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90 lines
2.8 KiB
Bash
90 lines
2.8 KiB
Bash
#!/usr/bin/env bash
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# Copyright (C) 2017 Red Hat, Inc. All rights reserved.
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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 General Public License v.2.
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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 Foundation,
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# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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# Exercise cache flushing is abortable
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SKIP_WITH_LVMPOLLD=1
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. lib/inittest
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aux have_cache 1 3 0 || skip
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aux prepare_vg
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SIZE_MB=200
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# Use large zero device and later delayed metadata dev1
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lvcreate -L$((SIZE_MB * 2))M --type zero -n cpool $vg
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lvconvert -y --type cache-pool --chunksize 32k $vg/cpool "$dev1"
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lvcreate -L$((SIZE_MB * 2))M --type zero -n $lv1 $vg
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lvconvert -y -H --chunksize 32k --cachemode writeback --cachepool $vg/cpool $vg/$lv1
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#
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# Ensure cache gets promoted blocks
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#
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for i in $(seq 1 2) ; do
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dd if=/dev/zero of="$DM_DEV_DIR/$vg/$lv1" bs=1M count=$SIZE_MB oflag=direct || true
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dd if="$DM_DEV_DIR/$vg/$lv1" of=/dev/null bs=1M count=$SIZE_MB iflag=direct || true
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done
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aux delay_dev "$dev1" 0 200 "$(get first_extent_sector "$dev1"):"
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dd if=/dev/zero of="$DM_DEV_DIR/$vg/$lv1" bs=1M count=$SIZE_MB
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lvdisplay --maps $vg
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# Delay dev to ensure we have some time to 'capture' interrupt in flush
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# TODO, how to make writeback cache dirty
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test "$(get lv_field $vg/$lv1 cache_dirty_blocks)" -gt 0 || {
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lvdisplay --maps $vg
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skip "Cannot make a dirty writeback cache LV."
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}
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LVM_TEST_TAG="kill_me_$PREFIX" lvconvert -vvvv --splitcache $vg/$lv1 >logconvert 2>&1 &
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PID_CONVERT=$!
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for i in {1..50}; do
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out=$(dmsetup status --noflush "$vg-$lv1")
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case "$out" in
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*cleaner*) break;;
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esac
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echo "$i: Waiting for cleaner policy on $vg/$lv1"
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sleep .03
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done
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test "$i" -ge 49 && die "Waited for cleaner policy on $vg/$lv1 too long!"
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# While lvconvert updated table to 'cleaner' policy now it
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# should be running in 'Flushing' loop and just 1 KILL should
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# cause abortion of flushing
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kill -INT $PID_CONVERT
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aux enable_dev "$dev2"
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wait
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#cat logconvert || true
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# Problem of this test is, in older kernels, even the initial change to cleaner
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# policy table line causes long suspend which in practice is cleaning all the
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# dirty blocks - so the test can't really break the cache clearing.
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#
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# So the failure of test is reported only for recent kernels > 5.6
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# ans skipped otherwise - as those can't be fixed anyway
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grep -E "Flushing.*aborted" logconvert || {
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cat logconvert || true
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vgremove -f $vg
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aux kernel_at_least 5 6 || skip "Cache missed to abort flushing with older kernel"
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die "Flushing of $vg/$lv1 not aborted ?"
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}
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# check the table got restored
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check grep_dmsetup table $vg-$lv1 "writeback"
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lvdisplay --maps $vg
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vgremove -f $vg
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