60 lines
1.6 KiB
Markdown
60 lines
1.6 KiB
Markdown
# Test Case: Packed-Inode Fragments
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**Test ID**: TC098-fragments-support
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**Category**: Compression
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**Priority**: High
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## Objective
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Verify a deterministic whole-file fragment stored in the EROFS packed inode,
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including full and offset reads. This is an in-image packed inode, not an
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external fragment device.
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## Fixture qualification
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Use fresh `fragment.erofs`. The generator runs:
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```sh
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mkfs.erofs -T0 --all-time --all-root --workers=1 \
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-U67360098-0000-0000-0000-000000000098 \
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-zlz4 -C65536 -E all-fragments fragment.erofs sources/fragment
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```
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The manifest and verifier must report a nonzero packed NID, fragment feature,
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and compressed layout for `/fragment.dat`. Host fsck extracts and compares the
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entire source before guest testing.
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## Manual procedure
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```sh
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I=/root/repo22-g6/images
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S=/root/repo22-g6/sources/fragment
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mkdir -p /mnt/g6
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kldload /root/repo22-g6/erofs.ko
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mdconfig -a -t vnode -f "$I/fragment.erofs" -u 90
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mount -t erofs -o ro /dev/md90 /mnt/g6
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stat -f '%z' /mnt/g6/fragment.dat
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sha256 "$S/fragment.dat" /mnt/g6/fragment.dat
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cmp "$S/fragment.dat" /mnt/g6/fragment.dat
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dd if="$S/fragment.dat" of=/tmp/tc098.src bs=1 skip=65536 count=8192 2>/dev/null
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dd if=/mnt/g6/fragment.dat of=/tmp/tc098.mnt bs=1 skip=65536 count=8192 2>/dev/null
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cmp /tmp/tc098.src /tmp/tc098.mnt
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```
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The size must be 100000 bytes, and all comparisons must pass.
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## Cleanup and zero-state check
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```sh
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umount /mnt/g6
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mdconfig -d -u 90
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kldunload erofs
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rm -f /tmp/tc098.src /tmp/tc098.mnt
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mount -p | awk '$3 == "erofs" { print }'
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mdconfig -l
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kldstat -n erofs 2>/dev/null || true
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sysctl -n kern.geom.conftxt | grep -E 'md90|erofs' || true
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```
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All four final outputs must be empty.
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