linux_dsm_epyc7002/drivers/net/bonding
Jarod Wilson 007ab53455 bonding: fix feature flag setting at init time
Don't try to adjust XFRM support flags if the bond device isn't yet
registered. Bad things can currently happen when netdev_change_features()
is called without having wanted_features fully filled in yet. This code
runs both on post-module-load mode changes, as well as at module init
time, and when run at module init time, it is before register_netdevice()
has been called and filled in wanted_features. The empty wanted_features
led to features also getting emptied out, which was definitely not the
intended behavior, so prevent that from happening.

Originally, I'd hoped to stop adjusting wanted_features at all in the
bonding driver, as it's documented as being something only the network
core should touch, but we actually do need to do this to properly update
both the features and wanted_features fields when changing the bond type,
or we get to a situation where ethtool sees:

    esp-hw-offload: off [requested on]

I do think we should be using netdev_update_features instead of
netdev_change_features here though, so we only send notifiers when the
features actually changed.

Fixes: a3b658cfb6 ("bonding: allow xfrm offload setup post-module-load")
Reported-by: Ivan Vecera <ivecera@redhat.com>
Suggested-by: Ivan Vecera <ivecera@redhat.com>
Cc: Jay Vosburgh <j.vosburgh@gmail.com>
Cc: Veaceslav Falico <vfalico@gmail.com>
Cc: Andy Gospodarek <andy@greyhouse.net>
Signed-off-by: Jarod Wilson <jarod@redhat.com>
Link: https://lore.kernel.org/r/20201205172229.576587-1-jarod@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2020-12-08 11:26:08 -08:00
..
bond_3ad.c treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
bond_alb.c net: core: introduce struct netdev_nested_priv for nested interface infrastructure 2020-09-28 15:00:15 -07:00
bond_debugfs.c bonding: no need to print a message if debugfs_create_dir() fails 2019-08-10 15:25:47 -07:00
bond_main.c bonding: wait for sysfs kobject destruction before freeing struct slave 2020-11-21 13:07:00 -08:00
bond_netlink.c bonding: check return value of register_netdevice() in bond_newlink() 2020-07-23 15:17:04 -07:00
bond_options.c bonding: fix feature flag setting at init time 2020-12-08 11:26:08 -08:00
bond_procfs.c bonding: add an option to specify a delay between peer notifications 2019-07-04 12:30:48 -07:00
bond_sysfs_slave.c bonding: wait for sysfs kobject destruction before freeing struct slave 2020-11-21 13:07:00 -08:00
bond_sysfs.c bonding: add an option to specify a delay between peer notifications 2019-07-04 12:30:48 -07:00
bonding_priv.h drivers: Remove inclusion of vermagic header 2020-04-21 13:27:37 -07:00
Makefile treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00