1/****************************************************************************** 2******************************************************************************* 3** 4** Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. 5** Copyright (C) 2004-2005 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; 19 20 21int dlm_memory_init(void) 22{ 23 int ret = 0; 24 25 lkb_cache = kmem_cache_create("dlm_lkb", sizeof(struct dlm_lkb), 26 __alignof__(struct dlm_lkb), 0, NULL, NULL); 27 if (!lkb_cache) 28 ret = -ENOMEM; 29 return ret; 30} 31 32void dlm_memory_exit(void) 33{ 34 if (lkb_cache) 35 kmem_cache_destroy(lkb_cache); 36} 37 38char *allocate_lvb(struct dlm_ls *ls) 39{ 40 char *p; 41 42 p = kmalloc(ls->ls_lvblen, GFP_KERNEL); 43 if (p) 44 memset(p, 0, ls->ls_lvblen); 45 return p; 46} 47 48void free_lvb(char *p) 49{ 50 kfree(p); 51} 52 53 54struct dlm_rsb *allocate_rsb(struct dlm_ls *ls, int namelen) 55{ 56 struct dlm_rsb *r; 57 58 DLM_ASSERT(namelen <= DLM_RESNAME_MAXLEN,); 59 60 r = kmalloc(sizeof(*r) + namelen, GFP_KERNEL); 61 if (r) 62 memset(r, 0, sizeof(*r) + namelen); 63 return r; 64} 65 66void free_rsb(struct dlm_rsb *r) 67{ 68 if (r->res_lvbptr) 69 free_lvb(r->res_lvbptr); 70 kfree(r); 71} 72 73struct dlm_lkb *allocate_lkb(struct dlm_ls *ls) 74{ 75 struct dlm_lkb *lkb; 76 77 lkb = kmem_cache_zalloc(lkb_cache, GFP_KERNEL); 78 return lkb; 79} 80 81void free_lkb(struct dlm_lkb *lkb) 82{ 83 if (lkb->lkb_flags & DLM_IFL_USER) { 84 struct dlm_user_args *ua; 85 ua = (struct dlm_user_args *)lkb->lkb_astparam; 86 if (ua) { 87 if (ua->lksb.sb_lvbptr) 88 kfree(ua->lksb.sb_lvbptr); 89 kfree(ua); 90 } 91 } 92 kmem_cache_free(lkb_cache, lkb); 93} 94 95struct dlm_direntry *allocate_direntry(struct dlm_ls *ls, int namelen) 96{ 97 struct dlm_direntry *de; 98 99 DLM_ASSERT(namelen <= DLM_RESNAME_MAXLEN, 100 printk("namelen = %d\n", namelen);); 101 102 de = kmalloc(sizeof(*de) + namelen, GFP_KERNEL); 103 if (de) 104 memset(de, 0, sizeof(*de) + namelen); 105 return de; 106} 107 108void free_direntry(struct dlm_direntry *de) 109{ 110 kfree(de); 111} 112