Re: [PATCH AUTOSEL 6.0 17/77] genetlink: hold read cb_lock during iteration of genl_fam_idr in genl_bind()

Jakub Kicinski
2022-10-10T15:49:56Z

On Sun, 9 Oct 2022 18:06:54 -0400 Sasha Levin wrote:
> In genl_bind(), currently genl_lock and write cb_lock are taken
> for iteration of genl_fam_idr and processing of static values
> stored in struct genl_family. Take just read cb_lock for this task
> as it is sufficient to guard the idr and the struct against
> concurrent genl_register/unregister_family() calls.
>
> This will allow to run genl command processing in genl_rcv() and
> mnl_socket_setsockopt(.., NETLINK_ADD_MEMBERSHIP, ..) in parallel.

Not stable material, please drop.