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Annotation of qemu/tests/qemu-iotests/028, revision 1.1

1.1     ! root        1: #!/bin/bash
        !             2: #
        !             3: # Test that backing files can be smaller than the image
        !             4: #
        !             5: # Copyright (C) 2010 IBM, Corp.
        !             6: #
        !             7: # Based on 017:
        !             8: # Copyright (C) 2009 Red Hat, Inc.
        !             9: #
        !            10: # This program is free software; you can redistribute it and/or modify
        !            11: # it under the terms of the GNU General Public License as published by
        !            12: # the Free Software Foundation; either version 2 of the License, or
        !            13: # (at your option) any later version.
        !            14: #
        !            15: # This program is distributed in the hope that it will be useful,
        !            16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
        !            17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
        !            18: # GNU General Public License for more details.
        !            19: #
        !            20: # You should have received a copy of the GNU General Public License
        !            21: # along with this program.  If not, see <http://www.gnu.org/licenses/>.
        !            22: #
        !            23: 
        !            24: # creator
        !            25: [email protected]
        !            26: 
        !            27: seq=`basename $0`
        !            28: echo "QA output created by $seq"
        !            29: 
        !            30: here=`pwd`
        !            31: tmp=/tmp/$$
        !            32: status=1       # failure is the default!
        !            33: 
        !            34: _cleanup()
        !            35: {
        !            36:        _cleanup_test_img
        !            37: }
        !            38: trap "_cleanup; exit \$status" 0 1 2 3 15
        !            39: 
        !            40: # get standard environment, filters and checks
        !            41: . ./common.rc
        !            42: . ./common.filter
        !            43: . ./common.pattern
        !            44: 
        !            45: # Any format supporting backing files except vmdk and qcow which do not support
        !            46: # smaller backing files.
        !            47: _supported_fmt qcow2 qed
        !            48: _supported_proto generic
        !            49: _supported_os Linux
        !            50: 
        !            51: # Choose a size that is not necessarily a cluster size multiple for image
        !            52: # formats that use clusters.  This will ensure that the base image doesn't end
        !            53: # precisely on a cluster boundary (the easy case).
        !            54: image_size=$(( 4 * 1024 * 1024 * 1024 + 3 * 512 ))
        !            55: 
        !            56: # The base image is smaller than the image file
        !            57: base_size=$(( image_size - 1024 * 1024 * 1024 ))
        !            58: 
        !            59: offset=$(( base_size - 32 * 1024 ))
        !            60: 
        !            61: _make_test_img $base_size
        !            62: 
        !            63: echo "Filling base image"
        !            64: echo
        !            65: 
        !            66: # Fill end of base image with a pattern, skipping every other sector
        !            67: io writev $offset 512 1024 32
        !            68: 
        !            69: _check_test_img
        !            70: 
        !            71: echo "Creating test image with backing file"
        !            72: echo
        !            73: 
        !            74: mv $TEST_IMG $TEST_IMG.base
        !            75: _make_test_img -b $TEST_IMG.base $image_size
        !            76: 
        !            77: echo "Filling test image"
        !            78: echo
        !            79: 
        !            80: # Write every other sector around where the base image ends
        !            81: io writev $(( offset + 512 )) 512 1024 64
        !            82: 
        !            83: _check_test_img
        !            84: 
        !            85: echo "Reading"
        !            86: echo
        !            87: 
        !            88: # Base image sectors
        !            89: io readv $(( offset )) 512 1024 32
        !            90: 
        !            91: # Image sectors
        !            92: io readv $(( offset + 512 )) 512 1024 64
        !            93: 
        !            94: # Zero sectors beyond end of base image
        !            95: io_zero readv $(( offset + 32 * 1024 )) 512 1024 32
        !            96: 
        !            97: _check_test_img
        !            98: 
        !            99: # Rebase it on top of its base image
        !           100: $QEMU_IMG rebase -b $TEST_IMG.base $TEST_IMG
        !           101: 
        !           102: _check_test_img
        !           103: 
        !           104: # success, all done
        !           105: echo "*** done"
        !           106: rm -f $seq.full
        !           107: status=0

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