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
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
73 void dlm_memory_exit(void)
74 {
75 rcu_barrier();
76
77 kmem_cache_destroy(writequeue_cache);
78 kmem_cache_destroy(mhandle_cache);
79 kmem_cache_destroy(msg_cache);
80 kmem_cache_destroy(lkb_cache);
81 kmem_cache_destroy(rsb_cache);
82 kmem_cache_destroy(cb_cache);
83 }
84
85 char *dlm_allocate_lvb(struct dlm_ls *ls)
86 {
87 char *p;
88
89 p = kzalloc(ls->ls_lvblen, GFP_ATOMIC);
90 return p;
91 }
92
93 void dlm_free_lvb(char *p)
94 {
95 kfree(p);
96 }
97
98 struct dlm_rsb *dlm_allocate_rsb(struct dlm_ls *ls)
99 {
100 struct dlm_rsb *r;
101
102 r = kmem_cache_zalloc(rsb_cache, GFP_ATOMIC);
103 return r;
104 }
105
106 static void __free_rsb_rcu(struct rcu_head *rcu)
107 {
108 struct dlm_rsb *r = container_of(rcu, struct dlm_rsb, rcu);
109 if (r->res_lvbptr)
110 dlm_free_lvb(r->res_lvbptr);
111 kmem_cache_free(rsb_cache, r);
112 }
113
114 void dlm_free_rsb(struct dlm_rsb *r)
115 {
116 call_rcu(&r->rcu, __free_rsb_rcu);
117 }
118
119 struct dlm_lkb *dlm_allocate_lkb(struct dlm_ls *ls)
120 {
121 struct dlm_lkb *lkb;
122
123 lkb = kmem_cache_zalloc(lkb_cache, GFP_ATOMIC);
124 return lkb;
125 }
126
127 void dlm_free_lkb(struct dlm_lkb *lkb)
128 {
129 if (test_bit(DLM_DFL_USER_BIT, &lkb->lkb_dflags)) {
130 struct dlm_user_args *ua;
131 ua = lkb->lkb_ua;
132 if (ua) {
133 kfree(ua->lksb.sb_lvbptr);
134 kfree(ua);
135 }
136 }
137
138 kmem_cache_free(lkb_cache, lkb);
139 }
140
141 struct dlm_mhandle *dlm_allocate_mhandle(void)
142 {
143 return kmem_cache_alloc(mhandle_cache, GFP_ATOMIC);
144 }
145
146 void dlm_free_mhandle(struct dlm_mhandle *mhandle)
147 {
148 kmem_cache_free(mhandle_cache, mhandle);
149 }
150
151 struct writequeue_entry *dlm_allocate_writequeue(void)
152 {
153 return kmem_cache_alloc(writequeue_cache, GFP_ATOMIC);
154 }
155
156 void dlm_free_writequeue(struct writequeue_entry *writequeue)
157 {
158 kmem_cache_free(writequeue_cache, writequeue);
159 }
160
161 struct dlm_msg *dlm_allocate_msg(void)
162 {
163 return kmem_cache_alloc(msg_cache, GFP_ATOMIC);
164 }
165
166 void dlm_free_msg(struct dlm_msg *msg)
167 {
168 kmem_cache_free(msg_cache, msg);
169 }
170
171 struct dlm_callback *dlm_allocate_cb(void)
172 {
173 return kmem_cache_alloc(cb_cache, GFP_ATOMIC);
174 }
175
176 void dlm_free_cb(struct dlm_callback *cb)
177 {
178 kmem_cache_free(cb_cache, cb);
179 }
180
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