From mboxrd@z Thu Jan  1 00:00:00 1970
From: David Miller <davem@davemloft.net>
Subject: Re: [PATCH net-next] tools: bpftool: try to mount bpffs if
 required for pinning objects
Date: Thu, 26 Oct 2017 17:53:33 +0900 (KST)
Message-ID: <20171026.175333.1830367025144925809.davem@davemloft.net>
References: <20171025031128.13990-1-jakub.kicinski@netronome.com>
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Cc: netdev@vger.kernel.org, oss-drivers@netronome.com,
        alexei.starovoitov@gmail.com, daniel@iogearbox.net,
        quentin.monnet@netronome.com
To: jakub.kicinski@netronome.com
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From: Jakub Kicinski <jakub.kicinski@netronome.com>
Date: Tue, 24 Oct 2017 20:11:28 -0700

> From: Quentin Monnet <quentin.monnet@netronome.com>
> 
> One possible cause of failure for `bpftool {prog|map} pin * file FILE`
> is the FILE not being in an eBPF virtual file system (bpffs). In this
> case, make bpftool attempt to mount bpffs on the parent directory of the
> FILE. Then, if this operation is successful, try again to pin the
> object.
> 
> The code for mnt_bpffs() is a copy of function bpf_mnt_fs() from
> iproute2 package (under lib/bpf.c, taken at commit 4b73d52f8a81), with
> modifications regarding handling of error messages.
> 
> Signed-off-by: Quentin Monnet <quentin.monnet@netronome.com>
> Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>

Applied.