Netdev Archive on lore.kernel.org
help / color / mirror / Atom feed
From: Grygorii Strashko <grygorii.strashko@ti.com>
To: Vladimir Oltean <vladimir.oltean@nxp.com>,
	<netdev@vger.kernel.org>, Jakub Kicinski <kuba@kernel.org>,
	"David S. Miller" <davem@davemloft.net>
Cc: Florian Fainelli <f.fainelli@gmail.com>,
	Andrew Lunn <andrew@lunn.ch>,
	Vivien Didelot <vivien.didelot@gmail.com>,
	Jiri Pirko <jiri@resnulli.us>, Ido Schimmel <idosch@idosch.org>,
	Roopa Prabhu <roopa@nvidia.com>,
	Nikolay Aleksandrov <nikolay@nvidia.com>,
	Stephen Hemminger <stephen@networkplumber.org>,
	<bridge@lists.linux-foundation.org>,
	Arnd Bergmann <arnd@kernel.org>
Subject: Re: [PATCH net-next 0/2] Convert switchdev_bridge_port_{,un}offload to notifiers
Date: Tue, 3 Aug 2021 20:11:56 +0300	[thread overview]
Message-ID: <00acb107-8ff6-9c98-e6c3-f6718d5ce9f4@ti.com> (raw)
In-Reply-To: <20210803143624.1135002-1-vladimir.oltean@nxp.com>



On 03/08/2021 17:36, Vladimir Oltean wrote:
> The introduction of the explicit switchdev bridge port offloading API
> has introduced dependency regressions between switchdev drivers and the
> bridge, with some drivers where switchdev support was optional before
> being now compiled as a module when the bridge is a module, or worse.
> 
> This patch makes the switchdev bridge port offload/unoffload events
> visible on the blocking notifier call chain, so that the bridge can
> indirectly do something when those events happen, without the driver
> explicitly calling a symbol exported by the bridge driver.
> 
> Vladimir Oltean (2):
>    net: make switchdev_bridge_port_{,unoffload} loosely coupled with the
>      bridge
>    Revert "net: build all switchdev drivers as modules when the bridge is
>      a module"
> 
>   drivers/net/ethernet/microchip/sparx5/Kconfig |  1 -
>   drivers/net/ethernet/ti/Kconfig               |  2 -
>   drivers/net/ethernet/ti/am65-cpsw-nuss.c      |  2 +-
>   drivers/net/ethernet/ti/cpsw_new.c            |  2 +-
>   include/linux/if_bridge.h                     | 35 -------------
>   include/net/switchdev.h                       | 46 +++++++++++++++++
>   net/bridge/br.c                               | 51 ++++++++++++++++++-
>   net/bridge/br_private.h                       | 30 +++++++++++
>   net/bridge/br_switchdev.c                     | 36 ++++---------
>   net/switchdev/switchdev.c                     | 48 +++++++++++++++++
>   10 files changed, 185 insertions(+), 68 deletions(-)
> 

I've tested builds, but was not able to test bridge itself on TI am57x platform.

1) See warning
[    3.958496] ------------[ cut here ]------------
[    3.963165] WARNING: CPU: 0 PID: 1 at lib/refcount.c:25 fib_create_info+0xae8/0xbd4
[    3.970855] refcount_t: addition on 0; use-after-free.
[    3.976043] Modules linked in: autofs4
[    3.979827] CPU: 0 PID: 1 Comm: systemd Not tainted 5.14.0-rc4-next-20210802-00002-g5003e4ac441d-dirty #5
[    3.989440] Hardware name: Generic DRA72X (Flattened Device Tree)
[    3.995574] [<c0111098>] (unwind_backtrace) from [<c010b834>] (show_stack+0x10/0x14)
[    4.003356] [<c010b834>] (show_stack) from [<c09da808>] (dump_stack_lvl+0x40/0x4c)
[    4.010986] [<c09da808>] (dump_stack_lvl) from [<c0137b44>] (__warn+0xd8/0x100)
[    4.018341] [<c0137b44>] (__warn) from [<c09d6368>] (warn_slowpath_fmt+0x94/0xbc)
[    4.025848] [<c09d6368>] (warn_slowpath_fmt) from [<c08f68d4>] (fib_create_info+0xae8/0xbd4)
[    4.034332] [<c08f68d4>] (fib_create_info) from [<c08f99c4>] (fib_table_insert+0x5c/0x604¢·†AËÕìÍ_¡

2) see warnings and "ip link add name br0 type bridge" just stuck
[  158.032135] unregister_netdevice: waiting for lo to become free. Usage count = 3

It might not be related to this series.


-- 
Best regards,
grygorii

  parent reply	other threads:[~2021-08-03 17:12 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-03 14:36 Vladimir Oltean
2021-08-03 14:36 ` [PATCH net-next 1/2] net: make switchdev_bridge_port_{,unoffload} loosely coupled with the bridge Vladimir Oltean
2021-08-03 19:03   ` kernel test robot
2021-08-03 14:36 ` [PATCH net-next 2/2] Revert "net: build all switchdev drivers as modules when the bridge is a module" Vladimir Oltean
2021-08-03 17:11 ` Grygorii Strashko [this message]
2021-08-03 18:15   ` [PATCH net-next 0/2] Convert switchdev_bridge_port_{,un}offload to notifiers Vladimir Oltean
2021-08-03 19:18     ` Grygorii Strashko
2021-08-03 20:44 ` Vladimir Oltean

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=00acb107-8ff6-9c98-e6c3-f6718d5ce9f4@ti.com \
    --to=grygorii.strashko@ti.com \
    --cc=andrew@lunn.ch \
    --cc=arnd@kernel.org \
    --cc=bridge@lists.linux-foundation.org \
    --cc=davem@davemloft.net \
    --cc=f.fainelli@gmail.com \
    --cc=idosch@idosch.org \
    --cc=jiri@resnulli.us \
    --cc=kuba@kernel.org \
    --cc=netdev@vger.kernel.org \
    --cc=nikolay@nvidia.com \
    --cc=roopa@nvidia.com \
    --cc=stephen@networkplumber.org \
    --cc=vivien.didelot@gmail.com \
    --cc=vladimir.oltean@nxp.com \
    --subject='Re: [PATCH net-next 0/2] Convert switchdev_bridge_port_{,un}offload to notifiers' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).