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         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
  39 void dlm_memory_exit(void)
  40 {
  41         kmem_cache_destroy(lkb_cache);
  42         kmem_cache_destroy(rsb_cache);
  43 }
  44
  45 char *dlm_allocate_lvb(struct dlm_ls *ls)
  46 {
  47         char *p;
  48
  49         p = kzalloc(ls->ls_lvblen, GFP_NOFS);
  50         return p;
  51 }
  52
  53 void dlm_free_lvb(char *p)
  54 {
  55         kfree(p);
  56 }
  57
  58 struct dlm_rsb *dlm_allocate_rsb(struct dlm_ls *ls)
  59 {
  60         struct dlm_rsb *r;
  61
  62         r = kmem_cache_zalloc(rsb_cache, GFP_NOFS);
  63         return r;
  64 }
  65
  66 void dlm_free_rsb(struct dlm_rsb *r)
  67 {
  68         if (r->res_lvbptr)
  69                 dlm_free_lvb(r->res_lvbptr);
  70         kmem_cache_free(rsb_cache, r);
  71 }
  72
  73 struct dlm_lkb *dlm_allocate_lkb(struct dlm_ls *ls)
  74 {
  75         struct dlm_lkb *lkb;
  76
  77         lkb = kmem_cache_zalloc(lkb_cache, GFP_NOFS);
  78         return lkb;
  79 }
  80
  81 void dlm_free_lkb(struct dlm_lkb *lkb)
  82 {
  83         if (lkb->lkb_flags & DLM_IFL_USER) {
  84                 struct dlm_user_args *ua;
  85                 ua = lkb->lkb_ua;
  86                 if (ua) {
  87                         kfree(ua->lksb.sb_lvbptr);
  88                         kfree(ua);
  89                 }
  90         }
  91         kmem_cache_free(lkb_cache, lkb);
  92 }
  93