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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
55 lines
1.6 KiB
C
55 lines
1.6 KiB
C
/*
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* Copyright (C) 2003-2004 Sistina Software, Inc. All rights reserved.
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* Copyright (C) 2004 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "lib.h"
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#include "toolcontext.h"
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#include "segtype.h"
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struct segment_type *get_segtype_from_string(struct cmd_context *cmd,
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const char *str)
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{
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struct segment_type *segtype;
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/* FIXME Register this properly within striped.c */
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if (!strcmp(str, SEG_TYPE_NAME_LINEAR))
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str = SEG_TYPE_NAME_STRIPED;
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dm_list_iterate_items(segtype, &cmd->segtypes)
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if (!strcmp(segtype->name, str))
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return segtype;
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if (!(segtype = init_unknown_segtype(cmd, str)))
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return_NULL;
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dm_list_add(&cmd->segtypes, &segtype->list);
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log_warn("WARNING: Unrecognised segment type %s", str);
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return segtype;
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}
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struct segment_type *get_segtype_from_flag(struct cmd_context *cmd, uint64_t flag)
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{
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struct segment_type *segtype;
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/* Iterate backwards to provide aliases; e.g. raid5 instead of raid5_ls */
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dm_list_iterate_back_items(segtype, &cmd->segtypes)
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if (flag & segtype->flags)
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return segtype;
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log_error(INTERNAL_ERROR "Unrecognised segment type flag 0x%016" PRIx64, flag);
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return NULL;
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}
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