/******************************************************************************
  *******************************************************************************
  **
  **  Copyright (C) Sistina Software, Inc.  1997-2003  All rights reserved.
  **  Copyright (C) 2004-2005 Red Hat, Inc.  All rights reserved.
  **
  **  This copyrighted material is made available to anyone wishing to use,
  **  modify, copy, or redistribute it subject to the terms and conditions
  **  of the GNU General Public License v.2.
  **
  *******************************************************************************
  ******************************************************************************/
  
  #include "dlm_internal.h"
  #include "config.h"
  #include "memory.h"

  static struct kmem_cache *lkb_cache;

  
  
  int dlm_memory_init(void)
  {
  	int ret = 0;
  
  	lkb_cache = kmem_cache_create("dlm_lkb", sizeof(struct dlm_lkb),

  				__alignof__(struct dlm_lkb), 0, NULL);

  	if (!lkb_cache)
  		ret = -ENOMEM;
  	return ret;
  }
  
  void dlm_memory_exit(void)
  {
  	if (lkb_cache)
  		kmem_cache_destroy(lkb_cache);
  }
  
  char *allocate_lvb(struct dlm_ls *ls)
  {
  	char *p;

  	p = kzalloc(ls->ls_lvblen, GFP_KERNEL);

  	return p;
  }
  
  void free_lvb(char *p)
  {
  	kfree(p);
  }

  /* FIXME: have some minimal space built-in to rsb for the name and
     kmalloc a separate name if needed, like dentries are done */
  
  struct dlm_rsb *allocate_rsb(struct dlm_ls *ls, int namelen)
  {
  	struct dlm_rsb *r;
  
  	DLM_ASSERT(namelen <= DLM_RESNAME_MAXLEN,);

  	r = kzalloc(sizeof(*r) + namelen, GFP_KERNEL);

  	return r;
  }
  
  void free_rsb(struct dlm_rsb *r)
  {
  	if (r->res_lvbptr)
  		free_lvb(r->res_lvbptr);
  	kfree(r);
  }
  
  struct dlm_lkb *allocate_lkb(struct dlm_ls *ls)
  {
  	struct dlm_lkb *lkb;

  	lkb = kmem_cache_zalloc(lkb_cache, GFP_KERNEL);

  	return lkb;
  }
  
  void free_lkb(struct dlm_lkb *lkb)
  {

  	if (lkb->lkb_flags & DLM_IFL_USER) {
  		struct dlm_user_args *ua;
  		ua = (struct dlm_user_args *)lkb->lkb_astparam;
  		if (ua) {
  			if (ua->lksb.sb_lvbptr)
  				kfree(ua->lksb.sb_lvbptr);
  			kfree(ua);
  		}
  	}

  	kmem_cache_free(lkb_cache, lkb);
  }
  
  struct dlm_direntry *allocate_direntry(struct dlm_ls *ls, int namelen)
  {
  	struct dlm_direntry *de;

  	DLM_ASSERT(namelen <= DLM_RESNAME_MAXLEN,
  		   printk("namelen = %d
  ", namelen););

  	de = kzalloc(sizeof(*de) + namelen, GFP_KERNEL);

  	return de;
  }
  
  void free_direntry(struct dlm_direntry *de)
  {
  	kfree(de);
  }