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{ "id": 470, "url": "http://patches.dpdk.org/api/covers/470/?format=api", "web_url": "http://patches.dpdk.org/project/dpdk/cover/20231208145950.2184940-1-david.marchand@redhat.com/", "project": { "id": 1, "url": "http://patches.dpdk.org/api/projects/1/?format=api", "name": "DPDK", "link_name": "dpdk", "list_id": "dev.dpdk.org", "list_email": "dev@dpdk.org", "web_url": "http://core.dpdk.org", "scm_url": "git://dpdk.org/dpdk", "webscm_url": "http://git.dpdk.org/dpdk", "list_archive_url": "https://inbox.dpdk.org/dev", "list_archive_url_format": "https://inbox.dpdk.org/dev/{}", "commit_url_format": "" }, "msgid": "<20231208145950.2184940-1-david.marchand@redhat.com>", "list_archive_url": "https://inbox.dpdk.org/dev/20231208145950.2184940-1-david.marchand@redhat.com", "date": "2023-12-08T14:59:34", "name": "[RFC,v2,00/14] Detect superfluous newline in logs", "submitter": { "id": 1173, "url": "http://patches.dpdk.org/api/people/1173/?format=api", "name": "David Marchand", "email": "david.marchand@redhat.com" }, "mbox": "http://patches.dpdk.org/project/dpdk/cover/20231208145950.2184940-1-david.marchand@redhat.com/mbox/", "series": [ { "id": 30493, "url": "http://patches.dpdk.org/api/series/30493/?format=api", "web_url": "http://patches.dpdk.org/project/dpdk/list/?series=30493", "date": "2023-12-08T14:59:34", "name": "Detect superfluous newline in logs", "version": 2, "mbox": "http://patches.dpdk.org/series/30493/mbox/" } ], "comments": "http://patches.dpdk.org/api/covers/470/comments/", "headers": { "Return-Path": "<dev-bounces@dpdk.org>", "X-Original-To": "patchwork@inbox.dpdk.org", "Delivered-To": "patchwork@inbox.dpdk.org", "Received": [ "from mails.dpdk.org (mails.dpdk.org [217.70.189.124])\n\tby inbox.dpdk.org (Postfix) with ESMTP id E4797436AA;\n\tFri, 8 Dec 2023 15:59:58 +0100 (CET)", "from mails.dpdk.org (localhost [127.0.0.1])\n\tby mails.dpdk.org (Postfix) with ESMTP id 797F5402CD;\n\tFri, 8 Dec 2023 15:59:58 +0100 (CET)", "from us-smtp-delivery-124.mimecast.com\n (us-smtp-delivery-124.mimecast.com [170.10.133.124])\n by mails.dpdk.org (Postfix) with ESMTP id 1CB60402CC\n for <dev@dpdk.org>; Fri, 8 Dec 2023 15:59:56 +0100 (CET)", "from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com\n [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS\n (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id\n us-mta-226-xzsoxKWmMA6ALzTwx1F8NA-1; Fri, 08 Dec 2023 09:59:54 -0500", "from smtp.corp.redhat.com (int-mx08.intmail.prod.int.rdu2.redhat.com\n [10.11.54.8])\n (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)\n key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest\n SHA256)\n (No client certificate requested)\n by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 1E4F3185A787;\n Fri, 8 Dec 2023 14:59:54 +0000 (UTC)", "from dmarchan.redhat.com (unknown [10.45.224.122])\n by smtp.corp.redhat.com (Postfix) with ESMTP id 80E0AC18572;\n Fri, 8 Dec 2023 14:59:52 +0000 (UTC)" ], "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com;\n s=mimecast20190719; t=1702047596;\n h=from:from:reply-to:subject:subject:date:date:message-id:message-id:\n to:to:cc:cc:mime-version:mime-version:content-type:content-type:\n content-transfer-encoding:content-transfer-encoding:\n in-reply-to:in-reply-to:references:references;\n bh=3jyNT2QrZd/DM8y4ci2DMsLdgNTiVw9I/H9+3lCoal8=;\n b=SX7IN0kbMOk7/GCdPg7mfCk1tfIPhrr6qaM2FbrvYVqfikMyxtyUtUSO6TLKaHT3jIJr7C\n U+zpkLl2o68vhrR0l6U44u3Na1/YAxUZgt0G1kPHwGOOtpo44fH0R3IfvJl07W7QBYZZ5E\n eAn0Kl32UFomfDjORx/Vu5HNCKYpMuE=", "X-MC-Unique": "xzsoxKWmMA6ALzTwx1F8NA-1", "From": "David Marchand <david.marchand@redhat.com>", "To": "dev@dpdk.org", "Cc": "thomas@monjalon.net, ferruh.yigit@amd.com, bruce.richardson@intel.com,\n stephen@networkplumber.org, mb@smartsharesystems.com", "Subject": "[RFC v2 00/14] Detect superfluous newline in logs", "Date": "Fri, 8 Dec 2023 15:59:34 +0100", "Message-ID": "<20231208145950.2184940-1-david.marchand@redhat.com>", "In-Reply-To": "<20231117131824.1977792-1-david.marchand@redhat.com>", "References": "<20231117131824.1977792-1-david.marchand@redhat.com>", "MIME-Version": "1.0", "X-Scanned-By": "MIMEDefang 3.4.1 on 10.11.54.8", "X-Mimecast-Spam-Score": "0", "X-Mimecast-Originator": "redhat.com", "Content-Transfer-Encoding": "8bit", "Content-Type": "text/plain; charset=\"US-ASCII\"; x-default=true", "X-BeenThere": "dev@dpdk.org", "X-Mailman-Version": "2.1.29", "Precedence": "list", "List-Id": "DPDK patches and discussions <dev.dpdk.org>", "List-Unsubscribe": "<https://mails.dpdk.org/options/dev>,\n <mailto:dev-request@dpdk.org?subject=unsubscribe>", "List-Archive": "<http://mails.dpdk.org/archives/dev/>", "List-Post": "<mailto:dev@dpdk.org>", "List-Help": "<mailto:dev-request@dpdk.org?subject=help>", "List-Subscribe": "<https://mails.dpdk.org/listinfo/dev>,\n <mailto:dev-request@dpdk.org?subject=subscribe>", "Errors-To": "dev-bounces@dpdk.org" }, "content": "Getting readable and consistent logs is important when running a DPDK\napplication, especially when troubleshooting.\nA common issue with logs is when a DPDK change do not add (or on the\ncontrary add too many \\n) in the format string.\n\nThis issue would only get noticed when actually hitting this log (which\nmay be a situation hard to reach).\n\nThis series proposes to introduce a new RTE_LOG_LINE helper that is\nresponsible for logging a one line message and spews a build error (with\ngcc) if any \\n is part of the format string.\n\n\nBecause this is still a RFC and a lot of changes are added in this v2, no ack\nfrom the v1 has been kept.\n\nSince the v1 discussion on the cover letter, I changed my mind, and made the\nchoice to break existing logging helpers exported in the public API.\nThe reasoning is that those should not be used in the first place:\nlogs should be produced only by the library that registers the logtype.\n\nSome multiline logging for debugging and the test assert macros are\nstill present, but in this case an explicit call to RTE_LOG() is done.\nThis can be checked with a simple:\n$ git grep 'RTE_LOG(' -- lib/ :^lib/log/\nlib/acl/acl_bld.c: RTE_LOG(DEBUG, ACL, \"Build phase for ACL \\\"%s\\\":\\n\"\nlib/acl/acl_gen.c: RTE_LOG(DEBUG, ACL, \"Gen phase for ACL \\\"%s\\\":\\n\"\nlib/bpf/bpf_validate.c: RTE_LOG(DEBUG, BPF, \"%s(%p) stats:\\n\"\nlib/bpf/bpf_validate.c: RTE_LOG(DEBUG, BPF,\nlib/eal/common/eal_common_debug.c: RTE_LOG(CRIT, EAL, \"Error - exiting with code: %d\\n\"\nlib/eal/include/rte_test.h: RTE_LOG(ERR, EAL, \"Test assert %s line %d failed: \" \\\nlib/ip_frag/ip_frag_common.h:#define IP_FRAG_LOG(lvl, fmt, args...) RTE_LOG(lvl, IPFRAG, fmt, ##args)\nlib/sched/rte_sched.c: RTE_LOG(DEBUG, SCHED, \"Low level config for pipe profile %u:\\n\"\nlib/sched/rte_sched.c: RTE_LOG(DEBUG, SCHED, \"Low level config for subport profile %u:\\n\"\n\n\nChanges since RFC v1:\n- rebased after Stephen log changes,\n- added more fixes as I was making progress on the topic,\n- added a check so dpdk developers stop using RTE_LOG(),\n- added preparation patches, like \"lib: replace logging helpers\",\n- converted all libraries, keeping some special cases with explicit\n calls to RTE_LOG," }