update

2026-08-18 09:20:44 +02:00
commit b826cd721a
522 changed files with 93730 additions and 0 deletions
@@ -0,0 +1,38 @@
+# Test Case: Extended Inode File Above 4 GiB
+
+**Test ID**: TC024-extended-inode-large
+
+## Objective
+
+Verify a 64-bit extended `i_size` above 4 GiB without materializing a multi-GiB
+payload, using deterministic FLAT_PLAIN hole reads at distant offsets.
+
+## Fixture
+
+Use `images/extended-large-hole.erofs` and
+`expected/large-hole-zero-64k.bin`. Structured evidence asserts a 64-byte
+inode, size `4294971393`, layout 0, `startblk=0xffffffffffff`, valid CRC, and
+an all-zero content descriptor.
+
+## Procedure
+
+After mounting, run three bounded reads:
+
+```sh
+stat -f 'size=%z blocks=%b mode=%p' "$mnt/huge-sparse.dat"
+./read_probe pread "$mnt/huge-sparse.dat" 0 65536 /tmp/tc024-start
+./read_probe pread "$mnt/huge-sparse.dat" 2147483648 65536 /tmp/tc024-middle
+./read_probe pread "$mnt/huge-sparse.dat" 4294905857 65536 /tmp/tc024-end
+cmp /tmp/repo22-g1/expected/large-hole-zero-64k.bin /tmp/tc024-start
+cmp /tmp/repo22-g1/expected/large-hole-zero-64k.bin /tmp/tc024-middle
+cmp /tmp/repo22-g1/expected/large-hole-zero-64k.bin /tmp/tc024-end
+sha256 /tmp/tc024-start /tmp/tc024-middle /tmp/tc024-end
+```
+
+Remove outputs, unmount, and detach.
+
+## Expected Results
+
+- Size is exactly `4294971393`, not truncated to 32 bits.
+- Start, middle, and final 64 KiB ranges match the deterministic zero source.
+- Reads are bounded, no large allocation/panic occurs, and cleanup succeeds.