include/os/freebsd/spl/sys/kmem_cache.h

   1 /*
   2  * Copyright (c) 2020 iXsystems, Inc.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
  15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
  18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  *
  26  * $FreeBSD$
  27  */
  28
  29
  30 #ifndef _SPL_KMEM_CACHE_H
  31 #define _SPL_KMEM_CACHE_H
  32
  33 #ifdef _KERNEL
  34 #include <sys/taskq.h>
  35
  36 /* kmem move callback return values */
  37 typedef enum kmem_cbrc {
  38         KMEM_CBRC_YES           = 0,    /* Object moved */
  39         KMEM_CBRC_NO            = 1,    /* Object not moved */
  40         KMEM_CBRC_LATER         = 2,    /* Object not moved, try again later */
  41         KMEM_CBRC_DONT_NEED     = 3,    /* Neither object is needed */
  42         KMEM_CBRC_DONT_KNOW     = 4,    /* Object unknown */
  43 } kmem_cbrc_t;
  44
  45 extern void spl_kmem_cache_set_move(kmem_cache_t *,
  46     kmem_cbrc_t (*)(void *, void *, size_t, void *));
  47
  48 #define kmem_cache_set_move(skc, move)  spl_kmem_cache_set_move(skc, move)
  49
  50 #endif /* _KERNEL */
  51
  52 #endif