/*
 * Copyright 2000, International Business Machines Corporation and others.
 * All Rights Reserved.
 * 
 * This software has been released under the terms of the IBM Public
 * License.  For details, see the LICENSE file in the top-level source
 * directory or online at http://www.openafs.org/dl/license10.html
 */

/*
 * Linux module support routines.
 *
 */
#include <afsconfig.h>
#include "afs/param.h"

RCSID
    ("$Header$");

#if !defined(AFS_NONFSTRANS) || defined(AFS_AIX_IAUTH_ENV)
#include <linux/module.h> /* early to avoid printf->printk mapping */
#include "afs/sysincludes.h"
#include "afsincludes.h"
#include "h/unistd.h"		/* For syscall numbers. */
#include "h/mm.h"

#ifdef AFS_AMD64_LINUX20_ENV
#include <asm/ia32_unistd.h>
#endif
#ifdef AFS_SPARC64_LINUX20_ENV
#include <linux/ioctl32.h>
#endif

#include <linux/proc_fs.h>
#include <linux/slab.h>
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
#include <linux/init.h>
#include <linux/sched.h>
#include <linux/kernel.h>
#endif

static unsigned long nfs_server_addr = 0;
#if defined(module_param)
module_param(nfs_server_addr, long, 0);
#else
MODULE_PARM(nfs_server_addr,  "l");
#endif
MODULE_PARM_DESC(nfs_server_addr,  "IP Address of NFS Server");

static char *this_cell = 0;
#if defined(module_param_array) && LINUX_VERSION_CODE > KERNEL_VERSION(2,6,9)
module_param(this_cell, charp, 0);
#else
MODULE_PARM(this_cell, "s");
#endif
MODULE_PARM_DESC(this_cell, "Local cell name");

#if defined(AFS_LINUX24_ENV)
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,16)
DEFINE_MUTEX(afs_global_lock);
#else
DECLARE_MUTEX(afs_global_lock);
#endif
struct proc_dir_entry *openafs_procfs;
#else
struct semaphore afs_global_lock = MUTEX;
#endif
int afs_global_owner = 0;

#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
int __init
afspag_init(void)
#else
int
init_module(void)
#endif
{
    int err;

    osi_Init();

    err = osi_syscall_init();
    if (err)
	return err;
#ifdef AFS_LINUX24_ENV
    openafs_procfs = proc_mkdir(PROC_FSDIRNAME, proc_root_fs);
    osi_ioctl_init();
#endif

    afspag_Init(htonl(nfs_server_addr));
    if (this_cell)
	afspag_SetPrimaryCell(this_cell);

    return 0;
}

#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
void __exit
afspag_cleanup(void)
#else
void
cleanup_module(void)
#endif
{
    osi_syscall_clean();

    osi_linux_free_afs_memory();

#ifdef AFS_LINUX24_ENV
    osi_ioctl_clean();
    remove_proc_entry(PROC_FSDIRNAME, proc_root_fs);
#endif
    return;
}

#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
MODULE_LICENSE("http://www.openafs.org/dl/license10.html");
module_init(afspag_init);
module_exit(afspag_cleanup);
#endif

#ifdef AFS_LINUX26_ENV
/* Hack alert!
 * These will never be called in the standalone PAG manager, because
 * they are only referenced in afs_InitReq, and nothing calls that.
 * However, we need to define them in order to resolve the reference,
 * unless we want to move afs_InitReq out of afs_osi_pag.c.
 */
int osi_linux_nfs_initreq(struct vrequest *av, struct AFS_UCRED *cr, int *code)
{
    *code = EACCES;
    return 1;
}

int
afs_nfsclient_reqhandler(struct afs_exporter *exporter,
			 struct AFS_UCRED **cred,
			 afs_int32 host, afs_int32 *pagparam,
			 struct afs_exporter **outexporter)
{
    return EINVAL;
}
#endif
#endif /* AFS_NONFSTRANS */