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) 2013 by Delphix. All rights reserved.
  24  * Copyright (c) 2013 by Saso Kiselkov. All rights reserved.
  25  * Copyright (c) 2013, Joyent, Inc. All rights reserved.
  26  */
  27 
  28 #ifndef _ZFEATURE_COMMON_H
  29 #define _ZFEATURE_COMMON_H
  30 
  31 #include <sys/fs/zfs.h>
  32 #include <sys/inttypes.h>
  33 #include <sys/types.h>
  34 
  35 #ifdef  __cplusplus
  36 extern "C" {
  37 #endif
  38 
  39 struct zfeature_info;
  40 
  41 typedef struct zfeature_info {
  42         const char *fi_uname;   /* User-facing feature name */
  43         const char *fi_guid;    /* On-disk feature identifier */
  44         const char *fi_desc;    /* Feature description */
  45         boolean_t fi_can_readonly; /* Can open pool readonly w/o support? */
  46         boolean_t fi_mos;       /* Is the feature necessary to read the MOS? */
  47         struct zfeature_info **fi_depends; /* array; null terminated */
  48 } zfeature_info_t;
  49 
  50 typedef int (zfeature_func_t)(zfeature_info_t *fi, void *arg);
  51 
  52 #define ZFS_FEATURE_DEBUG
  53 
  54 enum spa_feature {
  55         SPA_FEATURE_ASYNC_DESTROY,
  56         SPA_FEATURE_EMPTY_BPOBJ,
  57         SPA_FEATURE_LZ4_COMPRESS,
  58         SPA_FEATURE_MULTI_VDEV_CRASH_DUMP,
  59         SPA_FEATURE_SPACEMAP_HISTOGRAM,
  60         SPA_FEATURES
  61 } spa_feature_t;
  62 
  63 extern zfeature_info_t spa_feature_table[SPA_FEATURES];
  64 
  65 extern boolean_t zfeature_is_valid_guid(const char *);
  66 
  67 extern boolean_t zfeature_is_supported(const char *);
  68 extern int zfeature_lookup_guid(const char *, zfeature_info_t **res);
  69 extern int zfeature_lookup_name(const char *, zfeature_info_t **res);
  70 
  71 extern void zpool_feature_init(void);
  72 
  73 #ifdef  __cplusplus
  74 }
  75 #endif
  76 
  77 #endif  /* _ZFEATURE_COMMON_H */