mirror of
https://github.com/linux-apfs/apfstests.git
synced 2026-05-01 15:01:44 -07:00
Darrick J. Wong
ffad9122b6
Make sure that we can handle multiple bmbt records mapping to a single rmapbt record. This can happen if you fallocate more than 2^21 contiguous blocks to a file. (Also add some helpers that can create huge devices with some dm-zero and dm-snapshot fakery.) Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Eryu Guan <eguan@redhat.com>
61 lines
2.1 KiB
Plaintext
61 lines
2.1 KiB
Plaintext
##/bin/bash
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# Routines for creating huge (fake) disks
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#-----------------------------------------------------------------------
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# Copyright (c) 2016 Oracle. All Rights Reserved.
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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# USA
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#
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# Contact information: Oracle Corporation, 500 Oracle Parkway,
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# Redwood Shores, CA 94065, USA, or: http://www.oracle.com/
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#-----------------------------------------------------------------------
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_require_dmhugedisk()
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{
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_require_dm_target zero
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_require_dm_target snapshot
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}
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_dmhugedisk_init()
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{
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test -z "$1" && _fatal "must specify sector count to _dmhugedisk_init"
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local dm_backing_dev=$SCRATCH_DEV
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$DMSETUP_PROG remove huge-test > /dev/null 2>&1
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$DMSETUP_PROG remove huge-test-zero > /dev/null 2>&1
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local blk_dev_size=$1
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DMHUGEDISK_ZERO='/dev/mapper/huge-test-zero'
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DMHUGEDISK_DEV='/dev/mapper/huge-test'
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DMHUGEDISK_ZERO_TABLE="0 $blk_dev_size zero"
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DMHUGEDISK_DEV_TABLE="0 $blk_dev_size snapshot $DMHUGEDISK_ZERO $SCRATCH_DEV N 512"
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$DMSETUP_PROG create huge-test-zero --table "$DMHUGEDISK_ZERO_TABLE" || \
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_fatal "failed to create dm huge zero device"
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$DMSETUP_PROG create huge-test --table "$DMHUGEDISK_DEV_TABLE" || \
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_fatal "failed to create dm huge device"
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}
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_dmhugedisk_cleanup()
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{
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$UMOUNT_PROG $SCRATCH_MNT > /dev/null 2>&1
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# wait for device to be fully settled so that 'dmsetup remove' doesn't
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# fail due to EBUSY
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$UDEV_SETTLE_PROG >/dev/null 2>&1
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$DMSETUP_PROG remove huge-test > /dev/null 2>&1
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$DMSETUP_PROG remove huge-test-zero > /dev/null 2>&1
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}
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