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
19 static struct kmem_cache *writequeue_cache;
20 static struct kmem_cache *mhandle_cache;
21 static struct kmem_cache *msg_cache;
22 static struct kmem_cache *lkb_cache;
23 static struct kmem_cache *rsb_cache;
24 static struct kmem_cache *cb_cache;
25
26
dlm_memory_init(void)27 int __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
59 cb:
60 kmem_cache_destroy(rsb_cache);
61 rsb:
62 kmem_cache_destroy(msg_cache);
63 msg:
64 kmem_cache_destroy(lkb_cache);
65 lkb:
66 kmem_cache_destroy(mhandle_cache);
67 mhandle:
68 kmem_cache_destroy(writequeue_cache);
69 out:
70 return -ENOMEM;
71 }
72
dlm_memory_exit(void)73 void 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
dlm_allocate_lvb(struct dlm_ls * ls)83 char *dlm_allocate_lvb(struct dlm_ls *ls)
84 {
85 char *p;
86
87 p = kzalloc(ls->ls_lvblen, GFP_NOFS);
88 return p;
89 }
90
dlm_free_lvb(char * p)91 void dlm_free_lvb(char *p)
92 {
93 kfree(p);
94 }
95
dlm_allocate_rsb(struct dlm_ls * ls)96 struct dlm_rsb *dlm_allocate_rsb(struct dlm_ls *ls)
97 {
98 struct dlm_rsb *r;
99
100 r = kmem_cache_zalloc(rsb_cache, GFP_NOFS);
101 return r;
102 }
103
dlm_free_rsb(struct dlm_rsb * r)104 void 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
dlm_allocate_lkb(struct dlm_ls * ls)111 struct dlm_lkb *dlm_allocate_lkb(struct dlm_ls *ls)
112 {
113 struct dlm_lkb *lkb;
114
115 lkb = kmem_cache_zalloc(lkb_cache, GFP_NOFS);
116 return lkb;
117 }
118
dlm_free_lkb(struct dlm_lkb * lkb)119 void 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 /* drop references if they are set */
131 dlm_callback_set_last_ptr(&lkb->lkb_last_cast, NULL);
132 dlm_callback_set_last_ptr(&lkb->lkb_last_cb, NULL);
133
134 kmem_cache_free(lkb_cache, lkb);
135 }
136
dlm_allocate_mhandle(gfp_t allocation)137 struct dlm_mhandle *dlm_allocate_mhandle(gfp_t allocation)
138 {
139 return kmem_cache_alloc(mhandle_cache, allocation);
140 }
141
dlm_free_mhandle(struct dlm_mhandle * mhandle)142 void dlm_free_mhandle(struct dlm_mhandle *mhandle)
143 {
144 kmem_cache_free(mhandle_cache, mhandle);
145 }
146
dlm_allocate_writequeue(void)147 struct writequeue_entry *dlm_allocate_writequeue(void)
148 {
149 return kmem_cache_alloc(writequeue_cache, GFP_ATOMIC);
150 }
151
dlm_free_writequeue(struct writequeue_entry * writequeue)152 void dlm_free_writequeue(struct writequeue_entry *writequeue)
153 {
154 kmem_cache_free(writequeue_cache, writequeue);
155 }
156
dlm_allocate_msg(gfp_t allocation)157 struct dlm_msg *dlm_allocate_msg(gfp_t allocation)
158 {
159 return kmem_cache_alloc(msg_cache, allocation);
160 }
161
dlm_free_msg(struct dlm_msg * msg)162 void dlm_free_msg(struct dlm_msg *msg)
163 {
164 kmem_cache_free(msg_cache, msg);
165 }
166
dlm_allocate_cb(void)167 struct dlm_callback *dlm_allocate_cb(void)
168 {
169 return kmem_cache_alloc(cb_cache, GFP_ATOMIC);
170 }
171
dlm_free_cb(struct dlm_callback * cb)172 void dlm_free_cb(struct dlm_callback *cb)
173 {
174 kmem_cache_free(cb_cache, cb);
175 }
176