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 20 21 int __init 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); 27 if (!lkb_cache) 28 ret = -ENOMEM; 29 return ret; 30 } 31 32 void dlm_memory_exit(void) 33 { 34 if (lkb_cache) 35 kmem_cache_destroy(lkb_cache); 36 } 37 38 char *dlm_allocate_lvb(struct dlm_ls *ls) 39 { 40 char *p; 41 42 p = kzalloc(ls->ls_lvblen, GFP_KERNEL); 43 return p; 44 } 45 46 void dlm_free_lvb(char *p) 47 { 48 kfree(p); 49 } 50 51 /* FIXME: have some minimal space built-in to rsb for the name and 52 kmalloc a separate name if needed, like dentries are done */ 53 54 struct dlm_rsb *dlm_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 = kzalloc(sizeof(*r) + namelen, GFP_KERNEL); 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 kfree(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_KERNEL); 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 if (ua->lksb.sb_lvbptr) 86 kfree(ua->lksb.sb_lvbptr); 87 kfree(ua); 88 } 89 } 90 kmem_cache_free(lkb_cache, lkb); 91 } 92 93