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fallocate + read/write tests, ext4 regression tests
New test to test basic mixed fallocate + read & write, includes a couple regression tests for bugs that ext4 hit. Uses xfs_io to generate fallocate calls, so requires git xfsprogs and very recent glibc at this point. Ext4 folks, this is hopefully a reasonable example of how to add a new test. :) Signed-off-by: Eric Sandeen <sandeen@sandeen.net> Reviewed-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Eric Sandeen
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#! /bin/sh
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# FS QA Test No. 214
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#
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# Basic unwritten extent sanity checks
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#
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#-----------------------------------------------------------------------
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# Copyright (c) 2009 Red Hat, Inc. All Rights Reserved.
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License as
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# published by the Free Software Foundation.
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#
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# This program is distributed in the hope that it would 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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#
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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, write the Free Software Foundation,
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# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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#
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#-----------------------------------------------------------------------
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#
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# creator
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owner=sandeen@sandeen.net
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seq=`basename $0`
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echo "QA output created by $seq"
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_cleanup()
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{
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cd /
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rm -f $tmp.*
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}
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here=`pwd`
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tmp=$TEST_DIR/$$
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status=1 # failure is the default!
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trap "_cleanup; exit \$status" 0 1 2 3 15
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# get standard environment, filters and checks
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. ./common.rc
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. ./common.filter
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# real QA test starts here
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# generic, but xfs_io's fallocate must work
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_supported_fs generic
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# only Linux supports fallocate
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_supported_os Linux
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[ -n "$XFS_IO_PROG" ] || _notrun "xfs_io executable not found"
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rm -f $seq.full
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testio=`$XFS_IO_PROG -F -f -c "falloc 0 1m" $TEST_DIR/$tmp.io 2>&1`
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# Old xfs_io doesn't have fallocate support
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echo $testio | grep -q "not found" && \
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_notrun "xfs_io fallocate support is missing"
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# Old glibc, old kernels, and some filesystems don't have fallocate support
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echo $testio | grep -q "Operation not supported" && \
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_notrun "xfs_io fallocate command failed (old kernel? wrong fs?)"
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# Ok, off we go.
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# Super-trivial; preallocate a region and read it; get 0s.
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echo "=== falloc & read ==="
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$XFS_IO_PROG -F -f \
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-c 'falloc 0 4096' \
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-c 'pread -v 0 4096' \
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$TEST_DIR/ouch | _filter_xfs_io_unique
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rm -f $TEST_DIR/ouch
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# Preallocate a chunk, write 1 byte, read it all back.
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# Should get no stale data. Early ext4 bug.
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echo "=== falloc, write beginning, read ==="
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$XFS_IO_PROG -F -f \
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-c 'falloc 0 512' \
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-c 'pwrite 0 1' \
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-c 'pread -v 0 512' \
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$TEST_DIR/ouch | _filter_xfs_io_unique
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rm -f $TEST_DIR/ouch
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# Same but write in the middle of the region
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echo "=== falloc, write middle, read ==="
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$XFS_IO_PROG -F -f \
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-c 'falloc 0 512' \
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-c 'pwrite 256 1' \
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-c 'pread -v 0 512' \
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$TEST_DIR/ouch | _filter_xfs_io_unique
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rm -f $TEST_DIR/ouch
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# Same but write the end of the region
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echo "=== falloc, write end, read ==="
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$XFS_IO_PROG -F -f \
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-c 'falloc 0 512' \
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-c 'pwrite 511 1' \
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-c 'pread -v 0 512' \
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$TEST_DIR/ouch | _filter_xfs_io_unique
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rm -f $TEST_DIR/ouch
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# Reported by IBM on ext4.
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#
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# Fixed by commit a41f20716975910d9beb90b7efc61107901492b8
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#
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# The file was previously preallocated, and then initialized the middle of
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# the preallocation area using Direct IO write, then overwrite part of
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# initialized area. Later after truncate the file (to the middle of the
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# initialized data), the initialized data *before* the new file size was
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# gone after remount the filesystem.
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echo "=== falloc, write, sync, truncate, read ==="
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# Allocate, write, sync, truncate (buffered)
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$XFS_IO_PROG -F -f \
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-c 'falloc 0x0 0x65C00' \
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-c 'pwrite -S 0xAA 0x12000 0x10000' \
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-c 'fsync' \
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-c 'truncate 0x16000' \
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$TEST_DIR/ouch | _filter_xfs_io_unique
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# now do a direct read and see what's on-disk
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$XFS_IO_PROG -F -f -d \
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-c 'pread -v 0 0x16000' \
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$TEST_DIR/ouch | _filter_xfs_io_unique
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rm -f $TEST_DIR/ouch
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# success, all done
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status=0
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exit
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@@ -0,0 +1,41 @@
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QA output created by 214
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=== falloc & read ===
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00000000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
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*
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read 4096/4096 bytes at offset 0
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XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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=== falloc, write beginning, read ===
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wrote 1/1 bytes at offset 0
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XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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00000000: cd 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
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00000010: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
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*
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read 512/512 bytes at offset 0
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XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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=== falloc, write middle, read ===
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wrote 1/1 bytes at offset 256
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XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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00000000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
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*
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00000100: cd 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
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00000110: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
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*
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read 512/512 bytes at offset 0
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XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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=== falloc, write end, read ===
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wrote 1/1 bytes at offset 511
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XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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00000000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
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*
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000001f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 cd ................
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read 512/512 bytes at offset 0
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XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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=== falloc, write, sync, truncate, read ===
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wrote 65536/65536 bytes at offset 73728
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XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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00000000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
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*
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00012000: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
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*
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read 90112/90112 bytes at offset 0
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XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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