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 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 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 91 void dlm_free_lvb(char *p) 92 { 93 kfree(p); 94 } 95 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 } 103 104 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 } 110 111 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 } 118 119 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 } 136 137 struct dlm_mhandle *dlm_allocate_mhandle(gfp_t allocation) 138 { 139 return kmem_cache_alloc(mhandle_cache, allocation); 140 } 141 142 void dlm_free_mhandle(struct dlm_mhandle *mhandle) 143 { 144 kmem_cache_free(mhandle_cache, mhandle); 145 } 146 147 struct writequeue_entry *dlm_allocate_writequeue(void) 148 { 149 return kmem_cache_alloc(writequeue_cache, GFP_ATOMIC); 150 } 151 152 void dlm_free_writequeue(struct writequeue_entry *writequeue) 153 { 154 kmem_cache_free(writequeue_cache, writequeue); 155 } 156 157 struct dlm_msg *dlm_allocate_msg(gfp_t allocation) 158 { 159 return kmem_cache_alloc(msg_cache, allocation); 160 } 161 162 void dlm_free_msg(struct dlm_msg *msg) 163 { 164 kmem_cache_free(msg_cache, msg); 165 } 166 167 struct dlm_callback *dlm_allocate_cb(void) 168 { 169 return kmem_cache_alloc(cb_cache, GFP_ATOMIC); 170 } 171 172 void dlm_free_cb(struct dlm_callback *cb) 173 { 174 kmem_cache_free(cb_cache, cb); 175 } 176