src/sys/dev/virtio/network, branch main

vtnet: remove M_HASHTYPE when there is only one pair of rx/tx queue

2026-01-28T21:46:07+00:00

Summary:
Doing so will let the upper layer know how to deal with software hash,
with benefits like inp_flowid can be set and m_pkthdr.flowid can be set
in output path.

Reviewed by: tuexen
Differential Revision: https://reviews.freebsd.org/D54929

vtnet: improve consistency

2025-12-19T16:44:20+00:00

Use sbuf_new_for_sysctl() instead of sbuf_new_auto() when exposing
the flags via sysctl.

MFC after:		1 week

vtnet: expose features via sysctl tree

2025-12-19T16:38:35+00:00

Right now the 64-bit flags field needs to be casted to a 32-bit field,
because clang warns if more than 32-bits are used.
Once clang is fixed, this restriction will be removed and more bits
will be added.

Reviewed by:		markj, Timo Völker
MFC after:		1 week
Differential Revision:	https://reviews.freebsd.org/D54288

vtnet: expose flags via sysctl tree

2025-12-18T14:42:13+00:00

Provide the flags used for a vtnet interface via the sysctl tree.
This is mostly used for debugging purposes.

Reviewed by:		Timo Völker
MFC after:		1 week
Differential Revision:	https://reviews.freebsd.org/D54283

vtnet: define flags in a consistent way

2025-12-18T12:41:29+00:00

This allows adding flags in the upper 32 bits in a consistent way.
No functional change intended.

MFC after:	1 week

vtnet: fix enabling/disabling tso

2025-11-10T15:34:53+00:00

Transmit segment offloading depends on transmit checksum offloading.
Enforce that constraint. This also fixes a bug, since if_hwassist bits
are from the CSUM_ space, not from the IFCAP_ space.

PR:			290773
Reviewed by:		Timo Völker
Tested by:		lg@efficientip.com
MFC after:		3 days
Differential Revision:	https://reviews.freebsd.org/D53629

vtnet: don't provide VIRTIO_NET_HDR_F_DATA_VALID

2025-11-10T15:28:04+00:00

According to section 5.1.6.2.1 of version 1.3 of the virtio
specification, the driver MUST NOT set VIRTIO_NET_HDR_F_DATA_VALID in
the flags. So don't do that.

Reviewed by: 		Timo Völker
MFC after:		3 days
Differential Revision:	https://reviews.freebsd.org/D53650

vtnet: disable hardware TCP LRO by default

2025-09-30T00:03:49+00:00

Hardware TCP LRO results in problems in settings with IP forwarding
being enabled. In case of nodes without IP forwarding, using
software LRO is also beneficial in general, since it can provide better
information about what was received on the wire.
Therefore, disable hardware TCP LRO by default.
By tuning the loader tunable, this can be changed.

PR:			263229
Reviewed by:		Timo Völker
MFC after:		3 days
Differential Revision:	https://reviews.freebsd.org/D52684

vtnet: improve control of transmit offloading

2025-09-28T09:01:18+00:00

Keep the hwassist flags for transmit checksum offload and transmit
segment offload in sync with the enabled capabilities.

Reported by:		Timo Völker
Reviewed by:		Timo Völker
MFC after:		3 days
Differential Revision:	https://reviews.freebsd.org/D52765

vtnet: improve interface capability handling

2025-09-26T10:12:51+00:00

Enable the handling of the IFCAP_RXCSUM_IPV6 handling by handling
IFCAP_RXCSUM and IFCAP_RXCSUM_IPV6 as a pair. Also make clear, that
software and hardware LRO require receive checksum offload.

Reviewed by:		Timo Völker
MFC after:		3 days
Differential Revision:	https://reviews.freebsd.org/D52682