tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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
18static struct kmem_cache *writequeue_cache;
19static struct kmem_cache *mhandle_cache;
20static struct kmem_cache *msg_cache;
21static struct kmem_cache *lkb_cache;
22static struct kmem_cache *rsb_cache;
23
24
25int __init dlm_memory_init(void)
26{
27 writequeue_cache = dlm_lowcomms_writequeue_cache_create();
28 if (!writequeue_cache)
29 goto out;
30
31 mhandle_cache = dlm_midcomms_cache_create();
32 if (!mhandle_cache)
33 goto mhandle;
34
35 lkb_cache = kmem_cache_create("dlm_lkb", sizeof(struct dlm_lkb),
36 __alignof__(struct dlm_lkb), 0, NULL);
37 if (!lkb_cache)
38 goto lkb;
39
40 msg_cache = dlm_lowcomms_msg_cache_create();
41 if (!msg_cache)
42 goto msg;
43
44 rsb_cache = kmem_cache_create("dlm_rsb", sizeof(struct dlm_rsb),
45 __alignof__(struct dlm_rsb), 0, NULL);
46 if (!rsb_cache)
47 goto rsb;
48
49 return 0;
50
51rsb:
52 kmem_cache_destroy(msg_cache);
53msg:
54 kmem_cache_destroy(lkb_cache);
55lkb:
56 kmem_cache_destroy(mhandle_cache);
57mhandle:
58 kmem_cache_destroy(writequeue_cache);
59out:
60 return -ENOMEM;
61}
62
63void dlm_memory_exit(void)
64{
65 kmem_cache_destroy(writequeue_cache);
66 kmem_cache_destroy(mhandle_cache);
67 kmem_cache_destroy(msg_cache);
68 kmem_cache_destroy(lkb_cache);
69 kmem_cache_destroy(rsb_cache);
70}
71
72char *dlm_allocate_lvb(struct dlm_ls *ls)
73{
74 char *p;
75
76 p = kzalloc(ls->ls_lvblen, GFP_NOFS);
77 return p;
78}
79
80void dlm_free_lvb(char *p)
81{
82 kfree(p);
83}
84
85struct dlm_rsb *dlm_allocate_rsb(struct dlm_ls *ls)
86{
87 struct dlm_rsb *r;
88
89 r = kmem_cache_zalloc(rsb_cache, GFP_NOFS);
90 return r;
91}
92
93void dlm_free_rsb(struct dlm_rsb *r)
94{
95 if (r->res_lvbptr)
96 dlm_free_lvb(r->res_lvbptr);
97 kmem_cache_free(rsb_cache, r);
98}
99
100struct dlm_lkb *dlm_allocate_lkb(struct dlm_ls *ls)
101{
102 struct dlm_lkb *lkb;
103
104 lkb = kmem_cache_zalloc(lkb_cache, GFP_NOFS);
105 return lkb;
106}
107
108void dlm_free_lkb(struct dlm_lkb *lkb)
109{
110 if (lkb->lkb_flags & DLM_IFL_USER) {
111 struct dlm_user_args *ua;
112 ua = lkb->lkb_ua;
113 if (ua) {
114 kfree(ua->lksb.sb_lvbptr);
115 kfree(ua);
116 }
117 }
118 kmem_cache_free(lkb_cache, lkb);
119}
120
121struct dlm_mhandle *dlm_allocate_mhandle(void)
122{
123 return kmem_cache_alloc(mhandle_cache, GFP_NOFS);
124}
125
126void dlm_free_mhandle(struct dlm_mhandle *mhandle)
127{
128 kmem_cache_free(mhandle_cache, mhandle);
129}
130
131struct writequeue_entry *dlm_allocate_writequeue(void)
132{
133 return kmem_cache_alloc(writequeue_cache, GFP_ATOMIC);
134}
135
136void dlm_free_writequeue(struct writequeue_entry *writequeue)
137{
138 kmem_cache_free(writequeue_cache, writequeue);
139}
140
141struct dlm_msg *dlm_allocate_msg(gfp_t allocation)
142{
143 return kmem_cache_alloc(msg_cache, allocation);
144}
145
146void dlm_free_msg(struct dlm_msg *msg)
147{
148 kmem_cache_free(msg_cache, msg);
149}