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
dlm_memory_init(void)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
dlm_memory_exit(void)39 void dlm_memory_exit(void)
40 {
41 kmem_cache_destroy(lkb_cache);
42 kmem_cache_destroy(rsb_cache);
43 }
44
dlm_allocate_lvb(struct dlm_ls * ls)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
dlm_free_lvb(char * p)53 void dlm_free_lvb(char *p)
54 {
55 kfree(p);
56 }
57
dlm_allocate_rsb(struct dlm_ls * ls)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
dlm_free_rsb(struct dlm_rsb * r)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
dlm_allocate_lkb(struct dlm_ls * ls)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
dlm_free_lkb(struct dlm_lkb * lkb)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