tests/qemu-iotests/026

   1 #!/usr/bin/env bash
   2 # group: rw blkdbg
   3 #
   4 # qcow2 error path testing
   5 #
   6 # Copyright (C) 2010 Red Hat, Inc.
   7 #
   8 # This program is free software; you can redistribute it and/or modify
   9 # it under the terms of the GNU General Public License as published by
  10 # the Free Software Foundation; either version 2 of the License, or
  11 # (at your option) any later version.
  12 #
  13 # This program is distributed in the hope that it will be useful,
  14 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 # GNU General Public License for more details.
  17 #
  18 # You should have received a copy of the GNU General Public License
  19 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 #
  21
  22 # creator
  23 owner=kwolf@redhat.com
  24
  25 seq=`basename $0`
  26 echo "QA output created by $seq"
  27
  28 status=1        # failure is the default!
  29
  30 _cleanup()
  31 {
  32         _cleanup_test_img
  33     rm "$TEST_DIR/blkdebug.conf"
  34     rm -f "$TEST_IMG.data_file"
  35 }
  36 trap "_cleanup; exit \$status" 0 1 2 3 15
  37
  38 # get standard environment, filters and checks
  39 . ./common.rc
  40 . ./common.filter
  41 . ./common.pattern
  42
  43 # Currently only qcow2 supports rebasing
  44 _supported_fmt qcow2
  45 _supported_proto file fuse
  46 _default_cache_mode writethrough
  47 _supported_cache_modes writethrough none
  48 # The refcount table tests expect a certain minimum width for refcount entries
  49 # (so that the refcount table actually needs to grow); that minimum is 16 bits,
  50 # being the default refcount entry width.
  51 # 32 and 64 bits do not work either, however, due to different leaked cluster
  52 # count on error.
  53 # Thus, the only remaining option is refcount_bits=16.
  54 #
  55 # As for data_file, none of the refcount tests can work for it.
  56 _unsupported_imgopts 'refcount_bits=\([^1]\|.\([^6]\|$\)\)' \
  57     data_file
  58
  59 echo "Errors while writing 128 kB"
  60 echo
  61
  62 CLUSTER_SIZE=1024
  63
  64 BLKDBG_TEST_IMG="blkdebug:$TEST_DIR/blkdebug.conf:$TEST_IMG"
  65
  66 for event in \
  67     l1_update \
  68     \
  69     l2_load \
  70     l2_update \
  71     l2_alloc_write \
  72     \
  73     write_aio \
  74     \
  75     refblock_load \
  76     refblock_update_part \
  77     refblock_alloc \
  78     \
  79     cluster_alloc \
  80
  81 do
  82
  83 for errno in 5 28; do
  84 for imm in off; do
  85 for once in on off; do
  86 for vmstate in "" "-b"; do
  87
  88 cat > "$TEST_DIR/blkdebug.conf" <<EOF
  89 [inject-error]
  90 event = "$event"
  91 errno = "$errno"
  92 immediately = "$imm"
  93 once ="$once"
  94 EOF
  95
  96 _make_test_img 1G
  97
  98 echo
  99 echo "Event: $event; errno: $errno; imm: $imm; once: $once; write $vmstate"
 100
 101 # We want to catch a simple L2 update, not the allocation of the first L2 table
 102 if [ "$event" == "l2_update" ]; then
 103     $QEMU_IO -c "write $vmstate 0 512" "$TEST_IMG" > /dev/null 2>&1
 104 fi
 105
 106 $QEMU_IO -c "write $vmstate 0 128k " "$BLKDBG_TEST_IMG" | _filter_qemu_io
 107
 108 # l2_load is not called on allocation, so issue a second write
 109 # Reads are another path to trigger l2_load, so do a read, too
 110 if [ "$event" == "l2_load" ]; then
 111     $QEMU_IO -c "write $vmstate 0 128k " "$BLKDBG_TEST_IMG" | _filter_qemu_io
 112     $QEMU_IO -c "read $vmstate 0 128k " "$BLKDBG_TEST_IMG" | _filter_qemu_io
 113 fi
 114
 115 _check_test_img_ignore_leaks 2>&1 | grep -v "refcount=1 reference=0"
 116
 117 done
 118 done
 119 done
 120 done
 121 done
 122
 123
 124 echo
 125 echo === Refcount table growth tests ===
 126 echo
 127 CLUSTER_SIZE=512
 128
 129
 130 for event in \
 131     refblock_alloc_hookup \
 132     refblock_alloc_write \
 133     refblock_alloc_write_blocks \
 134     refblock_alloc_write_table \
 135     refblock_alloc_switch_table \
 136
 137 do
 138
 139 # This one takes a while, so let's test only one error code (ENOSPC should
 140 # never be generated by qemu, so it's probably a good choice)
 141 for errno in 28; do
 142 for imm in off; do
 143 for once in on off; do
 144 for vmstate in "" "-b"; do
 145
 146 cat > "$TEST_DIR/blkdebug.conf" <<EOF
 147 [inject-error]
 148 event = "$event"
 149 errno = "$errno"
 150 immediately = "$imm"
 151 once = "$once"
 152 EOF
 153
 154 _make_test_img 1G
 155
 156 echo
 157 echo "Event: $event; errno: $errno; imm: $imm; once: $once; write $vmstate"
 158 $QEMU_IO -c "write $vmstate 0 64M" "$BLKDBG_TEST_IMG" | _filter_qemu_io
 159
 160 _check_test_img_ignore_leaks 2>&1 | grep -v "refcount=1 reference=0"
 161
 162 done
 163 done
 164 done
 165 done
 166 done
 167
 168 echo
 169 echo === L1 growth tests ===
 170 echo
 171 CLUSTER_SIZE=1024
 172
 173
 174 for event in \
 175     l1_grow_alloc_table \
 176     l1_grow_write_table \
 177     l1_grow_activate_table \
 178
 179 do
 180
 181 for errno in 5 28; do
 182 for imm in off; do
 183 for once in on off; do
 184
 185 cat > "$TEST_DIR/blkdebug.conf" <<EOF
 186 [inject-error]
 187 event = "$event"
 188 errno = "$errno"
 189 immediately = "$imm"
 190 once = "$once"
 191 EOF
 192
 193 _make_test_img 1G
 194
 195 echo
 196 echo "Event: $event; errno: $errno; imm: $imm; once: $once"
 197 $QEMU_IO -c "write -b 0 64k" "$BLKDBG_TEST_IMG" | _filter_qemu_io
 198
 199 _check_test_img_ignore_leaks 2>&1 | grep -v "refcount=1 reference=0"
 200
 201 done
 202 done
 203 done
 204 done
 205
 206 echo
 207 echo === Avoid cluster leaks after temporary failure ===
 208 echo
 209
 210 cat > "$TEST_DIR/blkdebug.conf" <<EOF
 211 [inject-error]
 212 event = "write_aio"
 213 errno = "5"
 214 once = "on"
 215 EOF
 216
 217 # After the failed first write, do a second write so that the updated refcount
 218 # block is actually written back
 219 _make_test_img 64M
 220 $QEMU_IO -c "write 0 1M" -c "write 0 1M" "$BLKDBG_TEST_IMG" | _filter_qemu_io
 221 _check_test_img
 222
 223 echo
 224 echo === Avoid freeing preallocated zero clusters on failure ===
 225 echo
 226
 227 cat > "$TEST_DIR/blkdebug.conf" <<EOF
 228 [inject-error]
 229 event = "write_aio"
 230 errno = "5"
 231 once = "on"
 232 EOF
 233
 234 _make_test_img $CLUSTER_SIZE
 235 # Create a preallocated zero cluster
 236 $QEMU_IO -c "write 0 $CLUSTER_SIZE" -c "write -z 0 $CLUSTER_SIZE" "$TEST_IMG" \
 237     | _filter_qemu_io
 238 # Try to overwrite it (prompting an I/O error from blkdebug), thus
 239 # triggering the alloc abort code
 240 $QEMU_IO -c "write 0 $CLUSTER_SIZE" "$BLKDBG_TEST_IMG" | _filter_qemu_io
 241
 242 _check_test_img
 243
 244 # success, all done
 245 echo "*** done"
 246 rm -f $seq.full
 247 status=0