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 Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 93D8AC04A95 for ; Fri, 23 Sep 2022 23:22:27 +0000 (UTC) Received: from localhost ([::1]:44472 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1obs02-0003NQ-2i for qemu-devel@archiver.kernel.org; Fri, 23 Sep 2022 19:22:26 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:56682) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1obryx-00025u-7X for qemu-devel@nongnu.org; Fri, 23 Sep 2022 19:21:19 -0400 Received: from smtp-out2.suse.de ([195.135.220.29]:37312) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1obryv-0007LA-CF for qemu-devel@nongnu.org; Fri, 23 Sep 2022 19:21:18 -0400 Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by smtp-out2.suse.de (Postfix) with ESMTPS id 875A81F86C; Fri, 23 Sep 2022 23:21:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1663975275; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=pnN2a7gH8at79pgmUdjkYid+EpTRGVuY/07oP8GI67w=; b=fdxKPjYiCkpYOk3YH+w3Oy//cvW40M75UwBOl552ajbhuBYh38An2BR6RnLEjc8piiMjt0 TKOSiQpEBPO7L/L2ncvuLBq4TWiUnHCF2kq8D8wNdzDln5cHWl9IK9tFB3J+WHvIWxghbL vzsxA718dUPHbpsl7RjPF3R0sKTzgYM= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1663975275; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=pnN2a7gH8at79pgmUdjkYid+EpTRGVuY/07oP8GI67w=; b=6g1cH55vxnqeiQPtbphCBZPJwKahtCpGp5KB2KUHV5HndDfti3axZ3XefAJBwFhAcIDTjY E6UVQsA2UBQxndBw== Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by imap2.suse-dmz.suse.de (Postfix) with ESMTPS id 2DB5D13A00; Fri, 23 Sep 2022 23:21:15 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id D3qbCWs/LmPcUwAAMHmgww (envelope-from ); Fri, 23 Sep 2022 23:21:15 +0000 From: Claudio Fontana To: Paolo Bonzini , Richard Henderson , Markus Armbruster , Kevin Wolf Cc: qemu-devel@nongnu.org, dinechin@redhat.com, Gerd Hoffmann , =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= , =?UTF-8?q?Daniel=20P=20=2E=20Berrang=C3=A9?= , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , Claudio Fontana Subject: [PATCH v6 0/5] improve error handling for module load Date: Sat, 24 Sep 2022 01:20:59 +0200 Message-Id: <20220923232104.28420-1-cfontana@suse.de> X-Mailer: git-send-email 2.26.2 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=195.135.220.29; envelope-from=cfontana@suse.de; helo=smtp-out2.suse.de X-Spam_score_int: -43 X-Spam_score: -4.4 X-Spam_bar: ---- X-Spam_report: (-4.4 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" CHANGELOG: v5 -> v6: * added a patch by Kevin to handle the dmg warning about missing decompression submodules. (Kevin) * added more verbose comments about all the affected callers of module_load and module_load_qom (Markus) (OPEN ISSUE): change abort() to exit() when type not present even after loading module? (Philippe) v4 -> v5: * added a patch to rename module_load_one and friends to module_load * qdev_new: just reuse module_object_class_by_name, to avoid duplicating code * changed return value of module_load to an int: -1 error (Error **errp set). 0 module or dependencies not installed, 1 loaded 2 already loaded (or built-in) Adapted all callers. * module_load: fixed some pre-existing memory leaks, used an out: label to do the cleanup. v3 -> v4: (Richard) * module_object_class_by_name: return NULL immediately on load error. * audio_driver_lookup: same. * bdrv_find_format: same. * dmg_open: handle optional compression submodules better: f.e., if "dmg-bz2" is not present, continue but offer a warning. If "dmg-bz2" load fails with error, error out and return. * module_load_dso: add newline to error_append_hint. v2 -> v3: * take the file existence check outside of module_load_file, rename module_load_file to module_load_dso, will be called only on an existing file. This will simplify the return value. (Richard) * move exported function documentation into header files (Richard) v1 -> v2: * do not treat the display help text any differently and do report module load _errors_. If the module does not exist (ENOENT, ENOTDIR), no error will be produced. DESCRIPTION: while investigating a permission issue in accel, where accel-tcg-x86_64.so was not accessible, I noticed that no errors were produced regarding the module load failure. This series attempts to improve module_load_one and module_load_qom_one to handle the error cases better and produce some errors. Patch 1 is already reviewed and is about removing an unused existing argument "mayfail" from the call stack. Patch 2 is the real meat, and that one I would say is RFC. Will follow up with comments on the specific questions I have. Patch 3 finally adds a simple check in accel/, aborting if a module is not found, but relying on the existing error report from module_load_qom_one. Claudio Fontana (4): module: removed unused function argument "mayfail" module: rename module_load_one to module_load module: add Error arguments to module_load and module_load_qom accel: abort if we fail to load the accelerator plugin Kevin Wolf (1): dmg: warn when opening dmg images containing blocks of unknown type accel/accel-softmmu.c | 8 +- audio/audio.c | 16 ++-- block.c | 21 ++++- block/dmg.c | 31 +++++- hw/core/qdev.c | 5 +- include/qemu/module.h | 37 +++++++- qom/object.c | 18 +++- softmmu/qtest.c | 8 +- ui/console.c | 18 +++- util/module.c | 213 +++++++++++++++++++++++------------------- 10 files changed, 249 insertions(+), 126 deletions(-) -- 2.26.2