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 
18 static struct kmem_cache *writequeue_cache;
19 static struct kmem_cache *mhandle_cache;
20 static struct kmem_cache *msg_cache;
21 static struct kmem_cache *lkb_cache;
22 static struct kmem_cache *rsb_cache;
23 
24 
dlm_memory_init(void)25 int __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 
51 rsb:
52 	kmem_cache_destroy(msg_cache);
53 msg:
54 	kmem_cache_destroy(lkb_cache);
55 lkb:
56 	kmem_cache_destroy(mhandle_cache);
57 mhandle:
58 	kmem_cache_destroy(writequeue_cache);
59 out:
60 	return -ENOMEM;
61 }
62 
dlm_memory_exit(void)63 void 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 
dlm_allocate_lvb(struct dlm_ls * ls)72 char *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 
dlm_free_lvb(char * p)80 void dlm_free_lvb(char *p)
81 {
82 	kfree(p);
83 }
84 
dlm_allocate_rsb(struct dlm_ls * ls)85 struct 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 
dlm_free_rsb(struct dlm_rsb * r)93 void 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 
dlm_allocate_lkb(struct dlm_ls * ls)100 struct 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 
dlm_free_lkb(struct dlm_lkb * lkb)108 void 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 
dlm_allocate_mhandle(void)121 struct dlm_mhandle *dlm_allocate_mhandle(void)
122 {
123 	return kmem_cache_alloc(mhandle_cache, GFP_NOFS);
124 }
125 
dlm_free_mhandle(struct dlm_mhandle * mhandle)126 void dlm_free_mhandle(struct dlm_mhandle *mhandle)
127 {
128 	kmem_cache_free(mhandle_cache, mhandle);
129 }
130 
dlm_allocate_writequeue(void)131 struct writequeue_entry *dlm_allocate_writequeue(void)
132 {
133 	return kmem_cache_alloc(writequeue_cache, GFP_ATOMIC);
134 }
135 
dlm_free_writequeue(struct writequeue_entry * writequeue)136 void dlm_free_writequeue(struct writequeue_entry *writequeue)
137 {
138 	kmem_cache_free(writequeue_cache, writequeue);
139 }
140 
dlm_allocate_msg(gfp_t allocation)141 struct dlm_msg *dlm_allocate_msg(gfp_t allocation)
142 {
143 	return kmem_cache_alloc(msg_cache, allocation);
144 }
145 
dlm_free_msg(struct dlm_msg * msg)146 void dlm_free_msg(struct dlm_msg *msg)
147 {
148 	kmem_cache_free(msg_cache, msg);
149 }
150