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e7fd4179 DT |
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 | ||
e18b890b | 18 | static struct kmem_cache *lkb_cache; |
e7fd4179 DT |
19 | |
20 | ||
21 | int 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 | ||
32 | void dlm_memory_exit(void) | |
33 | { | |
34 | if (lkb_cache) | |
35 | kmem_cache_destroy(lkb_cache); | |
36 | } | |
37 | ||
38 | char *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 | ||
48 | void free_lvb(char *p) | |
49 | { | |
50 | kfree(p); | |
51 | } | |
52 | ||
e7fd4179 DT |
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 | ||
56 | struct 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 | ||
68 | void free_rsb(struct dlm_rsb *r) | |
69 | { | |
70 | if (r->res_lvbptr) | |
71 | free_lvb(r->res_lvbptr); | |
72 | kfree(r); | |
73 | } | |
74 | ||
75 | struct 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 | ||
85 | void free_lkb(struct dlm_lkb *lkb) | |
86 | { | |
597d0cae DT |
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 | } | |
e7fd4179 DT |
96 | kmem_cache_free(lkb_cache, lkb); |
97 | } | |
98 | ||
99 | struct dlm_direntry *allocate_direntry(struct dlm_ls *ls, int namelen) | |
100 | { | |
101 | struct dlm_direntry *de; | |
102 | ||
5ff51911 DT |
103 | DLM_ASSERT(namelen <= DLM_RESNAME_MAXLEN, |
104 | printk("namelen = %d\n", namelen);); | |
e7fd4179 DT |
105 | |
106 | de = kmalloc(sizeof(*de) + namelen, GFP_KERNEL); | |
107 | if (de) | |
108 | memset(de, 0, sizeof(*de) + namelen); | |
109 | return de; | |
110 | } | |
111 | ||
112 | void free_direntry(struct dlm_direntry *de) | |
113 | { | |
114 | kfree(de); | |
115 | } | |
116 |