I've been doing this for years, and akpm picked me up on it about 12 months ago. lguest partly serves as example code, so let's do it Right. Also, remove two unused fields in struct vblk_info in the example launcher. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Cc: Ingo Molnar <mingo@redhat.com>
Qemu added support for a few extra RX modes that Linux doesn't currently make use of. Sync the headers to maintain consistency. Signed-off-by: Alex Williamson <alex.williamson@hp.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
virtio_net.h uses the macro ETH_ALEN which is defined in linux/if_ether.h. Discovered when hacking on virtio-over-pci patches. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Signed-off-by: David S. Miller <davem@davemloft.net>
VLAN filtering allows the hypervisor to drop packets from VLANs that we're not a part of, further reducing the number of extraneous packets recieved. This makes use of the VLAN virtqueue command class. The CTRL_VLAN feature bit tells us whether the backend supports VLAN filtering. Signed-off-by: Alex Williamson <alex.williamson@hp.com> Acked-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: David S. Miller <davem@davemloft.net>
Make use of the MAC control virtqueue class to support a MAC filter table. The filter table is managed by the hypervisor. We consider the table to be available if the CTRL_RX feature bit is set. We leave it to the hypervisor to manage the table and enable promiscuous or all-multi mode as necessary depending on the resources available to it. Signed-off-by: Alex Williamson <alex.williamson@hp.com> Acked-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: David S. Miller <davem@davemloft.net>
Make use of the RX_MODE control virtqueue class to enable the set_rx_mode netdev interface. This allows us to selectively enable/disable promiscuous and allmulti mode so we don't see packets we don't want. For now, we automatically enable these as needed if additional unicast or multicast addresses are requested. Signed-off-by: Alex Williamson <alex.williamson@hp.com> Acked-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: David S. Miller <davem@davemloft.net>
This will be used for RX mode, MAC filter table, VLAN filtering, etc... The control transaction consists of one or more "out" sg entries and one or more "in" sg entries. The first out entry contains a header defining the class and command. Additional out entries may provide data for the command. The last in entry provides a status response back from the command. Virtqueues typically run asynchronous, running a callback function when there's data in the channel. We can't readily make use of this in the command paths where we need to use this. Instead, we kick the virtqueue and spin. The kick causes an I/O write, triggering an immediate trap into the hypervisor. Signed-off-by: Alex Williamson <alex.williamson@hp.com> Acked-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: David S. Miller <davem@davemloft.net>
Conflicts: drivers/net/Kconfig
fix the following 'make headers_check' warning:
usr/include/linux/virtio_net.h:28: found __[us]{8,16,32,64} type without #include <linux/types.h>
Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com>
Allow the host to inform us that the link is down by adding a VIRTIO_NET_F_STATUS which indicates that device status is available in virtio_net config. This is currently useful for simulating link down conditions (e.g. using proposed qemu 'set_link' monitor command) but would also be needed if we were to support device assignment via virtio. Signed-off-by: Mark McLoughlin <markmc@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> (added future masking) Signed-off-by: David S. Miller <davem@davemloft.net>