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 if (lkb_cache)
42 kmem_cache_destroy(lkb_cache);
43 if (rsb_cache)
44 kmem_cache_destroy(rsb_cache);
45 }
46
dlm_allocate_lvb(struct dlm_ls * ls)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
dlm_free_lvb(char * p)55 void dlm_free_lvb(char *p)
56 {
57 kfree(p);
58 }
59
dlm_allocate_rsb(struct dlm_ls * ls)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
dlm_free_rsb(struct dlm_rsb * r)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
dlm_allocate_lkb(struct dlm_ls * ls)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
dlm_free_lkb(struct dlm_lkb * lkb)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
