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{ "id": 1238799, "url": "http://patchwork.ozlabs.org/api/covers/1238799/?format=api", "web_url": "http://patchwork.ozlabs.org/project/netdev/cover/20200216193005.144157-1-jolsa@kernel.org/", "project": { "id": 7, "url": "http://patchwork.ozlabs.org/api/projects/7/?format=api", "name": "Linux network development", "link_name": "netdev", "list_id": "netdev.vger.kernel.org", "list_email": "netdev@vger.kernel.org", "web_url": null, "scm_url": null, "webscm_url": null, "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<20200216193005.144157-1-jolsa@kernel.org>", "list_archive_url": null, "date": "2020-02-16T19:29:47", "name": "[PATCHv2,00/18] bpf: Add trampoline and dispatcher to /proc/kallsyms", "submitter": { "id": 73687, "url": "http://patchwork.ozlabs.org/api/people/73687/?format=api", "name": "Jiri Olsa", "email": "jolsa@kernel.org" }, "mbox": "http://patchwork.ozlabs.org/project/netdev/cover/20200216193005.144157-1-jolsa@kernel.org/mbox/", "series": [ { "id": 158829, "url": "http://patchwork.ozlabs.org/api/series/158829/?format=api", "web_url": "http://patchwork.ozlabs.org/project/netdev/list/?series=158829", "date": "2020-02-16T19:29:47", "name": "bpf: Add trampoline and dispatcher to /proc/kallsyms", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/158829/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/covers/1238799/comments/", "headers": { "Return-Path": "<bpf-owner@vger.kernel.org>", "X-Original-To": "incoming-bpf@patchwork.ozlabs.org", "Delivered-To": "patchwork-incoming-bpf@bilbo.ozlabs.org", "Authentication-Results": [ "ozlabs.org; spf=none (no SPF record)\n\tsmtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67;\n\thelo=vger.kernel.org; envelope-from=bpf-owner@vger.kernel.org;\n\treceiver=<UNKNOWN>)", "ozlabs.org;\n\tdmarc=fail (p=none dis=none) header.from=kernel.org" ], "Received": [ "from vger.kernel.org (vger.kernel.org [209.132.180.67])\n\tby ozlabs.org (Postfix) with ESMTP id 48LHJY4xcBz9sP7\n\tfor <incoming-bpf@patchwork.ozlabs.org>;\n\tMon, 17 Feb 2020 06:30:21 +1100 (AEDT)", "(majordomo@vger.kernel.org) by vger.kernel.org via listexpand\n\tid S1726036AbgBPTaU convert rfc822-to-8bit (ORCPT\n\t<rfc822;incoming-bpf@patchwork.ozlabs.org>);\n\tSun, 16 Feb 2020 14:30:20 -0500", "from us-smtp-delivery-1.mimecast.com ([205.139.110.120]:57490 \"EHLO\n\tus-smtp-1.mimecast.com\" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org\n\twith ESMTP id S1726009AbgBPTaU (ORCPT <rfc822; bpf@vger.kernel.org>); \n\tSun, 16 Feb 2020 14:30:20 -0500", "from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com\n\t[209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id\n\tus-mta-404-sbc_LcmqPi6xP3oI9Hur0Q-1; Sun, 16 Feb 2020 14:30:15 -0500", "from smtp.corp.redhat.com\n\t(int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11])\n\t(using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits))\n\t(No client certificate requested)\n\tby mimecast-mx01.redhat.com (Postfix) with ESMTPS id 74E67107ACC4;\n\tSun, 16 Feb 2020 19:30:13 +0000 (UTC)", "from krava.redhat.com (ovpn-204-28.brq.redhat.com [10.40.204.28])\n\tby smtp.corp.redhat.com (Postfix) with ESMTP id D0DC78574E;\n\tSun, 16 Feb 2020 19:30:06 +0000 (UTC)" ], "From": "Jiri Olsa <jolsa@kernel.org>", "To": "Alexei Starovoitov <ast@kernel.org>,\n\tDaniel Borkmann <daniel@iogearbox.net>", "Cc": "netdev@vger.kernel.org, bpf@vger.kernel.org, Andrii Nakryiko\n\t<andriin@fb.com>, Yonghong Song <yhs@fb.com>, Song Liu\n\t<songliubraving@fb.com>, Martin KaFai Lau <kafai@fb.com>,\n\tJakub Kicinski <kuba@kernel.org>, David Miller <davem@redhat.com>,\n\t=?utf-8?b?QmrDtnJuIFTDtnBlbA==?= <bjorn.topel@intel.com>,\n\tJohn Fastabend <john.fastabend@gmail.com>, Jesper Dangaard Brouer\n\t<hawk@kernel.org>, Arnaldo Carvalho de Melo <acme@redhat.com>", "Subject": "[PATCHv2 00/18] bpf: Add trampoline and dispatcher to /proc/kallsyms", "Date": "Sun, 16 Feb 2020 20:29:47 +0100", "Message-Id": "<20200216193005.144157-1-jolsa@kernel.org>", "MIME-Version": "1.0", "X-Scanned-By": "MIMEDefang 2.79 on 10.5.11.11", "X-MC-Unique": "sbc_LcmqPi6xP3oI9Hur0Q-1", "X-Mimecast-Spam-Score": "0", "X-Mimecast-Originator": "kernel.org", "Content-Type": "text/plain; charset=UTF-8", "Content-Transfer-Encoding": "8BIT", "Sender": "bpf-owner@vger.kernel.org", "Precedence": "bulk", "List-ID": "<bpf.vger.kernel.org>", "X-Mailing-List": "bpf@vger.kernel.org" }, "content": "hi,\nthis patchset adds trampoline and dispatcher objects\nto be visible in /proc/kallsyms. The last patch also\nadds sorting for all bpf objects in /proc/kallsyms.\n\n $ sudo cat /proc/kallsyms | tail -20\n ...\n ffffffffa050f000 t bpf_prog_5a2b06eab81b8f51 [bpf]\n ffffffffa0511000 t bpf_prog_6deef7357e7b4530 [bpf]\n ffffffffa0542000 t bpf_trampoline_13832 [bpf]\n ffffffffa0548000 t bpf_prog_96f1b5bf4e4cc6dc_mutex_lock [bpf]\n ffffffffa0572000 t bpf_prog_d1c63e29ad82c4ab_bpf_prog1 [bpf]\n ffffffffa0585000 t bpf_prog_e314084d332a5338__dissect [bpf]\n ffffffffa0587000 t bpf_prog_59785a79eac7e5d2_mutex_unlock [bpf]\n ffffffffa0589000 t bpf_prog_d0db6e0cac050163_mutex_lock [bpf]\n ffffffffa058d000 t bpf_prog_d8f047721e4d8321_bpf_prog2 [bpf]\n ffffffffa05df000 t bpf_trampoline_25637 [bpf]\n ffffffffa05e3000 t bpf_prog_d8f047721e4d8321_bpf_prog2 [bpf]\n ffffffffa05e5000 t bpf_prog_3b185187f1855c4c [bpf]\n ffffffffa05e7000 t bpf_prog_d8f047721e4d8321_bpf_prog2 [bpf]\n ffffffffa05eb000 t bpf_prog_93cebb259dd5c4b2_do_sys_open [bpf]\n ffffffffa0677000 t bpf_dispatcher_xdp [bpf]\n\nv2 changes:\n - omit extra condition in __bpf_ksym_add for sorting code (Andrii)\n - rename bpf_kallsyms_tree_ops to bpf_ksym_tree (Andrii)\n - expose only executable code in kallsyms (Andrii)\n - use full trampoline key as its kallsyms id (Andrii)\n - explained the BPF_TRAMP_REPLACE case (Andrii)\n - small format changes in bpf_trampoline_link_prog/bpf_trampoline_unlink_prog (Andrii)\n - propagate error value in bpf_dispatcher_update and update kallsym if it's successful (Andrii)\n - get rid of __always_inline for bpf_ksym_tree callbacks (Andrii)\n - added KSYMBOL notification for bpf_image add/removal\n - added perf tools changes to properly display trampoline/dispatcher\n\n\nFor perf tool to properly display trampoline/dispatcher you need\nalso Arnaldo's perf/urgent branch changes. I merged everything\ninto following branch:\n\n git://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git bpf/kallsyms\n\nthanks,\njirka\n\n\n---\nBjörn Töpel (1):\n bpf: Add bpf_trampoline_ name prefix for DECLARE_BPF_DISPATCHER\n\nJiri Olsa (17):\n x86/mm: Rename is_kernel_text to __is_kernel_text\n bpf: Add struct bpf_ksym\n bpf: Add name to struct bpf_ksym\n bpf: Add lnode list node to struct bpf_ksym\n bpf: Add bpf_ksym_tree tree\n bpf: Move bpf_tree add/del from bpf_prog_ksym_node_add/del\n bpf: Separate kallsyms add/del functions\n bpf: Add bpf_ksym_add/del functions\n bpf: Re-initialize lnode in bpf_ksym_del\n bpf: Rename bpf_tree to bpf_progs_tree\n bpf: Add trampolines to kallsyms\n bpf: Return error value in bpf_dispatcher_update\n bpf: Add dispatchers to kallsyms\n bpf: Sort bpf kallsyms symbols\n perf tools: Synthesize bpf_trampoline/dispatcher ksymbol event\n perf tools: Set ksymbol dso as loaded on arrival\n perf annotate: Add base support for bpf_image\n\n arch/x86/mm/init_32.c | 14 ++++++----\n include/linux/bpf.h | 55 ++++++++++++++++++++++++++------------\n include/linux/filter.h | 13 +++------\n kernel/bpf/core.c | 180 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++-------------------------------\n kernel/bpf/dispatcher.c | 19 +++++++++----\n kernel/bpf/trampoline.c | 38 +++++++++++++++++++++++++-\n kernel/events/core.c | 9 +++----\n net/core/filter.c | 5 ++--\n tools/perf/util/annotate.c | 20 ++++++++++++++\n tools/perf/util/bpf-event.c | 98 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++\n tools/perf/util/dso.c | 1 +\n tools/perf/util/dso.h | 1 +\n tools/perf/util/machine.c | 12 +++++++++\n tools/perf/util/symbol.c | 1 +\n 14 files changed, 375 insertions(+), 91 deletions(-)" }