From: Andy Lutomirski <luto-kltTT9wpgjJwATOyAt5JVQ@public.gmane.org>
To: Alexei Starovoitov <ast-uqk4Ao+rVK5Wk0Htik3J/w@public.gmane.org>
Cc: "David S. Miller" <davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org>,
Ingo Molnar <mingo-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
Steven Rostedt <rostedt-nx8X9YLhiw1AfugRpC6u6w@public.gmane.org>,
Wang Nan <wangnan0-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>,
Li Zefan <lizefan-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>,
Daniel Wagner
<daniel.wagner-98C5kh4wR6ohFhg+JK9F0w@public.gmane.org>,
Daniel Borkmann <daniel-FeC+5ew28dpmcu3hnIyYJQ@public.gmane.org>,
Linux API <linux-api-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
Network Development
<netdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
"linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>
Subject: Re: [PATCH net-next 1/3] bpf: introduce current->pid, tgid, uid, gid, comm accessors
Date: Fri, 12 Jun 2015 15:08:58 -0700 [thread overview]
Message-ID: <CALCETrUidQ9ig-xZrAFX8_==aVbDNKU-GfeYNMsT6uHugqSydg@mail.gmail.com> (raw)
In-Reply-To: <1434145226-17892-2-git-send-email-ast-uqk4Ao+rVK5Wk0Htik3J/w@public.gmane.org>
On Fri, Jun 12, 2015 at 2:40 PM, Alexei Starovoitov <ast-uqk4Ao+rVK5Wk0Htik3J/w@public.gmane.org> wrote:
> eBPF programs attached to kprobes need to filter based on
> current->pid, uid and other fields, so introduce helper functions:
>
> u64 bpf_get_current_pid_tgid(void)
> Return: current->tgid << 32 | current->pid
>
> u64 bpf_get_current_uid_gid(void)
> Return: current_gid << 32 | current_uid
How does this work wrt namespaces, and why the weird packing?
--Andy
next prev parent reply other threads:[~2015-06-12 22:08 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-06-12 21:40 [PATCH net-next 0/3] bpf: share helpers between tracing and networking Alexei Starovoitov
[not found] ` <1434145226-17892-1-git-send-email-ast-uqk4Ao+rVK5Wk0Htik3J/w@public.gmane.org>
2015-06-12 21:40 ` [PATCH net-next 1/3] bpf: introduce current->pid, tgid, uid, gid, comm accessors Alexei Starovoitov
[not found] ` <1434145226-17892-2-git-send-email-ast-uqk4Ao+rVK5Wk0Htik3J/w@public.gmane.org>
2015-06-12 22:08 ` Andy Lutomirski [this message]
2015-06-12 22:44 ` Alexei Starovoitov
2015-06-12 22:54 ` Andy Lutomirski
2015-06-12 23:23 ` Alexei Starovoitov
2015-06-12 23:25 ` Andy Lutomirski
2015-06-12 23:38 ` Alexei Starovoitov
2015-06-12 23:47 ` Andy Lutomirski
2015-06-12 23:55 ` Alexei Starovoitov
2015-06-13 0:03 ` Andy Lutomirski
[not found] ` <CALCETrWYHkBtVr5D0zdrXswoH2gSXsxhtD23w6J7EP=HEwPt8A-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-06-13 0:15 ` Alexei Starovoitov
2015-06-13 0:24 ` Andy Lutomirski
[not found] ` <CALCETrWUuoZz2XOox5FJJPAfFdBakLnY1d7LLP5Uxq9tqgkpzg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-06-13 0:26 ` Alexei Starovoitov
2015-06-12 21:40 ` [PATCH net-next 2/3] bpf: allow networking programs to use bpf_trace_printk() for debugging Alexei Starovoitov
2015-06-12 21:40 ` [PATCH net-next 3/3] bpf: let kprobe programs use bpf_get_smp_processor_id() helper Alexei Starovoitov
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