1016 B
Test Case: Readdir Cookies and seekdir Resume
Test ID: TC048-readdir-seek Category: Directory Operations Priority: Critical
Objective
Verify every kernel d_off and libc telldir cookie resumes at the next exact entry; complete second traversals are not substitutes.
Procedure
Mount metadata/namei-base.erofs and run:
./readdir_probe /tmp/repo22-g3/mnt/wide 128 |
tee TC048-probe.out
Probe Contract
The helper fails on non-increasing cookies, invalid records, duplicate names, kernel/libc order or type differences, a restart at the wrong next name, or a final cookie that does not reach EOF. Kernel d_off values are validated after reopen/lseek; each libc telldir value is passed back to seekdir on the same DIR stream that produced it, as required by the API contract.
Expected Results
The helper exits zero and reports entries=322, d_off_restarts=322, seekdir_restarts=322, buffer=128, the type counts, and one FNV-1a name/type hash. Record literal output and cleanup.