Hello:
This patch was applied to bpf/bpf.git (master)
by Daniel Borkmann <daniel@xxxxxxxxxxxxx>:
On Tue, 7 Jun 2022 16:22:00 +0200 you wrote:
> Xdpxceiver run on a AF_XDP ZC enabled driver revealed a problem with XSK
> Tx batching API. There is a test that checks how invalid Tx descriptors
> are handled by AF_XDP. Each valid descriptor is followed by invalid one
> on Tx side whereas the Rx side expects only to receive a set of valid
> descriptors.
>
> In current xsk_tx_peek_release_desc_batch() function, the amount of
> available descriptors is hidden inside xskq_cons_peek_desc_batch(). This
> can be problematic in cases where invalid descriptors are present due to
> the fact that xskq_cons_peek_desc_batch() returns only a count of valid
> descriptors. This means that it is impossible to properly update XSK
> ring state when calling xskq_cons_release_n().
>
> [...]
Here is the summary with links:
- [bpf] xsk: Fix handling of invalid descriptors in XSK Tx batching API
https://git.kernel.org/bpf/bpf/c/d678cbd2f867
You are awesome, thank you!
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