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 if (lkb_cache) 42 kmem_cache_destroy(lkb_cache); 43 if (rsb_cache) 44 kmem_cache_destroy(rsb_cache); 45 } 46 47 char *dlm_allocate_lvb(struct dlm_ls *ls) 48 { 49 char *p; 50 51 p = kzalloc(ls->ls_lvblen, GFP_NOFS); 52 return p; 53 } 54 55 void dlm_free_lvb(char *p) 56 { 57 kfree(p); 58 } 59 60 struct dlm_rsb *dlm_allocate_rsb(struct dlm_ls *ls) 61 { 62 struct dlm_rsb *r; 63 64 r = kmem_cache_zalloc(rsb_cache, GFP_NOFS); 65 return r; 66 } 67 68 void dlm_free_rsb(struct dlm_rsb *r) 69 { 70 if (r->res_lvbptr) 71 dlm_free_lvb(r->res_lvbptr); 72 kmem_cache_free(rsb_cache, r); 73 } 74 75 struct dlm_lkb *dlm_allocate_lkb(struct dlm_ls *ls) 76 { 77 struct dlm_lkb *lkb; 78 79 lkb = kmem_cache_zalloc(lkb_cache, GFP_NOFS); 80 return lkb; 81 } 82 83 void dlm_free_lkb(struct dlm_lkb *lkb) 84 { 85 if (lkb->lkb_flags & DLM_IFL_USER) { 86 struct dlm_user_args *ua; 87 ua = lkb->lkb_ua; 88 if (ua) { 89 if (ua->lksb.sb_lvbptr) 90 kfree(ua->lksb.sb_lvbptr); 91 kfree(ua); 92 } 93 } 94 kmem_cache_free(lkb_cache, lkb); 95 } 96 97