fs/dlm/memory.c

   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 }