netdev - Re: [PATCH bpf-next v2] bpf: libbpf: retry map creation without the name

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Message-ID: <ca3840bd-91a9-0780-975d-75740ceea77f@iogearbox.net>
Date:   Tue, 20 Nov 2018 00:57:49 +0100
From:   Daniel Borkmann <daniel@...earbox.net>
To:     Stanislav Fomichev <sdf@...gle.com>, netdev@...r.kernel.org,
        ast@...nel.org
Cc:     vladum@...gle.com
Subject: Re: [PATCH bpf-next v2] bpf: libbpf: retry map creation without the
 name

On 11/19/2018 11:49 PM, Stanislav Fomichev wrote:
> Since commit 88cda1c9da02 ("bpf: libbpf: Provide basic API support
> to specify BPF obj name"), libbpf unconditionally sets bpf_attr->name
> for maps. Pre v4.14 kernels don't know about map names and return an
> error about unexpected non-zero data. Retry sys_bpf without a map
> name to cover older kernels.
> 
> v2 changes:
> * check for errno == EINVAL as suggested by Daniel Borkmann
> 
> Signed-off-by: Stanislav Fomichev <sdf@...gle.com>

Applied to bpf-next, thanks!