erofs-freebsd-out-tree/tests/TC099-multidev-2devices.md

Test Case: Primary Plus One mkfs Blob Provider

Test ID: TC099-multidev-2devices
Category: Multi-Device
Priority: Critical

Objective

Verify the common two-provider layout emitted directly by erofs-utils 1.8.6, including statfs aggregation and fail-closed omission of the blob provider.

Positive procedure

I=/root/repo22-g6/images
S=/root/repo22-g6/sources/chunk
mkdir -p /mnt/g6
kldload /root/repo22-g6/erofs.ko
mdconfig -a -t vnode -f "$I/mkfs-blob-primary.erofs" -u 90
mdconfig -a -t vnode -f "$I/mkfs-blob-slot1.blob" -u 91
mount -t erofs -o ro -o device.1=/dev/md91 /dev/md90 /mnt/g6
mount -p | grep '/mnt/g6'
df -k /mnt/g6
sha256 "$S/tc006.bin" /mnt/g6/tc006.bin
cmp "$S/tc006.bin" /mnt/g6/tc006.bin
dd if="$S/tc006.bin" of=/tmp/tc099.src bs=1 skip=28672 count=8192 2>/dev/null
dd if=/mnt/g6/tc006.bin of=/tmp/tc099.mnt bs=1 skip=28672 count=8192 2>/dev/null
cmp /tmp/tc099.src /tmp/tc099.mnt

The manifest reports primary blocks 1 and slot blocks 224, so df -k must report 900 one-kilobyte blocks. Metadata comes from md90; all file bytes come from md91.

Unmount and detach both providers before the negative step.

Missing blob option

umount /mnt/g6
mdconfig -d -u 91
mdconfig -d -u 90
mdconfig -a -t vnode -f "$I/mkfs-blob-primary.erofs" -u 90
truss -f -o /tmp/tc099-enxio.truss mount -t erofs -o ro \
  /dev/md90 /mnt/g6
tail -20 /tmp/tc099-enxio.truss

Mount must return exactly ENXIO: the 4096-byte split primary is shorter than the declared flatdev range.

Cleanup and zero-state check

mdconfig -d -u 90
kldunload erofs
rm -f /tmp/tc099.src /tmp/tc099.mnt
mount -p | awk '$3 == "erofs" { print }'
mdconfig -l
kldstat -n erofs 2>/dev/null || true
sysctl -n kern.geom.conftxt | grep -E 'md9[01]|erofs' || true

All four final outputs must be empty.