From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.6 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0E2F6C432C0 for ; Tue, 3 Dec 2019 10:35:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id CB4CD2080F for ; Tue, 3 Dec 2019 10:35:39 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="KIBN0+kj" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726138AbfLCKfj (ORCPT ); Tue, 3 Dec 2019 05:35:39 -0500 Received: from mail-lj1-f193.google.com ([209.85.208.193]:34107 "EHLO mail-lj1-f193.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726098AbfLCKfj (ORCPT ); Tue, 3 Dec 2019 05:35:39 -0500 Received: by mail-lj1-f193.google.com with SMTP id m6so3218797ljc.1 for ; Tue, 03 Dec 2019 02:35:36 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=Irh037ZGGW4R8h8ErESe2jql4GwDXX/8LCDplJHfmvE=; b=KIBN0+kjRoqBdRn6ae5hfvnL4l/Koabn8iuaTGkg0Y6Ubhb/LyKG4Ihv1oEzIK1/zB uvpOiZnVnMjOoaTIZ2t9PR1znQzxiTvJR/MkUGg8KHrXERSAHIs4LfEnZlq0Pa44IoOK FUlSxQiH0k6K9vAK4fWRX7yC5rCRGMwXIJYDmgnRB3nKLtQIGVucU9FrhZrMaL/2asxI L+xqtlHJaVyOkzvbHz5qnzXN/kKMSrdcxrJyWg1bzt2DFhyzbTK2wHsE+oqgg/Wd9Aby v71TduzSbm4EeGORuTG8Qtkvx3ZA6+JW/Khr5MsIa2B56UCG5kSvzo7uXeXA8w1f/Akv qMMA== 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:in-reply-to :references:mime-version:content-transfer-encoding; bh=Irh037ZGGW4R8h8ErESe2jql4GwDXX/8LCDplJHfmvE=; b=saYB5JhdjEtryzLzxVHcHwZcw2PnFlsYzMeNAaP5JmlzhwwuG3El76Ro6HplikERuh 798h7cxukLdqgQG4ypWK+Co7gozySU8WUdkw54GROlrsHj6lwCyYBQcxIzIuIa7owdhw WmO3yX8FdL2DuY4sLz0Rli3ESTZynrMQeXh1WZNxfeY8YEdFNNKYpluujJIT2ppNKpYL Q7dyAtzX6HwYX6sSFQDyPX/3QRNwxF/wSWxEHSGTwZubDRwBDB1iKdeYx08bcb11cQe+ U60wbkWFahZv/4/32Stm5ioRL6psSeajxtI6QNt5J4K2VYps97QSu2dIIJiS2x5mntEA nEMw== X-Gm-Message-State: APjAAAXhx1TCTw0lUN4ZZLcBGWgAWNa26tIAowc8HTxr8CPGwTAsqt0b j+QE9GzrawQ2zyVEvSfNWe6eJfC+Ovk= X-Google-Smtp-Source: APXvYqwruU9DaLKIb6xRV4Fw4pyF9TzhH9kk4auCOczJQ9JfXMMF0kQ85mZk43VJz8kRKldvx/JeOQ== X-Received: by 2002:a2e:2201:: with SMTP id i1mr2094350lji.110.1575369336155; Tue, 03 Dec 2019 02:35:36 -0800 (PST) Received: from oberon.eng.vmware.com ([146.247.46.5]) by smtp.gmail.com with ESMTPSA id t9sm1053023lfl.51.2019.12.03.02.35.34 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 03 Dec 2019 02:35:35 -0800 (PST) From: "Tzvetomir Stoyanov (VMware)" To: rostedt@goodmis.org Cc: linux-trace-devel@vger.kernel.org Subject: [PATCH v17 08/18] trace-cmd: Implement new API tracecmd_add_option_v() Date: Tue, 3 Dec 2019 12:35:12 +0200 Message-Id: <20191203103522.482684-9-tz.stoyanov@gmail.com> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20191203103522.482684-1-tz.stoyanov@gmail.com> References: <20191203103522.482684-1-tz.stoyanov@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-trace-devel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-trace-devel@vger.kernel.org From: Tzvetomir Stoyanov A new tracecmd API tracecmd_add_option_v() is introduced. It adds new option in trace.dat, similar to tracecmd_add_option(), but the option's data is passed as list of buffers. The standard struct iovec is used as input parameter, containing the option's data buffers. Signed-off-by: Tzvetomir Stoyanov --- include/trace-cmd/trace-cmd.h | 5 ++ include/traceevent/event-parse.h | 1 + lib/trace-cmd/trace-output.c | 116 +++++++++++++++++++++++++++---- 3 files changed, 108 insertions(+), 14 deletions(-) diff --git a/include/trace-cmd/trace-cmd.h b/include/trace-cmd/trace-cmd.h index 831bb1a..47fa463 100644 --- a/include/trace-cmd/trace-cmd.h +++ b/include/trace-cmd/trace-cmd.h @@ -261,11 +261,16 @@ struct tracecmd_output *tracecmd_create_init_file_override(const char *output_fi struct tracecmd_option *tracecmd_add_option(struct tracecmd_output *handle, unsigned short id, int size, const void *data); +struct tracecmd_option * +tracecmd_add_option_v(struct tracecmd_output *handle, + unsigned short id, const struct iovec *vector, int count); + struct tracecmd_option *tracecmd_add_buffer_option(struct tracecmd_output *handle, const char *name, int cpus); int tracecmd_write_cpus(struct tracecmd_output *handle, int cpus); int tracecmd_write_options(struct tracecmd_output *handle); +int tracecmd_append_options(struct tracecmd_output *handle); int tracecmd_update_option(struct tracecmd_output *handle, struct tracecmd_option *option, int size, const void *data); diff --git a/include/traceevent/event-parse.h b/include/traceevent/event-parse.h index a77af4c..30e06a7 100644 --- a/include/traceevent/event-parse.h +++ b/include/traceevent/event-parse.h @@ -11,6 +11,7 @@ #include #include #include +#include #include "traceevent/trace-seq.h" diff --git a/lib/trace-cmd/trace-output.c b/lib/trace-cmd/trace-output.c index be4d3f5..db65ee4 100644 --- a/lib/trace-cmd/trace-output.c +++ b/lib/trace-cmd/trace-output.c @@ -950,21 +950,27 @@ static struct tracecmd_output *create_file(const char *output_file, } /** - * tracecmd_add_option - add options to the file + * tracecmd_add_option_v - add options to the file * @handle: the output file handle name * @id: the id of the option * @size: the size of the option data * @data: the data to write to the file. + * @vector: array of vectors, pointing to the data to write in the file + * @count: number of items in the vector array + * * * Returns handle to update option if needed. * Just the content can be updated, with smaller or equal to * content than the specified size. */ struct tracecmd_option * -tracecmd_add_option(struct tracecmd_output *handle, - unsigned short id, int size, const void *data) +tracecmd_add_option_v(struct tracecmd_output *handle, + unsigned short id, const struct iovec *vector, int count) + { struct tracecmd_option *option; + char *data = NULL; + int i, size = 0; /* * We can only add options before they were written. @@ -973,32 +979,63 @@ tracecmd_add_option(struct tracecmd_output *handle, if (handle->options_written) return NULL; - handle->nr_options++; + for (i = 0; i < count; i++) + size += vector[i].iov_len; + /* Some IDs (like TRACECMD_OPTION_TRACECLOCK) pass vector with 0 / NULL data */ + if (size) { + data = malloc(size); + if (!data) { + warning("Insufficient memory"); + return NULL; + } + } option = malloc(sizeof(*option)); if (!option) { warning("Could not allocate space for option"); + free(data); return NULL; } - option->id = id; - option->size = size; - option->data = malloc(size); - if (!option->data) { - warning("Insufficient memory"); - free(option); - return NULL; + handle->nr_options++; + option->data = data; + for (i = 0; i < count; i++) { + if (vector[i].iov_base && vector[i].iov_len) { + memcpy(data, vector[i].iov_base, vector[i].iov_len); + data += vector[i].iov_len; + } } - /* Some IDs (like TRACECMD_OPTION_TRACECLOCK) pass 0 / NULL data */ - if (size) - memcpy(option->data, data, size); + option->size = size; + option->id = id; list_add_tail(&option->list, &handle->options); return option; } +/** + * tracecmd_add_option - add options to the file + * @handle: the output file handle name + * @id: the id of the option + * @size: the size of the option data + * @data: the data to write to the file. + * + * Returns handle to update option if needed. + * Just the content can be updated, with smaller or equal to + * content than the specified size. + */ +struct tracecmd_option * +tracecmd_add_option(struct tracecmd_output *handle, + unsigned short id, int size, const void *data) +{ + struct iovec vect; + + vect.iov_base = (void *) data; + vect.iov_len = size; + return tracecmd_add_option_v(handle, id, &vect, 1); +} + int tracecmd_write_cpus(struct tracecmd_output *handle, int cpus) { cpus = convert_endian_4(handle, cpus); @@ -1046,6 +1083,57 @@ int tracecmd_write_options(struct tracecmd_output *handle) return 0; } +int tracecmd_append_options(struct tracecmd_output *handle) +{ + struct tracecmd_option *options; + unsigned short option; + unsigned short endian2; + unsigned int endian4; + off_t offset; + int r; + + /* If already written, ignore */ + if (handle->options_written) + return 0; + + if (lseek64(handle->fd, 0, SEEK_END) == (off_t)-1) + return -1; + offset = lseek64(handle->fd, -2, SEEK_CUR); + if (offset == (off_t)-1) + return -1; + + r = pread(handle->fd, &option, 2, offset); + if (r != 2 || option != TRACECMD_OPTION_DONE) + return -1; + + list_for_each_entry(options, &handle->options, list) { + endian2 = convert_endian_2(handle, options->id); + if (do_write_check(handle, &endian2, 2)) + return -1; + + endian4 = convert_endian_4(handle, options->size); + if (do_write_check(handle, &endian4, 4)) + return -1; + + /* Save the data location in case it needs to be updated */ + options->offset = lseek64(handle->fd, 0, SEEK_CUR); + + if (do_write_check(handle, options->data, + options->size)) + return -1; + } + + option = TRACECMD_OPTION_DONE; + + if (do_write_check(handle, &option, 2)) + return -1; + + handle->options_written = 1; + handle->options_written = 1; + + return 0; +} + int tracecmd_update_option(struct tracecmd_output *handle, struct tracecmd_option *option, int size, const void *data) -- 2.23.0