56 lines
1.8 KiB
Markdown
56 lines
1.8 KiB
Markdown
# Test Case: 255-byte Filename
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**Test ID**: TC123-long-filename
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**Category**: Boundary & Stress
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**Priority**: Medium
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**Regression**: None
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## Objective
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Verify exact `NAME_MAX` lookup, readdir name bytes, stat, and file content.
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## Preconditions
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- Complete `G7-MANUAL-SETUP.md`.
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- Use the fixture's ASCII `LONG-NAME`; its byte count must be 255.
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## Manual Steps
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```sh
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G7=/root/repo22-g7
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FIX=$G7/fixtures
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SRCROOT=$FIX/sources/boundaries
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IMAGE=$FIX/images/boundaries.erofs
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MNT=/mnt/repo22-g7-tc123
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E=$G7/evidence/TC123
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mkdir -p "$MNT" "$E"
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long_name=$(cat "$FIX/LONG-NAME")
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name_bytes=$(printf '%s' "$long_name" | wc -c | tr -d ' ')
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printf 'name_bytes=%s\nname=%s\n' "$name_bytes" "$long_name" \
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| tee "$E/name.txt"
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test "$name_bytes" -eq 255
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unit=$(mdconfig -a -t vnode -f "$IMAGE")
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mount -t erofs -o ro "/dev/$unit" "$MNT"
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(cd "$SRCROOT" && find longname -type f -print | sort) > "$E/source.names"
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(cd "$MNT" && find longname -type f -print | sort) > "$E/target.names"
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cmp "$E/source.names" "$E/target.names"
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test "$(wc -l < "$E/target.names" | tr -d ' ')" -eq 1
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stat -f 'size=%z name=%N' "$MNT/longname/$long_name" | tee "$E/stat.txt"
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cmp "$SRCROOT/longname/$long_name" "$MNT/longname/$long_name"
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source_hash=$(sha256 -q "$SRCROOT/longname/$long_name")
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target_hash=$(sha256 -q "$MNT/longname/$long_name")
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printf 'source=%s\ntarget=%s\n' "$source_hash" "$target_hash" \
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| tee "$E/hashes.txt"
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test "$source_hash" = "$target_hash"
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umount "$MNT"
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mdconfig -d -u "${unit#md}"
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test -z "$(mount -p | awk -v m="$MNT" '$2 == m { print }')"
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test -z "$(mdconfig -l | tr ' ' '\n' | grep -x "$unit")"
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```
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## PASS Gate
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- The filename is exactly 255 bytes and readdir returns that one exact name.
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- Stat succeeds; source/mount `cmp` and SHA256 values match.
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- No truncation, extra entry, panic, hang, or cleanup leak occurs.
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