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This adds a new ng_device command, NGM_DEVICE_ETHERALIGN, which has no associated args. After the command arrives, the device begins adjusting all packets sent out its hook to have ETHER_ALIGN bytes of padding at the beginning of the packet. The ETHER_ALIGN padding is added only when running on an architecture that requires strict alignment of IP headers (based on the __NO_STRICT_ALIGNMENT macro, which is only #define'd on x86 as of this writing). This also adds ascii <-> binary command translation to ng_device, both for the existing NGM_DEVICE_GET_DEVNAME and the new ETHERALIGN command. This also gives a name to every ng_device node when it is constructed, using the cdev device name (ngd0, ngd1, etc). This makes it easier to address command msgs to the device using ngctl(8). Reviewed by: donner, ray, adrian Differential Revision: https://reviews.freebsd.org/D32905 MFC after: 1 week |
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