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4b6e3b5e5e
Introduce a new parameter called "approx_alloc" that is set when the desired size of a new LV is specified in percentage terms. If set, the allocation code tries to get as much space as it can but does not fail if can at least get some. One of the practical implications is that users can now specify 100%FREE when creating RAID LVs, like this: ~> lvcreate --type raid5 -i 2 -l 100%FREE -n lv vg
89 lines
3.4 KiB
C
89 lines
3.4 KiB
C
/*
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* Copyright (C) 2003-2004 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 LVM2.
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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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef _LVM_LV_ALLOC_H
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#define _LVM_LV_ALLOC_H
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#include "metadata-exported.h"
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struct lv_segment *alloc_lv_segment(const struct segment_type *segtype,
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struct logical_volume *lv,
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uint32_t le, uint32_t len,
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uint64_t status,
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uint32_t stripe_size,
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struct logical_volume *log_lv,
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struct logical_volume *thin_pool_lv,
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uint32_t area_count,
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uint32_t area_len,
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uint32_t chunk_size,
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uint32_t region_size,
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uint32_t extents_copied,
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struct lv_segment *pvmove_source_seg);
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struct lv_segment *alloc_snapshot_seg(struct logical_volume *lv,
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uint64_t status, uint32_t old_le_count);
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int set_lv_segment_area_pv(struct lv_segment *seg, uint32_t area_num,
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struct physical_volume *pv, uint32_t pe);
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int set_lv_segment_area_lv(struct lv_segment *seg, uint32_t area_num,
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struct logical_volume *lv, uint32_t le,
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uint64_t status);
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int move_lv_segment_area(struct lv_segment *seg_to, uint32_t area_to,
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struct lv_segment *seg_from, uint32_t area_from);
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int release_lv_segment_area(struct lv_segment *seg, uint32_t s,
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uint32_t area_reduction);
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int release_and_discard_lv_segment_area(struct lv_segment *seg, uint32_t s, uint32_t area_reduction);
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struct alloc_handle;
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struct alloc_handle *allocate_extents(struct volume_group *vg,
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struct logical_volume *lv,
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const struct segment_type *segtype,
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uint32_t stripes,
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uint32_t mirrors, uint32_t log_count,
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uint32_t log_region_size, uint32_t extents,
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struct dm_list *allocatable_pvs,
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alloc_policy_t alloc, int approx_alloc,
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struct dm_list *parallel_areas);
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int lv_add_segment(struct alloc_handle *ah,
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uint32_t first_area, uint32_t num_areas,
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struct logical_volume *lv,
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const struct segment_type *segtype,
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uint32_t stripe_size,
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uint64_t status,
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uint32_t region_size);
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int lv_add_mirror_areas(struct alloc_handle *ah,
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struct logical_volume *lv, uint32_t le,
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uint32_t region_size);
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int lv_add_mirror_lvs(struct logical_volume *lv,
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struct logical_volume **sub_lvs,
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uint32_t num_extra_areas,
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uint64_t status, uint32_t region_size);
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int lv_add_log_segment(struct alloc_handle *ah, uint32_t first_area,
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struct logical_volume *log_lv, uint64_t status);
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int lv_add_virtual_segment(struct logical_volume *lv, uint64_t status,
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uint32_t extents,
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const struct segment_type *segtype,
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const char *thin_pool_name);
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void alloc_destroy(struct alloc_handle *ah);
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struct dm_list *build_parallel_areas_from_lv(struct logical_volume *lv,
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unsigned use_pvmove_parent_lv);
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#endif
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