From patchwork Mon Sep 13 12:47:47 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Tzvetomir Stoyanov (VMware)" X-Patchwork-Id: 12488877 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=-12.9 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,UNWANTED_LANGUAGE_BODY, 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 E0DB9C433F5 for ; Mon, 13 Sep 2021 12:48:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C86D560FBF for ; Mon, 13 Sep 2021 12:48:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234951AbhIMMuM (ORCPT ); Mon, 13 Sep 2021 08:50:12 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51114 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235510AbhIMMtO (ORCPT ); Mon, 13 Sep 2021 08:49:14 -0400 Received: from mail-wr1-x431.google.com (mail-wr1-x431.google.com [IPv6:2a00:1450:4864:20::431]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A488BC061574 for ; Mon, 13 Sep 2021 05:47:58 -0700 (PDT) Received: by mail-wr1-x431.google.com with SMTP id x6so14479596wrv.13 for ; Mon, 13 Sep 2021 05:47:58 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=aCECAkJ+AmB28g1g/FT1kcdtEf2WJ5s5SYF7g1An2FA=; b=jZWfTfAd+YXXB5kBV85zecUF43Idn/kPJPdHXTvRNbmkqMaDniTSpQmP5m797SfRt7 6SSWaS1jlYhmnU9VlFkWOSu/d4eixa1cb9V3X469T9uxnrmChovmINLYZ3D3p+8ICPMy A6dtAoJXxw1+zE0oiZnp9boCt8jLDY9P3P7ajU1dOEjIspwonvuf7J7hfuE8BOGJY1FN d4hAgAqFwG3+y7rWNU1t8ot4lcLM84NHH8DwcR8+0GJ41YwtFTXeUTQPLiAjf7w5Fsyb GwuTthXk7Ocpb1JFJw99yvgHv/4esmW/wtbF75DQiTg4cooretlu3K7+eg8bUR6S/pKE eaNg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=aCECAkJ+AmB28g1g/FT1kcdtEf2WJ5s5SYF7g1An2FA=; b=MMXQ4YVd8EWpCs9+5mMfTpdo6IaNuNP+AMk2IAGV9S4tAbvAXEGIvWFpMqdzTAPFm/ V4UgYmyvUFjPOzuEkrPzoxEGi8HSCJlmfkoAO6to+N8Ri3SvWPtO4tnhweCtkF0Ea1vo xVbReLY5gxWSyi4GDGeInAMVQmTlDtO2pPAHXFShMFrpbPGQXaFCvLHEky31k8XBHDAw pvsXTQ/9Eb603d3wFx1ggL1sP1pbo7rfEyzDuRaq9SbMKKCDMDstmZnsdN9SB9SZgOQL Npip+vKkqPxTlcdiBD+VqJaX6xQNdLbj6Rnw4jnjDfyKrQ4KdAkySc3DsxU7tuaUm1kl OvbA== X-Gm-Message-State: AOAM531q6oP7p+8byD0nSJ7jeMSsUI4O/93oud55RwmNGGAuLGYyqk2k zXvncAaecuwYBwzwPGmvTrjFH5PkzPo= X-Google-Smtp-Source: ABdhPJwl071CuUgnihG873cxOWz8p1Bz7UeF8MvWDNkbRbf4QMK/946POvyCgzKnl8TuNAJRRH1GiA== X-Received: by 2002:a5d:5258:: with SMTP id k24mr12315647wrc.390.1631537277142; Mon, 13 Sep 2021 05:47:57 -0700 (PDT) Received: from oberon.zico.biz ([83.222.187.186]) by smtp.gmail.com with ESMTPSA id k17sm7718077wmj.0.2021.09.13.05.47.56 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 13 Sep 2021 05:47:56 -0700 (PDT) From: "Tzvetomir Stoyanov (VMware)" To: rostedt@goodmis.org Cc: linux-trace-devel@vger.kernel.org Subject: [PATCH 1/8] trace-cmd library: Use output handler when copying data from input file Date: Mon, 13 Sep 2021 15:47:47 +0300 Message-Id: <20210913124754.3679916-2-tz.stoyanov@gmail.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210913124754.3679916-1-tz.stoyanov@gmail.com> References: <20210913124754.3679916-1-tz.stoyanov@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-trace-devel@vger.kernel.org When copying data between two trace files, use input and output handlers, instead of raw file descriptors. Handlers take care of file version and compression context. Signed-off-by: Tzvetomir Stoyanov (VMware) --- .../include/private/trace-cmd-private.h | 3 +- lib/trace-cmd/include/trace-cmd-local.h | 2 + lib/trace-cmd/trace-input.c | 145 +++++++++--------- lib/trace-cmd/trace-output.c | 6 +- 4 files changed, 82 insertions(+), 74 deletions(-) diff --git a/lib/trace-cmd/include/private/trace-cmd-private.h b/lib/trace-cmd/include/private/trace-cmd-private.h index 8f5408ff..8ff46d52 100644 --- a/lib/trace-cmd/include/private/trace-cmd-private.h +++ b/lib/trace-cmd/include/private/trace-cmd-private.h @@ -185,7 +185,8 @@ int tracecmd_get_parsing_failures(struct tracecmd_input *handle); int tracecmd_long_size(struct tracecmd_input *handle); int tracecmd_page_size(struct tracecmd_input *handle); int tracecmd_cpus(struct tracecmd_input *handle); -int tracecmd_copy_headers(struct tracecmd_input *handle, int fd, +int tracecmd_copy_headers(struct tracecmd_input *in_handle, + struct tracecmd_output *out_handle, enum tracecmd_file_states start_state, enum tracecmd_file_states end_state); void tracecmd_set_flag(struct tracecmd_input *handle, int flag); diff --git a/lib/trace-cmd/include/trace-cmd-local.h b/lib/trace-cmd/include/trace-cmd-local.h index 9ab33553..18d2d05b 100644 --- a/lib/trace-cmd/include/trace-cmd-local.h +++ b/lib/trace-cmd/include/trace-cmd-local.h @@ -57,6 +57,8 @@ out_write_section_header(struct tracecmd_output *handle, unsigned short header_i char *description, enum tracecmd_section_flags flags, bool option); int out_update_section_header(struct tracecmd_output *handle, unsigned long long offset); +long long do_write_check(struct tracecmd_output *handle, const void *data, long long size); + struct cpu_data_source { int fd; int size; diff --git a/lib/trace-cmd/trace-input.c b/lib/trace-cmd/trace-input.c index 6ed5edf9..5cc881a8 100644 --- a/lib/trace-cmd/trace-input.c +++ b/lib/trace-cmd/trace-input.c @@ -4391,44 +4391,47 @@ void tracecmd_close(struct tracecmd_input *handle) free(handle); } -static int read_copy_size8(struct tracecmd_input *handle, int fd, unsigned long long *size) +static int read_copy_size8(struct tracecmd_input *in_handle, + struct tracecmd_output *out_handle, unsigned long long *size) { /* read size */ - if (do_read_check(handle, size, 8)) + if (do_read_check(in_handle, size, 8)) return -1; - if (__do_write_check(fd, size, 8)) + if (do_write_check(out_handle, size, 8)) return -1; - *size = tep_read_number(handle->pevent, size, 8); + *size = tep_read_number(in_handle->pevent, size, 8); return 0; } -static int read_copy_size4(struct tracecmd_input *handle, int fd, unsigned int *size) +static int read_copy_size4(struct tracecmd_input *in_handle, struct tracecmd_output *out_handle, + unsigned int *size) { /* read size */ - if (do_read_check(handle, size, 4)) + if (do_read_check(in_handle, size, 4)) return -1; - if (__do_write_check(fd, size, 4)) + if (do_write_check(out_handle, size, 4)) return -1; - *size = tep_read_number(handle->pevent, size, 4); + *size = tep_read_number(in_handle->pevent, size, 4); return 0; } -static int read_copy_data(struct tracecmd_input *handle, - unsigned long long size, int fd) +static int read_copy_data(struct tracecmd_input *in_handle, + unsigned long long size, + struct tracecmd_output *out_handle) { char *buf; buf = malloc(size); if (!buf) return -1; - if (do_read_check(handle, buf, size)) + if (do_read_check(in_handle, buf, size)) goto failed_read; - if (__do_write_check(fd, buf, size)) + if (do_write_check(out_handle, buf, size)) goto failed_read; free(buf); @@ -4440,65 +4443,66 @@ static int read_copy_data(struct tracecmd_input *handle, return -1; } -static int copy_header_files(struct tracecmd_input *handle, int fd) +static int copy_header_files(struct tracecmd_input *in_handle, + struct tracecmd_output *out_handle) { unsigned long long size; - if (handle->file_state != TRACECMD_FILE_HEADERS - 1) + if (in_handle->file_state != TRACECMD_FILE_HEADERS - 1) return -1; /* "header_page" */ - if (read_copy_data(handle, 12, fd) < 0) + if (read_copy_data(in_handle, 12, out_handle) < 0) return -1; - if (read_copy_size8(handle, fd, &size) < 0) + if (read_copy_size8(in_handle, out_handle, &size) < 0) return -1; - if (read_copy_data(handle, size, fd) < 0) + if (read_copy_data(in_handle, size, out_handle) < 0) return -1; /* "header_event" */ - if (read_copy_data(handle, 13, fd) < 0) + if (read_copy_data(in_handle, 13, out_handle) < 0) return -1; - if (read_copy_size8(handle, fd, &size) < 0) + if (read_copy_size8(in_handle, out_handle, &size) < 0) return -1; - if (read_copy_data(handle, size, fd) < 0) + if (read_copy_data(in_handle, size, out_handle) < 0) return -1; - handle->file_state = TRACECMD_FILE_HEADERS; + in_handle->file_state = TRACECMD_FILE_HEADERS; return 0; } -static int copy_ftrace_files(struct tracecmd_input *handle, int fd) +static int copy_ftrace_files(struct tracecmd_input *in_handle, struct tracecmd_output *out_handle) { unsigned long long size; unsigned int count; unsigned int i; - if (handle->file_state != TRACECMD_FILE_FTRACE_EVENTS - 1) + if (in_handle->file_state != TRACECMD_FILE_FTRACE_EVENTS - 1) return -1; - if (read_copy_size4(handle, fd, &count) < 0) + if (read_copy_size4(in_handle, out_handle, &count) < 0) return -1; for (i = 0; i < count; i++) { - if (read_copy_size8(handle, fd, &size) < 0) + if (read_copy_size8(in_handle, out_handle, &size) < 0) return -1; - if (read_copy_data(handle, size, fd) < 0) + if (read_copy_data(in_handle, size, out_handle) < 0) return -1; } - handle->file_state = TRACECMD_FILE_FTRACE_EVENTS; + in_handle->file_state = TRACECMD_FILE_FTRACE_EVENTS; return 0; } -static int copy_event_files(struct tracecmd_input *handle, int fd) +static int copy_event_files(struct tracecmd_input *in_handle, struct tracecmd_output *out_handle) { unsigned long long size; char *system; @@ -4506,103 +4510,103 @@ static int copy_event_files(struct tracecmd_input *handle, int fd) unsigned int count; unsigned int i,x; - if (handle->file_state != TRACECMD_FILE_ALL_EVENTS - 1) + if (in_handle->file_state != TRACECMD_FILE_ALL_EVENTS - 1) return -1; - if (read_copy_size4(handle, fd, &systems) < 0) + if (read_copy_size4(in_handle, out_handle, &systems) < 0) return -1; for (i = 0; i < systems; i++) { - system = read_string(handle); + system = read_string(in_handle); if (!system) return -1; - if (__do_write_check(fd, system, strlen(system) + 1)) { + if (do_write_check(out_handle, system, strlen(system) + 1)) { free(system); return -1; } free(system); - if (read_copy_size4(handle, fd, &count) < 0) + if (read_copy_size4(in_handle, out_handle, &count) < 0) return -1; for (x=0; x < count; x++) { - if (read_copy_size8(handle, fd, &size) < 0) + if (read_copy_size8(in_handle, out_handle, &size) < 0) return -1; - if (read_copy_data(handle, size, fd) < 0) + if (read_copy_data(in_handle, size, out_handle) < 0) return -1; } } - handle->file_state = TRACECMD_FILE_ALL_EVENTS; + in_handle->file_state = TRACECMD_FILE_ALL_EVENTS; return 0; } -static int copy_proc_kallsyms(struct tracecmd_input *handle, int fd) +static int copy_proc_kallsyms(struct tracecmd_input *in_handle, struct tracecmd_output *out_handle) { unsigned int size; - if (handle->file_state != TRACECMD_FILE_KALLSYMS - 1) + if (in_handle->file_state != TRACECMD_FILE_KALLSYMS - 1) return -1; - if (read_copy_size4(handle, fd, &size) < 0) + if (read_copy_size4(in_handle, out_handle, &size) < 0) return -1; if (!size) return 0; /* OK? */ - if (read_copy_data(handle, size, fd) < 0) + if (read_copy_data(in_handle, size, out_handle) < 0) return -1; - handle->file_state = TRACECMD_FILE_KALLSYMS; + in_handle->file_state = TRACECMD_FILE_KALLSYMS; return 0; } -static int copy_ftrace_printk(struct tracecmd_input *handle, int fd) +static int copy_ftrace_printk(struct tracecmd_input *in_handle, struct tracecmd_output *out_handle) { unsigned int size; - if (handle->file_state != TRACECMD_FILE_PRINTK - 1) + if (in_handle->file_state != TRACECMD_FILE_PRINTK - 1) return -1; - if (read_copy_size4(handle, fd, &size) < 0) + if (read_copy_size4(in_handle, out_handle, &size) < 0) return -1; if (!size) return 0; /* OK? */ - if (read_copy_data(handle, size, fd) < 0) + if (read_copy_data(in_handle, size, out_handle) < 0) return -1; - handle->file_state = TRACECMD_FILE_PRINTK; + in_handle->file_state = TRACECMD_FILE_PRINTK; return 0; } -static int copy_command_lines(struct tracecmd_input *handle, int fd) +static int copy_command_lines(struct tracecmd_input *in_handle, struct tracecmd_output *out_handle) { unsigned long long size; - if (handle->file_state != TRACECMD_FILE_CMD_LINES - 1) + if (in_handle->file_state != TRACECMD_FILE_CMD_LINES - 1) return -1; - if (read_copy_size8(handle, fd, &size) < 0) + if (read_copy_size8(in_handle, out_handle, &size) < 0) return -1; if (!size) return 0; /* OK? */ - if (read_copy_data(handle, size, fd) < 0) + if (read_copy_data(in_handle, size, out_handle) < 0) return -1; - handle->file_state = TRACECMD_FILE_CMD_LINES; + in_handle->file_state = TRACECMD_FILE_CMD_LINES; return 0; } /** * tracecmd_copy_headers - Copy headers from a tracecmd_input handle to a file descriptor - * @handle: input handle for the trace.dat file to copy from. - * @fd: The file descriptor to copy to. + * @in_handle: input handle for the trace.dat file to copy from. + * @out_handle: output handle to the trace.dat file to copy to. * @start_state: The file state to start copying from (zero for the beginnig) * @end_state: The file state to stop at (zero for up to cmdlines) * @@ -4613,7 +4617,8 @@ static int copy_command_lines(struct tracecmd_input *handle, int fd) * NOTE: The input handle is also modified, and ends at the end * state as well. */ -int tracecmd_copy_headers(struct tracecmd_input *handle, int fd, +int tracecmd_copy_headers(struct tracecmd_input *in_handle, + struct tracecmd_output *out_handle, enum tracecmd_file_states start_state, enum tracecmd_file_states end_state) { @@ -4631,71 +4636,71 @@ int tracecmd_copy_headers(struct tracecmd_input *handle, int fd, if (end_state < TRACECMD_FILE_HEADERS) return 0; - if (handle->file_state >= start_state) { + if (in_handle->file_state >= start_state) { /* Set the handle to just before the start state */ - sec = section_open(handle, TRACECMD_OPTION_HEADER_INFO); + sec = section_open(in_handle, TRACECMD_OPTION_HEADER_INFO); if (!sec) return -1; /* Now that the file handle has moved, change its state */ - handle->file_state = TRACECMD_FILE_INIT; + in_handle->file_state = TRACECMD_FILE_INIT; } /* Try to bring the input up to the start state - 1 */ - ret = tracecmd_read_headers(handle, start_state - 1); + ret = tracecmd_read_headers(in_handle, start_state - 1); if (sec) - section_close(handle, sec); + section_close(in_handle, sec); if (ret < 0) goto out; switch (start_state) { case TRACECMD_FILE_HEADERS: - ret = copy_header_files(handle, fd); + ret = copy_header_files(in_handle, out_handle); if (ret < 0) goto out; /* fallthrough */ case TRACECMD_FILE_FTRACE_EVENTS: /* handle's state is now updating with the copies */ - if (end_state <= handle->file_state) + if (end_state <= in_handle->file_state) return 0; - ret = copy_ftrace_files(handle, fd); + ret = copy_ftrace_files(in_handle, out_handle); if (ret < 0) goto out; /* fallthrough */ case TRACECMD_FILE_ALL_EVENTS: - if (end_state <= handle->file_state) + if (end_state <= in_handle->file_state) return 0; - ret = copy_event_files(handle, fd); + ret = copy_event_files(in_handle, out_handle); if (ret < 0) goto out; /* fallthrough */ case TRACECMD_FILE_KALLSYMS: - if (end_state <= handle->file_state) + if (end_state <= in_handle->file_state) return 0; - ret = copy_proc_kallsyms(handle, fd); + ret = copy_proc_kallsyms(in_handle, out_handle); if (ret < 0) goto out; /* fallthrough */ case TRACECMD_FILE_PRINTK: - if (end_state <= handle->file_state) + if (end_state <= in_handle->file_state) return 0; - ret = copy_ftrace_printk(handle, fd); + ret = copy_ftrace_printk(in_handle, out_handle); if (ret < 0) goto out; /* fallthrough */ case TRACECMD_FILE_CMD_LINES: - if (end_state <= handle->file_state) + if (end_state <= in_handle->file_state) return 0; - ret = copy_command_lines(handle, fd); + ret = copy_command_lines(in_handle, out_handle); default: break; } diff --git a/lib/trace-cmd/trace-output.c b/lib/trace-cmd/trace-output.c index 89b502b4..2c55e95c 100644 --- a/lib/trace-cmd/trace-output.c +++ b/lib/trace-cmd/trace-output.c @@ -88,8 +88,8 @@ struct list_event_system { #define HAS_SECTIONS(H) ((H)->file_version >= FILE_VERSION_SECTIONS) -static stsize_t -do_write_check(struct tracecmd_output *handle, const void *data, tsize_t size) +__hidden long long +do_write_check(struct tracecmd_output *handle, const void *data, long long size) { if (handle->do_compress) return tracecmd_compress_write(handle->compress, data, size); @@ -2489,7 +2489,7 @@ struct tracecmd_output *tracecmd_copy(struct tracecmd_input *ihandle, goto out_free; tracecmd_output_write_init(handle); - if (tracecmd_copy_headers(ihandle, handle->fd, 0, 0) < 0) + if (tracecmd_copy_headers(ihandle, handle, 0, 0) < 0) goto out_free; handle->file_state = tracecmd_get_file_state(ihandle);