From: Jakub Kicinski <kuba@kernel.org>
To: renmingshuai <renmingshuai@huawei.com>
Cc: <davem@davemloft.net>, <edumazet@google.com>, <pabeni@redhat.com>,
<idosch@nvidia.com>, <netdev@vger.kernel.org>, <yanan@huawei.com>,
<chenzhen126@huawei.com>, <liaichun@huawei.com>
Subject: Re: [PATCH] net/netlink: how to deal with the problem of exceeding the maximum reach of nlattr's nla_len
Date: Thu, 21 Mar 2024 07:30:45 -0700 [thread overview]
Message-ID: <20240321073045.3ee6127d@kernel.org> (raw)
In-Reply-To: <20240321141400.38639-1-renmingshuai@huawei.com>
On Thu, 21 Mar 2024 22:14:00 +0800 renmingshuai wrote:
> RTM_GETLINK for greater than about 220 VFs truncates IFLA_VFINFO_LIST
> due to the maximum reach of nlattr's nla_len being exceeded. As a result,
> the value of nla_len overflows in nla_nest_end(). According to [1],
> changing the type of nla_len is not possible, but how can we deal with this
> overflow problem? The nla_len is constantly set to the
> maximum value when it overflows? Or some better ways?
It's a known limitation of the legacy SRIOV VF API.
Use switchdev mode instead, please.
prev parent reply other threads:[~2024-03-21 14:30 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-03-21 14:14 [PATCH] net/netlink: how to deal with the problem of exceeding the maximum reach of nlattr's nla_len renmingshuai
2024-03-21 14:30 ` Jakub Kicinski [this message]
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