From: Stephen Hemminger <stephen@networkplumber.org>
To: Madhuker Mythri <madhuker.mythri@oracle.com>
Cc: "ferruh.yigit@amd.com" <ferruh.yigit@amd.com>,
"dev@dpdk.org" <dev@dpdk.org>
Subject: Re: [External] : Re: [PATCH] net/tap: Modified TAP BPF program as per the new Kernel-version upgrade requirements.
Date: Fri, 5 Jan 2024 09:39:34 -0800 [thread overview]
Message-ID: <20240105093934.1a0b59a8@hermes.local> (raw)
In-Reply-To: <SJ0PR10MB47984EA42CB2EE6CC326E6DD97662@SJ0PR10MB4798.namprd10.prod.outlook.com>
On Fri, 5 Jan 2024 14:44:00 +0000
Madhuker Mythri <madhuker.mythri@oracle.com> wrote:
> Hi Stephen,
>
> The BPF helper man pages implies in that way and the SKB data pointer access was working till 5.4 kernel also, however from Kernel-5.15 version, we do see eBPF verifier throws error when we use SKB data pointer access.
> So, I had used this helper functions and able to resolve the errors. This is helper functions are safe to use and also protects from any non-linear skb data buffer access also.
>
> So, I think using helper functions is better and safe way to access the SKB data, instead of pointer access.
>
> Thanks,
> Madhuker.
Using the accessors may mean it won't work with older kernels, but that is not
a huge concern given how fragile this code is.
next prev parent reply other threads:[~2024-01-05 17:39 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-01-04 17:27 madhuker.mythri
2024-01-04 20:32 ` Stephen Hemminger
2024-01-05 14:58 ` [External] : " Madhuker Mythri
2024-01-04 20:33 ` Stephen Hemminger
2024-01-04 20:35 ` Stephen Hemminger
2024-01-04 20:38 ` Stephen Hemminger
2024-01-05 14:58 ` [External] : " Madhuker Mythri
2024-01-05 17:40 ` Stephen Hemminger
2024-01-04 20:39 ` Stephen Hemminger
2024-01-04 20:41 ` Stephen Hemminger
2024-01-05 15:11 ` [External] : " Madhuker Mythri
2024-01-05 17:41 ` Stephen Hemminger
2024-01-04 20:42 ` Stephen Hemminger
2024-01-04 20:57 ` Stephen Hemminger
2024-01-05 14:44 ` [External] : " Madhuker Mythri
2024-01-05 17:39 ` Stephen Hemminger [this message]
2024-01-06 5:47 ` Madhuker Mythri
2024-01-05 19:30 ` Stephen Hemminger
2024-01-06 5:36 ` [External] : " Madhuker Mythri
2024-01-06 10:23 ` Madhuker Mythri
2024-01-06 16:54 ` Stephen Hemminger
2024-01-06 18:16 ` Stephen Hemminger
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