From: Jakub Kicinski <kuba@kernel•org>
To: Jacob Keller <jacob.e.keller@intel•com>
Cc: <davem@davemloft•net>, <netdev@vger•kernel.org>,
<edumazet@google•com>, <pabeni@redhat•com>,
<andrew+netdev@lunn•ch>, <horms@kernel•org>, <sdf@fomichev•me>,
<hramamurthy@google•com>, <kuniyu@amazon•com>,
<jdamato@fastly•com>
Subject: Re: [PATCH net-next v2 7/8] docs: netdev: break down the instance locking info per ops struct
Date: Thu, 10 Apr 2025 09:08:02 -0700 [thread overview]
Message-ID: <20250410090802.37207b61@kernel.org> (raw)
In-Reply-To: <119bf05d-17c6-4327-a79b-31e3e2838abe@intel.com>
On Wed, 9 Apr 2025 23:01:18 -0700 Jacob Keller wrote:
> > +All queue management callbacks are invoked while holding the netdev instance
> > +lock. ``rtnl_lock`` may or may not be held.
> > +
> > +Note that supporting struct netdev_queue_mgmt_ops automatically enables
> > +"ops locking".
> > +
>
> Does this mean we don't allow drivers which support
> netdev_queue_mgmt_ops but don't set request_ops_lock? Or does it mean
> that supporting netdev_queue_mgmt_ops and/or netdev shapers
> automatically implies request_ops_lock? Or is there some other
> behavioral difference?
>
> From the wording this sounds like its enforced via code, and it seems
> reasonable to me that we wouldn't allow these without setting
> request_ops_lock to true...
"request" is for drivers to optionally request.
If the driver supports queue or shaper APIs it doesn't have a say.
next prev parent reply other threads:[~2025-04-10 16:08 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-04-08 19:59 [PATCH net-next v2 0/8] net: depend on instance lock for queue related netlink ops Jakub Kicinski
2025-04-08 19:59 ` [PATCH net-next v2 1/8] net: avoid potential race between netdev_get_by_index_lock() and netns switch Jakub Kicinski
2025-04-08 19:59 ` [PATCH net-next v2 2/8] net: designate XSK pool pointers in queues as "ops protected" Jakub Kicinski
2025-04-08 19:59 ` [PATCH net-next v2 3/8] netdev: add "ops compat locking" helpers Jakub Kicinski
2025-04-08 19:59 ` [PATCH net-next v2 4/8] netdev: don't hold rtnl_lock over nl queue info get when possible Jakub Kicinski
2025-04-08 19:59 ` [PATCH net-next v2 5/8] xdp: double protect netdev->xdp_flags with netdev->lock Jakub Kicinski
2025-04-08 22:15 ` Harshitha Ramamurthy
2025-04-09 18:40 ` Martin KaFai Lau
2025-04-08 19:59 ` [PATCH net-next v2 6/8] netdev: depend on netdev->lock for xdp features Jakub Kicinski
2025-04-10 17:10 ` Kuniyuki Iwashima
2025-04-11 2:10 ` Jakub Kicinski
2025-04-11 2:23 ` Jakub Kicinski
2025-04-11 17:41 ` Stanislav Fomichev
2025-04-11 19:19 ` Jakub Kicinski
2025-04-11 2:36 ` Kuniyuki Iwashima
2025-04-08 19:59 ` [PATCH net-next v2 7/8] docs: netdev: break down the instance locking info per ops struct Jakub Kicinski
2025-04-09 2:59 ` Joe Damato
2025-04-10 6:01 ` Jacob Keller
2025-04-10 16:08 ` Jakub Kicinski [this message]
2025-04-10 22:35 ` Keller, Jacob E
2025-04-10 23:39 ` Jakub Kicinski
2025-04-11 21:26 ` Jacob Keller
2025-04-08 19:59 ` [PATCH net-next v2 8/8] netdev: depend on netdev->lock for qstats in ops locked drivers Jakub Kicinski
2025-04-10 5:23 ` Jacob Keller
2025-04-10 23:46 ` Jakub Kicinski
2025-04-11 21:29 ` Jacob Keller
2025-04-10 0:40 ` [PATCH net-next v2 0/8] net: depend on instance lock for queue related netlink ops patchwork-bot+netdevbpf
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