mirror of
https://github.com/linux-apfs/apfstests.git
synced 2026-05-01 15:01:44 -07:00
Eric Sandeen
9890a9a98f
Related to http://oss.sgi.com/bugzilla/show_bug.cgi?id=801 Latest patch posted on that bug makes this testcase pass... first 2 tests are simple buffred writ tests making sure stale data isn't exposed, and hole-blocks aren't mapped. 2nd 2 tests are more related to the above bug, tricky testcase uncovered by fsx on ppc64 which actually re-maps a block which should be a hole, bringing stale data back into existence. V2, don't use non-posix awk extensions Signed-off-by: Eric Sandeen <sandeen@sandeen.net> Reviewed-by: Christoph Hellwig <hch@lst.de>
207 lines
5.7 KiB
Bash
207 lines
5.7 KiB
Bash
#! /bin/sh
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# FS QA Test No. 194
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#
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# Test mapping around/over holes for sub-page blocks
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#
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#-----------------------------------------------------------------------
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# Copyright (c) 2008 Eric Sandeen. All Rights Reserved.
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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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here=`pwd`
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tmp=/tmp/$$
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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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_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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# get standard environment, filters and checks
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. ./common.rc
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. ./common.filter
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# only xfs supported due to use of xfs_bmap
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_supported_fs xfs
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_supported_os IRIX Linux
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# real QA test starts here
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rm -f $seq.full
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# For this test we use block size = 1/8 page size
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pgsize=`$here/src/feature -s`
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blksize=`expr $pgsize / 8`
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# Filter out file mountpoint and physical location info
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# Input:
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# EXT: FILE-OFFSET BLOCK-RANGE AG AG-OFFSET TOTAL
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# 0: [0..63]: 160..223 0 (160..223) 64
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# 1: [64..127]: hole 64
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# Output:
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# SCRATCH_MNT/testfile4: TYPE
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# EXT: TYPE TOTAL
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# 0: blocks 1
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# 1: hole 1
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_filter_bmap()
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{
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tee -a $seq.full | \
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sed "s#$SCRATCH_MNT#SCRATCH_MNT#g" | \
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awk \
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'$3 ~ /hole/ { print $1 "\t" $3 "\t" ($4 * 512) / blksize; next }
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$1 ~ /^[0-9]/ { print $1 "\tblocks\t" ($6 * 512) / blksize; next }
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$1 ~ /^SCRATCH/ { print $1; next }
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{ print $1 "\tTYPE\t" $6 }' blksize=$blksize
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}
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# Filter out offsets, which vary by blocksize
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_filter_od()
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{
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tee -a $seq.full | \
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sed -e "s/^[0-9A-Fa-f ]\{7,8\}//"
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}
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_require_scratch
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unset MKFS_OPTIONS
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unset XFS_MKFS_OPTIONS
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_scratch_mkfs_xfs -b size=$blksize >/dev/null 2>&1
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_scratch_mount
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# 512b block / 4k page example:
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#
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#1) Write 1k of data (buffered):
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#
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# |1111|1111|
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#
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# 2) ftruncate back to 256 bytes:
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#
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# |1100|
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#
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# 3) ftruncate out to 4k: ("H" means hole (expected))
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#
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# |1100|HHHH|HHHH|HHHH|HHHH|HHHH|HHHH|HHHH|
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#
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# So we should have 1 block of data/0, 7 blocks of holes.
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#
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# 4) check what's there with a direct IO read
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#
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# In fact what I get is 1 block of data/0, 1 block of 0's, and 7 blocks of
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# garbage:
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#
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# |1100|0000|GGGG|GGGG|GGGG|GGGG|GGGG|GGGG|
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#
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# The garbage is in fact stale data from the disk.
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#
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# Check that we don't get stale data and that the hole is a hole:
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echo "== Test 1 =="
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# Write, truncate in, truncate out
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xfs_io \
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-c "pwrite -S 0x11 -b `expr $pgsize / 2` 0 `expr $pgsize / 2`" \
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-c "truncate `expr $blksize / 2`" \
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-c "truncate $pgsize" \
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-t -f $SCRATCH_MNT/testfile1 >> $seq.full
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# directio read of entire file
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xfs_io \
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-c "pread 0 $pgsize" \
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-d $SCRATCH_MNT/testfile1 >> $seq.full
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xfs_bmap -v $SCRATCH_MNT/testfile1 | _filter_bmap
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od -x $SCRATCH_MNT/testfile1 | _filter_od
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# Similar but write another block to create block/hole/block/hole
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echo "== Test 2 =="
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# Write, truncate in, truncate out, write to middle
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xfs_io \
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-c "pwrite -S 0x11 -b `expr $pgsize / 2` 0 `expr $pgsize / 2`" \
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-c "truncate `expr $blksize / 2`" \
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-c "truncate $pgsize" \
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-c "pwrite -S 0x22 -b $blksize `expr $blksize \* 4` $blksize" \
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-t -f $SCRATCH_MNT/testfile2 >> $seq.full
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# directio read of entire file
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xfs_io \
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-c "pread 0 $pgsize" \
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-d $SCRATCH_MNT/testfile2 >> $seq.full
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xfs_bmap -v $SCRATCH_MNT/testfile2 | _filter_bmap
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od -x $SCRATCH_MNT/testfile2 | _filter_od
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# 512 byte block / 4k page example:
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# direct write 1 page (8 blocks) of "0x11" to 0x1000
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# map read 1 block, 512 (0x200) at 0
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# truncate to half a block, 256 (0x100)
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# truncate to block+1, 513 (0x201)
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# direct write "0x22" for 1 block at offset 2048 (0x800)
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# |1111|1111|1111|1111|1111|1111|1111|1111| Write 1's
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# |MRMR|1111|1111|1111|1111|1111|1111|1111| mapread
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# |11--| truncate down
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# |1100|0---| truncate up, block+1
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# | | |HHHH|HHHH|2222| Write 2's (extending)
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# |uptodate?|
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# |1100|0000|1111|1111|2222|----|----|----| <- potential badness
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# We're looking for this badness due to mapping over a hole:
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# Exposes stale data from 0x400 (1024) through 0x800 (2048)
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# 00000000 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 |................|
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# *
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# 00000100 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
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# *
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# 00000400 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 |................| <- BAD
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# *
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# 00000800 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 |""""""""""""""""|
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# *
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# 00000a00
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# We *should* get:
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# |1100|HHHH|HHHH|HHHH|2222|----|----|----|
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echo "== Test 3 =="
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xfs_io \
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-c "pwrite -S 0x11 -b $pgsize 0 $pgsize" \
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-c "mmap -r 0 $blksize" -c "mread 0 $blksize" -c "munmap" \
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-c "truncate `expr $blksize / 2`" \
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-c "truncate `expr $blksize + 1`" \
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-c "pwrite -S 0x22 -b $blksize `expr $pgsize / 2` $blksize" \
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-t -d -f $SCRATCH_MNT/testfile3 >> $seq.full
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xfs_bmap -v $SCRATCH_MNT/testfile3 | _filter_bmap
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od -x $SCRATCH_MNT/testfile3 | _filter_od
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# Now try the same thing but write a sector in the middle of that hole
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# If things go badly stale data will be exposed either side.
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# This is most interesting for block size > 512 (page size > 4096)
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# We *should* get:
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# |1100|HHHH|33HH|HHHH|2222|----|----|----|
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echo "== Test 4 =="
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xfs_io \
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-c "pwrite -S 0x11 -b $pgsize 0 $pgsize" \
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-c "mmap -r 0 $blksize" -c "mread 0 $blksize" -c "munmap" \
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-c "truncate `expr $blksize / 2`" \
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-c "truncate `expr $blksize + 1`" \
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-c "pwrite -S 0x22 -b $blksize `expr $pgsize / 2` $blksize" \
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-c "pwrite -S 0x33 -b 512 `expr $blksize \* 2` 512" \
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-t -d -f $SCRATCH_MNT/testfile4 >> $seq.full
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xfs_bmap -v $SCRATCH_MNT/testfile4 | _filter_bmap
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od -x $SCRATCH_MNT/testfile4 | _filter_od
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# success, all done
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status=0
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exit
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