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memory.c
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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 static struct kmem_cache *rsb_cache;
20 
21 
23 {
24  lkb_cache = kmem_cache_create("dlm_lkb", sizeof(struct dlm_lkb),
25  __alignof__(struct dlm_lkb), 0, NULL);
26  if (!lkb_cache)
27  return -ENOMEM;
28 
29  rsb_cache = kmem_cache_create("dlm_rsb", sizeof(struct dlm_rsb),
30  __alignof__(struct dlm_rsb), 0, NULL);
31  if (!rsb_cache) {
32  kmem_cache_destroy(lkb_cache);
33  return -ENOMEM;
34  }
35 
36  return 0;
37 }
38 
39 void dlm_memory_exit(void)
40 {
41  if (lkb_cache)
42  kmem_cache_destroy(lkb_cache);
43  if (rsb_cache)
44  kmem_cache_destroy(rsb_cache);
45 }
46 
47 char *dlm_allocate_lvb(struct dlm_ls *ls)
48 {
49  char *p;
50 
51  p = kzalloc(ls->ls_lvblen, GFP_NOFS);
52  return p;
53 }
54 
55 void dlm_free_lvb(char *p)
56 {
57  kfree(p);
58 }
59 
60 struct dlm_rsb *dlm_allocate_rsb(struct dlm_ls *ls)
61 {
62  struct dlm_rsb *r;
63 
64  r = kmem_cache_zalloc(rsb_cache, GFP_NOFS);
65  return r;
66 }
67 
68 void dlm_free_rsb(struct dlm_rsb *r)
69 {
70  if (r->res_lvbptr)
72  kmem_cache_free(rsb_cache, r);
73 }
74 
75 struct dlm_lkb *dlm_allocate_lkb(struct dlm_ls *ls)
76 {
77  struct dlm_lkb *lkb;
78 
79  lkb = kmem_cache_zalloc(lkb_cache, GFP_NOFS);
80  return lkb;
81 }
82 
83 void dlm_free_lkb(struct dlm_lkb *lkb)
84 {
85  if (lkb->lkb_flags & DLM_IFL_USER) {
86  struct dlm_user_args *ua;
87  ua = lkb->lkb_ua;
88  if (ua) {
89  if (ua->lksb.sb_lvbptr)
90  kfree(ua->lksb.sb_lvbptr);
91  kfree(ua);
92  }
93  }
94  kmem_cache_free(lkb_cache, lkb);
95 }
96