* RE: [PATCH bpf-next v5 1/2] bpf: Extend batch operations for map-in-map bpf-maps
[not found] <20220506010049.1980482-1-ctakshak@fb.com>
@ 2022-05-09 3:23 ` John Fastabend
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From: John Fastabend @ 2022-05-09 3:23 UTC (permalink / raw)
To: Takshak Chahande, netdev, bpf
Cc: andrii, ast, ctakshak, ndixit, kafai, andriin, daniel, yhs,
ctakshak
Takshak Chahande wrote:
> This patch extends batch operations support for map-in-map map-types:
> BPF_MAP_TYPE_HASH_OF_MAPS and BPF_MAP_TYPE_ARRAY_OF_MAPS
>
> A usecase where outer HASH map holds hundred of VIP entries and its
> associated reuse-ports per VIP stored in REUSEPORT_SOCKARRAY type
> inner map, needs to do batch operation for performance gain.
>
> This patch leverages the exiting generic functions for most of the batch
> operations. As map-in-map's value contains the actual reference of the inner map,
> for BPF_MAP_TYPE_HASH_OF_MAPS type, it needed an extra step to fetch the
> map_id from the reference value.
>
> selftests are added in next patch 2/2.
>
> Signed-off-by: Takshak Chahande <ctakshak@fb.com>
> Acked-by: Yonghong Song <yhs@fb.com>
> ---
Acked-by: John Fastabend <john.fastabend@gmail.com>
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