From patchwork Tue Jun 18 14:39:45 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Slavomir Kaslev X-Patchwork-Id: 11001867 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 915F814BB for ; Tue, 18 Jun 2019 14:40:10 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 80E122847D for ; Tue, 18 Jun 2019 14:40:10 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 7115928470; Tue, 18 Jun 2019 14:40:10 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FROM,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E981B28470 for ; Tue, 18 Jun 2019 14:40:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729038AbfFROkJ (ORCPT ); Tue, 18 Jun 2019 10:40:09 -0400 Received: from mail-wm1-f51.google.com ([209.85.128.51]:54507 "EHLO mail-wm1-f51.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725919AbfFROkJ (ORCPT ); Tue, 18 Jun 2019 10:40:09 -0400 Received: by mail-wm1-f51.google.com with SMTP id g135so3579986wme.4 for ; Tue, 18 Jun 2019 07:40:07 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=cVr6VhA1spYLniuDKsUkVVAiQwMfG3SFwQb76EFECLk=; b=fyCUdPFQ9FpDzvhj4YuXSYnGVUwbHfBHF9nGjFR7JlmRXRKSAHfhBPKWOSxHsFMAUL w/9WGOaO1YlZft6ebe9hMUwG7/udcyYcBWaIdE3BJn7AhRdgTOiNkWxTeo1bRDMAwynz +fltclxV2ZpwakPhCv1oUHt2mKTEiOj9mvQOWNNzruMlgJZLrc1FhD998C9oB5+MnAy8 KSfMcmutuTzdFAlPIa3p/7/7HOPX9Tc71V29cnFLIYlhYvLCv2Ep4ENRmuLwGN21mWGY lc0nFRwJMyaV1KqX1dzNIqD/sGeBo0DUD/fGSA7l4wv/9x9+kjZJSnMyGVPYEsftNhAw wQ2w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=cVr6VhA1spYLniuDKsUkVVAiQwMfG3SFwQb76EFECLk=; b=cA7kmFNOjB+bmJmnWIN7l+A7g7C8niI8SmE20FnJrs1o/TdUyQweka7p3pHMEAGBYE sgGrTzu3M8baZiSBvl7D0CVwOrWZEyR+eB7eVoIaX+trJ8rptqoJ2z6/qggZdffrC0wx 9z9+gQ7+cN3K1U3P4zEp15rjltiYMVgWK/hCLeOLAldMR9dgCZ04Bo54IE2FtbwEoiT0 4cKv8d96rl96MCRkAhaJmr7s7f0eXT7eZ+0tQfYNQALUVCqTc/caV1Sj+4T2I5dgAU3J VFBlaqY9KliO02eli94FIgdVKLU8aY34O8sKJa4zH2SbVpkaBFmKNsB75Bk3tk8L+IxX Efqw== X-Gm-Message-State: APjAAAXJzR6derc7zYP9Zl2kluwyVELLQkuY/D8CVa8SpJtRI0uwr47/ mnLeJ9R4S80z+yGmjtQLA+1DaRY= X-Google-Smtp-Source: APXvYqxljLM7T5gUzB1ypXsGAD0Q8T+ka5vUKw3UR+mfUYdiTf0+hNcq3dffYT2uFG/9A0kDhxOw2A== X-Received: by 2002:a1c:1947:: with SMTP id 68mr3846000wmz.165.1560868806831; Tue, 18 Jun 2019 07:40:06 -0700 (PDT) Received: from box.eng.vmware.com ([146.247.46.5]) by smtp.gmail.com with ESMTPSA id y1sm2411808wma.32.2019.06.18.07.40.05 (version=TLS1_3 cipher=AEAD-AES256-GCM-SHA384 bits=256/256); Tue, 18 Jun 2019 07:40:05 -0700 (PDT) From: "Slavomir Kaslev (VMware)" To: rostedt@goodmis.org Cc: linux-trace-devel@vger.kernel.org Subject: [PATCH v11 00/13] Add VM kernel tracing over vsockets and FIFOs Date: Tue, 18 Jun 2019 17:39:45 +0300 Message-Id: <20190618143958.2865-1-slavomir.kaslev@gmail.com> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 Sender: linux-trace-devel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-trace-devel@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This patchset adds support for tracing guest kernels to trace-cmd. Changes in v11: - fix flushing tracing data bug when doing VM recording Changes in v10: - add support for specifying VMware Workstation guests by name on the command line - add docstring for tracecmd_create_recorder_virt() - add a comment on why we need to poll() in direct_splice_data() Changes in v9: - none Changes in v8: - switched protocol message encoding of ports to text - switched ports data type to unsigned since vsockets port numbers can overflow int and be confused with errors codes by other code - added automatic naming for guests with no names (for VMware Workstation guests currently) - added --debug option to trace-cmd agent Changes in v7: - fixed potential memory leak in add_arg() - call msg_free() in tracecmd_msg_recv_trace_req() eventhough we're stealing the message buffer - added is_guest and is_agent macros and use throughout tracecmd_record.c instead of testing instance->flags bits - avoid memory allocation in make_dir() Changes in v6: - added specialized data transfer path over FIFOs making single splice() per iteration - made tracecmd_msg_recv_trace_req/tracecmd_msg_recv_trace_resp more defensive to invalid messages Changes in v5: - add FIFOs transport for tracing data - fixed a bug in tracecmd_msg_wait_close Changes in v4: - detect and use splice(2) on vsock sockets if possible - switch port numbers to unsigned int - trace-cmd record --date flag is now set for all guests if provided by the user - removed grow_cap and exponential buffer size growth Changes in v3: - addressed Steven's feedback - detect and disable guest tracing if is not available - the --date flag is now treated as global for all guest instances - fixed a bug that caused --date to be ignored for host tracing data when tracing guests Changes in v2: - rebased on top of protocol V3 - fixed system clock timestamps with the --date flag Slavomir Kaslev (11): trace-cmd: Make ports unsigned int trace-cmd: Add tracecmd_create_recorder_virt() function trace-cmd: Add VM tracing protocol messages trace-cmd: Add buffer instance flags for tracing in guest and agent context trace-cmd: Add VM kernel tracing over vsockets transport trace-cmd: Use splice(2) for vsockets if available trace-cmd: Add `trace-cmd setup-guest` command trace-cmd: Try to autodetect number of guest CPUs in setup-guest if not specified trace-cmd: Add setup-guest flag for attaching FIFOs to the guest VM config trace-cmd: Add splice() recording from FIFO without additional pipe buffer trace-cmd: Add support for tracing VMware Workstation VMs by name Slavomir Kaslev (VMware) (1): trace-cmd: Switch stop recording signal to SIGUSR1 Steven Rostedt (VMware) (1): trace-cmd: Detect if vsockets are available Makefile | 7 + include/trace-cmd/trace-cmd.h | 20 +- lib/trace-cmd/trace-recorder.c | 154 ++++-- tracecmd/Makefile | 5 + tracecmd/include/trace-local.h | 29 ++ tracecmd/trace-agent.c | 294 +++++++++++ tracecmd/trace-cmd.c | 4 + tracecmd/trace-listen.c | 10 +- tracecmd/trace-msg.c | 274 ++++++++++- tracecmd/trace-record.c | 865 +++++++++++++++++++++++++++++++-- tracecmd/trace-setup-guest.c | 247 ++++++++++ tracecmd/trace-usage.c | 22 +- 12 files changed, 1824 insertions(+), 107 deletions(-) create mode 100644 tracecmd/trace-agent.c create mode 100644 tracecmd/trace-setup-guest.c