include/os/linux/spl/sys/dkio.h

   1 /*
   2  *  Copyright (C) 2007-2010 Lawrence Livermore National Security, LLC.
   3  *  Copyright (C) 2007 The Regents of the University of California.
   4  *  Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
   5  *  Written by Brian Behlendorf <behlendorf1@llnl.gov>.
   6  *  UCRL-CODE-235197
   7  *
   8  *  This file is part of the SPL, Solaris Porting Layer.
   9  *
  10  *  The SPL is free software; you can redistribute it and/or modify it
  11  *  under the terms of the GNU General Public License as published by the
  12  *  Free Software Foundation; either version 2 of the License, or (at your
  13  *  option) any later version.
  14  *
  15  *  The SPL is distributed in the hope that it will be useful, but WITHOUT
  16  *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  17  *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  18  *  for more details.
  19  *
  20  *  You should have received a copy of the GNU General Public License along
  21  *  with the SPL.  If not, see <http://www.gnu.org/licenses/>.
  22  */
  23
  24 #ifndef _SPL_DKIO_H
  25 #define _SPL_DKIO_H
  26
  27 #define DFL_SZ(num_exts) \
  28         (sizeof (dkioc_free_list_t) + (num_exts - 1) * 16)
  29
  30 #define DKIOC           (0x04 << 8)
  31 #define DKIOCFLUSHWRITECACHE    (DKIOC|34)      /* flush cache to phys medium */
  32
  33 /*
  34  * ioctl to free space (e.g. SCSI UNMAP) off a disk.
  35  * Pass a dkioc_free_list_t containing a list of extents to be freed.
  36  */
  37 #define DKIOCFREE       (DKIOC|50)
  38
  39 #endif /* _SPL_DKIO_H */