Phase 4 (syscall): merged upstream 0.9.0 — reservation API (openat_into/dup_into) + removed legacy syscalls. Both old and new APIs coexist for backward compatibility.
Phase 2 (kernel): added openat_into() and dup_into() handlers to fs.rs, registered SYS_OPENAT_INTO and SYS_DUP_INTO in syscall dispatch mod.rs.
Phase 1 (bootstrap): migrated initnsmgr.rs from openat_with_filter→openat_into + unlinkat_with_filter→unlinkat.
vasilito
fcfdea1998