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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 | ||
18 | static kmem_cache_t *lkb_cache; | |
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 | ||
53 | uint64_t *allocate_range(struct dlm_ls *ls) | |
54 | { | |
55 | int ralen = 4*sizeof(uint64_t); | |
56 | uint64_t *p; | |
57 | ||
58 | p = kmalloc(ralen, GFP_KERNEL); | |
59 | if (p) | |
60 | memset(p, 0, ralen); | |
61 | return p; | |
62 | } | |
63 | ||
64 | void free_range(uint64_t *p) | |
65 | { | |
66 | kfree(p); | |
67 | } | |
68 | ||
69 | /* FIXME: have some minimal space built-in to rsb for the name and | |
70 | kmalloc a separate name if needed, like dentries are done */ | |
71 | ||
72 | struct dlm_rsb *allocate_rsb(struct dlm_ls *ls, int namelen) | |
73 | { | |
74 | struct dlm_rsb *r; | |
75 | ||
76 | DLM_ASSERT(namelen <= DLM_RESNAME_MAXLEN,); | |
77 | ||
78 | r = kmalloc(sizeof(*r) + namelen, GFP_KERNEL); | |
79 | if (r) | |
80 | memset(r, 0, sizeof(*r) + namelen); | |
81 | return r; | |
82 | } | |
83 | ||
84 | void free_rsb(struct dlm_rsb *r) | |
85 | { | |
86 | if (r->res_lvbptr) | |
87 | free_lvb(r->res_lvbptr); | |
88 | kfree(r); | |
89 | } | |
90 | ||
91 | struct dlm_lkb *allocate_lkb(struct dlm_ls *ls) | |
92 | { | |
93 | struct dlm_lkb *lkb; | |
94 | ||
95 | lkb = kmem_cache_alloc(lkb_cache, GFP_KERNEL); | |
96 | if (lkb) | |
97 | memset(lkb, 0, sizeof(*lkb)); | |
98 | return lkb; | |
99 | } | |
100 | ||
101 | void free_lkb(struct dlm_lkb *lkb) | |
102 | { | |
103 | kmem_cache_free(lkb_cache, lkb); | |
104 | } | |
105 | ||
106 | struct dlm_direntry *allocate_direntry(struct dlm_ls *ls, int namelen) | |
107 | { | |
108 | struct dlm_direntry *de; | |
109 | ||
110 | DLM_ASSERT(namelen <= DLM_RESNAME_MAXLEN,); | |
111 | ||
112 | de = kmalloc(sizeof(*de) + namelen, GFP_KERNEL); | |
113 | if (de) | |
114 | memset(de, 0, sizeof(*de) + namelen); | |
115 | return de; | |
116 | } | |
117 | ||
118 | void free_direntry(struct dlm_direntry *de) | |
119 | { | |
120 | kfree(de); | |
121 | } | |
122 |