netdev - Re: [PATCH 1/1] samples: bpf: fix the compiling error

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Message-ID: <CAD=hENdVrb18vxnUrSZvgMnFo5EoJAJdSKSm4Q2kFLHHSoUbpQ@mail.gmail.com>
Date:   Thu, 6 May 2021 21:51:44 +0800
From:   Zhu Yanjun <zyjzyj2000@...il.com>
To:     Magnus Karlsson <magnus.karlsson@...il.com>
Cc:     Zhu Yanjun <yanjun.zhu@...el.com>,
        Mariusz Dudek <mariuszx.dudek@...el.com>,
        Network Development <netdev@...r.kernel.org>,
        Björn Töpel <bjorn@...nel.org>,
        "Karlsson, Magnus" <magnus.karlsson@...el.com>,
        Jonathan Lemon <jonathan.lemon@...il.com>
Subject: Re: [PATCH 1/1] samples: bpf: fix the compiling error

On Thu, May 6, 2021 at 8:54 PM Magnus Karlsson
<magnus.karlsson@...il.com> wrote:
>
> On Thu, May 6, 2021 at 8:47 AM Zhu Yanjun <yanjun.zhu@...el.com> wrote:
> >
> > From: Zhu Yanjun <zyjzyj2000@...il.com>
> >
> > When compiling, the following error will appear.
> >
> > "
> > samples/bpf//xdpsock_user.c:27:10: fatal error: sys/capability.h:
> >  No such file or directory
> > "
>
> On my system, I get a compilation error if I include
> linux/capability.h as it does not have capget().

Thanks. Can you run "rpm -qf /xxx/xxx/sys/capability.h" to check which
software provides sys/capability.h?
Now I am on CentOS Linux release 8.3.2011.

Thanks a lot.
Zhu Yanjun


>
> NAME
>        capget, capset - set/get capabilities of thread(s)
>
> SYNOPSIS
>        #include <sys/capability.h>
>
>        int capget(cap_user_header_t hdrp, cap_user_data_t datap);
>
> Have you installed libcap? It contains the sys/capability.h header
> file that you need.
>
> > Now capability.h is in linux directory.
> >
> > Fixes: 3627d9702d78 ("samples/bpf: Sample application for eBPF load and socket creation split")
> > Signed-off-by: Zhu Yanjun <zyjzyj2000@...il.com>
> > ---
> >  samples/bpf/xdpsock_user.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/samples/bpf/xdpsock_user.c b/samples/bpf/xdpsock_user.c
> > index aa696854be78..44200aa694cb 100644
> > --- a/samples/bpf/xdpsock_user.c
> > +++ b/samples/bpf/xdpsock_user.c
> > @@ -24,7 +24,7 @@
> >  #include <stdio.h>
> >  #include <stdlib.h>
> >  #include <string.h>
> > -#include <sys/capability.h>
> > +#include <linux/capability.h>
> >  #include <sys/mman.h>
> >  #include <sys/resource.h>
> >  #include <sys/socket.h>
> > --
> > 2.27.0
> >