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baba3f8e2a
Add: - conversion support from striped/raid0/raid0_meta to/from raid10; raid10 goes by the near format (same as used in creation of raid10 LVs), which groups data copies together with their original blocks (e.g. 3-way striped, 2 data copies resulting in 112233 in the first stripe followed by 445566 in the second etc.) and is limited to even numbers of legs for now - related tests to lvconvert-raid-takeover.sh - typo Related: rhbz1366296
121 lines
5.9 KiB
C
121 lines
5.9 KiB
C
/*
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* Copyright (C) 2016 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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#define N _takeover_noop
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#define X _takeover_unsupported
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#define lin_r0 _takeover_from_linear_to_raid0
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#define lin_r0 _takeover_from_linear_to_raid0
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#define lin_r1 _takeover_from_linear_to_raid1
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#define lin_r10 _takeover_from_linear_to_raid10
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#define lin_r45 _takeover_from_linear_to_raid45
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#define mir_r0 _takeover_from_mirrored_to_raid0
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#define mir_r0m _takeover_from_mirrored_to_raid0_meta
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#define mir_r1 _takeover_from_mirrored_to_raid1
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#define mir_r10 _takeover_from_mirrored_to_raid10
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#define mir_r45 _takeover_from_mirrored_to_raid45
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#define r01_r01 _takeover_from_raid01_to_raid01
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#define r01_r10 _takeover_from_raid01_to_raid10
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#define r01_str _takeover_from_raid01_to_striped
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#define r0__lin _takeover_from_raid0_to_linear
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#define r0__mir _takeover_from_raid0_to_mirrored
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#define r0m_lin _takeover_from_raid0_meta_to_linear
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#define r0m_mir _takeover_from_raid0_meta_to_mirrored
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#define r0m_r0 _takeover_from_raid0_meta_to_raid0
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#define r0m_r1 _takeover_from_raid0_meta_to_raid1
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#define r0m_r10 _takeover_from_raid0_meta_to_raid10
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#define r0m_r45 _takeover_from_raid0_meta_to_raid45
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#define r0m_r6 _takeover_from_raid0_meta_to_raid6
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#define r0m_str _takeover_from_raid0_meta_to_striped
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#define r0__r0m _takeover_from_raid0_to_raid0_meta
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#define r0__r1 _takeover_from_raid0_to_raid1
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#define r0__r10 _takeover_from_raid0_to_raid10
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#define r0__r45 _takeover_from_raid0_to_raid45
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#define r0__r6 _takeover_from_raid0_to_raid6
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#define r0__str _takeover_from_raid0_to_striped
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#define r10_lin _takeover_from_raid10_to_linear
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#define r10_mir _takeover_from_raid10_to_mirrored
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#define r10_r0 _takeover_from_raid10_to_raid0
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#define r10_r01 _takeover_from_raid10_to_raid01
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#define r10_r0m _takeover_from_raid10_to_raid0_meta
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#define r10_r1 _takeover_from_raid10_to_raid1
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#define r10_r10 _takeover_from_raid10_to_raid10
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#define r10_str _takeover_from_raid10_to_striped
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#define r1__lin _takeover_from_raid1_to_linear
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#define r1__mir _takeover_from_raid1_to_mirrored
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#define r1__r0 _takeover_from_raid1_to_raid0
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#define r1__r0m _takeover_from_raid1_to_raid0_meta
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#define r1__r1 _takeover_from_raid1_to_raid1
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#define r1__r10 _takeover_from_raid1_to_raid10
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#define r1__r45 _takeover_from_raid1_to_raid45
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#define r1__str _takeover_from_raid1_to_striped
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#define r45_lin _takeover_from_raid45_to_linear
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#define r45_mir _takeover_from_raid45_to_mirrored
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#define r45_r0 _takeover_from_raid45_to_raid0
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#define r45_r0m _takeover_from_raid45_to_raid0_meta
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#define r45_r1 _takeover_from_raid45_to_raid1
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#define r45_r54 _takeover_from_raid45_to_raid54
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#define r45_r6 _takeover_from_raid45_to_raid6
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#define r45_str _takeover_from_raid45_to_striped
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#define r6__r0 _takeover_from_raid6_to_raid0
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#define r6__r0m _takeover_from_raid6_to_raid0_meta
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#define r6__r45 _takeover_from_raid6_to_raid45
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#define r6__str _takeover_from_raid6_to_striped
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#define str_r0 _takeover_from_striped_to_raid0
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#define str_r01 _takeover_from_striped_to_raid01
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#define str_r0m _takeover_from_striped_to_raid0_meta
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#define str_r10 _takeover_from_striped_to_raid10
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#define str_r45 _takeover_from_striped_to_raid45
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#define str_r6 _takeover_from_striped_to_raid6
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static uint64_t _segtype_index[] = {
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1, /* linear */
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1, /* striped */
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SEG_MIRROR,
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SEG_RAID0,
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SEG_RAID0_META,
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SEG_RAID1,
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SEG_RAID4 | SEG_RAID5_LS | SEG_RAID5_LA | SEG_RAID5_LS | SEG_RAID5_RS | SEG_RAID5_RA | SEG_RAID5_N,
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SEG_RAID6_LS_6 | SEG_RAID6_LA_6 | SEG_RAID6_RS_6 | SEG_RAID6_RA_6 | SEG_RAID6_NC | SEG_RAID6_NR | SEG_RAID6_ZR | SEG_RAID6_N_6,
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0, // SEG_RAID10_NEAR | SEG_RAID10_FAR | SEG_RAID10_OFFSET,
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0, // SEG_RAID01,
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0
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};
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/*
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* Matrix of takeover functions.
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* Row corresponds to original segment type.
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* Column corresponds to new segment type.
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* N represents a combination that has no effect (no-op).
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* X represents a combination that is unsupported.
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*/
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static takeover_fn_t _takeover_fns[][11] = {
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/* from, to -> linear striped mirror raid0 raid0_meta raid1 raid4/5 raid6 raid10 raid01 other*/
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/* | */
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/* v */
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/* linear */ { N , X , X , lin_r0, lin_r0 , lin_r1, lin_r45, X , lin_r10, X , X },
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/* striped */ { X , N , X , str_r0, str_r0m, lin_r1, str_r45, str_r6, str_r10, str_r01, X },
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/* mirror */ { X , X , N , mir_r0, mir_r0m, mir_r1, mir_r45, X , mir_r10, X , X },
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/* raid0 */ { r0__lin, r0__str, r0__mir, N , r0__r0m, r0__r1, r0__r45, r0__r6, r0__r10, X , X },
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/* raid0_meta */ { r0m_lin, r0m_str, r0m_mir, r0m_r0, N , r0m_r1, r0m_r45, r0m_r6, r0m_r10, X , X },
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/* raid1 */ { r1__lin, r1__str, r1__mir, r1__r0, r1__r0m, r1__r1, r1__r45, X , r1__r10, X , X },
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/* raid4/5 */ { r45_lin, r45_str, r45_mir, r45_r0, r45_r0m, r45_r1, r45_r54, r45_r6, X , X , X },
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/* raid6 */ { X , r6__str, X , r6__r0, r6__r0m, X , r6__r45, X , X , X , X },
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/* raid10 */ { r10_lin, r10_str, r10_mir, r10_r0, r10_r0m, r10_r1, X , X , X , X , X },
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/* raid01 */ // { X , r01_str, X , X , X , X , X , X , r01_r10, r01_r01, X },
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/* other */ { X , X , X , X , X , X , X , X , X , X , X },
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};
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#undef X
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#undef N
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