Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1// SPDX-License-Identifier: GPL-2.0-only
2/******************************************************************************
3*******************************************************************************
4**
5** Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
6** Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved.
7**
8**
9*******************************************************************************
10******************************************************************************/
11
12#include "dlm_internal.h"
13#include "midcomms.h"
14#include "lowcomms.h"
15#include "config.h"
16#include "memory.h"
17#include "ast.h"
18
19static struct kmem_cache *writequeue_cache;
20static struct kmem_cache *mhandle_cache;
21static struct kmem_cache *msg_cache;
22static struct kmem_cache *lkb_cache;
23static struct kmem_cache *rsb_cache;
24static struct kmem_cache *cb_cache;
25
26
27int __init dlm_memory_init(void)
28{
29 writequeue_cache = dlm_lowcomms_writequeue_cache_create();
30 if (!writequeue_cache)
31 goto out;
32
33 mhandle_cache = dlm_midcomms_cache_create();
34 if (!mhandle_cache)
35 goto mhandle;
36
37 lkb_cache = kmem_cache_create("dlm_lkb", sizeof(struct dlm_lkb),
38 __alignof__(struct dlm_lkb), 0, NULL);
39 if (!lkb_cache)
40 goto lkb;
41
42 msg_cache = dlm_lowcomms_msg_cache_create();
43 if (!msg_cache)
44 goto msg;
45
46 rsb_cache = kmem_cache_create("dlm_rsb", sizeof(struct dlm_rsb),
47 __alignof__(struct dlm_rsb), 0, NULL);
48 if (!rsb_cache)
49 goto rsb;
50
51 cb_cache = kmem_cache_create("dlm_cb", sizeof(struct dlm_callback),
52 __alignof__(struct dlm_callback), 0,
53 NULL);
54 if (!cb_cache)
55 goto cb;
56
57 return 0;
58
59cb:
60 kmem_cache_destroy(rsb_cache);
61rsb:
62 kmem_cache_destroy(msg_cache);
63msg:
64 kmem_cache_destroy(lkb_cache);
65lkb:
66 kmem_cache_destroy(mhandle_cache);
67mhandle:
68 kmem_cache_destroy(writequeue_cache);
69out:
70 return -ENOMEM;
71}
72
73void dlm_memory_exit(void)
74{
75 kmem_cache_destroy(writequeue_cache);
76 kmem_cache_destroy(mhandle_cache);
77 kmem_cache_destroy(msg_cache);
78 kmem_cache_destroy(lkb_cache);
79 kmem_cache_destroy(rsb_cache);
80 kmem_cache_destroy(cb_cache);
81}
82
83char *dlm_allocate_lvb(struct dlm_ls *ls)
84{
85 char *p;
86
87 p = kzalloc(ls->ls_lvblen, GFP_ATOMIC);
88 return p;
89}
90
91void dlm_free_lvb(char *p)
92{
93 kfree(p);
94}
95
96struct dlm_rsb *dlm_allocate_rsb(struct dlm_ls *ls)
97{
98 struct dlm_rsb *r;
99
100 r = kmem_cache_zalloc(rsb_cache, GFP_ATOMIC);
101 return r;
102}
103
104void dlm_free_rsb(struct dlm_rsb *r)
105{
106 if (r->res_lvbptr)
107 dlm_free_lvb(r->res_lvbptr);
108 kmem_cache_free(rsb_cache, r);
109}
110
111struct dlm_lkb *dlm_allocate_lkb(struct dlm_ls *ls)
112{
113 struct dlm_lkb *lkb;
114
115 lkb = kmem_cache_zalloc(lkb_cache, GFP_ATOMIC);
116 return lkb;
117}
118
119void dlm_free_lkb(struct dlm_lkb *lkb)
120{
121 if (test_bit(DLM_DFL_USER_BIT, &lkb->lkb_dflags)) {
122 struct dlm_user_args *ua;
123 ua = lkb->lkb_ua;
124 if (ua) {
125 kfree(ua->lksb.sb_lvbptr);
126 kfree(ua);
127 }
128 }
129
130 kmem_cache_free(lkb_cache, lkb);
131}
132
133struct dlm_mhandle *dlm_allocate_mhandle(void)
134{
135 return kmem_cache_alloc(mhandle_cache, GFP_ATOMIC);
136}
137
138void dlm_free_mhandle(struct dlm_mhandle *mhandle)
139{
140 kmem_cache_free(mhandle_cache, mhandle);
141}
142
143struct writequeue_entry *dlm_allocate_writequeue(void)
144{
145 return kmem_cache_alloc(writequeue_cache, GFP_ATOMIC);
146}
147
148void dlm_free_writequeue(struct writequeue_entry *writequeue)
149{
150 kmem_cache_free(writequeue_cache, writequeue);
151}
152
153struct dlm_msg *dlm_allocate_msg(void)
154{
155 return kmem_cache_alloc(msg_cache, GFP_ATOMIC);
156}
157
158void dlm_free_msg(struct dlm_msg *msg)
159{
160 kmem_cache_free(msg_cache, msg);
161}
162
163struct dlm_callback *dlm_allocate_cb(void)
164{
165 return kmem_cache_alloc(cb_cache, GFP_ATOMIC);
166}
167
168void dlm_free_cb(struct dlm_callback *cb)
169{
170 kmem_cache_free(cb_cache, cb);
171}