From patchwork Fri Oct 9 17:51:21 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: John Snow X-Patchwork-Id: 271689 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=BAYES_00,DKIM_INVALID, DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS 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 0BAC3C433DF for ; Fri, 9 Oct 2020 17:56:11 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 7BE5322261 for ; Fri, 9 Oct 2020 17:56:10 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="B+baEBE4" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7BE5322261 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:46110 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kQwcj-0005Or-IA for qemu-devel@archiver.kernel.org; Fri, 09 Oct 2020 13:56:09 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:55724) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kQwYJ-00080c-BU for qemu-devel@nongnu.org; Fri, 09 Oct 2020 13:51:35 -0400 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:38271) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1kQwYG-0007IH-UL for qemu-devel@nongnu.org; Fri, 09 Oct 2020 13:51:34 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1602265891; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=tqTl4RtkP8A4aUSPCN1QLijelH/mJNfhb8wyLHrBLX4=; b=B+baEBE4LRAqZyurCsbMyVItn+ZuZBoge7PRvlaRUnCqA5fx1niIThtfR409lZWLYsP0/E dua/gU2JXtqhXVqaiEsbXj4dDXEbofxdcCW1Lgjqes5Um5CBLLmzPbtyXy/gNRCJTAHr5z M8VYACdThTn2AnmDMr61xnGr+YSLVqg= 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-381-e8YGJb_CP0-tFOjG_MtWog-1; Fri, 09 Oct 2020 13:51:30 -0400 X-MC-Unique: e8YGJb_CP0-tFOjG_MtWog-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 83C4018C520A for ; Fri, 9 Oct 2020 17:51:28 +0000 (UTC) Received: from scv.redhat.com (ovpn-112-203.rdu2.redhat.com [10.10.112.203]) by smtp.corp.redhat.com (Postfix) with ESMTP id C9EC076649; Fri, 9 Oct 2020 17:51:27 +0000 (UTC) From: John Snow To: qemu-devel@nongnu.org Subject: [PATCH 1/3] python: add mypy config Date: Fri, 9 Oct 2020 13:51:21 -0400 Message-Id: <20201009175123.249009-2-jsnow@redhat.com> In-Reply-To: <20201009175123.249009-1-jsnow@redhat.com> References: <20201009175123.249009-1-jsnow@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=jsnow@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=216.205.24.124; envelope-from=jsnow@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/10/09 02:34:37 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 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, RCVD_IN_DNSWL_NONE=-0.0001, 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: Kevin Wolf , Eduardo Habkost , Wainer dos Santos Moschetta , Cleber Rosa , Paolo Bonzini , John Snow Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Formalize the options used for checking the python library. You can run mypy from the directory that mypy.ini is in by typing `mypy qemu/`. Signed-off-by: John Snow --- python/mypy.ini | 4 ++++ 1 file changed, 4 insertions(+) create mode 100644 python/mypy.ini diff --git a/python/mypy.ini b/python/mypy.ini new file mode 100644 index 00000000000..7a70eca47c6 --- /dev/null +++ b/python/mypy.ini @@ -0,0 +1,4 @@ +[mypy] +strict = True +python_version = 3.6 +warn_unused_configs = True \ No newline at end of file From patchwork Fri Oct 9 17:51:22 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: John Snow X-Patchwork-Id: 303273 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=-9.5 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 0BC00C433DF for ; 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Fri, 09 Oct 2020 13:51:30 -0400 X-MC-Unique: ENvizNPTNeyvsH0xHMLDFA-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 7254B80B714 for ; Fri, 9 Oct 2020 17:51:29 +0000 (UTC) Received: from scv.redhat.com (ovpn-112-203.rdu2.redhat.com [10.10.112.203]) by smtp.corp.redhat.com (Postfix) with ESMTP id A857D7664F; Fri, 9 Oct 2020 17:51:28 +0000 (UTC) From: John Snow To: qemu-devel@nongnu.org Subject: [PATCH 2/3] python/qemu/qmp.py: re-raise OSError when encountered Date: Fri, 9 Oct 2020 13:51:22 -0400 Message-Id: <20201009175123.249009-3-jsnow@redhat.com> In-Reply-To: <20201009175123.249009-1-jsnow@redhat.com> References: <20201009175123.249009-1-jsnow@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=jsnow@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=216.205.24.124; envelope-from=jsnow@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/10/09 02:34:37 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 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, RCVD_IN_DNSWL_NONE=-0.0001, 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: Kevin Wolf , Eduardo Habkost , Wainer dos Santos Moschetta , Cleber Rosa , Paolo Bonzini , John Snow Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Nested if conditions don't change when the exception block fires; we need to explicitly re-raise the error if we didn't intend to capture and suppress it. Signed-off-by: John Snow Reviewed-by: Philippe Mathieu-Daudé --- python/qemu/qmp.py | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) diff --git a/python/qemu/qmp.py b/python/qemu/qmp.py index d911999da1f..4969e5741cb 100644 --- a/python/qemu/qmp.py +++ b/python/qemu/qmp.py @@ -165,14 +165,15 @@ def __get_events(self, wait: Union[bool, float] = False) -> None: """ # Check for new events regardless and pull them into the cache: - self.__sock.setblocking(False) try: + self.__sock.setblocking(False) self.__json_read() except OSError as err: - if err.errno == errno.EAGAIN: - # No data available - pass - self.__sock.setblocking(True) + # EAGAIN: No data available; not critical + if err.errno != errno.EAGAIN: + raise + finally: + self.__sock.setblocking(True) # Wait for new events, if needed. # if wait is 0.0, this means "no wait" and is also implicitly false. 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Fri, 9 Oct 2020 17:51:30 +0000 (UTC) Received: from scv.redhat.com (ovpn-112-203.rdu2.redhat.com [10.10.112.203]) by smtp.corp.redhat.com (Postfix) with ESMTP id 8477376649; Fri, 9 Oct 2020 17:51:29 +0000 (UTC) From: John Snow To: qemu-devel@nongnu.org Subject: [PATCH 3/3] python/qemu/qmp.py: Fix settimeout operation Date: Fri, 9 Oct 2020 13:51:23 -0400 Message-Id: <20201009175123.249009-4-jsnow@redhat.com> In-Reply-To: <20201009175123.249009-1-jsnow@redhat.com> References: <20201009175123.249009-1-jsnow@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=jsnow@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=216.205.24.124; envelope-from=jsnow@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/10/09 02:34:37 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 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, RCVD_IN_DNSWL_NONE=-0.0001, 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: Kevin Wolf , Eduardo Habkost , Wainer dos Santos Moschetta , Cleber Rosa , Paolo Bonzini , John Snow Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" We enabled callers to interface directly with settimeout, but this reacts poorly with blocking/nonblocking operation; as they are using the same internal mechanism. 1. Whenever we change the blocking mechanism temporarily, always set it back to what it was afterwards. 2. Disallow callers from setting a timeout of "0", which means Non-blocking mode. This is going to create more weird problems than anybody wants, so just forbid it. I opt not to coerce '0' to 'None' to maintain the principal of least surprise in mirroring the semantics of Python's interface. Signed-off-by: John Snow Reviewed-by: Philippe Mathieu-Daudé --- python/qemu/qmp.py | 23 +++++++++++++++++------ 1 file changed, 17 insertions(+), 6 deletions(-) diff --git a/python/qemu/qmp.py b/python/qemu/qmp.py index 4969e5741cb..f64517fb0a7 100644 --- a/python/qemu/qmp.py +++ b/python/qemu/qmp.py @@ -164,16 +164,19 @@ def __get_events(self, wait: Union[bool, float] = False) -> None: retrieved or if some other error occurred. """ + # Current timeout and blocking status + current_timeout = self.__sock.gettimeout() + # Check for new events regardless and pull them into the cache: try: - self.__sock.setblocking(False) + self.__sock.settimeout(0) # i.e. setblocking(False) self.__json_read() except OSError as err: # EAGAIN: No data available; not critical if err.errno != errno.EAGAIN: raise finally: - self.__sock.setblocking(True) + self.__sock.settimeout(current_timeout) # Wait for new events, if needed. # if wait is 0.0, this means "no wait" and is also implicitly false. @@ -187,9 +190,11 @@ def __get_events(self, wait: Union[bool, float] = False) -> None: except Exception as err: msg = "Error while reading from socket" raise QMPConnectError(msg) from err + finally: + self.__sock.settimeout(current_timeout) + if ret is None: raise QMPConnectError("Error while reading from socket") - self.__sock.settimeout(None) def __enter__(self) -> 'QEMUMonitorProtocol': # Implement context manager enter function. @@ -219,7 +224,7 @@ def connect(self, negotiate: bool = True) -> Optional[QMPMessage]: return self.__negotiate_capabilities() return None - def accept(self, timeout: float = 15.0) -> QMPMessage: + def accept(self, timeout: Optional[float] = 15.0) -> QMPMessage: """ Await connection from QMP Monitor and perform capabilities negotiation. @@ -338,13 +343,19 @@ def close(self) -> None: if self.__sockfile: self.__sockfile.close() - def settimeout(self, timeout: float) -> None: + def settimeout(self, timeout: Optional[float]) -> None: """ Set the socket timeout. - @param timeout (float): timeout in seconds, or None. + @param timeout (float): timeout in seconds (non-zero), or None. @note This is a wrap around socket.settimeout + + @raise ValueError: if timeout was set to 0. """ + if timeout == 0: + msg = "timeout cannot be 0; this engages non-blocking mode." + msg += " Use 'None' instead to disable timeouts." + raise ValueError(msg) self.__sock.settimeout(timeout) def get_sock_fd(self) -> int: