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
dlm_memory_init(void)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
dlm_memory_exit(void)32 void dlm_memory_exit(void)
33 {
34 if (lkb_cache)
35 kmem_cache_destroy(lkb_cache);
36 }
37
dlm_allocate_lvb(struct dlm_ls * ls)38 char *dlm_allocate_lvb(struct dlm_ls *ls)
39 {
40 char *p;
41
42 p = kzalloc(ls->ls_lvblen, GFP_NOFS);
43 return p;
44 }
45
dlm_free_lvb(char * p)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
dlm_allocate_rsb(struct dlm_ls * ls,int namelen)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_NOFS);
61 return r;
62 }
63
dlm_free_rsb(struct dlm_rsb * r)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
dlm_allocate_lkb(struct dlm_ls * ls)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_NOFS);
76 return lkb;
77 }
78
dlm_free_lkb(struct dlm_lkb * lkb)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