1/******************************************************************************
2*******************************************************************************
3**
4**  Copyright (C) Sistina Software, Inc.  1997-2003  All rights reserved.
5**  Copyright (C) 2004-2005 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
18static struct kmem_cache *lkb_cache;
19
20
21int 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, NULL);
27	if (!lkb_cache)
28		ret = -ENOMEM;
29	return ret;
30}
31
32void dlm_memory_exit(void)
33{
34	if (lkb_cache)
35		kmem_cache_destroy(lkb_cache);
36}
37
38char *allocate_lvb(struct dlm_ls *ls)
39{
40	char *p;
41
42	p = kmalloc(ls->ls_lvblen, GFP_KERNEL);
43	if (p)
44		memset(p, 0, ls->ls_lvblen);
45	return p;
46}
47
48void free_lvb(char *p)
49{
50	kfree(p);
51}
52
53
54struct dlm_rsb *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 = kmalloc(sizeof(*r) + namelen, GFP_KERNEL);
61	if (r)
62		memset(r, 0, sizeof(*r) + namelen);
63	return r;
64}
65
66void free_rsb(struct dlm_rsb *r)
67{
68	if (r->res_lvbptr)
69		free_lvb(r->res_lvbptr);
70	kfree(r);
71}
72
73struct dlm_lkb *allocate_lkb(struct dlm_ls *ls)
74{
75	struct dlm_lkb *lkb;
76
77	lkb = kmem_cache_zalloc(lkb_cache, GFP_KERNEL);
78	return lkb;
79}
80
81void free_lkb(struct dlm_lkb *lkb)
82{
83	if (lkb->lkb_flags & DLM_IFL_USER) {
84		struct dlm_user_args *ua;
85		ua = (struct dlm_user_args *)lkb->lkb_astparam;
86		if (ua) {
87			if (ua->lksb.sb_lvbptr)
88				kfree(ua->lksb.sb_lvbptr);
89			kfree(ua);
90		}
91	}
92	kmem_cache_free(lkb_cache, lkb);
93}
94
95struct dlm_direntry *allocate_direntry(struct dlm_ls *ls, int namelen)
96{
97	struct dlm_direntry *de;
98
99	DLM_ASSERT(namelen <= DLM_RESNAME_MAXLEN,
100		   printk("namelen = %d\n", namelen););
101
102	de = kmalloc(sizeof(*de) + namelen, GFP_KERNEL);
103	if (de)
104		memset(de, 0, sizeof(*de) + namelen);
105	return de;
106}
107
108void free_direntry(struct dlm_direntry *de)
109{
110	kfree(de);
111}
112