LXR linux/fs/dlm/memory.c

   1/******************************************************************************
   2*******************************************************************************
   3**
   4**  Copyright (C) Sistina Software, Inc.  1997-2003  All rights reserved.
   5**  Copyright (C) 2004-2007 Red Hat, Inc.  All rights reserved.
   6**
   7**  This copyrighted material is made available to anyone wishing to use,
   8**  modify, copy, or redistribute it subject to the terms and conditions
   9**  of the GNU General Public License v.2.
  10**
  11*******************************************************************************
  12******************************************************************************/
  13
  14#include "dlm_internal.h"
  15#include "config.h"
  16#include "memory.h"
  17
  18static struct kmem_cache *lkb_cache;
  19static struct kmem_cache *rsb_cache;
  20
  21
  22int __init dlm_memory_init(void)
  23{
  24        lkb_cache = kmem_cache_create("dlm_lkb", sizeof(struct dlm_lkb),
  25                                __alignof__(struct dlm_lkb), 0, NULL);
  26        if (!lkb_cache)
  27                return -ENOMEM;
  28
  29        rsb_cache = kmem_cache_create("dlm_rsb", sizeof(struct dlm_rsb),
  30                                __alignof__(struct dlm_rsb), 0, NULL);
  31        if (!rsb_cache) {
  32                kmem_cache_destroy(lkb_cache);
  33                return -ENOMEM;
  34        }
  35
  36        return 0;
  37}
  38
  39void dlm_memory_exit(void)
  40{
  41        if (lkb_cache)
  42                kmem_cache_destroy(lkb_cache);
  43        if (rsb_cache)
  44                kmem_cache_destroy(rsb_cache);
  45}
  46
  47char *dlm_allocate_lvb(struct dlm_ls *ls)
  48{
  49        char *p;
  50
  51        p = kzalloc(ls->ls_lvblen, GFP_NOFS);
  52        return p;
  53}
  54
  55void dlm_free_lvb(char *p)
  56{
  57        kfree(p);
  58}
  59
  60struct dlm_rsb *dlm_allocate_rsb(struct dlm_ls *ls)
  61{
  62        struct dlm_rsb *r;
  63
  64        r = kmem_cache_zalloc(rsb_cache, GFP_NOFS);
  65        return r;
  66}
  67
  68void dlm_free_rsb(struct dlm_rsb *r)
  69{
  70        if (r->res_lvbptr)
  71                dlm_free_lvb(r->res_lvbptr);
  72        kmem_cache_free(rsb_cache, r);
  73}
  74
  75struct dlm_lkb *dlm_allocate_lkb(struct dlm_ls *ls)
  76{
  77        struct dlm_lkb *lkb;
  78
  79        lkb = kmem_cache_zalloc(lkb_cache, GFP_NOFS);
  80        return lkb;
  81}
  82
  83void dlm_free_lkb(struct dlm_lkb *lkb)
  84{
  85        if (lkb->lkb_flags & DLM_IFL_USER) {
  86                struct dlm_user_args *ua;
  87                ua = lkb->lkb_ua;
  88                if (ua) {
  89                        if (ua->lksb.sb_lvbptr)
  90                                kfree(ua->lksb.sb_lvbptr);
  91                        kfree(ua);
  92                }
  93        }
  94        kmem_cache_free(lkb_cache, lkb);
  95}
  96
  97