cstyle fixes
dsl_dataset_set_fsid_guid should use ZFS_SPACE_CHECK_RESERVED
dsl_dataset_set_fsid_guid _check and _sync func declared static,
removed from dsl_dataset.h
rewrite unique_valid
6333 ZFS should let the user specify or modify the fsid_guid of a dataset

          --- old/usr/src/uts/common/fs/zfs/sys/unique.h
          +++ new/usr/src/uts/common/fs/zfs/sys/unique.h

   1    1  /*
   2    2   * CDDL HEADER START
   3    3   *
   4    4   * The contents of this file are subject to the terms of the
   5    5   * Common Development and Distribution License (the "License").
   6    6   * You may not use this file except in compliance with the License.
   7    7   *
   8    8   * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9    9   * or http://www.opensolaris.org/os/licensing.
  10   10   * See the License for the specific language governing permissions
  11   11   * and limitations under the License.
  12   12   *
  13   13   * When distributing Covered Code, include this CDDL HEADER in each
  14   14   * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15   15   * If applicable, add the following below this CDDL HEADER, with the
  16   16   * fields enclosed by brackets "[]" replaced with your own identifying
  17   17   * information: Portions Copyright [yyyy] [name of copyright owner]
  18   18   *
  19   19   * CDDL HEADER END
  20   20   */
  21   21  /*
  22   22   * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
  23   23   * Use is subject to license terms.
  24   24   */
  25   25  
  26   26  #ifndef _SYS_UNIQUE_H
  27   27  #define _SYS_UNIQUE_H
  28   28  
  29   29  #include <sys/zfs_context.h>
  30   30  
  31   31  #ifdef  __cplusplus
  32   32  extern "C" {
  33   33  #endif
  34   34  
  35   35  /* The number of significant bits in each unique value. */
  36   36  #define UNIQUE_BITS     56
  37   37  
  38   38  void unique_init(void);
  39   39  void unique_fini(void);

  40   40  
  41   41  /*
  42   42   * Return a new unique value (which will not be uniquified against until
  43   43   * it is unique_insert()-ed).
  44   44   */
  45   45  uint64_t unique_create(void);
  46   46  
  47   47  /* Return a unique value, which equals the one passed in if possible. */
  48   48  uint64_t unique_insert(uint64_t value);
  49   49  
       50 +/*
       51 + * Return B_TRUE if the passed value does not exist and is valid,
       52 + * B_FALSE otherwise
       53 + */
       54 +boolean_t unique_valid(uint64_t value);
       55 +
  50   56  /* Indicate that this value no longer needs to be uniquified against. */
  51   57  void unique_remove(uint64_t value);
  52   58  
  53   59  #ifdef  __cplusplus
  54   60  }
  55   61  #endif
  56   62  
  57   63  #endif /* _SYS_UNIQUE_H */
    

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