diff options
| author | Jakub Kicinski <kuba@kernel.org> | 2026-06-04 17:29:03 -0700 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2026-06-09 10:13:04 -0700 |
| commit | 97f51bf91b3afa8819fa10e9282e3f2328bb78e4 (patch) | |
| tree | faa1fa2dbd9cf41bbb22f887e0c83f2bb0d7c1db /include/linux | |
| parent | ded86da4bbb78cad74cecc368fee3ae3a296e2ca (diff) | |
| download | lwn-97f51bf91b3afa8819fa10e9282e3f2328bb78e4.tar.gz lwn-97f51bf91b3afa8819fa10e9282e3f2328bb78e4.zip | |
net: ethtool: make dev->hwprov ops-protected
dev->hwprov tracks the active hwtstamp provider for the device.
Make it ops protected (instance lock if the netdev driver opts
into holding instance lock around callbacks, otherwise rtnl_lock).
hwprov is written and read in:
- drivers/net/phy/phy_device.c
phydev and ops protection don't currently mix, add a comment
- net/ethtool/
as of now holds both rtnl lock and ops lock, this one will
soon only hold one lock or the other
read in:
- net/core/dev_ioctl.c
holds both rtnl lock and ops lock
- net/core/timestamping.c
RCU reader
The new netdev_ops_lock_dereference() helper does not have
"compat" in the name. The name would be quite long and I think
in this case it should be obvious that we need _a_ lock.
netdev_lock_dereference() already exists and means dev->lock
is always expected.
Reviewed-by: Eric Dumazet <edumazet@google.com>
Acked-by: Stanislav Fomichev <sdf@fomichev.me>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Link: https://patch.msgid.link/20260605002912.3456868-4-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/netdevice.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index 74507c006490..a8709d0cc8d4 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -2583,6 +2583,9 @@ struct net_device { * Double protects: * @up, @moving_ns, @nd_net, @xdp_features * + * Ops protects: + * @hwprov + * * Double ops protects: * @real_num_rx_queues, @real_num_tx_queues * |