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net: watchdog: add net device refcount tracker

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Add a netdevice_tracker inside struct net_device, to track
the self reference when a device has an active watchdog timer.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Eric Dumazet 2021-12-06 17:30:30 -08:00 • committed by Jakub Kicinski
parent b2dcdc7f73
commit f12bf6f3f9
2 changed files with 8 additions and 4 deletions
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2
include/linux/netdevice.h
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@ -1951,6 +1951,7 @@ enum netdev_ml_priv_type {
*
* @dev_addr_shadow: Copy of @dev_addr to catch direct writes.
* @linkwatch_dev_tracker: refcount tracker used by linkwatch.
* @watchdog_dev_tracker: refcount tracker used by watchdog.
*
* FIXME: cleanup struct net_device such that network protocol info
* moves out.
@ -2282,6 +2283,7 @@ struct net_device {
u8 dev_addr_shadow[MAX_ADDR_LEN];
netdevice_tracker linkwatch_dev_tracker;
netdevice_tracker watchdog_dev_tracker;
};
#define to_net_dev(d) container_of(d, struct net_device, dev)