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bh=DrJoT2mme5tiUuxY8ehMiYluimnojZPY9gf+ekV5a7Y=; b=YgKjKm+93AI+X6HxFsJomU4pFXbJ2g12IImcXkq6NMj64QNIUX6Ky+cJoVePqEPSpjw3Du IvzVIY7G3rKx2zxENYyd7A5QbyMK3SmqX4VhZmVyD/Vi+95aL6bnWKthH8/9lceZIOZniy UyEyfgHlGi5BhtpuKMZg5FYMtTdUg/w= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-415-njkC0YjgPxGaCTnP-LTswg-1; Mon, 12 Apr 2021 10:37:51 -0400 X-MC-Unique: njkC0YjgPxGaCTnP-LTswg-1 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 56F30189C44A; Mon, 12 Apr 2021 14:37:50 +0000 (UTC) Received: from thuth.remote.csb (ovpn-112-84.ams2.redhat.com [10.36.112.84]) by smtp.corp.redhat.com (Postfix) with ESMTP id 95BC46062F; Mon, 12 Apr 2021 14:37:45 +0000 (UTC) Subject: Re: [PATCH v2] libqtest: refuse QTEST_QEMU_BINARY=qemu-kvm From: Thomas Huth To: Stefan Hajnoczi References: <20210412091824.707855-1-stefanha@redhat.com> <942ea12a-d187-9533-eba6-298c4eb7d82d@redhat.com> Message-ID: <91058fa1-e472-40b1-e2b1-47c242da1eb8@redhat.com> Date: Mon, 12 Apr 2021 16:37:44 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.9.0 MIME-Version: 1.0 In-Reply-To: X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=thuth@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=216.205.24.124; envelope-from=thuth@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, NICE_REPLY_A=-0.001, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, 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: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Laurent Vivier , Emanuele Giuseppe Esposito , Qin Wang , Peter Maydell , qemu-devel@nongnu.org, Paolo Bonzini Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On 12/04/2021 16.35, Thomas Huth wrote: > On 12/04/2021 16.21, Stefan Hajnoczi wrote: >> On Mon, Apr 12, 2021 at 11:35:40AM +0200, Thomas Huth wrote: >>> On 12/04/2021 11.18, Stefan Hajnoczi wrote: >>>> Some downstreams rename the QEMU binary to "qemu-kvm". This breaks >>>> qtest_get_arch(), which attempts to parse the target architecture from >>>> the QTEST_QEMU_BINARY environment variable. >>>> >>>> Print an error instead of returning the architecture "kvm". Things fail >>>> in weird ways when the architecture string is bogus. >>>> >>>> Arguably qtests should always be run in a build directory instead of >>>> against an installed QEMU. In any case, printing a clear error when this >>>> happens is helpful. >>>> >>>> Reported-by: Qin Wang >>>> Cc: Emanuele Giuseppe Esposito >>>> Signed-off-by: Stefan Hajnoczi >>>> --- >>>>    tests/qtest/libqtest.c | 10 ++++++++++ >>>>    1 file changed, 10 insertions(+) >>>> >>>> diff --git a/tests/qtest/libqtest.c b/tests/qtest/libqtest.c >>>> index 71e359efcd..7caf20f56b 100644 >>>> --- a/tests/qtest/libqtest.c >>>> +++ b/tests/qtest/libqtest.c >>>> @@ -910,6 +910,16 @@ const char *qtest_get_arch(void) >>>>            abort(); >>>>        } >>>> +    if (!strstr(qemu, "-system-")) { >>>> +        fprintf(stderr, "QTEST_QEMU_BINARY must end with >>>> *-system- where " >>>> +                        "'arch' is the target architecture (x86_64, >>>> aarch64, " >>>> +                        "etc). If you are using qemu-kvm or another >>>> custom " >>>> +                        "name, please create a symlink like ln -s " >>>> +                        "path/to/qemu-kvm qemu-system-x86_64 and use >>>> that " >>>> +                        "instead.\n"); >>> >>> The text is very long ... maybe add some \n to wrap it after 80 columns? >>> (also not sure whether we really need the second part about the symlink... >>> but I also don't mind leaving it in) >>> >>>> +        abort(); >>> >>> Since this can be triggered by the user, I'd rather use exit(1) instead, >>> what do you think? >> >> Sure, but in that case I guess the abort() call above also needs to be >> changed? It is triggered when the QTEST_QEMU_BINARY path does not >> contain a hyphen ('-') and it currently aborts. > > Drat, you're right, and it was even me who added that :-/ ... if you've got > some spare minutes, could you send a patch for that, too, please? (Otherwise > I'll do it later) Never mind, I just saw that you've fixed it in v3 already :-) Thomas