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 99