netdev - [PATCH 00/14] bpf: Add trampoline and dispatcher to /proc/kallsyms

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Message-Id: <20200208154209.1797988-1-jolsa@kernel.org>
Date:   Sat,  8 Feb 2020 16:41:55 +0100
From:   Jiri Olsa <jolsa@...nel.org>
To:     Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>
Cc:     netdev@...r.kernel.org, bpf@...r.kernel.org,
        Andrii Nakryiko <andriin@...com>, Yonghong Song <yhs@...com>,
        Song Liu <songliubraving@...com>,
        Martin KaFai Lau <kafai@...com>,
        Jakub Kicinski <kuba@...nel.org>,
        David Miller <davem@...hat.com>,
        Björn Töpel <bjorn.topel@...el.com>,
        John Fastabend <john.fastabend@...il.com>,
        Jesper Dangaard Brouer <hawk@...nel.org>
Subject: [PATCH 00/14] bpf: Add trampoline and dispatcher to /proc/kallsyms

hi,
this patchset adds trampoline and dispatcher objects
to be visible in /proc/kallsyms. The last patch also
adds sorting for all bpf objects in /proc/kallsyms.

  $ sudo cat /proc/kallsyms | tail -20
  ...
  ffffffffa050f000 t bpf_prog_5a2b06eab81b8f51    [bpf]
  ffffffffa0511000 t bpf_prog_6deef7357e7b4530    [bpf]
  ffffffffa0542000 t bpf_trampoline_13832 [bpf]
  ffffffffa0548000 t bpf_prog_96f1b5bf4e4cc6dc_mutex_lock [bpf]
  ffffffffa0572000 t bpf_prog_d1c63e29ad82c4ab_bpf_prog1  [bpf]
  ffffffffa0585000 t bpf_prog_e314084d332a5338__dissect   [bpf]
  ffffffffa0587000 t bpf_prog_59785a79eac7e5d2_mutex_unlock       [bpf]
  ffffffffa0589000 t bpf_prog_d0db6e0cac050163_mutex_lock [bpf]
  ffffffffa058d000 t bpf_prog_d8f047721e4d8321_bpf_prog2  [bpf]
  ffffffffa05df000 t bpf_trampoline_25637 [bpf]
  ffffffffa05e3000 t bpf_prog_d8f047721e4d8321_bpf_prog2  [bpf]
  ffffffffa05e5000 t bpf_prog_3b185187f1855c4c    [bpf]
  ffffffffa05e7000 t bpf_prog_d8f047721e4d8321_bpf_prog2  [bpf]
  ffffffffa05eb000 t bpf_prog_93cebb259dd5c4b2_do_sys_open        [bpf]
  ffffffffa0677000 t bpf_dispatcher_xdp   [bpf]

thanks,
jirka

---
Björn Töpel (1):
      bpf: Add bpf_trampoline_ name prefix for DECLARE_BPF_DISPATCHER

Jiri Olsa (13):
      x86/mm: Rename is_kernel_text to __is_kernel_text
      bpf: Add struct bpf_ksym
      bpf: Add name to struct bpf_ksym
      bpf: Add lnode list node to struct bpf_ksym
      bpf: Add bpf_kallsyms_tree tree
      bpf: Move bpf_tree add/del from bpf_prog_ksym_node_add/del
      bpf: Separate kallsyms add/del functions
      bpf: Add bpf_ksym_add/del functions
      bpf: Re-initialize lnode in bpf_ksym_del
      bpf: Rename bpf_tree to bpf_progs_tree
      bpf: Add trampolines to kallsyms
      bpf: Add dispatchers to kallsyms
      bpf: Sort bpf kallsyms symbols

 arch/x86/mm/init_32.c   |  14 ++++++----
 include/linux/bpf.h     |  54 ++++++++++++++++++++++++++------------
 include/linux/filter.h  |  13 +++-------
 kernel/bpf/core.c       | 182 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++--------------------------------
 kernel/bpf/dispatcher.c |   6 +++++
 kernel/bpf/trampoline.c |  23 ++++++++++++++++
 kernel/events/core.c    |   4 +--
 net/core/filter.c       |   5 ++--
 8 files changed, 219 insertions(+), 82 deletions(-)