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         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 }