root/fs/dlm/memory.c

DEFINITIONS

1. dlm_memory_init
2. dlm_memory_exit
3. dlm_allocate_lvb
4. dlm_free_lvb
5. dlm_allocate_rsb
6. dlm_free_rsb
7. dlm_allocate_lkb
8. dlm_free_lkb

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /******************************************************************************
   3 *******************************************************************************
   4 **
   5 **  Copyright (C) Sistina Software, Inc.  1997-2003  All rights reserved.
   6 **  Copyright (C) 2004-2007 Red Hat, Inc.  All rights reserved.
   7 **
   8 **
   9 *******************************************************************************
  10 ******************************************************************************/
  11 
  12 #include "dlm_internal.h"
  13 #include "config.h"
  14 #include "memory.h"
  15 
  16 static struct kmem_cache *lkb_cache;
  17 static struct kmem_cache *rsb_cache;
  18 
  19 
  20 int __init dlm_memory_init(void)
  21 {
  22         lkb_cache = kmem_cache_create("dlm_lkb", sizeof(struct dlm_lkb),
  23                                 __alignof__(struct dlm_lkb), 0, NULL);
  24         if (!lkb_cache)
  25                 return -ENOMEM;
  26 
  27         rsb_cache = kmem_cache_create("dlm_rsb", sizeof(struct dlm_rsb),
  28                                 __alignof__(struct dlm_rsb), 0, NULL);
  29         if (!rsb_cache) {
  30                 kmem_cache_destroy(lkb_cache);
  31                 return -ENOMEM;
  32         }
  33 
  34         return 0;
  35 }
  36 
  37 void dlm_memory_exit(void)
  38 {
  39         kmem_cache_destroy(lkb_cache);
  40         kmem_cache_destroy(rsb_cache);
  41 }
  42 
  43 char *dlm_allocate_lvb(struct dlm_ls *ls)
  44 {
  45         char *p;
  46 
  47         p = kzalloc(ls->ls_lvblen, GFP_NOFS);
  48         return p;
  49 }
  50 
  51 void dlm_free_lvb(char *p)
  52 {
  53         kfree(p);
  54 }
  55 
  56 struct dlm_rsb *dlm_allocate_rsb(struct dlm_ls *ls)
  57 {
  58         struct dlm_rsb *r;
  59 
  60         r = kmem_cache_zalloc(rsb_cache, GFP_NOFS);
  61         return r;
  62 }
  63 
  64 void dlm_free_rsb(struct dlm_rsb *r)
  65 {
  66         if (r->res_lvbptr)
  67                 dlm_free_lvb(r->res_lvbptr);
  68         kmem_cache_free(rsb_cache, r);
  69 }
  70 
  71 struct dlm_lkb *dlm_allocate_lkb(struct dlm_ls *ls)
  72 {
  73         struct dlm_lkb *lkb;
  74 
  75         lkb = kmem_cache_zalloc(lkb_cache, GFP_NOFS);
  76         return lkb;
  77 }
  78 
  79 void dlm_free_lkb(struct dlm_lkb *lkb)
  80 {
  81         if (lkb->lkb_flags & DLM_IFL_USER) {
  82                 struct dlm_user_args *ua;
  83                 ua = lkb->lkb_ua;
  84                 if (ua) {
  85                         kfree(ua->lksb.sb_lvbptr);
  86                         kfree(ua);
  87                 }
  88         }
  89         kmem_cache_free(lkb_cache, lkb);
  90 }
  91