From: Stanislav Fomichev <sdf@fomichev.me>
To: Martin Lau <kafai@fb.com>
Cc: Stanislav Fomichev <sdf@google.com>,
"netdev@vger.kernel.org" <netdev@vger.kernel.org>,
"bpf@vger.kernel.org" <bpf@vger.kernel.org>,
"davem@davemloft.net" <davem@davemloft.net>,
"ast@kernel.org" <ast@kernel.org>,
"daniel@iogearbox.net" <daniel@iogearbox.net>
Subject: Re: [PATCH bpf-next 3/3] bpftool: print the comm of the process that loaded the program
Date: Fri, 11 Oct 2019 13:37:16 -0700 [thread overview]
Message-ID: <20191011203716.GI2096@mini-arch> (raw)
In-Reply-To: <20191011201910.ynztujumh7dlluez@kafai-mbp.dhcp.thefacebook.com>
On 10/11, Martin Lau wrote:
> On Fri, Oct 11, 2019 at 09:21:24AM -0700, Stanislav Fomichev wrote:
> > Print recently added created_by_comm along the existing created_by_uid.
> >
> > Example with loop1.o (loaded via bpftool):
> > 4: raw_tracepoint name nested_loops tag b9472b3ff5753ef2 gpl
> > loaded_at 2019-10-10T13:38:18-0700 uid 0 comm bpftool
> > xlated 264B jited 152B memlock 4096B
> > btf_id 3
> Hopefully CAP_BPF may avoid uid 0 in the future.
Yeah, but this also requires creating a user with CAP_BPF and running
a daemon under this user.
> What will be in "comm" for the python bcc script?
I guess it will be "python". But at least you get a signal that it's
not some other system daemon :-)
> >
> > Signed-off-by: Stanislav Fomichev <sdf@google.com>
> > ---
> > tools/bpf/bpftool/prog.c | 4 +++-
> > 1 file changed, 3 insertions(+), 1 deletion(-)
> >
> > diff --git a/tools/bpf/bpftool/prog.c b/tools/bpf/bpftool/prog.c
> > index 27da96a797ab..400771a942d7 100644
> > --- a/tools/bpf/bpftool/prog.c
> > +++ b/tools/bpf/bpftool/prog.c
> > @@ -296,7 +296,9 @@ static void print_prog_plain(struct bpf_prog_info *info, int fd)
> > print_boot_time(info->load_time, buf, sizeof(buf));
> >
> > /* Piggy back on load_time, since 0 uid is a valid one */
> > - printf("\tloaded_at %s uid %u\n", buf, info->created_by_uid);
> > + printf("\tloaded_at %s uid %u comm %s\n", buf,
> > + info->created_by_uid,
> > + info->created_by_comm);
> > }
> >
> > printf("\txlated %uB", info->xlated_prog_len);
> > --
> > 2.23.0.700.g56cf767bdb-goog
> >
next prev parent reply other threads:[~2019-10-11 20:37 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-11 16:21 [PATCH bpf-next 1/3] bpf: preserve command of the process that loaded the program Stanislav Fomichev
2019-10-11 16:21 ` [PATCH bpf-next 2/3] tools/bpf: sync bpf.h Stanislav Fomichev
2019-10-11 16:21 ` [PATCH bpf-next 3/3] bpftool: print the comm of the process that loaded the program Stanislav Fomichev
2019-10-11 20:19 ` Martin Lau
2019-10-11 20:37 ` Stanislav Fomichev [this message]
2019-10-11 21:11 ` Arnaldo Carvalho de Melo
2019-10-11 21:30 ` Stanislav Fomichev
2019-10-12 0:10 ` [PATCH bpf-next 1/3] bpf: preserve command " Alexei Starovoitov
2019-10-12 0:38 ` Stanislav Fomichev
2019-10-15 21:21 ` debug annotations for bpf progs. Was: " Alexei Starovoitov
2019-10-15 22:14 ` Andrii Nakryiko
2019-10-15 22:24 ` Alexei Starovoitov
2019-10-15 22:33 ` Andrii Nakryiko
2019-10-15 22:48 ` Alexei Starovoitov
2019-10-15 22:26 ` Stanislav Fomichev
2019-10-16 14:01 ` Daniel Borkmann
2019-10-17 16:28 ` Stanislav Fomichev
2019-10-18 6:19 ` Alexei Starovoitov
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