43 lines
1.2 KiB
Markdown
43 lines
1.2 KiB
Markdown
# Test Case: Superblock Parsing
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**Test ID**: TC014-superblock-parse
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## Objective
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Verify mandatory superblock fields at their real on-disk offsets and compare
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the mounted values exposed by FreeBSD.
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## Fixture
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Use `images/compact.erofs`, its image hash, `fixture-evidence.txt`, and
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`tests/statfs_probe.c`.
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## Procedure
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Host inspection:
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```sh
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od -An -tx4 -j 1024 -N 4 /work/build/repo22-g1/images/compact.erofs
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od -An -tu1 -j 1036 -N 1 /work/build/repo22-g1/images/compact.erofs
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od -An -tu2 -j 1038 -N 2 /work/build/repo22-g1/images/compact.erofs
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od -An -tu8 -j 1040 -N 8 /work/build/repo22-g1/images/compact.erofs
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od -An -tu4 -j 1060 -N 8 /work/build/repo22-g1/images/compact.erofs
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dump.erofs -s /work/build/repo22-g1/images/compact.erofs
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python3 tests/erofs_fixture.py inspect /work/build/repo22-g1/images/compact.erofs
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```
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Mount the same hashed image in FreeBSD, then run:
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```sh
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./statfs_probe "$mnt"
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stat -f 'root_ino=%i type=%HT' "$mnt"
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mount -p | awk -v p="$mnt" '$2 == p'
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```
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## Expected Results
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- Magic is `0xe0f5e1e2`, `blkszbits=12`, and checksum validation is true.
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- Root NID, block count, and inode count agree with root `stat` and
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`statfs_probe`; filesystem type is `erofs` and read-only.
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- No parser error appears in the dmesg delta; cleanup succeeds.
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