tests/qemu-iotests/126

   1 #!/usr/bin/env bash
   2 #
   3 # Tests handling of colons in filenames (which may be confused with protocol
   4 # prefixes)
   5 #
   6 # Copyright (C) 2017 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=mreitz@redhat.com
  24
  25 seq="$(basename $0)"
  26 echo "QA output created by $seq"
  27
  28 status=1        # failure is the default!
  29
  30 # get standard environment, filters and checks
  31 . ./common.rc
  32 . ./common.filter
  33
  34 # Needs backing file support
  35 _supported_fmt qcow qcow2 qed vmdk
  36 # This is the default protocol (and we want to test the difference between
  37 # colons which separate a protocol prefix from the rest and colons which are
  38 # just part of the filename, so we cannot test protocols which require a prefix)
  39 _supported_proto file
  40
  41 echo
  42 echo '=== Testing plain files ==='
  43 echo
  44
  45 # A colon after a slash is not a protocol prefix separator
  46 TEST_IMG="$TEST_DIR/a:b.$IMGFMT" _make_test_img 64M
  47 _rm_test_img "$TEST_DIR/a:b.$IMGFMT"
  48
  49 # But if you want to be really sure, you can do this
  50 TEST_IMG="file:$TEST_DIR/a:b.$IMGFMT" _make_test_img 64M
  51 _rm_test_img "$TEST_DIR/a:b.$IMGFMT"
  52
  53
  54 echo
  55 echo '=== Testing relative backing filename resolution ==='
  56 echo
  57
  58 BASE_IMG="$TEST_DIR/image:base.$IMGFMT"
  59 TOP_IMG="$TEST_DIR/image:top.$IMGFMT"
  60
  61 TEST_IMG=$BASE_IMG _make_test_img 64M
  62 TEST_IMG=$TOP_IMG _make_test_img -b ./image:base.$IMGFMT
  63
  64 # (1) The default cluster size depends on the image format
  65 # (2) vmdk only supports vmdk backing files, so it always reports the
  66 #     format of its backing file as such (but neither it nor qcow
  67 #     support the backing_fmt creation option, so we cannot use that to
  68 #     harmonize the output across all image formats this test supports)
  69 TEST_IMG=$TOP_IMG _img_info | grep -ve 'cluster_size' -e 'backing file format'
  70
  71 _rm_test_img "$BASE_IMG"
  72 _rm_test_img "$TOP_IMG"
  73
  74
  75 # Do another test where we access both top and base without any slash in them
  76 echo
  77 pushd "$TEST_DIR" >/dev/null
  78
  79 BASE_IMG="base.$IMGFMT"
  80 TOP_IMG="file:image:top.$IMGFMT"
  81
  82 TEST_IMG=$BASE_IMG _make_test_img 64M
  83 TEST_IMG=$TOP_IMG _make_test_img -b "$BASE_IMG"
  84
  85 TEST_IMG=$TOP_IMG _img_info | grep -ve 'cluster_size' -e 'backing file format'
  86
  87 _rm_test_img "$BASE_IMG"
  88 _rm_test_img "image:top.$IMGFMT"
  89
  90 popd >/dev/null
  91
  92 # Note that we could also do the same test with BASE_IMG=file:image:base.$IMGFMT
  93 # -- but behavior for that case is a bit strange. Protocol-prefixed paths are
  94 # in a sense always absolute paths, so such paths will never be combined with
  95 # the path of the overlay. But since "image:base.$IMGFMT" is actually a
  96 # relative path, it will always be evaluated relative to qemu's CWD (but not
  97 # relative to the overlay!). While this is more or less intended, it is still
  98 # pretty strange and thus not something that is tested here.
  99 # (The root of the issue is the use of a relative path with a protocol prefix.
 100 #  This may always give you weird results because in one sense, qemu considers
 101 #  such paths absolute, whereas in another, they are still relative.)
 102
 103
 104 # success, all done
 105 echo '*** done'
 106 rm -f $seq.full
 107 status=0