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Use the LZ4 algorithm to compress metadata when the corresponding feature is enabled


   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 #ifdef _KERNEL
  29 #include <sys/systm.h>
  30 #else
  31 #include <errno.h>
  32 #include <string.h>
  33 #endif
  34 #include <sys/debug.h>
  35 #include <sys/fs/zfs.h>
  36 #include <sys/inttypes.h>
  37 #include <sys/types.h>
  38 #include "zfeature_common.h"
  39 
  40 /*
  41  * Set to disable all feature checks while opening pools, allowing pools with
  42  * unsupported features to be opened. Set for testing only.
  43  */
  44 boolean_t zfeature_checks_disable = B_FALSE;
  45 


 152         feature->fi_activate_on_enable = activate_on_enable;
 153         feature->fi_depends = deps;
 154 }
 155 
 156 void
 157 zpool_feature_init(void)
 158 {
 159         zfeature_register(SPA_FEATURE_ASYNC_DESTROY,
 160             "com.delphix:async_destroy", "async_destroy",
 161             "Destroy filesystems asynchronously.", B_TRUE, B_FALSE,
 162             B_FALSE, NULL);
 163 
 164         zfeature_register(SPA_FEATURE_EMPTY_BPOBJ,
 165             "com.delphix:empty_bpobj", "empty_bpobj",
 166             "Snapshots use less space.", B_TRUE, B_FALSE,
 167             B_FALSE, NULL);
 168 
 169         zfeature_register(SPA_FEATURE_LZ4_COMPRESS,
 170             "org.illumos:lz4_compress", "lz4_compress",
 171             "LZ4 compression algorithm support.", B_FALSE, B_FALSE,
 172             B_FALSE, NULL);
 173 
 174         zfeature_register(SPA_FEATURE_MULTI_VDEV_CRASH_DUMP,
 175             "com.joyent:multi_vdev_crash_dump", "multi_vdev_crash_dump",
 176             "Crash dumps to multiple vdev pools.", B_FALSE, B_FALSE,
 177             B_FALSE, NULL);
 178 
 179         zfeature_register(SPA_FEATURE_SPACEMAP_HISTOGRAM,
 180             "com.delphix:spacemap_histogram", "spacemap_histogram",
 181             "Spacemaps maintain space histograms.", B_TRUE, B_FALSE,
 182             B_FALSE, NULL);
 183 
 184         zfeature_register(SPA_FEATURE_ENABLED_TXG,
 185             "com.delphix:enabled_txg", "enabled_txg",
 186             "Record txg at which a feature is enabled", B_TRUE, B_FALSE,
 187             B_FALSE, NULL);
 188 
 189         static spa_feature_t hole_birth_deps[] = { SPA_FEATURE_ENABLED_TXG,
 190             SPA_FEATURE_NONE };
 191         zfeature_register(SPA_FEATURE_HOLE_BIRTH,
 192             "com.delphix:hole_birth", "hole_birth",




   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  * Copyright (c) 2014, Nexenta Systems, Inc. All rights reserved.
  27  */
  28 
  29 #ifdef _KERNEL
  30 #include <sys/systm.h>
  31 #else
  32 #include <errno.h>
  33 #include <string.h>
  34 #endif
  35 #include <sys/debug.h>
  36 #include <sys/fs/zfs.h>
  37 #include <sys/inttypes.h>
  38 #include <sys/types.h>
  39 #include "zfeature_common.h"
  40 
  41 /*
  42  * Set to disable all feature checks while opening pools, allowing pools with
  43  * unsupported features to be opened. Set for testing only.
  44  */
  45 boolean_t zfeature_checks_disable = B_FALSE;
  46 


 153         feature->fi_activate_on_enable = activate_on_enable;
 154         feature->fi_depends = deps;
 155 }
 156 
 157 void
 158 zpool_feature_init(void)
 159 {
 160         zfeature_register(SPA_FEATURE_ASYNC_DESTROY,
 161             "com.delphix:async_destroy", "async_destroy",
 162             "Destroy filesystems asynchronously.", B_TRUE, B_FALSE,
 163             B_FALSE, NULL);
 164 
 165         zfeature_register(SPA_FEATURE_EMPTY_BPOBJ,
 166             "com.delphix:empty_bpobj", "empty_bpobj",
 167             "Snapshots use less space.", B_TRUE, B_FALSE,
 168             B_FALSE, NULL);
 169 
 170         zfeature_register(SPA_FEATURE_LZ4_COMPRESS,
 171             "org.illumos:lz4_compress", "lz4_compress",
 172             "LZ4 compression algorithm support.", B_FALSE, B_FALSE,
 173             B_TRUE, NULL);
 174 
 175         zfeature_register(SPA_FEATURE_MULTI_VDEV_CRASH_DUMP,
 176             "com.joyent:multi_vdev_crash_dump", "multi_vdev_crash_dump",
 177             "Crash dumps to multiple vdev pools.", B_FALSE, B_FALSE,
 178             B_FALSE, NULL);
 179 
 180         zfeature_register(SPA_FEATURE_SPACEMAP_HISTOGRAM,
 181             "com.delphix:spacemap_histogram", "spacemap_histogram",
 182             "Spacemaps maintain space histograms.", B_TRUE, B_FALSE,
 183             B_FALSE, NULL);
 184 
 185         zfeature_register(SPA_FEATURE_ENABLED_TXG,
 186             "com.delphix:enabled_txg", "enabled_txg",
 187             "Record txg at which a feature is enabled", B_TRUE, B_FALSE,
 188             B_FALSE, NULL);
 189 
 190         static spa_feature_t hole_birth_deps[] = { SPA_FEATURE_ENABLED_TXG,
 191             SPA_FEATURE_NONE };
 192         zfeature_register(SPA_FEATURE_HOLE_BIRTH,
 193             "com.delphix:hole_birth", "hole_birth",