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// SPDX-License-Identifier: CDDL-1.0
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or https://opensource.org/licenses/CDDL-1.0.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (C) 2016 Gvozden Neskovic <neskovic@gmail.com>.
* Copyright (c) 2020 by Delphix. All rights reserved.
*/
#ifndef _MOD_COMPAT_H
#define _MOD_COMPAT_H
#include <linux/module.h>
#include <linux/moduleparam.h>
typedef const struct kernel_param zfs_kernel_param_t;
#define ZMOD_RW 0644
#define ZMOD_RD 0444
enum scope_prefix_types {
zfs,
zfs_arc,
zfs_brt,
zfs_condense,
zfs_dbuf,
zfs_dbuf_cache,
zfs_deadman,
zfs_dedup,
zfs_l2arc,
zfs_livelist,
zfs_livelist_condense,
zfs_lua,
zfs_metaslab,
zfs_mg,
zfs_multihost,
zfs_prefetch,
zfs_reconstruct,
zfs_recv,
zfs_send,
zfs_spa,
zfs_trim,
zfs_txg,
zfs_vdev,
zfs_vdev_disk,
zfs_vdev_file,
zfs_vdev_mirror,
zfs_vnops,
zfs_zevent,
zfs_zio,
zfs_zil
};
/*
* Our uint64 params are called U64 in part because we had them before Linux
* provided ULLONG param ops. Now it does, and we use them, but we retain the
* U64 name to keep many existing tunables working without issue.
*/
#define spl_param_set_u64 param_set_ullong
#define spl_param_get_u64 param_get_ullong
#define spl_param_ops_U64 param_ops_ullong
/*
* We keep our own names for param ops to make expanding them in
* ZFS_MODULE_PARAM easy.
*/
#define spl_param_ops_INT param_ops_int
#define spl_param_ops_LONG param_ops_long
#define spl_param_ops_UINT param_ops_uint
#define spl_param_ops_ULONG param_ops_ulong
#define spl_param_ops_STRING param_ops_charp
/*
* Declare a module parameter / sysctl node
*
* "scope_prefix" the part of the sysctl / sysfs tree the node resides under
* (currently a no-op on Linux)
* "name_prefix" the part of the variable name that will be excluded from the
* exported names on platforms with a hierarchical namespace
* "name" the part of the variable that will be exposed on platforms with a
* hierarchical namespace, or as name_prefix ## name on Linux
* "type" the variable type
* "perm" the permissions (read/write or read only)
* "desc" a brief description of the option
*
* Examples:
* ZFS_MODULE_PARAM(zfs_vdev_mirror, zfs_vdev_mirror_, rotating_inc, UINT,
* ZMOD_RW, "Rotating media load increment for non-seeking I/O's");
* on FreeBSD:
* vfs.zfs.vdev.mirror.rotating_inc
* on Linux:
* zfs_vdev_mirror_rotating_inc
*
* ZFS_MODULE_PARAM(zfs, , dmu_prefetch_max, UINT, ZMOD_RW,
* "Limit one prefetch call to this size");
* on FreeBSD:
* vfs.zfs.dmu_prefetch_max
* on Linux:
* dmu_prefetch_max
*/
#define ZFS_MODULE_PARAM(scope_prefix, name_prefix, name, type, perm, desc) \
_Static_assert( \
sizeof (scope_prefix) == sizeof (enum scope_prefix_types), \
"" #scope_prefix " size mismatch with enum scope_prefix_types"); \
module_param_cb(name_prefix ## name, &spl_param_ops_ ## type, \
&name_prefix ## name, perm); \
MODULE_PARM_DESC(name_prefix ## name, desc)
/*
* Declare a module parameter / sysctl node
*
* "scope_prefix" the part of the the sysctl / sysfs tree the node resides under
* (currently a no-op on Linux)
* "name_prefix" the part of the variable name that will be excluded from the
* exported names on platforms with a hierarchical namespace
* "name" the part of the variable that will be exposed on platforms with a
* hierarchical namespace, or as name_prefix ## name on Linux
* "setfunc" setter function
* "getfunc" getter function
* "perm" the permissions (read/write or read only)
* "desc" a brief description of the option
*
* Examples:
* ZFS_MODULE_PARAM_CALL(zfs_spa, spa_, slop_shift, param_set_slop_shift,
* param_get_int, ZMOD_RW, "Reserved free space in pool");
* on FreeBSD:
* vfs.zfs.spa_slop_shift
* on Linux:
* spa_slop_shift
*/
#define ZFS_MODULE_PARAM_CALL( \
scope_prefix, name_prefix, name, setfunc, getfunc, perm, desc) \
_Static_assert( \
sizeof (scope_prefix) == sizeof (enum scope_prefix_types), \
"" #scope_prefix " size mismatch with enum scope_prefix_types"); \
module_param_call(name_prefix ## name, setfunc, getfunc, \
&name_prefix ## name, perm); \
MODULE_PARM_DESC(name_prefix ## name, desc)
/*
* As above, but there is no variable with the name name_prefix ## name,
* so NULL is passed to module_param_call instead.
*/
#define ZFS_MODULE_VIRTUAL_PARAM_CALL( \
scope_prefix, name_prefix, name, setfunc, getfunc, perm, desc) \
_Static_assert( \
sizeof (scope_prefix) == sizeof (enum scope_prefix_types), \
"" #scope_prefix " size mismatch with enum scope_prefix_types"); \
module_param_call(name_prefix ## name, setfunc, getfunc, NULL, perm); \
MODULE_PARM_DESC(name_prefix ## name, desc)
#define ZFS_MODULE_PARAM_ARGS const char *buf, zfs_kernel_param_t *kp
#endif /* _MOD_COMPAT_H */
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