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 /*
  23  * Copyright (c) 2012 by Delphix. All rights reserved.
  24  * Copyright (c) 2013 by Saso Kiselkov. All rights reserved.
  25  */
  26 
  27 #ifndef _ZFEATURE_COMMON_H
  28 #define _ZFEATURE_COMMON_H
  29 
  30 #include <sys/fs/zfs.h>
  31 #include <sys/inttypes.h>
  32 #include <sys/types.h>
  33 
  34 #ifdef  __cplusplus
  35 extern "C" {
  36 #endif
  37 
  38 struct zfeature_info;
  39 
  40 typedef struct zfeature_info {
  41         const char *fi_uname;   /* User-facing feature name */
  42         const char *fi_guid;    /* On-disk feature identifier */
  43         const char *fi_desc;    /* Feature description */
  44         boolean_t fi_can_readonly; /* Can open pool readonly w/o support? */
  45         boolean_t fi_mos;       /* Is the feature necessary to read the MOS? */
  46         struct zfeature_info **fi_depends; /* array; null terminated */
  47 } zfeature_info_t;
  48 
  49 typedef int (zfeature_func_t)(zfeature_info_t *fi, void *arg);
  50 
  51 #define ZFS_FEATURE_DEBUG
  52 
  53 enum spa_feature {
  54         SPA_FEATURE_ASYNC_DESTROY,
  55         SPA_FEATURE_EMPTY_BPOBJ,
  56         SPA_FEATURE_LZ4_COMPRESS,
  57         SPA_FEATURES
  58 } spa_feature_t;
  59 
  60 extern zfeature_info_t spa_feature_table[SPA_FEATURES];
  61 
  62 extern boolean_t zfeature_is_valid_guid(const char *);
  63 
  64 extern boolean_t zfeature_is_supported(const char *);
  65 extern int zfeature_lookup_guid(const char *, zfeature_info_t **res);
  66 extern int zfeature_lookup_name(const char *, zfeature_info_t **res);
  67 
  68 extern void zpool_feature_init(void);
  69 
  70 #ifdef  __cplusplus
  71 }
  72 #endif
  73 
  74 #endif  /* _ZFEATURE_COMMON_H */