linux-stable.git/include/linux/netdev_features.h, branch v6.6.145

net: add a common function to compute features for upper devices

2026-07-24T14:02:38+00:00

[ Upstream commit 28098defc79fe7d29e6bfe4eb6312991f6bdc3d3 ]

Some high level software drivers need to compute features from lower
devices. But each has their own implementations and may lost some
feature compute. Let's use one common function to compute features
for kinds of these devices.

The new helper uses the current bond implementation as the reference
one, as the latter already handles all the relevant aspects: netdev
features, TSO limits and dst retention.

Suggested-by: Paolo Abeni 
Signed-off-by: Hangbin Liu 
Reviewed-by: Sabrina Dubroca 
Reviewed-by: Jiri Pirko 
Link: https://patch.msgid.link/20251017034155.61990-2-liuhangbin@gmail.com
Signed-off-by: Jakub Kicinski 
Stable-dep-of: 950803f72547 ("bonding: fix type confusion in bond_setup_by_slave()")
Signed-off-by: Wentao Guan 
Signed-off-by: Sasha Levin

net, team, bonding: Add netdev_base_features helper

2026-07-24T14:02:37+00:00

[ Upstream commit d2516c3a53705f783bb6868df0f4a2b977898a71 ]

Both bonding and team driver have logic to derive the base feature
flags before iterating over their slave devices to refine the set
via netdev_increment_features().

Add a small helper netdev_base_features() so this can be reused
instead of having it open-coded multiple times.

Signed-off-by: Daniel Borkmann 
Cc: Nikolay Aleksandrov 
Cc: Ido Schimmel 
Cc: Jiri Pirko 
Reviewed-by: Hangbin Liu 
Reviewed-by: Nikolay Aleksandrov 
Link: https://patch.msgid.link/20241210141245.327886-1-daniel@iogearbox.net
Signed-off-by: Paolo Abeni 
Signed-off-by: Wentao Guan 
Stable-dep-of: d064ea7fe2a2 ("bonding: Fix initial {vlan,mpls}_feature set in bond_compute_features")
Signed-off-by: Sasha Levin

net: Fix features skip in for_each_netdev_feature()

2022-05-06T01:25:57+00:00

The find_next_netdev_feature() macro gets the "remaining length",
not bit index.
Passing "bit - 1" for the following iteration is wrong as it skips
the adjacent bit. Pass "bit" instead.

Fixes: 3b89ea9c5902 ("net: Fix for_each_netdev_feature on Big endian")
Signed-off-by: Tariq Toukan 
Reviewed-by: Gal Pressman 
Link: https://lore.kernel.org/r/20220504080914.1918-1-tariqt@nvidia.com
Signed-off-by: Jakub Kicinski

net: fix mistake path for netdev_features_strings

2021-06-17T18:32:50+00:00

Th_strings arrays netdev_features_strings, tunable_strings, and
phy_tunable_strings has been moved to file net/ethtool/common.c.
So fixes the comment.

Signed-off-by: Jian Shen 
Signed-off-by: David S. Miller

net: hsr: add offloading support

2021-02-11T21:24:44+00:00

Add support for offloading of HSR/PRP (IEC 62439-3) tag insertion
tag removal, duplicate generation and forwarding.

For HSR, insertion involves the switch adding a 6 byte HSR header after
the 14 byte Ethernet header. For PRP it adds a 6 byte trailer.

Tag removal involves automatically stripping the HSR/PRP header/trailer
in the switch. This is possible when the switch also performs auto
deduplication using the HSR/PRP header/trailer (making it no longer
required).

Forwarding involves automatically forwarding between redundant ports in
an HSR. This is crucial because delay is accumulated as a frame passes
through each node in the ring.

Duplication involves the switch automatically sending a single frame
from the CPU port to both redundant ports. This is required because the
inserted HSR/PRP header/trailer must contain the same sequence number
on the frames sent out both redundant ports.

Export is_hsr_master so DSA can tell them apart from other devices in
dsa_slave_changeupper.

Signed-off-by: George McCollister 
Reviewed-by: Vladimir Oltean 
Signed-off-by: David S. Miller

net: introduce a netdev feature for UDP GRO forwarding

2021-01-24T04:16:24+00:00

Introduce a new netdev feature, NETIF_F_GRO_UDP_FWD, to allow user
to turn UDP GRO on and off for forwarding.
Defaults to off to not change current datapath.

Suggested-by: Paolo Abeni 
Signed-off-by: Alexander Lobakin 
Signed-off-by: Jakub Kicinski

net: add GSO UDP L4 and GSO fraglists to the list of software-backed types

2020-11-04T00:53:55+00:00

Commit e20cf8d3f1f7 ("udp: implement GRO for plain UDP sockets.") and
commit 9fd1ff5d2ac7 ("udp: Support UDP fraglist GRO/GSO.") made UDP L4
and fraglisted GRO/GSO fully supported by the software fallback mode.
We can safely add them to NETIF_F_GSO_SOFTWARE to allow logical/virtual
netdevs to forward these types of skbs up to the real drivers.

Signed-off-by: Alexander Lobakin 
Acked-by: Willem de Bruijn 
Signed-off-by: Jakub Kicinski

net: Fix broken NETIF_F_CSUM_MASK spell in netdev_features.h

2020-09-10T20:30:22+00:00

Remove the weird space inside the NETIF_F_CSUM_MASK.

Signed-off-by: Miaohe Lin 
Signed-off-by: David S. Miller

docs: networking: convert netdev-features.txt to ReST

2020-04-30T19:56:36+00:00

Not much to be done here:

- add SPDX header;
- adjust titles and chapters, adding proper markups;
- add to networking/index.rst.

Signed-off-by: Mauro Carvalho Chehab 
Signed-off-by: David S. Miller

net: introduce the MACSEC netdev feature

2020-03-27T03:17:36+00:00

This patch introduce a new netdev feature, which will be used by drivers
to state they can perform MACsec transformations in hardware.

The patchset was gathered by Mark, macsec functinality itself
was implemented by Dmitry, Mark and Pavel Belous.

Signed-off-by: Antoine Tenart 
Signed-off-by: Mark Starovoytov 
Signed-off-by: Igor Russkikh 
Signed-off-by: David S. Miller