

static inline int obd_cleanup(struct obd_device *obd)
{
        struct obd_conn conn;
        int rc;
        conn.oc_dev = obd;

        OBD_CHECK_SETUP(&conn);
        OBD_CHECK_OP((&conn),cleanup);

        rc = OBP(conn.oc_dev, cleanup)(obd);
        RETURN(rc);
}

static inline int obd_create(struct obd_conn *conn, struct obdo *obdo)
{
        int rc;
        OBD_CHECK_SETUP(conn);
        OBD_CHECK_OP(conn,create);

        rc = OBP(conn->oc_dev, create)(conn, obdo);
        RETURN(rc);
}

static inline int obd_destroy(struct obd_conn *conn, struct obdo *obdo)
{
        int rc;
        OBD_CHECK_SETUP(conn);
        OBD_CHECK_OP(conn,destroy);

        rc = OBP(conn->oc_dev, destroy)(conn, obdo);
        RETURN(rc);
}

static inline int obd_getattr(struct obd_conn *conn, struct obdo *obdo)
{
        int rc;
        OBD_CHECK_SETUP(conn);
        OBD_CHECK_OP(conn,getattr);

        rc = OBP(conn->oc_dev, getattr)(conn, obdo);
        RETURN(rc);
}

static inline int obd_close(struct obd_conn *conn, struct obdo *obdo)
{
        int rc;
        OBD_CHECK_SETUP(conn);
        OBD_CHECK_OP(conn,close);

        rc = OBP(conn->oc_dev, close)(conn, obdo);
        RETURN(rc);
}
static inline int obd_open(struct obd_conn *conn, struct obdo *obdo)
{
        int rc;
        OBD_CHECK_SETUP(conn);
        OBD_CHECK_OP(conn,open);

        rc = OBP(conn->oc_dev, open) (conn, obdo);
        RETURN(rc);
}

static inline int obd_setattr(struct obd_conn *conn, struct obdo *obdo)
{
        int rc;
        OBD_CHECK_SETUP(conn);
        OBD_CHECK_OP(conn,setattr);

        rc = OBP(conn->oc_dev, setattr)(conn, obdo);
        RETURN(rc);
}

static inline int obd_connect(struct obd_conn *conn)
{
        int rc;
        OBD_CHECK_SETUP(conn);
        OBD_CHECK_OP(conn,connect);

        rc = OBP(conn->oc_dev, connect)(conn);
        RETURN(rc);
}

static inline int obd_disconnect(struct obd_conn *conn)
{
        int rc;
        OBD_CHECK_SETUP(conn);
        OBD_CHECK_OP(conn,disconnect);

        rc = OBP(conn->oc_dev, disconnect)(conn);
        RETURN(rc);
}

static inline int obd_statfs(struct obd_conn *conn, struct statfs *buf)
{
        int rc;
        OBD_CHECK_SETUP(conn);
        OBD_CHECK_OP(conn,statfs);

        rc = OBP(conn->oc_dev, statfs)(conn, buf);
        RETURN(rc);
}

static inline int obd_punch(struct obd_conn *conn, struct obdo *tgt,
                            obd_size count, obd_off offset)
{
        int rc;
        OBD_CHECK_SETUP(conn);
        OBD_CHECK_OP(conn,punch);

        rc = OBP(conn->oc_dev, punch)(conn, tgt, count, offset);
        RETURN(rc);
}

static inline int obd_brw(int cmd, struct obd_conn *conn, obd_count num_oa,
                          struct obdo **oa, obd_count *oa_bufs,
                          struct page **buf, obd_size *count, obd_off *offset,
                          obd_flag *flags, void *callback)
{
        int rc;
        OBD_CHECK_SETUP(conn);
        OBD_CHECK_OP(conn,brw);

        if (!(cmd & OBD_BRW_RWMASK)) {
                CERROR("obd_brw: cmd must be OBD_BRW_READ or OBD_BRW_WRITE\n");
                LBUG();
        }

        rc = OBP(conn->oc_dev, brw)(cmd, conn, num_oa, oa, oa_bufs, buf,
                                    count, offset, flags, callback);
        RETURN(rc);
}

static inline int obd_preprw(int cmd, struct obd_conn *conn,
                             int objcount, struct obd_ioobj *obj,
                             int niocount, struct niobuf_remote *remote,
                             struct niobuf_local *local, void **desc_private)
{
        int rc;
        OBD_CHECK_SETUP(conn);
        OBD_CHECK_OP(conn, preprw);

        rc = OBP(conn->oc_dev, preprw)(cmd, conn, objcount, obj, niocount,
                                       remote, local, desc_private);
        RETURN(rc);
}

static inline int obd_commitrw(int cmd, struct obd_conn *conn,
                               int objcount, struct obd_ioobj *obj,
                               int niocount, struct niobuf_local *local,
                               void *desc_private)
{
        int rc;
        OBD_CHECK_SETUP(conn);
        OBD_CHECK_OP(conn, commitrw);

        rc = OBP(conn->oc_dev, commitrw)(cmd, conn, objcount, obj, niocount,
                                         local, desc_private);
        RETURN(rc);
}

static inline int obd_iocontrol(int cmd, struct obd_conn *conn,
                                int len, void *karg, void *uarg)
{
        int rc;
        OBD_CHECK_SETUP(conn);
        OBD_CHECK_OP(conn, iocontrol);

        rc = OBP(conn->oc_dev, iocontrol)(cmd, conn, len, karg, uarg);
        RETURN(rc);
}

static inline int obd_enqueue(struct obd_conn *conn,
                              struct lustre_handle *parent_lock, __u64 *res_id,
                              __u32 type, void *cookie, int cookielen,
                              __u32 mode, int *flags, void *cb, void *data,
                              int datalen, struct lustre_handle *lockh)
{
        int rc;
        OBD_CHECK_SETUP(conn);
        OBD_CHECK_OP(conn, enqueue);

        rc = OBP(conn->oc_dev, enqueue)(conn, parent_lock, res_id, type,
                                        cookie, cookielen, mode, flags, cb,
                                        data, datalen, lockh);
        RETURN(rc);
}

static inline int obd_cancel(struct obd_conn *conn, __u32 mode,
                             struct lustre_handle *lockh)
{
        int rc;
        OBD_CHECK_SETUP(conn);
        OBD_CHECK_OP(conn, cancel);
        
        rc = OBP(conn->oc_dev, cancel)(conn, mode, lockh);
        RETURN(rc);
}

#endif 

/*
 *  ======== OBD Metadata Support  ===========
 */

extern int obd_init_obdo_cache(void);
extern void obd_cleanup_obdo_cache(void);


static inline int obdo_has_inline(struct obdo *obdo)
{
        return (obdo->o_valid & OBD_MD_FLINLINE &&
                obdo->o_obdflags & OBD_FL_INLINEDATA);
};

static inline int obdo_has_obdmd(struct obdo *obdo)
{
        return (obdo->o_valid & OBD_MD_FLOBDMD &&
                obdo->o_obdflags & OBD_FL_OBDMDEXISTS);
};

#ifdef __KERNEL__
/* support routines */
extern kmem_cache_t *obdo_cachep;

static __inline__ struct obdo *obdo_alloc(void)
{
        struct obdo *oa = NULL;

        oa = kmem_cache_alloc(obdo_cachep, SLAB_KERNEL);
        if (oa == NULL)
                LBUG();
        memset(oa, 0, sizeof (*oa));

        return oa;
}

static __inline__ void obdo_free(struct obdo *oa)
{
        if (!oa)
                return;
        kmem_cache_free(obdo_cachep, oa);
}

static __inline__ struct obdo *obdo_fromid(struct obd_conn *conn, obd_id id,
                                           obd_mode mode, obd_flag valid)
{
        struct obdo *oa;
        int err;

        ENTRY;
        oa = obdo_alloc();
        if ( !oa ) {
                RETURN(ERR_PTR(-ENOMEM));
        }

        oa->o_id = id;
        oa->o_mode = mode;
        oa->o_valid = valid;
        if ((err = OBP(conn->oc_dev, getattr)(conn, oa))) {
                obdo_free(oa);
                RETURN(ERR_PTR(err));
        }
        RETURN(oa);
}

static inline void obdo_from_iattr(struct obdo *oa, struct iattr *attr)
{
        unsigned int ia_valid = attr->ia_valid;

        if (ia_valid & ATTR_ATIME) {
                oa->o_atime = attr->ia_atime;
                oa->o_valid |= OBD_MD_FLATIME;
        }
        if (ia_valid & ATTR_MTIME) {
                oa->o_mtime = attr->ia_mtime;
                oa->o_valid |= OBD_MD_FLMTIME;
        }
        if (ia_valid & ATTR_CTIME) {
                oa->o_ctime = attr->ia_ctime;
                oa->o_valid |= OBD_MD_FLCTIME;
        }
        if (ia_valid & ATTR_SIZE) {
                oa->o_size = attr->ia_size;
                oa->o_valid |= OBD_MD_FLSIZE;
        }
        if (ia_valid & ATTR_MODE) {
                oa->o_mode = attr->ia_mode;
                oa->o_valid |= OBD_MD_FLMODE;
                if (!in_group_p(oa->o_gid) && !capable(CAP_FSETID))
                        oa->o_mode &= ~S_ISGID;
        }
        if (ia_valid & ATTR_UID)
        {
                oa->o_uid = attr->ia_uid;
                oa->o_valid |= OBD_MD_FLUID;
        }
        if (ia_valid & ATTR_GID) {
                oa->o_gid = attr->ia_gid;
                oa->o_valid |= OBD_MD_FLGID;
        }
}


static inline void iattr_from_obdo(struct iattr *attr, struct obdo *oa)
{
        unsigned int ia_valid = oa->o_valid;
        
        memset(attr, 0, sizeof(*attr));
        if (ia_valid & OBD_MD_FLATIME) {
                attr->ia_atime = oa->o_atime;
                attr->ia_valid |= ATTR_ATIME;
        }
        if (ia_valid & OBD_MD_FLMTIME) {
                attr->ia_mtime = oa->o_mtime;
                attr->ia_valid |= ATTR_MTIME;
        }
        if (ia_valid & OBD_MD_FLCTIME) {
                attr->ia_ctime = oa->o_ctime;
                attr->ia_valid |= ATTR_CTIME;
        }
        if (ia_valid & OBD_MD_FLSIZE) {
                attr->ia_size = oa->o_size;
                attr->ia_valid |= ATTR_SIZE;
        }
        if (ia_valid & OBD_MD_FLMODE) {
                attr->ia_mode = oa->o_mode;
                attr->ia_valid |= ATTR_MODE;
                if (!in_group_p(oa->o_gid) && !capable(CAP_FSETID))
                        attr->ia_mode &= ~S_ISGID;
        }
        if (ia_valid & OBD_MD_FLUID)
        {
                attr->ia_uid = oa->o_uid;
                attr->ia_valid |= ATTR_UID;
        }
        if (ia_valid & OBD_MD_FLGID) {
                attr->ia_gid = oa->o_gid;
                attr->ia_valid |= ATTR_GID;
        }
}


/* WARNING: the file systems must take care not to tinker with
   attributes they don't manage (such as blocks). */

static __inline__ void obdo_from_inode(struct obdo *dst, struct inode *src)
{
        if ( dst->o_valid & OBD_MD_FLID )
                dst->o_id = src->i_ino;
        if ( dst->o_valid & OBD_MD_FLATIME )
                dst->o_atime = src->i_atime;
        if ( dst->o_valid & OBD_MD_FLMTIME )
                dst->o_mtime = src->i_mtime;
        if ( dst->o_valid & OBD_MD_FLCTIME )
                dst->o_ctime = src->i_ctime;
        if ( dst->o_valid & OBD_MD_FLSIZE )
                dst->o_size = src->i_size;
        if ( dst->o_valid & OBD_MD_FLBLOCKS )   /* allocation of space */
                dst->o_blocks = src->i_blocks;
        if ( dst->o_valid & OBD_MD_FLBLKSZ )
                dst->o_blksize = src->i_blksize;
        if ( dst->o_valid & OBD_MD_FLMODE )
                dst->o_mode = src->i_mode;
        if ( dst->o_valid & OBD_MD_FLUID )
                dst->o_uid = src->i_uid;
        if ( dst->o_valid & OBD_MD_FLGID )
                dst->o_gid = src->i_gid;
        if ( dst->o_valid & OBD_MD_FLFLAGS )
                dst->o_flags = src->i_flags;
        if ( dst->o_valid & OBD_MD_FLNLINK )
                dst->o_nlink = src->i_nlink;
        if ( dst->o_valid & OBD_MD_FLGENER ) 
                dst->o_generation = src->i_generation;
}

static __inline__ void obdo_to_inode(struct inode *dst, struct obdo *src)
{

        if ( src->o_valid & OBD_MD_FLID )
                dst->i_ino = src->o_id;
        if ( src->o_valid & OBD_MD_FLATIME ) 
                dst->i_atime = src->o_atime;
        if ( src->o_valid & OBD_MD_FLMTIME ) 
                dst->i_mtime = src->o_mtime;
        if ( src->o_valid & OBD_MD_FLCTIME ) 
                dst->i_ctime = src->o_ctime;
        if ( src->o_valid & OBD_MD_FLSIZE ) 
                dst->i_size = src->o_size;
        if ( src->o_valid & OBD_MD_FLBLOCKS ) /* allocation of space */
                dst->i_blocks = src->o_blocks;
        if ( src->o_valid & OBD_MD_FLBLKSZ )
                dst->i_blksize = src->o_blksize;
        if ( src->o_valid & OBD_MD_FLMODE ) 
                dst->i_mode = src->o_mode;
        if ( src->o_valid & OBD_MD_FLUID ) 
                dst->i_uid = src->o_uid;
        if ( src->o_valid & OBD_MD_FLGID ) 
                dst->i_gid = src->o_gid;
        if ( src->o_valid & OBD_MD_FLFLAGS ) 
                dst->i_flags = src->o_flags;
        if ( src->o_valid & OBD_MD_FLNLINK )
                dst->i_nlink = src->o_nlink;
        if ( src->o_valid & OBD_MD_FLGENER )
                dst->i_generation = src->o_generation;
}

#endif 

static __inline__ void obdo_cpy_md(struct obdo *dst, struct obdo *src)
{
#ifdef __KERNEL__
        CDEBUG(D_INODE, "src obdo %Ld valid 0x%x, dst obdo %Ld\n",
               (unsigned long long)src->o_id, src->o_valid,
               (unsigned long long)dst->o_id);
#endif
        if ( src->o_valid & OBD_MD_FLATIME ) 
                dst->o_atime = src->o_atime;
        if ( src->o_valid & OBD_MD_FLMTIME ) 
                dst->o_mtime = src->o_mtime;
        if ( src->o_valid & OBD_MD_FLCTIME ) 
                dst->o_ctime = src->o_ctime;
        if ( src->o_valid & OBD_MD_FLSIZE ) 
                dst->o_size = src->o_size;
        if ( src->o_valid & OBD_MD_FLBLOCKS ) /* allocation of space */
                dst->o_blocks = src->o_blocks;
        if ( src->o_valid & OBD_MD_FLBLKSZ )
                dst->o_blksize = src->o_blksize;
        if ( src->o_valid & OBD_MD_FLMODE ) 
                dst->o_mode = src->o_mode;
        if ( src->o_valid & OBD_MD_FLUID ) 
                dst->o_uid = src->o_uid;
        if ( src->o_valid & OBD_MD_FLGID ) 
                dst->o_gid = src->o_gid;
        if ( src->o_valid & OBD_MD_FLFLAGS ) 
                dst->o_flags = src->o_flags;
        /*
        if ( src->o_valid & OBD_MD_FLOBDFLG ) 
                dst->o_obdflags = src->o_obdflags;
        */
        if ( src->o_valid & OBD_MD_FLNLINK ) 
                dst->o_nlink = src->o_nlink;
        if ( src->o_valid & OBD_MD_FLGENER ) 
                dst->o_generation = src->o_generation;
        if ( src->o_valid & OBD_MD_FLINLINE &&
             src->o_obdflags & OBD_FL_INLINEDATA) {
                memcpy(dst->o_inline, src->o_inline, sizeof(src->o_inline));
                dst->o_obdflags |= OBD_FL_INLINEDATA;
        }
        if ( src->o_valid & OBD_MD_FLOBDMD &&
             src->o_obdflags & OBD_FL_OBDMDEXISTS) {
                memcpy(dst->o_obdmd, src->o_obdmd, sizeof(src->o_obdmd));
                dst->o_obdflags |= OBD_FL_OBDMDEXISTS;
        }

        dst->o_valid |= src->o_valid;
}


/* returns FALSE if comparison (by flags) is same, TRUE if changed */
static __inline__ int obdo_cmp_md(struct obdo *dst, struct obdo *src,
                                  obd_flag compare)
{
        int res = 0;

        if ( compare & OBD_MD_FLATIME )
                res = (res || (dst->o_atime != src->o_atime));
        if ( compare & OBD_MD_FLMTIME )
                res = (res || (dst->o_mtime != src->o_mtime));
        if ( compare & OBD_MD_FLCTIME )
                res = (res || (dst->o_ctime != src->o_ctime));
        if ( compare & OBD_MD_FLSIZE )
                res = (res || (dst->o_size != src->o_size));
        if ( compare & OBD_MD_FLBLOCKS ) /* allocation of space */
                res = (res || (dst->o_blocks != src->o_blocks));
        if ( compare & OBD_MD_FLBLKSZ )
                res = (res || (dst->o_blksize != src->o_blksize));
        if ( compare & OBD_MD_FLMODE )
                res = (res || (dst->o_mode != src->o_mode));
        if ( compare & OBD_MD_FLUID )
                res = (res || (dst->o_uid != src->o_uid));
        if ( compare & OBD_MD_FLGID )
                res = (res || (dst->o_gid != src->o_gid));
        if ( compare & OBD_MD_FLFLAGS ) 
                res = (res || (dst->o_flags != src->o_flags));
        if ( compare & OBD_MD_FLNLINK )
                res = (res || (dst->o_nlink != src->o_nlink));
        if ( compare & OBD_MD_FLGENER )
                res = (res || (dst->o_generation != src->o_generation));
        /* XXX Don't know if thses should be included here - wasn't previously
        if ( compare & OBD_MD_FLINLINE )
                res = (res || memcmp(dst->o_inline, src->o_inline));
        if ( compare & OBD_MD_FLOBDMD )
                res = (res || memcmp(dst->o_obdmd, src->o_obdmd));
        */
        return res;
}


#ifdef __KERNEL__
int obd_register_type(struct obd_ops *ops, char *nm);
int obd_unregister_type(char *nm);
int obd_class_name2dev(char *name);

struct obd_client {
        struct list_head cli_chain;
        struct obd_device *cli_obd;
        unsigned int cli_id;
        unsigned long cli_prealloc_quota;
        struct list_head cli_prealloc_inodes;
};


struct obd_prealloc_inode {
        struct list_head obd_prealloc_chain;
        unsigned long inode;
};

/* generic operations shared by various OBD types */
int gen_multi_setup(struct obd_device *obddev, uint32_t len, void *data);
int gen_multi_cleanup(struct obd_device *obddev);
int gen_multi_attach(struct obd_device *obddev, uint32_t len, void *data);
int gen_multi_detach(struct obd_device *obddev);
int gen_connect (struct obd_conn *conn);
int gen_disconnect(struct obd_conn *conn);
struct obd_client *gen_client(const struct obd_conn *);
int gen_cleanup(struct obd_device *obddev);
int gen_copy_data(struct obd_conn *dst_conn, struct obdo *dst,
                  struct obd_conn *src_conn, struct obdo *src,
                  obd_size count, obd_off offset);

#endif

/* sysctl.c */
extern void obd_sysctl_init (void);
extern void obd_sysctl_clean (void);

#endif /* __LINUX_CLASS_OBD_H */