fix: donate EROFS submount FDs in goferless mode#13663
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When an EROFS rootfs runs without a gofer process, runsc still has to provide image FDs for EROFS config mounts. The goferless path only opened the rootfs image, so boot could run out of gofer FDs while preparing submounts. This patch donates EROFS submount image FDs in config mount order and adds a test to cover such case. FUTURE_COPYBARA_INTEGRATE_REVIEW=#13597 from tianyuzhou95:albert/erofs-mount-fix 87177a7 PiperOrigin-RevId: 945300154
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fix: donate EROFS submount FDs in goferless mode
When an EROFS rootfs runs without a gofer process, runsc still has to provide image FDs for EROFS config mounts. The goferless path only opened the rootfs image, so boot could run out of gofer FDs while preparing submounts.
This patch donates EROFS submount image FDs in config mount order and adds a test to cover such case.
FUTURE_COPYBARA_INTEGRATE_REVIEW=#13597 from tianyuzhou95:albert/erofs-mount-fix 87177a7