include/os/freebsd/zfs/sys/abd_os.h

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or https://opensource.org/licenses/CDDL-1.0.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 /*
  22  * Copyright (c) 2014 by Chunwei Chen. All rights reserved.
  23  * Copyright (c) 2016, 2019 by Delphix. All rights reserved.
  24  */
  25
  26 #ifndef _ABD_OS_H
  27 #define _ABD_OS_H
  28
  29 #ifdef _KERNEL
  30 #include <sys/vm.h>
  31 #include <vm/vm_page.h>
  32 #endif
  33
  34 #ifdef __cplusplus
  35 extern "C" {
  36 #endif
  37
  38 struct abd;
  39
  40 struct abd_scatter {
  41         uint_t          abd_offset;
  42         void            *abd_chunks[1]; /* actually variable-length */
  43 };
  44
  45 struct abd_linear {
  46         void            *abd_buf;
  47 #if defined(_KERNEL)
  48         struct sf_buf   *sf; /* for LINEAR_PAGE FreeBSD */
  49 #endif
  50 };
  51
  52 #ifdef _KERNEL
  53 __attribute__((malloc))
  54 struct abd *abd_alloc_from_pages(vm_page_t *, unsigned long, uint64_t);
  55 #endif
  56
  57 #ifdef __cplusplus
  58 }
  59 #endif
  60
  61 #endif  /* _ABD_H */