241b541574
5959 clean up per-dataset feature count code Reviewed by: Toomas Soome <tsoome@me.com> Reviewed by: George Wilson <george@delphix.com> Reviewed by: Alex Reece <alex@delphix.com> Approved by: Richard Lowe <richlowe@richlowe.net> References: https://www.illumos.org/issues/5959 https://github.com/illumos/illumos-gate/commit/ca0cc39 Porting notes: illumos code doesn't check for feature_get_refcount() returning ENOTSUP (which means feature is disabled) in zdb. zfsonlinux added a check in https://github.com/zfsonlinux/zfs/commit/784652c due to #3468. The check was reintroduced here. Ported-by: Witaut Bajaryn <vitaut.bayaryn@gmail.com> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Closes #3965
98 lines
2.8 KiB
C
98 lines
2.8 KiB
C
/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License (the "License").
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* You may not use this file except in compliance with the License.
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*
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* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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* or http://www.opensolaris.org/os/licensing.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information: Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*/
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/*
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* Copyright (c) 2011, 2015 by Delphix. All rights reserved.
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* Copyright (c) 2013 by Saso Kiselkov. All rights reserved.
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*/
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#ifndef _ZFEATURE_COMMON_H
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#define _ZFEATURE_COMMON_H
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#include <sys/fs/zfs.h>
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#include <sys/inttypes.h>
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#include <sys/types.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct zfeature_info;
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typedef enum spa_feature {
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SPA_FEATURE_NONE = -1,
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SPA_FEATURE_ASYNC_DESTROY,
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SPA_FEATURE_EMPTY_BPOBJ,
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SPA_FEATURE_LZ4_COMPRESS,
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SPA_FEATURE_SPACEMAP_HISTOGRAM,
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SPA_FEATURE_ENABLED_TXG,
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SPA_FEATURE_HOLE_BIRTH,
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SPA_FEATURE_EXTENSIBLE_DATASET,
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SPA_FEATURE_EMBEDDED_DATA,
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SPA_FEATURE_BOOKMARKS,
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SPA_FEATURE_FS_SS_LIMIT,
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SPA_FEATURE_LARGE_BLOCKS,
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SPA_FEATURES
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} spa_feature_t;
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#define SPA_FEATURE_DISABLED (-1ULL)
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typedef enum zfeature_flags {
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/* Can open pool readonly even if this feature is not supported. */
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ZFEATURE_FLAG_READONLY_COMPAT = (1 << 0),
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/* Is this feature necessary to read the MOS? */
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ZFEATURE_FLAG_MOS = (1 << 1),
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/* Activate this feature at the same time it is enabled. */
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ZFEATURE_FLAG_ACTIVATE_ON_ENABLE = (1 << 2),
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/* Each dataset has a field set if it has ever used this feature. */
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ZFEATURE_FLAG_PER_DATASET = (1 << 3)
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} zfeature_flags_t;
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typedef struct zfeature_info {
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spa_feature_t fi_feature;
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const char *fi_uname; /* User-facing feature name */
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const char *fi_guid; /* On-disk feature identifier */
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const char *fi_desc; /* Feature description */
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zfeature_flags_t fi_flags;
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/* array of dependencies, terminated by SPA_FEATURE_NONE */
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const spa_feature_t *fi_depends;
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} zfeature_info_t;
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typedef int (zfeature_func_t)(zfeature_info_t *, void *);
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#define ZFS_FEATURE_DEBUG
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extern zfeature_info_t spa_feature_table[SPA_FEATURES];
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extern boolean_t zfeature_is_valid_guid(const char *);
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extern boolean_t zfeature_is_supported(const char *);
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extern int zfeature_lookup_name(const char *, spa_feature_t *);
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extern boolean_t zfeature_depends_on(spa_feature_t, spa_feature_t);
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extern void zpool_feature_init(void);
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#ifdef __cplusplus
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}
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#endif
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#endif /* _ZFEATURE_COMMON_H */
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