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5899ea5a77
== Motivation and Context The new vdev ashift optimization prevents the removal of devices when a zfs configuration is comprised of disks which have different logical and physical block sizes. This is caused because we set 'spa_min_ashift' in vdev_open and then later call 'vdev_ashift_optimize'. This would result in an inconsistency between spa's ashift calculations and that of the top-level vdev. In addition, the optimization logical ignores the overridden ashift value that would be provided by '-o ashift=<val>'. == Description This change reworks the vdev ashift optimization so that it's only set the first time the device is configured. It still allows the physical and logical ahsift values to be set every time the device is opened but those values are only consulted on first open. Reviewed-by: Matthew Ahrens <mahrens@delphix.com> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Reviewed-by: Cedric Berger <cedric@precidata.com> Signed-off-by: George Wilson <gwilson@delphix.com> External-Issue: DLPX-71831 Closes #10932
154 lines
4.5 KiB
C
154 lines
4.5 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) 2016 Gvozden Neskovic <neskovic@gmail.com>.
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* Copyright (c) 2020 by Delphix. All rights reserved.
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*/
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#ifndef _MOD_COMPAT_H
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#define _MOD_COMPAT_H
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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/* Grsecurity kernel API change */
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#ifdef MODULE_PARAM_CALL_CONST
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typedef const struct kernel_param zfs_kernel_param_t;
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#else
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typedef struct kernel_param zfs_kernel_param_t;
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#endif
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#define ZMOD_RW 0644
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#define ZMOD_RD 0444
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/* BEGIN CSTYLED */
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#define INT int
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#define UINT uint
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#define ULONG ulong
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#define LONG long
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#define STRING charp
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/* END CSTYLED */
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enum scope_prefix_types {
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zfs,
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zfs_arc,
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zfs_condense,
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zfs_dbuf,
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zfs_dbuf_cache,
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zfs_deadman,
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zfs_dedup,
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zfs_l2arc,
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zfs_livelist,
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zfs_livelist_condense,
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zfs_lua,
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zfs_metaslab,
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zfs_mg,
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zfs_multihost,
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zfs_prefetch,
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zfs_reconstruct,
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zfs_recv,
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zfs_send,
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zfs_spa,
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zfs_trim,
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zfs_txg,
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zfs_vdev,
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zfs_vdev_cache,
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zfs_vdev_file,
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zfs_vdev_mirror,
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zfs_zevent,
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zfs_zio,
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zfs_zil
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};
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/*
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* Declare a module parameter / sysctl node
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*
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* "scope_prefix" the part of the the sysctl / sysfs tree the node resides under
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* (currently a no-op on Linux)
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* "name_prefix" the part of the variable name that will be excluded from the
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* exported names on platforms with a hierarchical namespace
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* "name" the part of the variable that will be exposed on platforms with a
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* hierarchical namespace, or as name_prefix ## name on Linux
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* "type" the variable type
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* "perm" the permissions (read/write or read only)
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* "desc" a brief description of the option
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*
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* Examples:
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* ZFS_MODULE_PARAM(zfs_vdev_mirror, zfs_vdev_mirror_, rotating_inc, UINT,
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* ZMOD_RW, "Rotating media load increment for non-seeking I/O's");
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* on FreeBSD:
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* vfs.zfs.vdev.mirror.rotating_inc
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* on Linux:
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* zfs_vdev_mirror_rotating_inc
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*
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* ZFS_MODULE_PARAM(zfs, , dmu_prefetch_max, UINT, ZMOD_RW,
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* "Limit one prefetch call to this size");
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* on FreeBSD:
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* vfs.zfs.dmu_prefetch_max
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* on Linux:
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* dmu_prefetch_max
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*/
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/* BEGIN CSTYLED */
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#define ZFS_MODULE_PARAM(scope_prefix, name_prefix, name, type, perm, desc) \
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CTASSERT_GLOBAL((sizeof (scope_prefix) == sizeof (enum scope_prefix_types))); \
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module_param(name_prefix ## name, type, perm); \
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MODULE_PARM_DESC(name_prefix ## name, desc)
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/* END CSTYLED */
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/*
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* Declare a module parameter / sysctl node
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*
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* "scope_prefix" the part of the the sysctl / sysfs tree the node resides under
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* (currently a no-op on Linux)
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* "name_prefix" the part of the variable name that will be excluded from the
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* exported names on platforms with a hierarchical namespace
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* "name" the part of the variable that will be exposed on platforms with a
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* hierarchical namespace, or as name_prefix ## name on Linux
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* "setfunc" setter function
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* "getfunc" getter function
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* "perm" the permissions (read/write or read only)
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* "desc" a brief description of the option
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*
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* Examples:
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* ZFS_MODULE_PARAM_CALL(zfs_spa, spa_, slop_shift, param_set_slop_shift,
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* param_get_int, ZMOD_RW, "Reserved free space in pool");
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* on FreeBSD:
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* vfs.zfs.spa_slop_shift
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* on Linux:
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* spa_slop_shift
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*/
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/* BEGIN CSTYLED */
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#define ZFS_MODULE_PARAM_CALL(scope_prefix, name_prefix, name, setfunc, getfunc, perm, desc) \
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CTASSERT_GLOBAL((sizeof (scope_prefix) == sizeof (enum scope_prefix_types))); \
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module_param_call(name_prefix ## name, setfunc, getfunc, &name_prefix ## name, perm); \
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MODULE_PARM_DESC(name_prefix ## name, desc)
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/* END CSTYLED */
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#define ZFS_MODULE_PARAM_ARGS const char *buf, zfs_kernel_param_t *kp
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#define ZFS_MODULE_DESCRIPTION(s) MODULE_DESCRIPTION(s)
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#define ZFS_MODULE_AUTHOR(s) MODULE_AUTHOR(s)
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#define ZFS_MODULE_LICENSE(s) MODULE_LICENSE(s)
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#define ZFS_MODULE_VERSION(s) MODULE_VERSION(s)
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#endif /* _MOD_COMPAT_H */
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