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This extends our sysfs '/sys/module/zfs' entry to include feature and property attributes. The primary consumer of this information is user processes, like the zfs CLI, that need to know what the current loaded ZFS module supports. The libzfs binary will consult this information when instantiating the zfs and zpool property tables and the pool features table. This introduces 4 kernel objects (dirs) into '/sys/module/zfs' with corresponding attributes (files): features.runtime features.pool properties.dataset properties.pool Reviewed-by: Matthew Ahrens <mahrens@delphix.com> Reviewed-by: Tony Hutter <hutter2@llnl.gov> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Don Brady <don.brady@delphix.com> Closes #7706
134 lines
4.4 KiB
C
134 lines
4.4 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 2010 Sun Microsystems, Inc. All rights reserved.
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* Use is subject to license terms.
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*/
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#ifndef _ZFS_PROP_H
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#define _ZFS_PROP_H
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#include <sys/fs/zfs.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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/*
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* For index types (e.g. compression and checksum), we want the numeric value
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* in the kernel, but the string value in userland.
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*/
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typedef enum {
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PROP_TYPE_NUMBER, /* numeric value */
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PROP_TYPE_STRING, /* string value */
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PROP_TYPE_INDEX /* numeric value indexed by string */
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} zprop_type_t;
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typedef enum {
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PROP_DEFAULT,
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PROP_READONLY,
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PROP_INHERIT,
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/*
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* ONETIME properties are a sort of conglomeration of READONLY
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* and INHERIT. They can be set only during object creation,
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* after that they are READONLY. If not explicitly set during
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* creation, they can be inherited. ONETIME_DEFAULT properties
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* work the same way, but they will default instead of
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* inheriting a value.
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*/
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PROP_ONETIME,
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PROP_ONETIME_DEFAULT
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} zprop_attr_t;
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typedef struct zfs_index {
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const char *pi_name;
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uint64_t pi_value;
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} zprop_index_t;
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typedef struct {
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const char *pd_name; /* human-readable property name */
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int pd_propnum; /* property number */
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zprop_type_t pd_proptype; /* string, boolean, index, number */
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const char *pd_strdefault; /* default for strings */
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uint64_t pd_numdefault; /* for boolean / index / number */
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zprop_attr_t pd_attr; /* default, readonly, inherit */
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int pd_types; /* bitfield of valid dataset types */
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/* fs | vol | snap; or pool */
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const char *pd_values; /* string telling acceptable values */
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const char *pd_colname; /* column header for "zfs list" */
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boolean_t pd_rightalign; /* column alignment for "zfs list" */
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boolean_t pd_visible; /* do we list this property with the */
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/* "zfs get" help message */
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boolean_t pd_zfs_mod_supported; /* supported by running zfs module */
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const zprop_index_t *pd_table; /* for index properties, a table */
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/* defining the possible values */
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size_t pd_table_size; /* number of entries in pd_table[] */
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} zprop_desc_t;
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/*
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* zfs dataset property functions
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*/
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void zfs_prop_init(void);
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zprop_type_t zfs_prop_get_type(zfs_prop_t);
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boolean_t zfs_prop_delegatable(zfs_prop_t prop);
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zprop_desc_t *zfs_prop_get_table(void);
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/*
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* zpool property functions
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*/
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void zpool_prop_init(void);
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zprop_type_t zpool_prop_get_type(zpool_prop_t);
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zprop_desc_t *zpool_prop_get_table(void);
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/*
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* Common routines to initialize property tables
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*/
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void zprop_register_impl(int, const char *, zprop_type_t, uint64_t,
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const char *, zprop_attr_t, int, const char *, const char *,
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boolean_t, boolean_t, const zprop_index_t *);
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void zprop_register_string(int, const char *, const char *,
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zprop_attr_t attr, int, const char *, const char *);
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void zprop_register_number(int, const char *, uint64_t, zprop_attr_t, int,
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const char *, const char *);
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void zprop_register_index(int, const char *, uint64_t, zprop_attr_t, int,
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const char *, const char *, const zprop_index_t *);
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void zprop_register_hidden(int, const char *, zprop_type_t, zprop_attr_t,
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int, const char *);
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/*
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* Common routines for zfs and zpool property management
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*/
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int zprop_iter_common(zprop_func, void *, boolean_t, boolean_t, zfs_type_t);
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int zprop_name_to_prop(const char *, zfs_type_t);
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int zprop_string_to_index(int, const char *, uint64_t *, zfs_type_t);
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int zprop_index_to_string(int, uint64_t, const char **, zfs_type_t);
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uint64_t zprop_random_value(int, uint64_t, zfs_type_t);
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const char *zprop_values(int, zfs_type_t);
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size_t zprop_width(int, boolean_t *, zfs_type_t);
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boolean_t zprop_valid_for_type(int, zfs_type_t, boolean_t);
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#ifdef __cplusplus
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}
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#endif
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#endif /* _ZFS_PROP_H */
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