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tests: add error_dev aux
Aux function to replace PV with specifically damaged device. Usage: aux error_dev "$dev1" 8:32 96:8 Replaces from 8 sector 32 error 512b sectors and from 96 sector next 8 sectors will fail on rw. Rest of device is preserved. For testing: dd if="$dev1" of=x bs=512 count=104 conv=sync,noerror iflag=direct
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@ -371,6 +371,53 @@ enable_dev() {
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finish_udev_transaction
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}
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#
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# Convert device to device with errors
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# Takes the list of pairs of error segment from:len
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# Original device table is replace with multiple lines
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# i.e. error_dev "$dev1" 8:32 96:8
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error_dev() {
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local dev=$1
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local name=$(echo "$dev" | sed -e 's,.*/,,')
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local fromlen
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local pos
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local size
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local type
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local pvdev
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local offset
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read pos size type pvdev offset < $name.table
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shift
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rm -f $name.errtable
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for fromlen in "$@"; do
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from=${fromlen%%:*}
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len=${fromlen##*:}
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diff=$(($from - $pos))
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if test $diff -gt 0 ; then
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echo "$pos $diff $type $pvdev $(($pos + $offset))" >>$name.errtable
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pos=$(($pos + $diff))
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elif test $diff -lt 0 ; then
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die "Position error"
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fi
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echo "$from $len error" >>$name.errtable
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pos=$(($pos + $len))
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done
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diff=$(($size - $pos))
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test $diff -gt 0 && echo "$pos $diff $type $pvdev $(($pos + $offset))" >>$name.errtable
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init_udev_transaction
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if dmsetup table $name ; then
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dmsetup load "$name" "$name.errtable"
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else
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dmsetup create -u "TEST-$name" "$name" "$name.errtable"
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fi
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# using device name (since device path does not exists yet with udev)
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notify_lvmetad "$dev"
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dmsetup resume "$name"
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finish_udev_transaction
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}
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backup_dev() {
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local dev
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