include/sys/dkioc_free_util.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  *  For details, see <http://zfsonlinux.org/>.
  10  *
  11  *  The SPL is free software; you can redistribute it and/or modify it
  12  *  under the terms of the GNU General Public License as published by the
  13  *  Free Software Foundation; either version 2 of the License, or (at your
  14  *  option) any later version.
  15  *
  16  *  The SPL is distributed in the hope that it will be useful, but WITHOUT
  17  *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  18  *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  19  *  for more details.
  20  *
  21  *  You should have received a copy of the GNU General Public License along
  22  *  with the SPL.  If not, see <http://www.gnu.org/licenses/>.
  23  */
  24
  25 #ifndef _SPL_DKIOC_UTIL_H
  26 #define _SPL_DKIOC_UTIL_H
  27
  28 #include <sys/dkio.h>
  29
  30 typedef struct dkioc_free_list_ext_s {
  31         uint64_t                dfle_start;
  32         uint64_t                dfle_length;
  33 } dkioc_free_list_ext_t;
  34
  35 typedef struct dkioc_free_list_s {
  36         uint64_t                dfl_flags;
  37         uint64_t                dfl_num_exts;
  38         int64_t                 dfl_offset;
  39
  40         /*
  41          * N.B. this is only an internal debugging API! This is only called
  42          * from debug builds of sd for pre-release checking. Remove before GA!
  43          */
  44         void                    (*dfl_ck_func)(uint64_t, uint64_t, void *);
  45         void                    *dfl_ck_arg;
  46
  47         dkioc_free_list_ext_t   dfl_exts[1];
  48 } dkioc_free_list_t;
  49
  50 static inline void dfl_free(dkioc_free_list_t *dfl) {
  51         vmem_free(dfl, DFL_SZ(dfl->dfl_num_exts));
  52 }
  53
  54 static inline dkioc_free_list_t *dfl_alloc(uint64_t dfl_num_exts, int flags) {
  55         return vmem_zalloc(DFL_SZ(dfl_num_exts), flags);
  56 }
  57
  58 #endif /* _SPL_DKIOC_UTIL_H */