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        int ret = 0;
  25
  26        lkb_cache = kmem_cache_create("dlm_lkb", sizeof(struct dlm_lkb),
  27                                __alignof__(struct dlm_lkb), 0, NULL);
  28        if (!lkb_cache)
  29                ret = -ENOMEM;
  30
  31        rsb_cache = kmem_cache_create("dlm_rsb", sizeof(struct dlm_rsb),
  32                                __alignof__(struct dlm_rsb), 0, NULL);
  33        if (!rsb_cache) {
  34                kmem_cache_destroy(lkb_cache);
  35                ret = -ENOMEM;
  36        }
  37
  38        return ret;
  39}
  40
  41void dlm_memory_exit(void)
  42{
  43        if (lkb_cache)
  44                kmem_cache_destroy(lkb_cache);
  45        if (rsb_cache)
  46                kmem_cache_destroy(rsb_cache);
  47}
  48
  49char *dlm_allocate_lvb(struct dlm_ls *ls)
  50{
  51        char *p;
  52
  53        p = kzalloc(ls->ls_lvblen, GFP_NOFS);
  54        return p;
  55}
  56
  57void dlm_free_lvb(char *p)
  58{
  59        kfree(p);
  60}
  61
  62struct dlm_rsb *dlm_allocate_rsb(struct dlm_ls *ls)
  63{
  64        struct dlm_rsb *r;
  65
  66        r = kmem_cache_zalloc(rsb_cache, GFP_NOFS);
  67        return r;
  68}
  69
  70void dlm_free_rsb(struct dlm_rsb *r)
  71{
  72        if (r->res_lvbptr)
  73                dlm_free_lvb(r->res_lvbptr);
  74        kmem_cache_free(rsb_cache, r);
  75}
  76
  77struct dlm_lkb *dlm_allocate_lkb(struct dlm_ls *ls)
  78{
  79        struct dlm_lkb *lkb;
  80
  81        lkb = kmem_cache_zalloc(lkb_cache, GFP_NOFS);
  82        return lkb;
  83}
  84
  85void dlm_free_lkb(struct dlm_lkb *lkb)
  86{
  87        if (lkb->lkb_flags & DLM_IFL_USER) {
  88                struct dlm_user_args *ua;
  89                ua = lkb->lkb_ua;
  90                if (ua) {
  91                        if (ua->lksb.sb_lvbptr)
  92                                kfree(ua->lksb.sb_lvbptr);
  93                        kfree(ua);
  94                }
  95        }
  96        kmem_cache_free(lkb_cache, lkb);
  97}
  98
  99