include/sys/vdev_disk.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 http://www.opensolaris.org/os/licensing.
  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) 2008-2010 Lawrence Livermore National Security, LLC.
  23  * Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
  24  * Written by Brian Behlendorf <behlendorf1@llnl.gov>.
  25  * LLNL-CODE-403049.
  26  */
  27
  28 #ifndef _SYS_VDEV_DISK_H
  29 #define _SYS_VDEV_DISK_H
  30
  31 #ifdef  __cplusplus
  32 extern "C" {
  33 #endif
  34
  35 #ifdef _KERNEL
  36 #include <sys/vdev.h>
  37 #include <sys/ddi.h>
  38 #include <sys/sunldi.h>
  39 #include <sys/sunddi.h>
  40
  41 typedef struct vdev_disk {
  42         ddi_devid_t             vd_devid;
  43         char                    *vd_minor;
  44         struct block_device     *vd_bdev;
  45 } vdev_disk_t;
  46
  47 extern int vdev_disk_physio(struct block_device *, caddr_t,
  48                             size_t, uint64_t, int);
  49 extern int vdev_disk_read_rootlabel(char *, char *, nvlist_t **);
  50
  51 /* 2.6.24 API change */
  52 #ifdef HAVE_2ARGS_BIO_END_IO_T
  53 # define BIO_END_IO_PROTO(fn, x, y, z)  static void fn(struct bio *x, int z)
  54 # define BIO_END_IO_RETURN(rc)          return
  55 #else
  56 # define BIO_END_IO_PROTO(fn, x, y, z)  static int fn(struct bio *x, \
  57                                                       unsigned int y, int z)
  58 # define BIO_END_IO_RETURN(rc)          return rc
  59 #endif /* HAVE_2ARGS_BIO_END_IO_T */
  60
  61 /* 2.6.28 API change */
  62 #ifdef HAVE_OPEN_BDEV_EXCLUSIVE
  63 # define vdev_bdev_open(path, md, hld)  open_bdev_exclusive(path, md, hld)
  64 # define vdev_bdev_close(bdev, md)      close_bdev_exclusive(bdev, md)
  65 #else
  66 # define vdev_bdev_open(path, md, hld)  open_bdev_excl(path, md, hld)
  67 # define vdev_bdev_close(bdev, md)      close_bdev_excl(bdev)
  68 #endif /* HAVE_OPEN_BDEV_EXCLUSIVE */
  69
  70 /* 2.6.22 API change */
  71 #ifdef HAVE_1ARG_INVALIDATE_BDEV
  72 # define vdev_bdev_invalidate(bdev)     invalidate_bdev(bdev)
  73 #else
  74 # define vdev_bdev_invalidate(bdev)     invalidate_bdev(bdev, 1)
  75 #endif /* HAVE_1ARG_INVALIDATE_BDEV */
  76
  77 /* 2.6.30 API change */
  78 #ifdef HAVE_BDEV_LOGICAL_BLOCK_SIZE
  79 # define vdev_bdev_block_size(bdev)     bdev_logical_block_size(bdev)
  80 #else
  81 # define vdev_bdev_block_size(bdev)     bdev_hardsect_size(bdev)
  82 #endif
  83
  84 /* Default Linux IO Scheduler */
  85 #define VDEV_SCHEDULER                  "noop"
  86
  87 #endif /* _KERNEL */
  88
  89 #ifdef  __cplusplus
  90 }
  91 #endif
  92
  93 #endif  /* _SYS_VDEV_DISK_H */