net: protect netdev->napi_list with netdev_lock()

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Hold netdev->lock when NAPIs are getting added or removed.
This will allow safe access to NAPI instances of a net_device
without rtnl_lock.

Create a family of helpers which assume the lock is already taken.
Switch iavf to them, as it makes extensive use of netdev->lock,
already.

Reviewed-by: Joe Damato <jdamato@fastly.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Link: https://patch.msgid.link/20250115035319.559603-6-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

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This commit is contained in:

Jakub Kicinski 2025-01-14 19:53:13 -08:00

parent 5112457f3d

commit 1b23cdbd2b

3 changed files with 60 additions and 15 deletions

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6

drivers/net/ethernet/intel/iavf/iavf_main.c

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54

include/linux/netdevice.h

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15

net/core/dev.c

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