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 94