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e2354ea344
In order to support striped raid5/6/10 LV reshaping (change of LV type, stripesize or number of legs), this patch introduces infrastructure prerequisites to be used by raid_manip.c extensions in followup patches. This base is needed for allocation of out-of-place reshape space required by the MD raid personalities to avoid writing over data in-place when reading off the current RAID layout or number of legs and writing out the new layout or to a different number of legs (i.e. restripe) Changes: - add members reshape_len to 'struct lv_segment' to store out-of-place reshape length per component rimage - add member data_copies to struct lv_segment to support more than 2 raid10 data copies - make alloc_lv_segment() aware of both reshape_len and data_copies - adjust all alloc_lv_segment() callers to the new API - add functions to retrieve the current data offset (needed for out-of-place reshaping space allocation) and the devices count from the kernel - make libdm deptree code aware of reshape_len - add LV flags for disk add/remove reshaping - support import/export of the new 'struct lv_segment' members - enhance lv_extend/_lv_reduce to cope with reshape_len - add seg_is_*/segtype_is_* macros related to reshaping - add target version check for reshaping - grow rebuilds/writemostly bitmaps to 246 bit to support kernel maximal - enhance libdm deptree code to support data_offset (out-of-place reshaping) and delta_disk (legs add/remove reshaping) target arguments Related: rhbz834579 Related: rhbz1191935 Related: rhbz1191978
59 lines
2.2 KiB
C
59 lines
2.2 KiB
C
/*
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* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
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* Copyright (C) 2004-2012 Red Hat, Inc. All rights reserved.
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*
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* This file is part of the device-mapper userspace tools.
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*
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* This copyrighted material is made available to anyone wishing to use,
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* modify, copy, or redistribute it subject to the terms and conditions
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* of the GNU Lesser General Public License v.2.1.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef LIB_DMCOMMON_H
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#define LIB_DMCOMMON_H
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#include "libdevmapper.h"
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#define DM_DEFAULT_NAME_MANGLING_MODE_ENV_VAR_NAME "DM_DEFAULT_NAME_MANGLING_MODE"
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#define DEV_NAME(dmt) (dmt->mangled_dev_name ? : dmt->dev_name)
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#define DEV_UUID(DMT) (dmt->mangled_uuid ? : dmt->uuid)
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#define RAID_BITMAP_SIZE 4
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int mangle_string(const char *str, const char *str_name, size_t len,
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char *buf, size_t buf_len, dm_string_mangling_t mode);
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int unmangle_string(const char *str, const char *str_name, size_t len,
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char *buf, size_t buf_len, dm_string_mangling_t mode);
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int check_multiple_mangled_string_allowed(const char *str, const char *str_name,
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dm_string_mangling_t mode);
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struct target *create_target(uint64_t start,
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uint64_t len,
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const char *type, const char *params);
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int add_dev_node(const char *dev_name, uint32_t minor, uint32_t major,
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uid_t uid, gid_t gid, mode_t mode, int check_udev, unsigned rely_on_udev);
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int rm_dev_node(const char *dev_name, int check_udev, unsigned rely_on_udev);
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int rename_dev_node(const char *old_name, const char *new_name,
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int check_udev, unsigned rely_on_udev);
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int get_dev_node_read_ahead(const char *dev_name, uint32_t major, uint32_t minor,
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uint32_t *read_ahead);
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int set_dev_node_read_ahead(const char *dev_name, uint32_t major, uint32_t minor,
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uint32_t read_ahead, uint32_t read_ahead_flags);
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void update_devs(void);
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void selinux_release(void);
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void inc_suspended(void);
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void dec_suspended(void);
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int parse_thin_pool_status(const char *params, struct dm_status_thin_pool *s);
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#endif
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