tests/qemu-iotests/126

   1 #!/usr/bin/env bash
   2 # group: rw auto backing
   3 #
   4 # Tests handling of colons in filenames (which may be confused with protocol
   5 # prefixes)
   6 #
   7 # Copyright (C) 2017 Red Hat, Inc.
   8 #
   9 # This program is free software; you can redistribute it and/or modify
  10 # it under the terms of the GNU General Public License as published by
  11 # the Free Software Foundation; either version 2 of the License, or
  12 # (at your option) any later version.
  13 #
  14 # This program is distributed in the hope that it will be useful,
  15 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 # GNU General Public License for more details.
  18 #
  19 # You should have received a copy of the GNU General Public License
  20 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  21 #
  22
  23 # creator
  24 owner=hreitz@redhat.com
  25
  26 seq="$(basename $0)"
  27 echo "QA output created by $seq"
  28
  29 status=1        # failure is the default!
  30
  31 # get standard environment, filters and checks
  32 . ./common.rc
  33 . ./common.filter
  34
  35 # Needs backing file support
  36 _supported_fmt qcow qcow2 qed vmdk
  37 _unsupported_imgopts "subformat=monolithicFlat" \
  38                      "subformat=twoGbMaxExtentFlat"
  39 # This is the default protocol (and we want to test the difference between
  40 # colons which separate a protocol prefix from the rest and colons which are
  41 # just part of the filename, so we cannot test protocols which require a prefix)
  42 _supported_proto file
  43
  44 echo
  45 echo '=== Testing plain files ==='
  46 echo
  47
  48 # A colon after a slash is not a protocol prefix separator
  49 TEST_IMG="$TEST_DIR/a:b.$IMGFMT" _make_test_img 64M
  50 _rm_test_img "$TEST_DIR/a:b.$IMGFMT"
  51
  52 # But if you want to be really sure, you can do this
  53 TEST_IMG="file:$TEST_DIR/a:b.$IMGFMT" _make_test_img 64M
  54 _rm_test_img "$TEST_DIR/a:b.$IMGFMT"
  55
  56
  57 echo
  58 echo '=== Testing relative backing filename resolution ==='
  59 echo
  60
  61 BASE_IMG="$TEST_DIR/image:base.$IMGFMT"
  62 TOP_IMG="$TEST_DIR/image:top.$IMGFMT"
  63
  64 TEST_IMG=$BASE_IMG _make_test_img 64M
  65 TEST_IMG=$TOP_IMG _make_test_img -b ./image:base.$IMGFMT -F $IMGFMT
  66
  67 # (1) The default cluster size depends on the image format
  68 # (2) vmdk only supports vmdk backing files, so it always reports the
  69 #     format of its backing file as such (but neither it nor qcow
  70 #     support the backing_fmt creation option, so we cannot use that to
  71 #     harmonize the output across all image formats this test supports)
  72 TEST_IMG=$TOP_IMG _img_info | grep -ve 'cluster_size' -e 'backing file format'
  73
  74 _rm_test_img "$BASE_IMG"
  75 _rm_test_img "$TOP_IMG"
  76
  77
  78 # Do another test where we access both top and base without any slash in them
  79 echo
  80 pushd "$TEST_DIR" >/dev/null
  81
  82 BASE_IMG="base.$IMGFMT"
  83 TOP_IMG="file:image:top.$IMGFMT"
  84
  85 TEST_IMG=$BASE_IMG _make_test_img 64M
  86 TEST_IMG=$TOP_IMG _make_test_img -b "$BASE_IMG" -F $IMGFMT
  87
  88 TEST_IMG=$TOP_IMG _img_info | grep -ve 'cluster_size' -e 'backing file format'
  89
  90 _rm_test_img "$BASE_IMG"
  91 _rm_test_img "image:top.$IMGFMT"
  92
  93 popd >/dev/null
  94
  95 # Note that we could also do the same test with BASE_IMG=file:image:base.$IMGFMT
  96 # -- but behavior for that case is a bit strange. Protocol-prefixed paths are
  97 # in a sense always absolute paths, so such paths will never be combined with
  98 # the path of the overlay. But since "image:base.$IMGFMT" is actually a
  99 # relative path, it will always be evaluated relative to qemu's CWD (but not
 100 # relative to the overlay!). While this is more or less intended, it is still
 101 # pretty strange and thus not something that is tested here.
 102 # (The root of the issue is the use of a relative path with a protocol prefix.
 103 #  This may always give you weird results because in one sense, qemu considers
 104 #  such paths absolute, whereas in another, they are still relative.)
 105
 106
 107 # success, all done
 108 echo '*** done'
 109 rm -f $seq.full
 110 status=0