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 
dlm_memory_init(void)22 int __init dlm_memory_init(void)
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 
dlm_memory_exit(void)39 void dlm_memory_exit(void)
40 {
41 	kmem_cache_destroy(lkb_cache);
42 	kmem_cache_destroy(rsb_cache);
43 }
44 
dlm_allocate_lvb(struct dlm_ls * ls)45 char *dlm_allocate_lvb(struct dlm_ls *ls)
46 {
47 	char *p;
48 
49 	p = kzalloc(ls->ls_lvblen, GFP_NOFS);
50 	return p;
51 }
52 
dlm_free_lvb(char * p)53 void dlm_free_lvb(char *p)
54 {
55 	kfree(p);
56 }
57 
dlm_allocate_rsb(struct dlm_ls * ls)58 struct dlm_rsb *dlm_allocate_rsb(struct dlm_ls *ls)
59 {
60 	struct dlm_rsb *r;
61 
62 	r = kmem_cache_zalloc(rsb_cache, GFP_NOFS);
63 	return r;
64 }
65 
dlm_free_rsb(struct dlm_rsb * r)66 void dlm_free_rsb(struct dlm_rsb *r)
67 {
68 	if (r->res_lvbptr)
69 		dlm_free_lvb(r->res_lvbptr);
70 	kmem_cache_free(rsb_cache, r);
71 }
72 
dlm_allocate_lkb(struct dlm_ls * ls)73 struct dlm_lkb *dlm_allocate_lkb(struct dlm_ls *ls)
74 {
75 	struct dlm_lkb *lkb;
76 
77 	lkb = kmem_cache_zalloc(lkb_cache, GFP_NOFS);
78 	return lkb;
79 }
80 
dlm_free_lkb(struct dlm_lkb * lkb)81 void dlm_free_lkb(struct dlm_lkb *lkb)
82 {
83 	if (lkb->lkb_flags & DLM_IFL_USER) {
84 		struct dlm_user_args *ua;
85 		ua = lkb->lkb_ua;
86 		if (ua) {
87 			kfree(ua->lksb.sb_lvbptr);
88 			kfree(ua);
89 		}
90 	}
91 	kmem_cache_free(lkb_cache, lkb);
92 }
93 
94