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# ensure that a sparse file is copied efficiently, by default
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# Copyright (C) 2011-2012 Free Software Foundation, Inc.
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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. "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
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# Require a fiemap-enabled FS.
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fiemap_capable_ fiemap_chk ||
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skip_ "this file system lacks FIEMAP support"
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# Exclude ext[23] (or unknown fs types)
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# as the emulated extent scanning can be slow
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df -t ext2 -t ext3 . >/dev/null &&
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skip_ "ext[23] can have slow FIEMAP scanning"
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# Create a large-but-sparse file.
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timeout 10 truncate -s1T f ||
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skip_ "unable to create a 1 TiB sparse file"
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# Disable this test on old BTRFS (e.g. Fedora 14)
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# which reports (unwritten) extents for holes.
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filefrag f || skip_ 'the 'filefrag' utility is missing'
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filefrag f | grep -F ': 0 extents found' > /dev/null ||
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skip_ 'this file system reports extents for holes'
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# Nothing can read (much less write) that many bytes in so little time.
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timeout 10 cp f f2 || fail=1
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# Ensure that the sparse file copied through fiemap has the same size
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# in bytes as the original.
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test "$(stat --printf %s f)" = "$(stat --printf %s f2)" || fail=1
added
removed
tests/cp/fiemap-perf.sh
