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
  18 static struct kmem_cache *lkb_cache;
  19 static struct kmem_cache *rsb_cache;
  20
  21
  22 int __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
  41 void 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
  49 char *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
  57 void dlm_free_lvb(char *p)
  58 {
  59         kfree(p);
  60 }
  61
  62 struct 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
  70 void 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
  77 struct 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
  85 void 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