Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
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/* FIXME: have some minimal space built-in to rsb for the name and
54 kmalloc a separate name if needed, like dentries are done */
55
56struct dlm_rsb *allocate_rsb(struct dlm_ls *ls, int namelen)
57{
58 struct dlm_rsb *r;
59
60 DLM_ASSERT(namelen <= DLM_RESNAME_MAXLEN,);
61
62 r = kmalloc(sizeof(*r) + namelen, GFP_KERNEL);
63 if (r)
64 memset(r, 0, sizeof(*r) + namelen);
65 return r;
66}
67
68void free_rsb(struct dlm_rsb *r)
69{
70 if (r->res_lvbptr)
71 free_lvb(r->res_lvbptr);
72 kfree(r);
73}
74
75struct dlm_lkb *allocate_lkb(struct dlm_ls *ls)
76{
77 struct dlm_lkb *lkb;
78
79 lkb = kmem_cache_alloc(lkb_cache, GFP_KERNEL);
80 if (lkb)
81 memset(lkb, 0, sizeof(*lkb));
82 return lkb;
83}
84
85void free_lkb(struct dlm_lkb *lkb)
86{
87 if (lkb->lkb_flags & DLM_IFL_USER) {
88 struct dlm_user_args *ua;
89 ua = (struct dlm_user_args *)lkb->lkb_astparam;
90 if (ua) {
91 if (ua->lksb.sb_lvbptr)
92 kfree(ua->lksb.sb_lvbptr);
93 kfree(ua);
94 }
95 }
96 kmem_cache_free(lkb_cache, lkb);
97}
98
99struct dlm_direntry *allocate_direntry(struct dlm_ls *ls, int namelen)
100{
101 struct dlm_direntry *de;
102
103 DLM_ASSERT(namelen <= DLM_RESNAME_MAXLEN,
104 printk("namelen = %d\n", namelen););
105
106 de = kmalloc(sizeof(*de) + namelen, GFP_KERNEL);
107 if (de)
108 memset(de, 0, sizeof(*de) + namelen);
109 return de;
110}
111
112void free_direntry(struct dlm_direntry *de)
113{
114 kfree(de);
115}
116