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