1 files changed, 247 insertions, 0 deletions
diff --git a/tests/qemu-iotests/026 b/tests/qemu-iotests/026
new file mode 100755
index 000000000..d37e266da
--- /dev/null
+++ b/tests/qemu-iotests/026
@@ -0,0 +1,247 @@
+#!/usr/bin/env bash
+# group: rw blkdbg
+#
+# qcow2 error path testing
+#
+# Copyright (C) 2010 Red Hat, Inc.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+
+# creator
+owner=kwolf@redhat.com
+
+seq=`basename $0`
+echo "QA output created by $seq"
+
+status=1	# failure is the default!
+
+_cleanup()
+{
+	_cleanup_test_img
+    rm "$TEST_DIR/blkdebug.conf"
+    rm -f "$TEST_IMG.data_file"
+}
+trap "_cleanup; exit \$status" 0 1 2 3 15
+
+# get standard environment, filters and checks
+. ./common.rc
+. ./common.filter
+. ./common.pattern
+
+# Currently only qcow2 supports rebasing
+_supported_fmt qcow2
+_supported_proto file fuse
+_default_cache_mode writethrough
+_supported_cache_modes writethrough none
+# The refcount table tests expect a certain minimum width for refcount entries
+# (so that the refcount table actually needs to grow); that minimum is 16 bits,
+# being the default refcount entry width.
+# 32 and 64 bits do not work either, however, due to different leaked cluster
+# count on error.
+# Thus, the only remaining option is refcount_bits=16.
+#
+# As for data_file, none of the refcount tests can work for it.
+_unsupported_imgopts 'refcount_bits=\([^1]\|.\([^6]\|$\)\)' \
+    data_file
+
+echo "Errors while writing 128 kB"
+echo
+
+CLUSTER_SIZE=1024
+
+BLKDBG_TEST_IMG="blkdebug:$TEST_DIR/blkdebug.conf:$TEST_IMG"
+
+for event in \
+    l1_update \
+    \
+    l2_load \
+    l2_update \
+    l2_alloc_write \
+    \
+    write_aio \
+    \
+    refblock_load \
+    refblock_update_part \
+    refblock_alloc \
+    \
+    cluster_alloc \
+
+do
+
+for errno in 5 28; do
+for imm in off; do
+for once in on off; do
+for vmstate in "" "-b"; do
+
+cat > "$TEST_DIR/blkdebug.conf" <<EOF
+[inject-error]
+event = "$event"
+errno = "$errno"
+immediately = "$imm"
+once ="$once"
+EOF
+
+_make_test_img 1G
+
+echo
+echo "Event: $event; errno: $errno; imm: $imm; once: $once; write $vmstate"
+
+# We want to catch a simple L2 update, not the allocation of the first L2 table
+if [ "$event" == "l2_update" ]; then
+    $QEMU_IO -c "write $vmstate 0 512" "$TEST_IMG" > /dev/null 2>&1
+fi
+
+$QEMU_IO -c "write $vmstate 0 128k " "$BLKDBG_TEST_IMG" | _filter_qemu_io
+
+# l2_load is not called on allocation, so issue a second write
+# Reads are another path to trigger l2_load, so do a read, too
+if [ "$event" == "l2_load" ]; then
+    $QEMU_IO -c "write $vmstate 0 128k " "$BLKDBG_TEST_IMG" | _filter_qemu_io
+    $QEMU_IO -c "read $vmstate 0 128k " "$BLKDBG_TEST_IMG" | _filter_qemu_io
+fi
+
+_check_test_img_ignore_leaks 2>&1 | grep -v "refcount=1 reference=0"
+
+done
+done
+done
+done
+done
+
+
+echo
+echo === Refcount table growth tests ===
+echo
+CLUSTER_SIZE=512
+
+
+for event in \
+    refblock_alloc_hookup \
+    refblock_alloc_write \
+    refblock_alloc_write_blocks \
+    refblock_alloc_write_table \
+    refblock_alloc_switch_table \
+
+do
+
+# This one takes a while, so let's test only one error code (ENOSPC should
+# never be generated by qemu, so it's probably a good choice)
+for errno in 28; do
+for imm in off; do
+for once in on off; do
+for vmstate in "" "-b"; do
+
+cat > "$TEST_DIR/blkdebug.conf" <<EOF
+[inject-error]
+event = "$event"
+errno = "$errno"
+immediately = "$imm"
+once = "$once"
+EOF
+
+_make_test_img 1G
+
+echo
+echo "Event: $event; errno: $errno; imm: $imm; once: $once; write $vmstate"
+$QEMU_IO -c "write $vmstate 0 64M" "$BLKDBG_TEST_IMG" | _filter_qemu_io
+
+_check_test_img_ignore_leaks 2>&1 | grep -v "refcount=1 reference=0"
+
+done
+done
+done
+done
+done
+
+echo
+echo === L1 growth tests ===
+echo
+CLUSTER_SIZE=1024
+
+
+for event in \
+    l1_grow_alloc_table \
+    l1_grow_write_table \
+    l1_grow_activate_table \
+
+do
+
+for errno in 5 28; do
+for imm in off; do
+for once in on off; do
+
+cat > "$TEST_DIR/blkdebug.conf" <<EOF
+[inject-error]
+event = "$event"
+errno = "$errno"
+immediately = "$imm"
+once = "$once"
+EOF
+
+_make_test_img 1G
+
+echo
+echo "Event: $event; errno: $errno; imm: $imm; once: $once"
+$QEMU_IO -c "write -b 0 64k" "$BLKDBG_TEST_IMG" | _filter_qemu_io
+
+_check_test_img_ignore_leaks 2>&1 | grep -v "refcount=1 reference=0"
+
+done
+done
+done
+done
+
+echo
+echo === Avoid cluster leaks after temporary failure ===
+echo
+
+cat > "$TEST_DIR/blkdebug.conf" <<EOF
+[inject-error]
+event = "write_aio"
+errno = "5"
+once = "on"
+EOF
+
+# After the failed first write, do a second write so that the updated refcount
+# block is actually written back
+_make_test_img 64M
+$QEMU_IO -c "write 0 1M" -c "write 0 1M" "$BLKDBG_TEST_IMG" | _filter_qemu_io
+_check_test_img
+
+echo
+echo === Avoid freeing preallocated zero clusters on failure ===
+echo
+
+cat > "$TEST_DIR/blkdebug.conf" <<EOF
+[inject-error]
+event = "write_aio"
+errno = "5"
+once = "on"
+EOF
+
+_make_test_img $CLUSTER_SIZE
+# Create a preallocated zero cluster
+$QEMU_IO -c "write 0 $CLUSTER_SIZE" -c "write -z 0 $CLUSTER_SIZE" "$TEST_IMG" \
+    | _filter_qemu_io
+# Try to overwrite it (prompting an I/O error from blkdebug), thus
+# triggering the alloc abort code
+$QEMU_IO -c "write 0 $CLUSTER_SIZE" "$BLKDBG_TEST_IMG" | _filter_qemu_io
+
+_check_test_img
+
+# success, all done
+echo "*** done"
+rm -f $seq.full
+status=0