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Thu, 24 Sep 2020 15:27:33 +0000 (UTC) Received: from linux.fritz.box.com (ovpn-114-72.ams2.redhat.com [10.36.114.72]) by smtp.corp.redhat.com (Postfix) with ESMTP id BA97560C15; Thu, 24 Sep 2020 15:27:31 +0000 (UTC) From: Kevin Wolf To: qemu-block@nongnu.org Subject: [PATCH v2 01/31] nbd: Remove unused nbd_export_get_blockdev() Date: Thu, 24 Sep 2020 17:26:47 +0200 Message-Id: <20200924152717.287415-2-kwolf@redhat.com> In-Reply-To: <20200924152717.287415-1-kwolf@redhat.com> References: <20200924152717.287415-1-kwolf@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=kwolf@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=216.205.24.124; envelope-from=kwolf@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/09/22 23:02:20 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -32 X-Spam_score: -3.3 X-Spam_bar: --- X-Spam_report: (-3.3 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1.199, 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_H5=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: kwolf@redhat.com, qemu-devel@nongnu.org, stefanha@redhat.com, mreitz@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Signed-off-by: Kevin Wolf Reviewed-by: Max Reitz Reviewed-by: Eric Blake --- include/block/nbd.h | 2 -- nbd/server.c | 5 ----- 2 files changed, 7 deletions(-) diff --git a/include/block/nbd.h b/include/block/nbd.h index 9bc3bfaeec..0451683d03 100644 --- a/include/block/nbd.h +++ b/include/block/nbd.h @@ -338,8 +338,6 @@ void nbd_export_remove(NBDExport *exp, NbdServerRemoveMode mode, Error **errp); void nbd_export_get(NBDExport *exp); void nbd_export_put(NBDExport *exp); -BlockBackend *nbd_export_get_blockdev(NBDExport *exp); - AioContext *nbd_export_aio_context(NBDExport *exp); NBDExport *nbd_export_find(const char *name); void nbd_export_close_all(void); diff --git a/nbd/server.c b/nbd/server.c index 982de67816..bd53f7baea 100644 --- a/nbd/server.c +++ b/nbd/server.c @@ -1731,11 +1731,6 @@ void nbd_export_put(NBDExport *exp) } } -BlockBackend *nbd_export_get_blockdev(NBDExport *exp) -{ - return exp->blk; -} - void nbd_export_close_all(void) { NBDExport *exp, *next; From patchwork Thu Sep 24 15:26:48 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kevin Wolf X-Patchwork-Id: 272827 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 B704DC4363D for ; 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Thu, 24 Sep 2020 11:27:35 -0400 X-MC-Unique: U00--5WPNfeHE2gQQR_0iw-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id C451888EF38; Thu, 24 Sep 2020 15:27:34 +0000 (UTC) Received: from linux.fritz.box.com (ovpn-114-72.ams2.redhat.com [10.36.114.72]) by smtp.corp.redhat.com (Postfix) with ESMTP id 682AB60C15; Thu, 24 Sep 2020 15:27:33 +0000 (UTC) From: Kevin Wolf To: qemu-block@nongnu.org Subject: [PATCH v2 02/31] qapi: Create block-export module Date: Thu, 24 Sep 2020 17:26:48 +0200 Message-Id: <20200924152717.287415-3-kwolf@redhat.com> In-Reply-To: <20200924152717.287415-1-kwolf@redhat.com> References: <20200924152717.287415-1-kwolf@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=kwolf@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=216.205.24.124; envelope-from=kwolf@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/09/22 23:02:20 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -32 X-Spam_score: -3.3 X-Spam_bar: --- X-Spam_report: (-3.3 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1.199, 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_H5=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: kwolf@redhat.com, qemu-devel@nongnu.org, stefanha@redhat.com, mreitz@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Move all block export related types and commands from block-core to the new QAPI module block-export. Signed-off-by: Kevin Wolf Reviewed-by: Max Reitz Reviewed-by: Eric Blake --- qapi/block-core.json | 166 ------------------------- qapi/block-export.json | 175 +++++++++++++++++++++++++++ qapi/qapi-schema.json | 1 + include/block/nbd.h | 2 +- block/monitor/block-hmp-cmds.c | 1 + blockdev-nbd.c | 2 +- storage-daemon/qemu-storage-daemon.c | 2 +- qapi/meson.build | 4 +- storage-daemon/qapi/qapi-schema.json | 1 + 9 files changed, 184 insertions(+), 170 deletions(-) create mode 100644 qapi/block-export.json diff --git a/qapi/block-core.json b/qapi/block-core.json index 3c16f1e11d..d620bd1302 100644 --- a/qapi/block-core.json +++ b/qapi/block-core.json @@ -5192,172 +5192,6 @@ 'iothread': 'StrOrNull', '*force': 'bool' } } -## -# @NbdServerOptions: -# -# @addr: Address on which to listen. -# @tls-creds: ID of the TLS credentials object (since 2.6). -# @tls-authz: ID of the QAuthZ authorization object used to validate -# the client's x509 distinguished name. This object is -# is only resolved at time of use, so can be deleted and -# recreated on the fly while the NBD server is active. -# If missing, it will default to denying access (since 4.0). -# -# Keep this type consistent with the nbd-server-start arguments. The only -# intended difference is using SocketAddress instead of SocketAddressLegacy. -# -# Since: 4.2 -## -{ 'struct': 'NbdServerOptions', - 'data': { 'addr': 'SocketAddress', - '*tls-creds': 'str', - '*tls-authz': 'str'} } - -## -# @nbd-server-start: -# -# Start an NBD server listening on the given host and port. Block -# devices can then be exported using @nbd-server-add. The NBD -# server will present them as named exports; for example, another -# QEMU instance could refer to them as "nbd:HOST:PORT:exportname=NAME". -# -# Keep this type consistent with the NbdServerOptions type. The only intended -# difference is using SocketAddressLegacy instead of SocketAddress. -# -# @addr: Address on which to listen. -# @tls-creds: ID of the TLS credentials object (since 2.6). -# @tls-authz: ID of the QAuthZ authorization object used to validate -# the client's x509 distinguished name. This object is -# is only resolved at time of use, so can be deleted and -# recreated on the fly while the NBD server is active. -# If missing, it will default to denying access (since 4.0). -# -# Returns: error if the server is already running. -# -# Since: 1.3.0 -## -{ 'command': 'nbd-server-start', - 'data': { 'addr': 'SocketAddressLegacy', - '*tls-creds': 'str', - '*tls-authz': 'str'} } - -## -# @BlockExportNbd: -# -# An NBD block export. -# -# @device: The device name or node name of the node to be exported -# -# @name: Export name. If unspecified, the @device parameter is used as the -# export name. (Since 2.12) -# -# @description: Free-form description of the export, up to 4096 bytes. -# (Since 5.0) -# -# @writable: Whether clients should be able to write to the device via the -# NBD connection (default false). -# -# @bitmap: Also export the dirty bitmap reachable from @device, so the -# NBD client can use NBD_OPT_SET_META_CONTEXT with -# "qemu:dirty-bitmap:NAME" to inspect the bitmap. (since 4.0) -# -# Since: 5.0 -## -{ 'struct': 'BlockExportNbd', - 'data': {'device': 'str', '*name': 'str', '*description': 'str', - '*writable': 'bool', '*bitmap': 'str' } } - -## -# @nbd-server-add: -# -# Export a block node to QEMU's embedded NBD server. -# -# Returns: error if the server is not running, or export with the same name -# already exists. -# -# Since: 1.3.0 -## -{ 'command': 'nbd-server-add', - 'data': 'BlockExportNbd', 'boxed': true } - -## -# @NbdServerRemoveMode: -# -# Mode for removing an NBD export. -# -# @safe: Remove export if there are no existing connections, fail otherwise. -# -# @hard: Drop all connections immediately and remove export. -# -# Potential additional modes to be added in the future: -# -# hide: Just hide export from new clients, leave existing connections as is. -# Remove export after all clients are disconnected. -# -# soft: Hide export from new clients, answer with ESHUTDOWN for all further -# requests from existing clients. -# -# Since: 2.12 -## -{'enum': 'NbdServerRemoveMode', 'data': ['safe', 'hard']} - -## -# @nbd-server-remove: -# -# Remove NBD export by name. -# -# @name: Export name. -# -# @mode: Mode of command operation. See @NbdServerRemoveMode description. -# Default is 'safe'. -# -# Returns: error if -# - the server is not running -# - export is not found -# - mode is 'safe' and there are existing connections -# -# Since: 2.12 -## -{ 'command': 'nbd-server-remove', - 'data': {'name': 'str', '*mode': 'NbdServerRemoveMode'} } - -## -# @nbd-server-stop: -# -# Stop QEMU's embedded NBD server, and unregister all devices previously -# added via @nbd-server-add. -# -# Since: 1.3.0 -## -{ 'command': 'nbd-server-stop' } - -## -# @BlockExportType: -# -# An enumeration of block export types -# -# @nbd: NBD export -# -# Since: 4.2 -## -{ 'enum': 'BlockExportType', - 'data': [ 'nbd' ] } - -## -# @BlockExport: -# -# Describes a block export, i.e. how single node should be exported on an -# external interface. -# -# Since: 4.2 -## -{ 'union': 'BlockExport', - 'base': { 'type': 'BlockExportType' }, - 'discriminator': 'type', - 'data': { - 'nbd': 'BlockExportNbd' - } } - ## # @QuorumOpType: # diff --git a/qapi/block-export.json b/qapi/block-export.json new file mode 100644 index 0000000000..f799fef36d --- /dev/null +++ b/qapi/block-export.json @@ -0,0 +1,175 @@ +# -*- Mode: Python -*- +# vim: filetype=python + +## +# == Block device exports +## + +{ 'include': 'sockets.json' } + +## +# @NbdServerOptions: +# +# Keep this type consistent with the nbd-server-start arguments. The only +# intended difference is using SocketAddress instead of SocketAddressLegacy. +# +# @addr: Address on which to listen. +# @tls-creds: ID of the TLS credentials object (since 2.6). +# @tls-authz: ID of the QAuthZ authorization object used to validate +# the client's x509 distinguished name. This object is +# is only resolved at time of use, so can be deleted and +# recreated on the fly while the NBD server is active. +# If missing, it will default to denying access (since 4.0). +# +# Since: 4.2 +## +{ 'struct': 'NbdServerOptions', + 'data': { 'addr': 'SocketAddress', + '*tls-creds': 'str', + '*tls-authz': 'str'} } + +## +# @nbd-server-start: +# +# Start an NBD server listening on the given host and port. Block +# devices can then be exported using @nbd-server-add. The NBD +# server will present them as named exports; for example, another +# QEMU instance could refer to them as "nbd:HOST:PORT:exportname=NAME". +# +# @addr: Address on which to listen. +# @tls-creds: ID of the TLS credentials object (since 2.6). +# @tls-authz: ID of the QAuthZ authorization object used to validate +# the client's x509 distinguished name. This object is +# is only resolved at time of use, so can be deleted and +# recreated on the fly while the NBD server is active. +# If missing, it will default to denying access (since 4.0). +# +# Returns: error if the server is already running. +# +# Keep this type consistent with the NbdServerOptions type. The only intended +# difference is using SocketAddressLegacy instead of SocketAddress. +# +# Since: 1.3.0 +## +{ 'command': 'nbd-server-start', + 'data': { 'addr': 'SocketAddressLegacy', + '*tls-creds': 'str', + '*tls-authz': 'str'} } + +## +# @BlockExportNbd: +# +# An NBD block export. +# +# @device: The device name or node name of the node to be exported +# +# @name: Export name. If unspecified, the @device parameter is used as the +# export name. (Since 2.12) +# +# @description: Free-form description of the export, up to 4096 bytes. +# (Since 5.0) +# +# @writable: Whether clients should be able to write to the device via the +# NBD connection (default false). +# +# @bitmap: Also export the dirty bitmap reachable from @device, so the +# NBD client can use NBD_OPT_SET_META_CONTEXT with +# "qemu:dirty-bitmap:NAME" to inspect the bitmap. (since 4.0) +# +# Since: 5.0 +## +{ 'struct': 'BlockExportNbd', + 'data': {'device': 'str', '*name': 'str', '*description': 'str', + '*writable': 'bool', '*bitmap': 'str' } } + +## +# @nbd-server-add: +# +# Export a block node to QEMU's embedded NBD server. +# +# Returns: error if the server is not running, or export with the same name +# already exists. +# +# Since: 1.3.0 +## +{ 'command': 'nbd-server-add', + 'data': 'BlockExportNbd', 'boxed': true } + +## +# @NbdServerRemoveMode: +# +# Mode for removing an NBD export. +# +# @safe: Remove export if there are no existing connections, fail otherwise. +# +# @hard: Drop all connections immediately and remove export. +# +# Potential additional modes to be added in the future: +# +# hide: Just hide export from new clients, leave existing connections as is. +# Remove export after all clients are disconnected. +# +# soft: Hide export from new clients, answer with ESHUTDOWN for all further +# requests from existing clients. +# +# Since: 2.12 +## +{'enum': 'NbdServerRemoveMode', 'data': ['safe', 'hard']} + +## +# @nbd-server-remove: +# +# Remove NBD export by name. +# +# @name: Export name. +# +# @mode: Mode of command operation. See @NbdServerRemoveMode description. +# Default is 'safe'. +# +# Returns: error if +# - the server is not running +# - export is not found +# - mode is 'safe' and there are existing connections +# +# Since: 2.12 +## +{ 'command': 'nbd-server-remove', + 'data': {'name': 'str', '*mode': 'NbdServerRemoveMode'} } + +## +# @nbd-server-stop: +# +# Stop QEMU's embedded NBD server, and unregister all devices previously +# added via @nbd-server-add. +# +# Since: 1.3.0 +## +{ 'command': 'nbd-server-stop' } + +## +# @BlockExportType: +# +# An enumeration of block export types +# +# @nbd: NBD export +# +# Since: 4.2 +## +{ 'enum': 'BlockExportType', + 'data': [ 'nbd' ] } + +## +# @BlockExport: +# +# Describes a block export, i.e. how single node should be exported on an +# external interface. +# +# Since: 4.2 +## +{ 'union': 'BlockExport', + 'base': { 'type': 'BlockExportType' }, + 'discriminator': 'type', + 'data': { + 'nbd': 'BlockExportNbd' + } } + diff --git a/qapi/qapi-schema.json b/qapi/qapi-schema.json index f03ff91ceb..b78fc399a4 100644 --- a/qapi/qapi-schema.json +++ b/qapi/qapi-schema.json @@ -64,6 +64,7 @@ { 'include': 'run-state.json' } { 'include': 'crypto.json' } { 'include': 'block.json' } +{ 'include': 'block-export.json' } { 'include': 'char.json' } { 'include': 'dump.json' } { 'include': 'job.json' } diff --git a/include/block/nbd.h b/include/block/nbd.h index 0451683d03..262f6da2ce 100644 --- a/include/block/nbd.h +++ b/include/block/nbd.h @@ -20,7 +20,7 @@ #ifndef NBD_H #define NBD_H -#include "qapi/qapi-types-block.h" +#include "qapi/qapi-types-block-export.h" #include "io/channel-socket.h" #include "crypto/tlscreds.h" #include "qapi/error.h" diff --git a/block/monitor/block-hmp-cmds.c b/block/monitor/block-hmp-cmds.c index 4d3db5ed3c..6ce0f8f87c 100644 --- a/block/monitor/block-hmp-cmds.c +++ b/block/monitor/block-hmp-cmds.c @@ -40,6 +40,7 @@ #include "sysemu/block-backend.h" #include "sysemu/blockdev.h" #include "qapi/qapi-commands-block.h" +#include "qapi/qapi-commands-block-export.h" #include "qapi/qmp/qdict.h" #include "qapi/error.h" #include "qapi/qmp/qerror.h" diff --git a/blockdev-nbd.c b/blockdev-nbd.c index 1a95d89f00..0f6b80c58f 100644 --- a/blockdev-nbd.c +++ b/blockdev-nbd.c @@ -14,7 +14,7 @@ #include "sysemu/block-backend.h" #include "hw/block/block.h" #include "qapi/error.h" -#include "qapi/qapi-commands-block.h" +#include "qapi/qapi-commands-block-export.h" #include "block/nbd.h" #include "io/channel-socket.h" #include "io/net-listener.h" diff --git a/storage-daemon/qemu-storage-daemon.c b/storage-daemon/qemu-storage-daemon.c index 7e9b0e0d3f..ed9d2afcf3 100644 --- a/storage-daemon/qemu-storage-daemon.c +++ b/storage-daemon/qemu-storage-daemon.c @@ -35,8 +35,8 @@ #include "monitor/monitor-internal.h" #include "qapi/error.h" -#include "qapi/qapi-visit-block.h" #include "qapi/qapi-visit-block-core.h" +#include "qapi/qapi-visit-block-export.h" #include "qapi/qapi-visit-control.h" #include "qapi/qmp/qdict.h" #include "qapi/qmp/qstring.h" diff --git a/qapi/meson.build b/qapi/meson.build index 2b2872a41d..1ee19a07de 100644 --- a/qapi/meson.build +++ b/qapi/meson.build @@ -16,8 +16,9 @@ util_ss.add(files( qapi_all_modules = [ 'audio', 'authz', - 'block-core', 'block', + 'block-core', + 'block-export', 'char', 'common', 'control', @@ -47,6 +48,7 @@ qapi_all_modules = [ qapi_storage_daemon_modules = [ 'block-core', + 'block-export', 'char', 'common', 'control', diff --git a/storage-daemon/qapi/qapi-schema.json b/storage-daemon/qapi/qapi-schema.json index 6100d1f0c9..c6ad5ae1e3 100644 --- a/storage-daemon/qapi/qapi-schema.json +++ b/storage-daemon/qapi/qapi-schema.json @@ -16,6 +16,7 @@ { 'include': '../../qapi/pragma.json' } { 'include': '../../qapi/block-core.json' } +{ 'include': '../../qapi/block-export.json' } { 'include': '../../qapi/char.json' } { 'include': '../../qapi/common.json' } { 'include': '../../qapi/control.json' } From patchwork Thu Sep 24 15:26:49 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kevin Wolf X-Patchwork-Id: 304507 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 0ABEBC4346E for ; Thu, 24 Sep 2020 15:38:23 +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 53EE0221EB for ; Thu, 24 Sep 2020 15:38:22 +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="R9h55pzi" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 53EE0221EB 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]:51390 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kLTK9-0006vG-1z for qemu-devel@archiver.kernel.org; Thu, 24 Sep 2020 11:38:21 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:48592) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kLT9v-0000hc-Ad for qemu-devel@nongnu.org; Thu, 24 Sep 2020 11:27:47 -0400 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:35734) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1kLT9p-0005O4-Cs for qemu-devel@nongnu.org; Thu, 24 Sep 2020 11:27:47 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1600961260; 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=zKwekwhG+MXY7BhbvtEWuVlk8ct682Jx0yFPYlLZ83A=; b=R9h55pziF8X7Vm4OOG7rXH5MBM4c3+K4EkQD0hRG8DNcMxFukQwTHSbl2syS8jMnBtBov3 +16yGZYIv+w5wYQpT4cyoXWs8fgP/7GPc8a0aZet9s7F6ov8nfzBgegS+Z+z6UY40IYGWQ BELyNsLJyF+IrT/Hku4LMgfwMWHMpaU= 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-355-Oz8flmJ6N_OMelH2a4GTVA-1; Thu, 24 Sep 2020 11:27:37 -0400 X-MC-Unique: Oz8flmJ6N_OMelH2a4GTVA-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 5B8C8104D3E3; Thu, 24 Sep 2020 15:27:36 +0000 (UTC) Received: from linux.fritz.box.com (ovpn-114-72.ams2.redhat.com [10.36.114.72]) by smtp.corp.redhat.com (Postfix) with ESMTP id 199CA6716C; Thu, 24 Sep 2020 15:27:34 +0000 (UTC) From: Kevin Wolf To: qemu-block@nongnu.org Subject: [PATCH v2 03/31] qapi: Rename BlockExport to BlockExportOptions Date: Thu, 24 Sep 2020 17:26:49 +0200 Message-Id: <20200924152717.287415-4-kwolf@redhat.com> In-Reply-To: <20200924152717.287415-1-kwolf@redhat.com> References: <20200924152717.287415-1-kwolf@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=kwolf@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=216.205.24.124; envelope-from=kwolf@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/09/22 23:02:20 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -32 X-Spam_score: -3.3 X-Spam_bar: --- X-Spam_report: (-3.3 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1.199, 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_H5=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: kwolf@redhat.com, qemu-devel@nongnu.org, stefanha@redhat.com, mreitz@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" The name BlockExport will be used for the struct containing the runtime state of block exports, so change the name of export creation options. Signed-off-by: Kevin Wolf Reviewed-by: Max Reitz Reviewed-by: Eric Blake --- qapi/block-export.json | 12 ++++++------ block/monitor/block-hmp-cmds.c | 6 +++--- blockdev-nbd.c | 2 +- storage-daemon/qemu-storage-daemon.c | 8 ++++---- 4 files changed, 14 insertions(+), 14 deletions(-) diff --git a/qapi/block-export.json b/qapi/block-export.json index f799fef36d..d540bcb25a 100644 --- a/qapi/block-export.json +++ b/qapi/block-export.json @@ -57,7 +57,7 @@ '*tls-authz': 'str'} } ## -# @BlockExportNbd: +# @BlockExportOptionsNbd: # # An NBD block export. # @@ -78,7 +78,7 @@ # # Since: 5.0 ## -{ 'struct': 'BlockExportNbd', +{ 'struct': 'BlockExportOptionsNbd', 'data': {'device': 'str', '*name': 'str', '*description': 'str', '*writable': 'bool', '*bitmap': 'str' } } @@ -93,7 +93,7 @@ # Since: 1.3.0 ## { 'command': 'nbd-server-add', - 'data': 'BlockExportNbd', 'boxed': true } + 'data': 'BlockExportOptionsNbd', 'boxed': true } ## # @NbdServerRemoveMode: @@ -159,17 +159,17 @@ 'data': [ 'nbd' ] } ## -# @BlockExport: +# @BlockExportOptions: # # Describes a block export, i.e. how single node should be exported on an # external interface. # # Since: 4.2 ## -{ 'union': 'BlockExport', +{ 'union': 'BlockExportOptions', 'base': { 'type': 'BlockExportType' }, 'discriminator': 'type', 'data': { - 'nbd': 'BlockExportNbd' + 'nbd': 'BlockExportOptionsNbd' } } diff --git a/block/monitor/block-hmp-cmds.c b/block/monitor/block-hmp-cmds.c index 6ce0f8f87c..fb632b1189 100644 --- a/block/monitor/block-hmp-cmds.c +++ b/block/monitor/block-hmp-cmds.c @@ -398,7 +398,7 @@ void hmp_nbd_server_start(Monitor *mon, const QDict *qdict) Error *local_err = NULL; BlockInfoList *block_list, *info; SocketAddress *addr; - BlockExportNbd export; + BlockExportOptionsNbd export; if (writable && !all) { error_setg(&local_err, "-w only valid together with -a"); @@ -431,7 +431,7 @@ void hmp_nbd_server_start(Monitor *mon, const QDict *qdict) continue; } - export = (BlockExportNbd) { + export = (BlockExportOptionsNbd) { .device = info->value->device, .has_writable = true, .writable = writable, @@ -458,7 +458,7 @@ void hmp_nbd_server_add(Monitor *mon, const QDict *qdict) bool writable = qdict_get_try_bool(qdict, "writable", false); Error *local_err = NULL; - BlockExportNbd export = { + BlockExportOptionsNbd export = { .device = (char *) device, .has_name = !!name, .name = (char *) name, diff --git a/blockdev-nbd.c b/blockdev-nbd.c index 0f6b80c58f..98ee1b6170 100644 --- a/blockdev-nbd.c +++ b/blockdev-nbd.c @@ -148,7 +148,7 @@ void qmp_nbd_server_start(SocketAddressLegacy *addr, qapi_free_SocketAddress(addr_flat); } -void qmp_nbd_server_add(BlockExportNbd *arg, Error **errp) +void qmp_nbd_server_add(BlockExportOptionsNbd *arg, Error **errp) { BlockDriverState *bs = NULL; BlockBackend *on_eject_blk; diff --git a/storage-daemon/qemu-storage-daemon.c b/storage-daemon/qemu-storage-daemon.c index ed9d2afcf3..ed26097254 100644 --- a/storage-daemon/qemu-storage-daemon.c +++ b/storage-daemon/qemu-storage-daemon.c @@ -150,7 +150,7 @@ static void init_qmp_commands(void) qmp_marshal_qmp_capabilities, QCO_ALLOW_PRECONFIG); } -static void init_export(BlockExport *export, Error **errp) +static void init_export(BlockExportOptions *export, Error **errp) { switch (export->type) { case BLOCK_EXPORT_TYPE_NBD: @@ -235,14 +235,14 @@ static void process_options(int argc, char *argv[]) case OPTION_EXPORT: { Visitor *v; - BlockExport *export; + BlockExportOptions *export; v = qobject_input_visitor_new_str(optarg, "type", &error_fatal); - visit_type_BlockExport(v, NULL, &export, &error_fatal); + visit_type_BlockExportOptions(v, NULL, &export, &error_fatal); visit_free(v); init_export(export, &error_fatal); - qapi_free_BlockExport(export); + qapi_free_BlockExportOptions(export); break; } case OPTION_MONITOR: From patchwork Thu Sep 24 15:26:50 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kevin Wolf X-Patchwork-Id: 304499 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 D81FCC4363D for ; Thu, 24 Sep 2020 16:04:39 +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 2F4FF235FD for ; Thu, 24 Sep 2020 16:04:39 +0000 (UTC) Authentication-Results: mail.kernel.org; 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Thu, 24 Sep 2020 15:27:40 +0000 (UTC) Received: from linux.fritz.box.com (ovpn-114-72.ams2.redhat.com [10.36.114.72]) by smtp.corp.redhat.com (Postfix) with ESMTP id 5985368433; Thu, 24 Sep 2020 15:27:36 +0000 (UTC) From: Kevin Wolf To: qemu-block@nongnu.org Subject: [PATCH v2 04/31] block/export: Add BlockExport infrastructure and block-export-add Date: Thu, 24 Sep 2020 17:26:50 +0200 Message-Id: <20200924152717.287415-5-kwolf@redhat.com> In-Reply-To: <20200924152717.287415-1-kwolf@redhat.com> References: <20200924152717.287415-1-kwolf@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=kwolf@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=216.205.24.124; envelope-from=kwolf@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/09/22 23:02:20 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -32 X-Spam_score: -3.3 X-Spam_bar: --- X-Spam_report: (-3.3 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1.199, 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_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable 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: kwolf@redhat.com, qemu-devel@nongnu.org, stefanha@redhat.com, mreitz@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" We want to have a common set of commands for all types of block exports. Currently, this is only NBD, but we're going to add more types. This patch adds the basic BlockExport and BlockExportDriver structs and a QMP command block-export-add that creates a new export based on the given BlockExportOptions. qmp_nbd_server_add() becomes a wrapper around qmp_block_export_add(). Signed-off-by: Kevin Wolf Reviewed-by: Max Reitz Reviewed-by: Eric Blake --- qapi/block-export.json | 9 ++++++++ include/block/export.h | 33 +++++++++++++++++++++++++++ include/block/nbd.h | 5 ++++- block/export/export.c | 48 ++++++++++++++++++++++++++++++++++++++++ blockdev-nbd.c | 28 +++++++++++++++++------ nbd/server.c | 15 ++++++++++++- block/export/meson.build | 1 + block/meson.build | 2 ++ meson.build | 2 +- 9 files changed, 133 insertions(+), 10 deletions(-) create mode 100644 include/block/export.h create mode 100644 block/export/export.c create mode 100644 block/export/meson.build diff --git a/qapi/block-export.json b/qapi/block-export.json index d540bcb25a..71c5730bc0 100644 --- a/qapi/block-export.json +++ b/qapi/block-export.json @@ -173,3 +173,12 @@ 'nbd': 'BlockExportOptionsNbd' } } +## +# @block-export-add: +# +# Creates a new block export. +# +# Since: 5.2 +## +{ 'command': 'block-export-add', + 'data': 'BlockExportOptions', 'boxed': true } diff --git a/include/block/export.h b/include/block/export.h new file mode 100644 index 0000000000..42e3c055fc --- /dev/null +++ b/include/block/export.h @@ -0,0 +1,33 @@ +/* + * Declarations for block exports + * + * Copyright (c) 2012, 2020 Red Hat, Inc. + * + * Authors: + * Paolo Bonzini + * Kevin Wolf + * + * This work is licensed under the terms of the GNU GPL, version 2 or + * later. See the COPYING file in the top-level directory. + */ + +#ifndef BLOCK_EXPORT_H +#define BLOCK_EXPORT_H + +#include "qapi/qapi-types-block-export.h" + +typedef struct BlockExport BlockExport; + +typedef struct BlockExportDriver { + /* The export type that this driver services */ + BlockExportType type; + + /* Creates and starts a new block export */ + BlockExport *(*create)(BlockExportOptions *, Error **); +} BlockExportDriver; + +struct BlockExport { + const BlockExportDriver *drv; +}; + +#endif diff --git a/include/block/nbd.h b/include/block/nbd.h index 262f6da2ce..7698453fb2 100644 --- a/include/block/nbd.h +++ b/include/block/nbd.h @@ -20,11 +20,13 @@ #ifndef NBD_H #define NBD_H -#include "qapi/qapi-types-block-export.h" +#include "block/export.h" #include "io/channel-socket.h" #include "crypto/tlscreds.h" #include "qapi/error.h" +extern const BlockExportDriver blk_exp_nbd; + /* Handshake phase structs - this struct is passed on the wire */ struct NBDOption { @@ -328,6 +330,7 @@ int nbd_errno_to_system_errno(int err); typedef struct NBDExport NBDExport; typedef struct NBDClient NBDClient; +BlockExport *nbd_export_create(BlockExportOptions *exp_args, Error **errp); NBDExport *nbd_export_new(BlockDriverState *bs, uint64_t dev_offset, uint64_t size, const char *name, const char *desc, const char *bitmap, bool readonly, bool shared, diff --git a/block/export/export.c b/block/export/export.c new file mode 100644 index 0000000000..fd65541963 --- /dev/null +++ b/block/export/export.c @@ -0,0 +1,48 @@ +/* + * Common block export infrastructure + * + * Copyright (c) 2012, 2020 Red Hat, Inc. + * + * Authors: + * Paolo Bonzini + * Kevin Wolf + * + * This work is licensed under the terms of the GNU GPL, version 2 or + * later. See the COPYING file in the top-level directory. + */ + +#include "qemu/osdep.h" + +#include "block/export.h" +#include "block/nbd.h" +#include "qapi/error.h" +#include "qapi/qapi-commands-block-export.h" + +static const BlockExportDriver *blk_exp_drivers[] = { + &blk_exp_nbd, +}; + +static const BlockExportDriver *blk_exp_find_driver(BlockExportType type) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(blk_exp_drivers); i++) { + if (blk_exp_drivers[i]->type == type) { + return blk_exp_drivers[i]; + } + } + return NULL; +} + +void qmp_block_export_add(BlockExportOptions *export, Error **errp) +{ + const BlockExportDriver *drv; + + drv = blk_exp_find_driver(export->type); + if (!drv) { + error_setg(errp, "No driver found for the requested export type"); + return; + } + + drv->create(export, errp); +} diff --git a/blockdev-nbd.c b/blockdev-nbd.c index 98ee1b6170..47b04f166a 100644 --- a/blockdev-nbd.c +++ b/blockdev-nbd.c @@ -148,17 +148,20 @@ void qmp_nbd_server_start(SocketAddressLegacy *addr, qapi_free_SocketAddress(addr_flat); } -void qmp_nbd_server_add(BlockExportOptionsNbd *arg, Error **errp) +BlockExport *nbd_export_create(BlockExportOptions *exp_args, Error **errp) { + BlockExportOptionsNbd *arg = &exp_args->u.nbd; BlockDriverState *bs = NULL; BlockBackend *on_eject_blk; - NBDExport *exp; + NBDExport *exp = NULL; int64_t len; AioContext *aio_context; + assert(exp_args->type == BLOCK_EXPORT_TYPE_NBD); + if (!nbd_server) { error_setg(errp, "NBD server not running"); - return; + return NULL; } if (!arg->has_name) { @@ -167,24 +170,24 @@ void qmp_nbd_server_add(BlockExportOptionsNbd *arg, Error **errp) if (strlen(arg->name) > NBD_MAX_STRING_SIZE) { error_setg(errp, "export name '%s' too long", arg->name); - return; + return NULL; } if (arg->description && strlen(arg->description) > NBD_MAX_STRING_SIZE) { error_setg(errp, "description '%s' too long", arg->description); - return; + return NULL; } if (nbd_export_find(arg->name)) { error_setg(errp, "NBD server already has export named '%s'", arg->name); - return; + return NULL; } on_eject_blk = blk_by_name(arg->device); bs = bdrv_lookup_bs(arg->device, arg->device, errp); if (!bs) { - return; + return NULL; } aio_context = bdrv_get_aio_context(bs); @@ -217,6 +220,17 @@ void qmp_nbd_server_add(BlockExportOptionsNbd *arg, Error **errp) out: aio_context_release(aio_context); + /* TODO Remove the cast: nbd_export_new() will return a BlockExport. */ + return (BlockExport*) exp; +} + +void qmp_nbd_server_add(BlockExportOptionsNbd *arg, Error **errp) +{ + BlockExportOptions export = { + .type = BLOCK_EXPORT_TYPE_NBD, + .u.nbd = *arg, + }; + qmp_block_export_add(&export, errp); } void qmp_nbd_server_remove(const char *name, diff --git a/nbd/server.c b/nbd/server.c index bd53f7baea..f5af93c253 100644 --- a/nbd/server.c +++ b/nbd/server.c @@ -18,6 +18,8 @@ */ #include "qemu/osdep.h" + +#include "block/export.h" #include "qapi/error.h" #include "qemu/queue.h" #include "trace.h" @@ -80,6 +82,7 @@ struct NBDRequestData { }; struct NBDExport { + BlockExport common; int refcount; void (*close)(NBDExport *exp); @@ -1512,10 +1515,15 @@ NBDExport *nbd_export_new(BlockDriverState *bs, uint64_t dev_offset, { AioContext *ctx; BlockBackend *blk; - NBDExport *exp = g_new0(NBDExport, 1); + NBDExport *exp; uint64_t perm; int ret; + exp = g_new0(NBDExport, 1); + exp->common = (BlockExport) { + .drv = &blk_exp_nbd, + }; + /* * NBD exports are used for non-shared storage migration. Make sure * that BDRV_O_INACTIVE is cleared and the image is ready for write @@ -1731,6 +1739,11 @@ void nbd_export_put(NBDExport *exp) } } +const BlockExportDriver blk_exp_nbd = { + .type = BLOCK_EXPORT_TYPE_NBD, + .create = nbd_export_create, +}; + void nbd_export_close_all(void) { NBDExport *exp, *next; diff --git a/block/export/meson.build b/block/export/meson.build new file mode 100644 index 0000000000..558ef35d38 --- /dev/null +++ b/block/export/meson.build @@ -0,0 +1 @@ +block_ss.add(files('export.c')) diff --git a/block/meson.build b/block/meson.build index a3e56b7cd1..0b38dc36f7 100644 --- a/block/meson.build +++ b/block/meson.build @@ -110,6 +110,8 @@ block_ss.add(module_block_h) block_ss.add(files('stream.c')) softmmu_ss.add(files('qapi-sysemu.c')) + +subdir('export') subdir('monitor') modules += {'block': block_modules} diff --git a/meson.build b/meson.build index f4d1ab1096..4c6c7310fa 100644 --- a/meson.build +++ b/meson.build @@ -830,6 +830,7 @@ subdir('dump') block_ss.add(files( 'block.c', + 'blockdev-nbd.c', 'blockjob.c', 'job.c', 'qemu-io-cmds.c', @@ -842,7 +843,6 @@ subdir('block') blockdev_ss.add(files( 'blockdev.c', - 'blockdev-nbd.c', 'iothread.c', 'job-qmp.c', )) From patchwork Thu Sep 24 15:26:51 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kevin Wolf X-Patchwork-Id: 272833 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 266B7C2D0E2 for ; Thu, 24 Sep 2020 15:38:47 +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 7E424221EB for ; Thu, 24 Sep 2020 15:38:46 +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="fbWH3GoQ" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7E424221EB 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]:52244 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kLTKX-0007Gu-E9 for qemu-devel@archiver.kernel.org; Thu, 24 Sep 2020 11:38:45 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:48776) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kLTA7-0001Cw-KP for qemu-devel@nongnu.org; Thu, 24 Sep 2020 11:27:59 -0400 Received: from us-smtp-delivery-124.mimecast.com ([63.128.21.124]:59199) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1kLTA3-0005Ru-Nb for qemu-devel@nongnu.org; Thu, 24 Sep 2020 11:27:59 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1600961274; 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; 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Signed-off-by: Kevin Wolf Reviewed-by: Max Reitz Reviewed-by: Eric Blake --- storage-daemon/qemu-storage-daemon.c | 13 +------------ 1 file changed, 1 insertion(+), 12 deletions(-) diff --git a/storage-daemon/qemu-storage-daemon.c b/storage-daemon/qemu-storage-daemon.c index ed26097254..b6f678d3ab 100644 --- a/storage-daemon/qemu-storage-daemon.c +++ b/storage-daemon/qemu-storage-daemon.c @@ -150,17 +150,6 @@ static void init_qmp_commands(void) qmp_marshal_qmp_capabilities, QCO_ALLOW_PRECONFIG); } -static void init_export(BlockExportOptions *export, Error **errp) -{ - switch (export->type) { - case BLOCK_EXPORT_TYPE_NBD: - qmp_nbd_server_add(&export->u.nbd, errp); - break; - default: - g_assert_not_reached(); - } -} - static void process_options(int argc, char *argv[]) { int c; @@ -241,7 +230,7 @@ static void process_options(int argc, char *argv[]) visit_type_BlockExportOptions(v, NULL, &export, &error_fatal); visit_free(v); - init_export(export, &error_fatal); + qmp_block_export_add(export, &error_fatal); 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Thu, 24 Sep 2020 15:27:43 +0000 (UTC) Received: from linux.fritz.box.com (ovpn-114-72.ams2.redhat.com [10.36.114.72]) by smtp.corp.redhat.com (Postfix) with ESMTP id 7FFEE60C15; Thu, 24 Sep 2020 15:27:42 +0000 (UTC) From: Kevin Wolf To: qemu-block@nongnu.org Subject: [PATCH v2 06/31] qemu-nbd: Use raw block driver for --offset Date: Thu, 24 Sep 2020 17:26:52 +0200 Message-Id: <20200924152717.287415-7-kwolf@redhat.com> In-Reply-To: <20200924152717.287415-1-kwolf@redhat.com> References: <20200924152717.287415-1-kwolf@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=kwolf@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=63.128.21.124; envelope-from=kwolf@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/09/24 01:10:00 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -32 X-Spam_score: -3.3 X-Spam_bar: --- X-Spam_report: (-3.3 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1.199, 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_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable 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: kwolf@redhat.com, qemu-devel@nongnu.org, stefanha@redhat.com, mreitz@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Instead of implementing qemu-nbd --offset in the NBD code, just put a raw block node with the requested offset on top of the user image and rely on that doing the job. This does not only simplify the nbd_export_new() interface and bring it closer to the set of options that the nbd-server-add QMP command offers, but in fact it also eliminates a potential source for bugs in the NBD code which previously had to add the offset manually in all relevant places. Signed-off-by: Kevin Wolf Reviewed-by: Max Reitz Reviewed-by: Eric Blake --- include/block/nbd.h | 4 ++-- blockdev-nbd.c | 9 +-------- nbd/server.c | 33 ++++++++++++++++----------------- qemu-nbd.c | 27 ++++++++++++--------------- 4 files changed, 31 insertions(+), 42 deletions(-) diff --git a/include/block/nbd.h b/include/block/nbd.h index 7698453fb2..451f399b0a 100644 --- a/include/block/nbd.h +++ b/include/block/nbd.h @@ -331,8 +331,8 @@ typedef struct NBDExport NBDExport; typedef struct NBDClient NBDClient; BlockExport *nbd_export_create(BlockExportOptions *exp_args, Error **errp); -NBDExport *nbd_export_new(BlockDriverState *bs, uint64_t dev_offset, - uint64_t size, const char *name, const char *desc, +NBDExport *nbd_export_new(BlockDriverState *bs, + const char *name, const char *desc, const char *bitmap, bool readonly, bool shared, void (*close)(NBDExport *), bool writethrough, BlockBackend *on_eject_blk, Error **errp); diff --git a/blockdev-nbd.c b/blockdev-nbd.c index 47b04f166a..96cb0100e9 100644 --- a/blockdev-nbd.c +++ b/blockdev-nbd.c @@ -154,7 +154,6 @@ BlockExport *nbd_export_create(BlockExportOptions *exp_args, Error **errp) BlockDriverState *bs = NULL; BlockBackend *on_eject_blk; NBDExport *exp = NULL; - int64_t len; AioContext *aio_context; assert(exp_args->type == BLOCK_EXPORT_TYPE_NBD); @@ -192,12 +191,6 @@ BlockExport *nbd_export_create(BlockExportOptions *exp_args, Error **errp) aio_context = bdrv_get_aio_context(bs); aio_context_acquire(aio_context); - len = bdrv_getlength(bs); - if (len < 0) { - error_setg_errno(errp, -len, - "Failed to determine the NBD export's length"); - goto out; - } if (!arg->has_writable) { arg->writable = false; @@ -206,7 +199,7 @@ BlockExport *nbd_export_create(BlockExportOptions *exp_args, Error **errp) arg->writable = false; } - exp = nbd_export_new(bs, 0, len, arg->name, arg->description, arg->bitmap, + exp = nbd_export_new(bs, arg->name, arg->description, arg->bitmap, !arg->writable, !arg->writable, NULL, false, on_eject_blk, errp); if (!exp) { diff --git a/nbd/server.c b/nbd/server.c index f5af93c253..33aaca918c 100644 --- a/nbd/server.c +++ b/nbd/server.c @@ -89,7 +89,6 @@ struct NBDExport { BlockBackend *blk; char *name; char *description; - uint64_t dev_offset; uint64_t size; uint16_t nbdflags; QTAILQ_HEAD(, NBDClient) clients; @@ -1507,8 +1506,8 @@ static void nbd_eject_notifier(Notifier *n, void *data) aio_context_release(aio_context); } -NBDExport *nbd_export_new(BlockDriverState *bs, uint64_t dev_offset, - uint64_t size, const char *name, const char *desc, +NBDExport *nbd_export_new(BlockDriverState *bs, + const char *name, const char *desc, const char *bitmap, bool readonly, bool shared, void (*close)(NBDExport *), bool writethrough, BlockBackend *on_eject_blk, Error **errp) @@ -1516,9 +1515,17 @@ NBDExport *nbd_export_new(BlockDriverState *bs, uint64_t dev_offset, AioContext *ctx; BlockBackend *blk; NBDExport *exp; + int64_t size; uint64_t perm; int ret; + size = bdrv_getlength(bs); + if (size < 0) { + error_setg_errno(errp, -size, + "Failed to determine the NBD export's length"); + return NULL; + } + exp = g_new0(NBDExport, 1); exp->common = (BlockExport) { .drv = &blk_exp_nbd, @@ -1553,8 +1560,6 @@ NBDExport *nbd_export_new(BlockDriverState *bs, uint64_t dev_offset, exp->refcount = 1; QTAILQ_INIT(&exp->clients); exp->blk = blk; - assert(dev_offset <= INT64_MAX); - exp->dev_offset = dev_offset; exp->name = g_strdup(name); assert(!desc || strlen(desc) <= NBD_MAX_STRING_SIZE); exp->description = g_strdup(desc); @@ -1569,7 +1574,6 @@ NBDExport *nbd_export_new(BlockDriverState *bs, uint64_t dev_offset, exp->nbdflags |= (NBD_FLAG_SEND_TRIM | NBD_FLAG_SEND_WRITE_ZEROES | NBD_FLAG_SEND_FAST_ZERO); } - assert(size <= INT64_MAX - dev_offset); exp->size = QEMU_ALIGN_DOWN(size, BDRV_SECTOR_SIZE); if (bitmap) { @@ -1928,8 +1932,7 @@ static int coroutine_fn nbd_co_send_sparse_read(NBDClient *client, stl_be_p(&chunk.length, pnum); ret = nbd_co_send_iov(client, iov, 1, errp); } else { - ret = blk_pread(exp->blk, offset + progress + exp->dev_offset, - data + progress, pnum); + ret = blk_pread(exp->blk, offset + progress, data + progress, pnum); if (ret < 0) { error_setg_errno(errp, -ret, "reading from file failed"); break; @@ -2303,8 +2306,7 @@ static coroutine_fn int nbd_do_cmd_read(NBDClient *client, NBDRequest *request, data, request->len, errp); } - ret = blk_pread(exp->blk, request->from + exp->dev_offset, data, - request->len); + ret = blk_pread(exp->blk, request->from, data, request->len); if (ret < 0) { return nbd_send_generic_reply(client, request->handle, ret, "reading from file failed", errp); @@ -2339,7 +2341,7 @@ static coroutine_fn int nbd_do_cmd_cache(NBDClient *client, NBDRequest *request, assert(request->type == NBD_CMD_CACHE); - ret = blk_co_preadv(exp->blk, request->from + exp->dev_offset, request->len, + ret = blk_co_preadv(exp->blk, request->from, request->len, NULL, BDRV_REQ_COPY_ON_READ | BDRV_REQ_PREFETCH); return nbd_send_generic_reply(client, request->handle, ret, @@ -2370,8 +2372,7 @@ static coroutine_fn int nbd_handle_request(NBDClient *client, if (request->flags & NBD_CMD_FLAG_FUA) { flags |= BDRV_REQ_FUA; } - ret = blk_pwrite(exp->blk, request->from + exp->dev_offset, - data, request->len, flags); + ret = blk_pwrite(exp->blk, request->from, data, request->len, flags); return nbd_send_generic_reply(client, request->handle, ret, "writing to file failed", errp); @@ -2392,8 +2393,7 @@ static coroutine_fn int nbd_handle_request(NBDClient *client, int align = client->check_align ?: 1; int len = MIN(request->len, QEMU_ALIGN_DOWN(BDRV_REQUEST_MAX_BYTES, align)); - ret = blk_pwrite_zeroes(exp->blk, request->from + exp->dev_offset, - len, flags); + ret = blk_pwrite_zeroes(exp->blk, request->from, len, flags); request->len -= len; request->from += len; } @@ -2416,8 +2416,7 @@ static coroutine_fn int nbd_handle_request(NBDClient *client, int align = client->check_align ?: 1; int len = MIN(request->len, QEMU_ALIGN_DOWN(BDRV_REQUEST_MAX_BYTES, align)); - ret = blk_co_pdiscard(exp->blk, request->from + exp->dev_offset, - len); + ret = blk_co_pdiscard(exp->blk, request->from, len); request->len -= len; request->from += len; } diff --git a/qemu-nbd.c b/qemu-nbd.c index 33476a1000..1752daa4c4 100644 --- a/qemu-nbd.c +++ b/qemu-nbd.c @@ -524,7 +524,6 @@ int main(int argc, char **argv) const char *port = NULL; char *sockpath = NULL; char *device = NULL; - int64_t fd_size; QemuOpts *sn_opts = NULL; const char *sn_id_or_name = NULL; const char *sopt = "hVb:o:p:rsnc:dvk:e:f:tl:x:T:D:B:L"; @@ -1037,6 +1036,17 @@ int main(int argc, char **argv) } bs = blk_bs(blk); + if (dev_offset) { + QDict *raw_opts = qdict_new(); + qdict_put_str(raw_opts, "driver", "raw"); + qdict_put_str(raw_opts, "file", bs->node_name); + qdict_put_int(raw_opts, "offset", dev_offset); + bs = bdrv_open(NULL, NULL, raw_opts, flags, &error_fatal); + blk_remove_bs(blk); + blk_insert_bs(blk, bs, &error_fatal); + bdrv_unref(bs); + } + blk_set_enable_write_cache(blk, !writethrough); if (sn_opts) { @@ -1054,21 +1064,8 @@ int main(int argc, char **argv) } bs->detect_zeroes = detect_zeroes; - fd_size = blk_getlength(blk); - if (fd_size < 0) { - error_report("Failed to determine the image length: %s", - strerror(-fd_size)); - exit(EXIT_FAILURE); - } - - if (dev_offset >= fd_size) { - error_report("Offset (%" PRIu64 ") has to be smaller than the image " - "size (%" PRId64 ")", dev_offset, fd_size); - exit(EXIT_FAILURE); - } - fd_size -= dev_offset; - export = nbd_export_new(bs, dev_offset, fd_size, export_name, + export = nbd_export_new(bs, export_name, export_description, bitmap, readonly, shared > 1, nbd_export_closed, writethrough, NULL, &error_fatal); From patchwork Thu Sep 24 15:26:53 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kevin Wolf X-Patchwork-Id: 304497 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 C3EAAC4363D for ; Thu, 24 Sep 2020 16:08:40 +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 2C51A23600 for ; 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Thu, 24 Sep 2020 15:27:45 +0000 (UTC) Received: from linux.fritz.box.com (ovpn-114-72.ams2.redhat.com [10.36.114.72]) by smtp.corp.redhat.com (Postfix) with ESMTP id 1202760C15; Thu, 24 Sep 2020 15:27:43 +0000 (UTC) From: Kevin Wolf To: qemu-block@nongnu.org Subject: [PATCH v2 07/31] block/export: Remove magic from block-export-add Date: Thu, 24 Sep 2020 17:26:53 +0200 Message-Id: <20200924152717.287415-8-kwolf@redhat.com> In-Reply-To: <20200924152717.287415-1-kwolf@redhat.com> References: <20200924152717.287415-1-kwolf@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=kwolf@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=63.128.21.124; envelope-from=kwolf@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/09/24 01:10:00 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -32 X-Spam_score: -3.3 X-Spam_bar: --- X-Spam_report: (-3.3 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1.199, 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_H5=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: kwolf@redhat.com, qemu-devel@nongnu.org, stefanha@redhat.com, mreitz@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" nbd-server-add tries to be convenient and adds two questionable features that we don't want to share in block-export-add, even for NBD exports: 1. When requesting a writable export of a read-only device, the export is silently downgraded to read-only. This should be an error in the context of block-export-add. 2. When using a BlockBackend name, unplugging the device from the guest will automatically stop the NBD server, too. This may sometimes be what you want, but it could also be very surprising. Let's keep things explicit with block-export-add. If the user wants to stop the export, they should tell us so. Move these things into the nbd-server-add QMP command handler so that they apply only there. Signed-off-by: Kevin Wolf Reviewed-by: Max Reitz --- include/block/export.h | 2 ++ include/block/nbd.h | 3 ++- block/export/export.c | 13 +++++++++--- blockdev-nbd.c | 47 +++++++++++++++++++++++++++++++++++------- nbd/server.c | 20 +++++++++++------- qemu-nbd.c | 3 +-- 6 files changed, 67 insertions(+), 21 deletions(-) diff --git a/include/block/export.h b/include/block/export.h index 42e3c055fc..e7af2c7687 100644 --- a/include/block/export.h +++ b/include/block/export.h @@ -30,4 +30,6 @@ struct BlockExport { const BlockExportDriver *drv; }; +BlockExport *blk_exp_add(BlockExportOptions *export, Error **errp); + #endif diff --git a/include/block/nbd.h b/include/block/nbd.h index 451f399b0a..f55f5b710b 100644 --- a/include/block/nbd.h +++ b/include/block/nbd.h @@ -335,7 +335,8 @@ NBDExport *nbd_export_new(BlockDriverState *bs, const char *name, const char *desc, const char *bitmap, bool readonly, bool shared, void (*close)(NBDExport *), bool writethrough, - BlockBackend *on_eject_blk, Error **errp); + Error **errp); +void nbd_export_set_on_eject_blk(BlockExport *exp, BlockBackend *blk); void nbd_export_close(NBDExport *exp); void nbd_export_remove(NBDExport *exp, NbdServerRemoveMode mode, Error **errp); void nbd_export_get(NBDExport *exp); diff --git a/block/export/export.c b/block/export/export.c index fd65541963..05bc5e3744 100644 --- a/block/export/export.c +++ b/block/export/export.c @@ -13,6 +13,8 @@ #include "qemu/osdep.h" +#include "block/block.h" +#include "sysemu/block-backend.h" #include "block/export.h" #include "block/nbd.h" #include "qapi/error.h" @@ -34,15 +36,20 @@ static const BlockExportDriver *blk_exp_find_driver(BlockExportType type) return NULL; } -void qmp_block_export_add(BlockExportOptions *export, Error **errp) +BlockExport *blk_exp_add(BlockExportOptions *export, Error **errp) { const BlockExportDriver *drv; drv = blk_exp_find_driver(export->type); if (!drv) { error_setg(errp, "No driver found for the requested export type"); - return; + return NULL; } - drv->create(export, errp); + return drv->create(export, errp); +} + +void qmp_block_export_add(BlockExportOptions *export, Error **errp) +{ + blk_exp_add(export, errp); } diff --git a/blockdev-nbd.c b/blockdev-nbd.c index 96cb0100e9..7bcca105f9 100644 --- a/blockdev-nbd.c +++ b/blockdev-nbd.c @@ -152,7 +152,6 @@ BlockExport *nbd_export_create(BlockExportOptions *exp_args, Error **errp) { BlockExportOptionsNbd *arg = &exp_args->u.nbd; BlockDriverState *bs = NULL; - BlockBackend *on_eject_blk; NBDExport *exp = NULL; AioContext *aio_context; @@ -182,8 +181,6 @@ BlockExport *nbd_export_create(BlockExportOptions *exp_args, Error **errp) return NULL; } - on_eject_blk = blk_by_name(arg->device); - bs = bdrv_lookup_bs(arg->device, arg->device, errp); if (!bs) { return NULL; @@ -195,13 +192,14 @@ BlockExport *nbd_export_create(BlockExportOptions *exp_args, Error **errp) if (!arg->has_writable) { arg->writable = false; } - if (bdrv_is_read_only(bs)) { - arg->writable = false; + if (bdrv_is_read_only(bs) && arg->writable) { + error_setg(errp, "Cannot export read-only node as writable"); + goto out; } exp = nbd_export_new(bs, arg->name, arg->description, arg->bitmap, !arg->writable, !arg->writable, - NULL, false, on_eject_blk, errp); + NULL, false, errp); if (!exp) { goto out; } @@ -219,11 +217,44 @@ BlockExport *nbd_export_create(BlockExportOptions *exp_args, Error **errp) void qmp_nbd_server_add(BlockExportOptionsNbd *arg, Error **errp) { - BlockExportOptions export = { + BlockExport *export; + BlockDriverState *bs; + BlockBackend *on_eject_blk; + BlockExportOptions export_opts; + + bs = bdrv_lookup_bs(arg->device, arg->device, errp); + if (!bs) { + return; + } + + export_opts = (BlockExportOptions) { .type = BLOCK_EXPORT_TYPE_NBD, .u.nbd = *arg, }; - qmp_block_export_add(&export, errp); + + /* + * nbd-server-add doesn't complain when a read-only device should be + * exported as writable, but simply downgrades it. This is an error with + * block-export-add. + */ + if (bdrv_is_read_only(bs)) { + export_opts.u.nbd.has_writable = true; + export_opts.u.nbd.writable = false; + } + + export = blk_exp_add(&export_opts, errp); + if (!export) { + return; + } + + /* + * nbd-server-add removes the export when the named BlockBackend used for + * @device goes away. + */ + on_eject_blk = blk_by_name(arg->device); + if (on_eject_blk) { + nbd_export_set_on_eject_blk(export, on_eject_blk); + } } void qmp_nbd_server_remove(const char *name, diff --git a/nbd/server.c b/nbd/server.c index 33aaca918c..23d9a53094 100644 --- a/nbd/server.c +++ b/nbd/server.c @@ -1506,11 +1506,23 @@ static void nbd_eject_notifier(Notifier *n, void *data) aio_context_release(aio_context); } +void nbd_export_set_on_eject_blk(BlockExport *exp, BlockBackend *blk) +{ + NBDExport *nbd_exp = container_of(exp, NBDExport, common); + assert(exp->drv == &blk_exp_nbd); + assert(nbd_exp->eject_notifier_blk == NULL); + + blk_ref(blk); + nbd_exp->eject_notifier_blk = blk; + nbd_exp->eject_notifier.notify = nbd_eject_notifier; + blk_add_remove_bs_notifier(blk, &nbd_exp->eject_notifier); +} + NBDExport *nbd_export_new(BlockDriverState *bs, const char *name, const char *desc, const char *bitmap, bool readonly, bool shared, void (*close)(NBDExport *), bool writethrough, - BlockBackend *on_eject_blk, Error **errp) + Error **errp) { AioContext *ctx; BlockBackend *blk; @@ -1617,12 +1629,6 @@ NBDExport *nbd_export_new(BlockDriverState *bs, exp->ctx = ctx; blk_add_aio_context_notifier(blk, blk_aio_attached, blk_aio_detach, exp); - if (on_eject_blk) { - blk_ref(on_eject_blk); - exp->eject_notifier_blk = on_eject_blk; - exp->eject_notifier.notify = nbd_eject_notifier; - blk_add_remove_bs_notifier(on_eject_blk, &exp->eject_notifier); - } QTAILQ_INSERT_TAIL(&exports, exp, next); nbd_export_get(exp); return exp; diff --git a/qemu-nbd.c b/qemu-nbd.c index 1752daa4c4..2bba6c0db3 100644 --- a/qemu-nbd.c +++ b/qemu-nbd.c @@ -1067,8 +1067,7 @@ int main(int argc, char **argv) export = nbd_export_new(bs, export_name, export_description, bitmap, readonly, shared > 1, - nbd_export_closed, writethrough, NULL, - &error_fatal); + nbd_export_closed, writethrough, &error_fatal); if (device) { #if HAVE_NBD_DEVICE From patchwork Thu Sep 24 15:26:54 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kevin Wolf X-Patchwork-Id: 272832 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 6983AC4346E for ; Thu, 24 Sep 2020 15:44:09 +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 D3E092220C for ; 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Thu, 24 Sep 2020 15:27:46 +0000 (UTC) Received: from linux.fritz.box.com (ovpn-114-72.ams2.redhat.com [10.36.114.72]) by smtp.corp.redhat.com (Postfix) with ESMTP id 9A6C660C04; Thu, 24 Sep 2020 15:27:45 +0000 (UTC) From: Kevin Wolf To: qemu-block@nongnu.org Subject: [PATCH v2 08/31] nbd: Add max-connections to nbd-server-start Date: Thu, 24 Sep 2020 17:26:54 +0200 Message-Id: <20200924152717.287415-9-kwolf@redhat.com> In-Reply-To: <20200924152717.287415-1-kwolf@redhat.com> References: <20200924152717.287415-1-kwolf@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=kwolf@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=63.128.21.124; envelope-from=kwolf@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/09/24 01:10:00 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -32 X-Spam_score: -3.3 X-Spam_bar: --- X-Spam_report: (-3.3 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1.199, 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_H5=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: kwolf@redhat.com, qemu-devel@nongnu.org, stefanha@redhat.com, mreitz@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" This is a QMP equivalent of qemu-nbd's --shared option, limiting the maximum number of clients that can attach at the same time. Signed-off-by: Kevin Wolf Reviewed-by: Max Reitz Reviewed-by: Eric Blake --- qapi/block-export.json | 10 +++++++-- include/block/nbd.h | 3 ++- block/monitor/block-hmp-cmds.c | 2 +- blockdev-nbd.c | 33 ++++++++++++++++++++++------ storage-daemon/qemu-storage-daemon.c | 4 ++-- 5 files changed, 39 insertions(+), 13 deletions(-) diff --git a/qapi/block-export.json b/qapi/block-export.json index 71c5730bc0..60474bfacd 100644 --- a/qapi/block-export.json +++ b/qapi/block-export.json @@ -20,13 +20,16 @@ # is only resolved at time of use, so can be deleted and # recreated on the fly while the NBD server is active. # If missing, it will default to denying access (since 4.0). +# @max-connections: The maximum number of connections to allow at the same +# time, 0 for unlimited. (since 5.2; default: 0) # # Since: 4.2 ## { 'struct': 'NbdServerOptions', 'data': { 'addr': 'SocketAddress', '*tls-creds': 'str', - '*tls-authz': 'str'} } + '*tls-authz': 'str', + '*max-connections': 'uint32' } } ## # @nbd-server-start: @@ -43,6 +46,8 @@ # is only resolved at time of use, so can be deleted and # recreated on the fly while the NBD server is active. # If missing, it will default to denying access (since 4.0). +# @max-connections: The maximum number of connections to allow at the same +# time, 0 for unlimited. (since 5.2; default: 0) # # Returns: error if the server is already running. # @@ -54,7 +59,8 @@ { 'command': 'nbd-server-start', 'data': { 'addr': 'SocketAddressLegacy', '*tls-creds': 'str', - '*tls-authz': 'str'} } + '*tls-authz': 'str', + '*max-connections': 'uint32' } } ## # @BlockExportOptionsNbd: diff --git a/include/block/nbd.h b/include/block/nbd.h index f55f5b710b..acccdb3180 100644 --- a/include/block/nbd.h +++ b/include/block/nbd.h @@ -354,7 +354,8 @@ void nbd_client_get(NBDClient *client); void nbd_client_put(NBDClient *client); void nbd_server_start(SocketAddress *addr, const char *tls_creds, - const char *tls_authz, Error **errp); + const char *tls_authz, uint32_t max_connections, + Error **errp); void nbd_server_start_options(NbdServerOptions *arg, Error **errp); /* nbd_read diff --git a/block/monitor/block-hmp-cmds.c b/block/monitor/block-hmp-cmds.c index fb632b1189..662b7f7d00 100644 --- a/block/monitor/block-hmp-cmds.c +++ b/block/monitor/block-hmp-cmds.c @@ -411,7 +411,7 @@ void hmp_nbd_server_start(Monitor *mon, const QDict *qdict) goto exit; } - nbd_server_start(addr, NULL, NULL, &local_err); + nbd_server_start(addr, NULL, NULL, 0, &local_err); qapi_free_SocketAddress(addr); if (local_err != NULL) { goto exit; diff --git a/blockdev-nbd.c b/blockdev-nbd.c index 7bcca105f9..41d5542987 100644 --- a/blockdev-nbd.c +++ b/blockdev-nbd.c @@ -23,23 +23,41 @@ typedef struct NBDServerData { QIONetListener *listener; QCryptoTLSCreds *tlscreds; char *tlsauthz; + uint32_t max_connections; + uint32_t connections; } NBDServerData; static NBDServerData *nbd_server; +static void nbd_update_server_watch(NBDServerData *s); + static void nbd_blockdev_client_closed(NBDClient *client, bool ignored) { nbd_client_put(client); + assert(nbd_server->connections > 0); + nbd_server->connections--; + nbd_update_server_watch(nbd_server); } static void nbd_accept(QIONetListener *listener, QIOChannelSocket *cioc, gpointer opaque) { + nbd_server->connections++; + nbd_update_server_watch(nbd_server); + qio_channel_set_name(QIO_CHANNEL(cioc), "nbd-server"); nbd_client_new(cioc, nbd_server->tlscreds, nbd_server->tlsauthz, nbd_blockdev_client_closed); } +static void nbd_update_server_watch(NBDServerData *s) +{ + if (!s->max_connections || s->connections < s->max_connections) { + qio_net_listener_set_client_func(s->listener, nbd_accept, NULL, NULL); + } else { + qio_net_listener_set_client_func(s->listener, NULL, NULL, NULL); + } +} static void nbd_server_free(NBDServerData *server) { @@ -88,7 +106,8 @@ static QCryptoTLSCreds *nbd_get_tls_creds(const char *id, Error **errp) void nbd_server_start(SocketAddress *addr, const char *tls_creds, - const char *tls_authz, Error **errp) + const char *tls_authz, uint32_t max_connections, + Error **errp) { if (nbd_server) { error_setg(errp, "NBD server already running"); @@ -96,6 +115,7 @@ void nbd_server_start(SocketAddress *addr, const char *tls_creds, } nbd_server = g_new0(NBDServerData, 1); + nbd_server->max_connections = max_connections; nbd_server->listener = qio_net_listener_new(); qio_net_listener_set_name(nbd_server->listener, @@ -120,10 +140,7 @@ void nbd_server_start(SocketAddress *addr, const char *tls_creds, nbd_server->tlsauthz = g_strdup(tls_authz); - qio_net_listener_set_client_func(nbd_server->listener, - nbd_accept, - NULL, - NULL); + nbd_update_server_watch(nbd_server); return; @@ -134,17 +151,19 @@ void nbd_server_start(SocketAddress *addr, const char *tls_creds, void nbd_server_start_options(NbdServerOptions *arg, Error **errp) { - nbd_server_start(arg->addr, arg->tls_creds, arg->tls_authz, errp); + nbd_server_start(arg->addr, arg->tls_creds, arg->tls_authz, + arg->max_connections, errp); } void qmp_nbd_server_start(SocketAddressLegacy *addr, bool has_tls_creds, const char *tls_creds, bool has_tls_authz, const char *tls_authz, + bool has_max_connections, uint32_t max_connections, Error **errp) { SocketAddress *addr_flat = socket_address_flatten(addr); - nbd_server_start(addr_flat, tls_creds, tls_authz, errp); + nbd_server_start(addr_flat, tls_creds, tls_authz, max_connections, errp); qapi_free_SocketAddress(addr_flat); } diff --git a/storage-daemon/qemu-storage-daemon.c b/storage-daemon/qemu-storage-daemon.c index b6f678d3ab..0fcab6ed2d 100644 --- a/storage-daemon/qemu-storage-daemon.c +++ b/storage-daemon/qemu-storage-daemon.c @@ -101,9 +101,9 @@ static void help(void) " configure a QMP monitor\n" "\n" " --nbd-server addr.type=inet,addr.host=,addr.port=\n" -" [,tls-creds=][,tls-authz=]\n" +" [,tls-creds=][,tls-authz=][,max-connections=]\n" " --nbd-server addr.type=unix,addr.path=\n" -" [,tls-creds=][,tls-authz=]\n" +" [,tls-creds=][,tls-authz=][,max-connections=]\n" " start an NBD server for exporting block nodes\n" "\n" " --object help list object types that can be added\n" From patchwork Thu Sep 24 15:26:55 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kevin Wolf X-Patchwork-Id: 304505 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 5FA84C4346E for ; Thu, 24 Sep 2020 15:44:13 +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 C069B2220C for ; Thu, 24 Sep 2020 15:44:12 +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="SRMnIQFg" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C069B2220C Authentication-Results: mail.kernel.org; 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bh=nxszKmM5Wy90ybQ5MKZ2Nz488MiNpD4pG4FzUCVCeQ8=; b=SRMnIQFguudLM2KXZGfCU2eB3J7hvItg8OLgJyT1Uw8Rtd4nCYAcmZOb3cKxJcEAq8eE/I OTJ1WlLBzSCVIQBzl60u1IURo2D2d8dwoKZjnMSPPQ/OOP0dGg06Maoq3G6NCIeDPO4M4B OJ6WC4hylNBZ1wrOMqQctFGoLOedmxI= 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-185-5aMXD0-mN8q0S7zy4ImcFA-1; Thu, 24 Sep 2020 11:27:49 -0400 X-MC-Unique: 5aMXD0-mN8q0S7zy4ImcFA-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 761CB871805; Thu, 24 Sep 2020 15:27:48 +0000 (UTC) Received: from linux.fritz.box.com (ovpn-114-72.ams2.redhat.com [10.36.114.72]) by smtp.corp.redhat.com (Postfix) with ESMTP id 2DB8860C04; Thu, 24 Sep 2020 15:27:47 +0000 (UTC) From: Kevin Wolf To: qemu-block@nongnu.org Subject: [PATCH v2 09/31] nbd: Add writethrough to block-export-add Date: Thu, 24 Sep 2020 17:26:55 +0200 Message-Id: <20200924152717.287415-10-kwolf@redhat.com> In-Reply-To: <20200924152717.287415-1-kwolf@redhat.com> References: <20200924152717.287415-1-kwolf@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=kwolf@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=216.205.24.124; envelope-from=kwolf@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/09/22 23:02:20 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -32 X-Spam_score: -3.3 X-Spam_bar: --- X-Spam_report: (-3.3 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1.199, 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_H5=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: kwolf@redhat.com, qemu-devel@nongnu.org, stefanha@redhat.com, mreitz@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" qemu-nbd allows use of writethrough cache modes, which mean that write requests made through NBD will cause a flush before they complete. Expose the same functionality in block-export-add. Signed-off-by: Kevin Wolf Reviewed-by: Max Reitz --- qapi/block-export.json | 7 ++++++- blockdev-nbd.c | 6 +++++- 2 files changed, 11 insertions(+), 2 deletions(-) diff --git a/qapi/block-export.json b/qapi/block-export.json index 60474bfacd..319a38be88 100644 --- a/qapi/block-export.json +++ b/qapi/block-export.json @@ -170,10 +170,15 @@ # Describes a block export, i.e. how single node should be exported on an # external interface. # +# @writethrough: If true, caches are flushed after every write request to the +# export before completion is signalled. (since: 5.2; +# default: false) +# # Since: 4.2 ## { 'union': 'BlockExportOptions', - 'base': { 'type': 'BlockExportType' }, + 'base': { 'type': 'BlockExportType', + '*writethrough': 'bool' }, 'discriminator': 'type', 'data': { 'nbd': 'BlockExportOptionsNbd' diff --git a/blockdev-nbd.c b/blockdev-nbd.c index 41d5542987..09247a8ded 100644 --- a/blockdev-nbd.c +++ b/blockdev-nbd.c @@ -216,9 +216,13 @@ BlockExport *nbd_export_create(BlockExportOptions *exp_args, Error **errp) goto out; } + if (!exp_args->has_writethrough) { + exp_args->writethrough = false; + } + exp = nbd_export_new(bs, arg->name, arg->description, arg->bitmap, !arg->writable, !arg->writable, - NULL, false, errp); + NULL, exp_args->writethrough, errp); if (!exp) { goto out; } From patchwork Thu Sep 24 15:26:56 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kevin Wolf X-Patchwork-Id: 304503 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 43522C4363D for ; 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Thu, 24 Sep 2020 11:28:01 -0400 Received: from us-smtp-delivery-124.mimecast.com ([63.128.21.124]:31952) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1kLTA3-0005Rx-Qf for qemu-devel@nongnu.org; Thu, 24 Sep 2020 11:28:00 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1600961274; 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=hiOZn/0SGsaBNGZym4JYSsMAjWTNHRwz1UJFWPBbByc=; b=NxnbCSFouVYLAb85scWg5h5Je1M5JcI4khYCCyYPQV+2CyvvJKiiQrdPUMioCxU3C5VyNC nbegzc8lrGYa5Pj9yAGW9Qzlev7hgf4AUJEVpu3htdlD1R0/FUIzITa4HB/cMpHVEXzWi8 Lu2EzDzhDFUMy/hpFJ+Nmp68WUshCGg= 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-578-sWEs6HOKMM6FMQlzSGjkkw-1; Thu, 24 Sep 2020 11:27:51 -0400 X-MC-Unique: sWEs6HOKMM6FMQlzSGjkkw-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 0B6041005E7B; Thu, 24 Sep 2020 15:27:50 +0000 (UTC) Received: from linux.fritz.box.com (ovpn-114-72.ams2.redhat.com [10.36.114.72]) by smtp.corp.redhat.com (Postfix) with ESMTP id BD98860C04; Thu, 24 Sep 2020 15:27:48 +0000 (UTC) From: Kevin Wolf To: qemu-block@nongnu.org Subject: [PATCH v2 10/31] nbd: Remove NBDExport.close callback Date: Thu, 24 Sep 2020 17:26:56 +0200 Message-Id: <20200924152717.287415-11-kwolf@redhat.com> In-Reply-To: <20200924152717.287415-1-kwolf@redhat.com> References: <20200924152717.287415-1-kwolf@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=kwolf@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=63.128.21.124; envelope-from=kwolf@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/09/24 01:10:00 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -32 X-Spam_score: -3.3 X-Spam_bar: --- X-Spam_report: (-3.3 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1.199, 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_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable 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: kwolf@redhat.com, qemu-devel@nongnu.org, stefanha@redhat.com, mreitz@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" The export close callback is unused by the built-in NBD server. qemu-nbd uses it only during shutdown to wait for the unrefed export to actually go away. It can just use nbd_export_close_all() instead and do without the callback. This removes the close callback from nbd_export_new() and makes both callers of it more similar. Signed-off-by: Kevin Wolf Reviewed-by: Max Reitz Reviewed-by: Eric Blake --- include/block/nbd.h | 3 +-- blockdev-nbd.c | 2 +- nbd/server.c | 9 +-------- qemu-nbd.c | 14 ++++---------- 4 files changed, 7 insertions(+), 21 deletions(-) diff --git a/include/block/nbd.h b/include/block/nbd.h index acccdb3180..9449b3dac4 100644 --- a/include/block/nbd.h +++ b/include/block/nbd.h @@ -334,8 +334,7 @@ BlockExport *nbd_export_create(BlockExportOptions *exp_args, Error **errp); NBDExport *nbd_export_new(BlockDriverState *bs, const char *name, const char *desc, const char *bitmap, bool readonly, bool shared, - void (*close)(NBDExport *), bool writethrough, - Error **errp); + bool writethrough, Error **errp); void nbd_export_set_on_eject_blk(BlockExport *exp, BlockBackend *blk); void nbd_export_close(NBDExport *exp); void nbd_export_remove(NBDExport *exp, NbdServerRemoveMode mode, Error **errp); diff --git a/blockdev-nbd.c b/blockdev-nbd.c index 09247a8ded..3a51b3e792 100644 --- a/blockdev-nbd.c +++ b/blockdev-nbd.c @@ -222,7 +222,7 @@ BlockExport *nbd_export_create(BlockExportOptions *exp_args, Error **errp) exp = nbd_export_new(bs, arg->name, arg->description, arg->bitmap, !arg->writable, !arg->writable, - NULL, exp_args->writethrough, errp); + exp_args->writethrough, errp); if (!exp) { goto out; } diff --git a/nbd/server.c b/nbd/server.c index 23d9a53094..1cc915f01d 100644 --- a/nbd/server.c +++ b/nbd/server.c @@ -84,7 +84,6 @@ struct NBDRequestData { struct NBDExport { BlockExport common; int refcount; - void (*close)(NBDExport *exp); BlockBackend *blk; char *name; @@ -1521,8 +1520,7 @@ void nbd_export_set_on_eject_blk(BlockExport *exp, BlockBackend *blk) NBDExport *nbd_export_new(BlockDriverState *bs, const char *name, const char *desc, const char *bitmap, bool readonly, bool shared, - void (*close)(NBDExport *), bool writethrough, - Error **errp) + bool writethrough, Error **errp) { AioContext *ctx; BlockBackend *blk; @@ -1625,7 +1623,6 @@ NBDExport *nbd_export_new(BlockDriverState *bs, assert(strlen(exp->export_bitmap_context) < NBD_MAX_STRING_SIZE); } - exp->close = close; exp->ctx = ctx; blk_add_aio_context_notifier(blk, blk_aio_attached, blk_aio_detach, exp); @@ -1723,10 +1720,6 @@ void nbd_export_put(NBDExport *exp) assert(exp->name == NULL); assert(exp->description == NULL); - if (exp->close) { - exp->close(exp); - } - if (exp->blk) { if (exp->eject_notifier_blk) { notifier_remove(&exp->eject_notifier); diff --git a/qemu-nbd.c b/qemu-nbd.c index 2bba6c0db3..cab65529a5 100644 --- a/qemu-nbd.c +++ b/qemu-nbd.c @@ -70,7 +70,7 @@ static int verbose; static char *srcpath; static SocketAddress *saddr; static int persistent = 0; -static enum { RUNNING, TERMINATE, TERMINATING, TERMINATED } state; +static enum { RUNNING, TERMINATE, TERMINATED } state; static int shared = 1; static int nb_fds; static QIONetListener *server; @@ -332,12 +332,6 @@ static int nbd_can_accept(void) return state == RUNNING && nb_fds < shared; } -static void nbd_export_closed(NBDExport *export) -{ - assert(state == TERMINATING); - state = TERMINATED; -} - static void nbd_update_server_watch(void); static void nbd_client_closed(NBDClient *client, bool negotiated) @@ -1067,7 +1061,7 @@ int main(int argc, char **argv) export = nbd_export_new(bs, export_name, export_description, bitmap, readonly, shared > 1, - nbd_export_closed, writethrough, &error_fatal); + writethrough, &error_fatal); if (device) { #if HAVE_NBD_DEVICE @@ -1107,10 +1101,10 @@ int main(int argc, char **argv) do { main_loop_wait(false); if (state == TERMINATE) { - state = TERMINATING; - nbd_export_close(export); nbd_export_put(export); + nbd_export_close_all(); export = NULL; + state = TERMINATED; } } while (state != TERMINATED); From patchwork Thu Sep 24 15:26:57 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kevin Wolf X-Patchwork-Id: 304496 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 0706DC4363D for ; 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Thu, 24 Sep 2020 11:27:52 -0400 X-MC-Unique: FWRfW-o8OH6kOPNloJ1lDQ-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 906B71007388; Thu, 24 Sep 2020 15:27:51 +0000 (UTC) Received: from linux.fritz.box.com (ovpn-114-72.ams2.redhat.com [10.36.114.72]) by smtp.corp.redhat.com (Postfix) with ESMTP id 51E7B60C04; Thu, 24 Sep 2020 15:27:50 +0000 (UTC) From: Kevin Wolf To: qemu-block@nongnu.org Subject: [PATCH v2 11/31] qemu-nbd: Use blk_exp_add() to create the export Date: Thu, 24 Sep 2020 17:26:57 +0200 Message-Id: <20200924152717.287415-12-kwolf@redhat.com> In-Reply-To: <20200924152717.287415-1-kwolf@redhat.com> References: <20200924152717.287415-1-kwolf@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=kwolf@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=63.128.21.124; envelope-from=kwolf@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/09/24 01:10:00 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -32 X-Spam_score: -3.3 X-Spam_bar: --- X-Spam_report: (-3.3 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1.199, 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_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable 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: kwolf@redhat.com, qemu-devel@nongnu.org, stefanha@redhat.com, mreitz@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" With this change, NBD exports are now only created through the BlockExport interface. This allows us finally to move things from the NBD layer to the BlockExport layer if they make sense for other export types, too. blk_exp_add() returns only a weak reference, so the explicit nbd_export_put() goes away. Signed-off-by: Kevin Wolf Reviewed-by: Max Reitz --- include/block/nbd.h | 1 + blockdev-nbd.c | 8 +++++++- qemu-nbd.c | 28 ++++++++++++++++++++++------ 3 files changed, 30 insertions(+), 7 deletions(-) diff --git a/include/block/nbd.h b/include/block/nbd.h index 9449b3dac4..1dafe70615 100644 --- a/include/block/nbd.h +++ b/include/block/nbd.h @@ -352,6 +352,7 @@ void nbd_client_new(QIOChannelSocket *sioc, void nbd_client_get(NBDClient *client); void nbd_client_put(NBDClient *client); +void nbd_server_is_qemu_nbd(bool value); void nbd_server_start(SocketAddress *addr, const char *tls_creds, const char *tls_authz, uint32_t max_connections, Error **errp); diff --git a/blockdev-nbd.c b/blockdev-nbd.c index 3a51b3e792..7bb0b09697 100644 --- a/blockdev-nbd.c +++ b/blockdev-nbd.c @@ -28,9 +28,15 @@ typedef struct NBDServerData { } NBDServerData; static NBDServerData *nbd_server; +static bool is_qemu_nbd; static void nbd_update_server_watch(NBDServerData *s); +void nbd_server_is_qemu_nbd(bool value) +{ + is_qemu_nbd = value; +} + static void nbd_blockdev_client_closed(NBDClient *client, bool ignored) { nbd_client_put(client); @@ -176,7 +182,7 @@ BlockExport *nbd_export_create(BlockExportOptions *exp_args, Error **errp) assert(exp_args->type == BLOCK_EXPORT_TYPE_NBD); - if (!nbd_server) { + if (!nbd_server && !is_qemu_nbd) { error_setg(errp, "NBD server not running"); return NULL; } diff --git a/qemu-nbd.c b/qemu-nbd.c index cab65529a5..a863741e8f 100644 --- a/qemu-nbd.c +++ b/qemu-nbd.c @@ -65,7 +65,6 @@ #define MBR_SIZE 512 -static NBDExport *export; static int verbose; static char *srcpath; static SocketAddress *saddr; @@ -580,6 +579,7 @@ int main(int argc, char **argv) int old_stderr = -1; unsigned socket_activation; const char *pid_file_name = NULL; + BlockExportOptions *export_opts; #if HAVE_NBD_DEVICE /* The client thread uses SIGTERM to interrupt the server. A signal @@ -1059,9 +1059,27 @@ int main(int argc, char **argv) bs->detect_zeroes = detect_zeroes; - export = nbd_export_new(bs, export_name, - export_description, bitmap, readonly, shared > 1, - writethrough, &error_fatal); + nbd_server_is_qemu_nbd(true); + + export_opts = g_new(BlockExportOptions, 1); + *export_opts = (BlockExportOptions) { + .type = BLOCK_EXPORT_TYPE_NBD, + .has_writethrough = true, + .writethrough = writethrough, + .u.nbd = { + .device = g_strdup(bdrv_get_node_name(bs)), + .has_name = true, + .name = g_strdup(export_name), + .has_description = !!export_description, + .description = g_strdup(export_description), + .has_writable = true, + .writable = !readonly, + .has_bitmap = !!bitmap, + .bitmap = g_strdup(bitmap), + }, + }; + blk_exp_add(export_opts, &error_fatal); + qapi_free_BlockExportOptions(export_opts); if (device) { #if HAVE_NBD_DEVICE @@ -1101,9 +1119,7 @@ int main(int argc, char **argv) do { main_loop_wait(false); if (state == TERMINATE) { - nbd_export_put(export); nbd_export_close_all(); - export = NULL; state = TERMINATED; } } while (state != TERMINATED); From patchwork Thu Sep 24 15:26:58 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kevin Wolf X-Patchwork-Id: 272830 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 0BC28C4346E for ; Thu, 24 Sep 2020 15:50:15 +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 81E4A23600 for ; 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Thu, 24 Sep 2020 15:27:53 +0000 (UTC) Received: from linux.fritz.box.com (ovpn-114-72.ams2.redhat.com [10.36.114.72]) by smtp.corp.redhat.com (Postfix) with ESMTP id D869460C04; Thu, 24 Sep 2020 15:27:51 +0000 (UTC) From: Kevin Wolf To: qemu-block@nongnu.org Subject: [PATCH v2 12/31] nbd/server: Simplify export shutdown Date: Thu, 24 Sep 2020 17:26:58 +0200 Message-Id: <20200924152717.287415-13-kwolf@redhat.com> In-Reply-To: <20200924152717.287415-1-kwolf@redhat.com> References: <20200924152717.287415-1-kwolf@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=kwolf@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=63.128.21.124; envelope-from=kwolf@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/09/24 01:10:00 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -32 X-Spam_score: -3.3 X-Spam_bar: --- X-Spam_report: (-3.3 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1.199, 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_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable 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: kwolf@redhat.com, qemu-devel@nongnu.org, stefanha@redhat.com, mreitz@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Closing export is somewhat convoluted because nbd_export_close() and nbd_export_put() call each other and the ways they actually end up being nested is not necessarily obvious. However, it is not really necessary to call nbd_export_close() from nbd_export_put() when putting the last reference because it only does three things: 1. Close all clients. We're going to refcount 0 and all clients hold a reference, so we know there is no active client any more. 2. Close the user reference (represented by exp->name being non-NULL). The same argument applies: If the export were still named, we would still have a reference. 3. Freeing exp->description. This is really cleanup work to be done when the export is finally freed. There is no reason to already clear it while clients are still in the process of shutting down. So after moving the cleanup of exp->description, the code can be simplified so that only nbd_export_close() calls nbd_export_put(), but never the other way around. Signed-off-by: Kevin Wolf Reviewed-by: Max Reitz Reviewed-by: Eric Blake --- nbd/server.c | 17 ++++------------- 1 file changed, 4 insertions(+), 13 deletions(-) diff --git a/nbd/server.c b/nbd/server.c index 1cc915f01d..fb70374df5 100644 --- a/nbd/server.c +++ b/nbd/server.c @@ -1678,8 +1678,6 @@ void nbd_export_close(NBDExport *exp) QTAILQ_REMOVE(&exports, exp, next); QTAILQ_INSERT_TAIL(&closed_exports, exp, next); } - g_free(exp->description); - exp->description = NULL; nbd_export_put(exp); } @@ -1706,19 +1704,12 @@ void nbd_export_get(NBDExport *exp) void nbd_export_put(NBDExport *exp) { assert(exp->refcount > 0); - if (exp->refcount == 1) { - nbd_export_close(exp); - } - - /* nbd_export_close() may theoretically reduce refcount to 0. It may happen - * if someone calls nbd_export_put() on named export not through - * nbd_export_set_name() when refcount is 1. So, let's assert that - * it is > 0. - */ - assert(exp->refcount > 0); if (--exp->refcount == 0) { assert(exp->name == NULL); - assert(exp->description == NULL); + assert(QTAILQ_EMPTY(&exp->clients)); + + g_free(exp->description); + exp->description = NULL; if (exp->blk) { if (exp->eject_notifier_blk) { From patchwork Thu Sep 24 15:26:59 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kevin Wolf X-Patchwork-Id: 304495 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 A8B2BC4363D for ; Thu, 24 Sep 2020 16:18:23 +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 444392311B for ; 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Thu, 24 Sep 2020 15:27:54 +0000 (UTC) Received: from linux.fritz.box.com (ovpn-114-72.ams2.redhat.com [10.36.114.72]) by smtp.corp.redhat.com (Postfix) with ESMTP id 6CF0760C04; Thu, 24 Sep 2020 15:27:53 +0000 (UTC) From: Kevin Wolf To: qemu-block@nongnu.org Subject: [PATCH v2 13/31] block/export: Move refcount from NBDExport to BlockExport Date: Thu, 24 Sep 2020 17:26:59 +0200 Message-Id: <20200924152717.287415-14-kwolf@redhat.com> In-Reply-To: <20200924152717.287415-1-kwolf@redhat.com> References: <20200924152717.287415-1-kwolf@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=kwolf@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=63.128.21.124; envelope-from=kwolf@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/09/24 01:10:00 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -32 X-Spam_score: -3.3 X-Spam_bar: --- X-Spam_report: (-3.3 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1.199, 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_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable 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: kwolf@redhat.com, qemu-devel@nongnu.org, stefanha@redhat.com, mreitz@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Having a refcount makes sense for all types of block exports. It is also a prerequisite for keeping a list of all exports at the BlockExport level. Signed-off-by: Kevin Wolf Reviewed-by: Max Reitz --- include/block/export.h | 15 +++++++++ include/block/nbd.h | 2 -- block/export/export.c | 14 ++++++++ blockdev-nbd.c | 2 +- nbd/server.c | 72 +++++++++++++++++++----------------------- 5 files changed, 63 insertions(+), 42 deletions(-) diff --git a/include/block/export.h b/include/block/export.h index e7af2c7687..5236a35e12 100644 --- a/include/block/export.h +++ b/include/block/export.h @@ -24,12 +24,27 @@ typedef struct BlockExportDriver { /* Creates and starts a new block export */ BlockExport *(*create)(BlockExportOptions *, Error **); + + /* + * Frees a removed block export. This function is only called after all + * references have been dropped. + */ + void (*delete)(BlockExport *); } BlockExportDriver; struct BlockExport { const BlockExportDriver *drv; + + /* + * Reference count for this block export. This includes strong references + * both from the owner (qemu-nbd or the monitor) and clients connected to + * the export. + */ + int refcount; }; BlockExport *blk_exp_add(BlockExportOptions *export, Error **errp); +void blk_exp_ref(BlockExport *exp); +void blk_exp_unref(BlockExport *exp); #endif diff --git a/include/block/nbd.h b/include/block/nbd.h index 1dafe70615..e3bd112227 100644 --- a/include/block/nbd.h +++ b/include/block/nbd.h @@ -338,8 +338,6 @@ NBDExport *nbd_export_new(BlockDriverState *bs, void nbd_export_set_on_eject_blk(BlockExport *exp, BlockBackend *blk); void nbd_export_close(NBDExport *exp); void nbd_export_remove(NBDExport *exp, NbdServerRemoveMode mode, Error **errp); -void nbd_export_get(NBDExport *exp); -void nbd_export_put(NBDExport *exp); AioContext *nbd_export_aio_context(NBDExport *exp); NBDExport *nbd_export_find(const char *name); diff --git a/block/export/export.c b/block/export/export.c index 05bc5e3744..baba4e94ff 100644 --- a/block/export/export.c +++ b/block/export/export.c @@ -49,6 +49,20 @@ BlockExport *blk_exp_add(BlockExportOptions *export, Error **errp) return drv->create(export, errp); } +void blk_exp_ref(BlockExport *exp) +{ + assert(exp->refcount > 0); + exp->refcount++; +} + +void blk_exp_unref(BlockExport *exp) +{ + assert(exp->refcount > 0); + if (--exp->refcount == 0) { + exp->drv->delete(exp); + } +} + void qmp_block_export_add(BlockExportOptions *export, Error **errp) { blk_exp_add(export, errp); diff --git a/blockdev-nbd.c b/blockdev-nbd.c index 7bb0b09697..e208324d42 100644 --- a/blockdev-nbd.c +++ b/blockdev-nbd.c @@ -236,7 +236,7 @@ BlockExport *nbd_export_create(BlockExportOptions *exp_args, Error **errp) /* The list of named exports has a strong reference to this export now and * our only way of accessing it is through nbd_export_find(), so we can drop * the strong reference that is @exp. */ - nbd_export_put(exp); + blk_exp_unref((BlockExport*) exp); out: aio_context_release(aio_context); diff --git a/nbd/server.c b/nbd/server.c index fb70374df5..7be81c7bda 100644 --- a/nbd/server.c +++ b/nbd/server.c @@ -83,7 +83,6 @@ struct NBDRequestData { struct NBDExport { BlockExport common; - int refcount; BlockBackend *blk; char *name; @@ -499,7 +498,7 @@ static int nbd_negotiate_handle_export_name(NBDClient *client, bool no_zeroes, } QTAILQ_INSERT_TAIL(&client->exp->clients, client, next); - nbd_export_get(client->exp); + blk_exp_ref(&client->exp->common); nbd_check_meta_export(client); return 0; @@ -707,7 +706,7 @@ static int nbd_negotiate_handle_info(NBDClient *client, Error **errp) client->exp = exp; client->check_align = check_align; QTAILQ_INSERT_TAIL(&client->exp->clients, client, next); - nbd_export_get(client->exp); + blk_exp_ref(&client->exp->common); nbd_check_meta_export(client); rc = 1; } @@ -1406,7 +1405,7 @@ void nbd_client_put(NBDClient *client) g_free(client->tlsauthz); if (client->exp) { QTAILQ_REMOVE(&client->exp->clients, client, next); - nbd_export_put(client->exp); + blk_exp_unref(&client->exp->common); } g_free(client); } @@ -1538,7 +1537,8 @@ NBDExport *nbd_export_new(BlockDriverState *bs, exp = g_new0(NBDExport, 1); exp->common = (BlockExport) { - .drv = &blk_exp_nbd, + .drv = &blk_exp_nbd, + .refcount = 1, }; /* @@ -1567,7 +1567,6 @@ NBDExport *nbd_export_new(BlockDriverState *bs, blk_set_enable_write_cache(blk, !writethrough); blk_set_allow_aio_context_change(blk, true); - exp->refcount = 1; QTAILQ_INIT(&exp->clients); exp->blk = blk; exp->name = g_strdup(name); @@ -1626,8 +1625,9 @@ NBDExport *nbd_export_new(BlockDriverState *bs, exp->ctx = ctx; blk_add_aio_context_notifier(blk, blk_aio_attached, blk_aio_detach, exp); + blk_exp_ref(&exp->common); QTAILQ_INSERT_TAIL(&exports, exp, next); - nbd_export_get(exp); + return exp; fail: @@ -1660,7 +1660,7 @@ void nbd_export_close(NBDExport *exp) { NBDClient *client, *next; - nbd_export_get(exp); + blk_exp_ref(&exp->common); /* * TODO: Should we expand QMP NbdServerRemoveNode enum to allow a * close mode that stops advertising the export to new clients but @@ -1672,13 +1672,13 @@ void nbd_export_close(NBDExport *exp) client_close(client, true); } if (exp->name) { - nbd_export_put(exp); + blk_exp_unref(&exp->common); g_free(exp->name); exp->name = NULL; QTAILQ_REMOVE(&exports, exp, next); QTAILQ_INSERT_TAIL(&closed_exports, exp, next); } - nbd_export_put(exp); + blk_exp_unref(&exp->common); } void nbd_export_remove(NBDExport *exp, NbdServerRemoveMode mode, Error **errp) @@ -1695,47 +1695,41 @@ void nbd_export_remove(NBDExport *exp, NbdServerRemoveMode mode, Error **errp) error_append_hint(errp, "Use mode='hard' to force client disconnect\n"); } -void nbd_export_get(NBDExport *exp) -{ - assert(exp->refcount > 0); - exp->refcount++; -} - -void nbd_export_put(NBDExport *exp) +static void nbd_export_delete(BlockExport *blk_exp) { - assert(exp->refcount > 0); - if (--exp->refcount == 0) { - assert(exp->name == NULL); - assert(QTAILQ_EMPTY(&exp->clients)); + NBDExport *exp = container_of(blk_exp, NBDExport, common); - g_free(exp->description); - exp->description = NULL; + assert(exp->name == NULL); + assert(QTAILQ_EMPTY(&exp->clients)); - if (exp->blk) { - if (exp->eject_notifier_blk) { - notifier_remove(&exp->eject_notifier); - blk_unref(exp->eject_notifier_blk); - } - blk_remove_aio_context_notifier(exp->blk, blk_aio_attached, - blk_aio_detach, exp); - blk_unref(exp->blk); - exp->blk = NULL; - } + g_free(exp->description); + exp->description = NULL; - if (exp->export_bitmap) { - bdrv_dirty_bitmap_set_busy(exp->export_bitmap, false); - g_free(exp->export_bitmap_context); + if (exp->blk) { + if (exp->eject_notifier_blk) { + notifier_remove(&exp->eject_notifier); + blk_unref(exp->eject_notifier_blk); } + blk_remove_aio_context_notifier(exp->blk, blk_aio_attached, + blk_aio_detach, exp); + blk_unref(exp->blk); + exp->blk = NULL; + } - QTAILQ_REMOVE(&closed_exports, exp, next); - g_free(exp); - aio_wait_kick(); + if (exp->export_bitmap) { + bdrv_dirty_bitmap_set_busy(exp->export_bitmap, false); + g_free(exp->export_bitmap_context); } + + QTAILQ_REMOVE(&closed_exports, exp, next); + g_free(exp); + aio_wait_kick(); } const BlockExportDriver blk_exp_nbd = { .type = BLOCK_EXPORT_TYPE_NBD, .create = nbd_export_create, + .delete = nbd_export_delete, }; void nbd_export_close_all(void) From patchwork Thu Sep 24 15:27:00 2020 Content-Type: text/plain; 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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]:44594 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kLTXO-0007v2-5v for qemu-devel@archiver.kernel.org; Thu, 24 Sep 2020 11:52:02 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:48952) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kLTAD-0001Sw-Fw for qemu-devel@nongnu.org; Thu, 24 Sep 2020 11:28:05 -0400 Received: from us-smtp-delivery-124.mimecast.com ([63.128.21.124]:22107) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1kLTA9-0005WX-Rr for qemu-devel@nongnu.org; Thu, 24 Sep 2020 11:28:05 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1600961281; 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=fKzT3UeYJ9sc1hti4D1wy89SYfS6DINx/n9breZw6iE=; b=g58E0PUTLgjo6ySzh+KoqZb3lfTpLfobwTT7YzUY3i1KyDjKschYnDxsgPF8WP2d2oLgEE QtbTDlo9TEjPjTs5BfrZoVHp6GDvio3c68KzxRqEZ5yi0JzID0guZv+/HFyEATEWoMixC3 YDAlL0p3W2SogCwa8P073xmvWgp7Kh4= 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-566-jkl4owRiPfCQhV8guItMeQ-1; Thu, 24 Sep 2020 11:27:59 -0400 X-MC-Unique: jkl4owRiPfCQhV8guItMeQ-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 40571195D578; Thu, 24 Sep 2020 15:27:56 +0000 (UTC) Received: from linux.fritz.box.com (ovpn-114-72.ams2.redhat.com [10.36.114.72]) by smtp.corp.redhat.com (Postfix) with ESMTP id 0114760C04; Thu, 24 Sep 2020 15:27:54 +0000 (UTC) From: Kevin Wolf To: qemu-block@nongnu.org Subject: [PATCH v2 14/31] block/export: Move AioContext from NBDExport to BlockExport Date: Thu, 24 Sep 2020 17:27:00 +0200 Message-Id: <20200924152717.287415-15-kwolf@redhat.com> In-Reply-To: <20200924152717.287415-1-kwolf@redhat.com> References: <20200924152717.287415-1-kwolf@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=kwolf@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=63.128.21.124; envelope-from=kwolf@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/09/24 01:10:00 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -32 X-Spam_score: -3.3 X-Spam_bar: --- X-Spam_report: (-3.3 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1.199, 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_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable 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: kwolf@redhat.com, qemu-devel@nongnu.org, stefanha@redhat.com, mreitz@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Signed-off-by: Kevin Wolf Reviewed-by: Max Reitz --- include/block/export.h | 3 +++ block/export/export.c | 2 ++ nbd/server.c | 26 +++++++++++++------------- 3 files changed, 18 insertions(+), 13 deletions(-) diff --git a/include/block/export.h b/include/block/export.h index 5236a35e12..e6f96f4e1e 100644 --- a/include/block/export.h +++ b/include/block/export.h @@ -41,6 +41,9 @@ struct BlockExport { * the export. */ int refcount; + + /* The AioContext whose lock protects this BlockExport object. */ + AioContext *ctx; }; BlockExport *blk_exp_add(BlockExportOptions *export, Error **errp); diff --git a/block/export/export.c b/block/export/export.c index baba4e94ff..8635318ef1 100644 --- a/block/export/export.c +++ b/block/export/export.c @@ -49,12 +49,14 @@ BlockExport *blk_exp_add(BlockExportOptions *export, Error **errp) return drv->create(export, errp); } +/* Callers must hold exp->ctx lock */ void blk_exp_ref(BlockExport *exp) { assert(exp->refcount > 0); exp->refcount++; } +/* Callers must hold exp->ctx lock */ void blk_exp_unref(BlockExport *exp) { assert(exp->refcount > 0); diff --git a/nbd/server.c b/nbd/server.c index 7be81c7bda..7cf81646fc 100644 --- a/nbd/server.c +++ b/nbd/server.c @@ -92,8 +92,6 @@ struct NBDExport { QTAILQ_HEAD(, NBDClient) clients; QTAILQ_ENTRY(NBDExport) next; - AioContext *ctx; - BlockBackend *eject_notifier_blk; Notifier eject_notifier; @@ -1333,8 +1331,8 @@ static coroutine_fn int nbd_negotiate(NBDClient *client, Error **errp) } /* Attach the channel to the same AioContext as the export */ - if (client->exp && client->exp->ctx) { - qio_channel_attach_aio_context(client->ioc, client->exp->ctx); + if (client->exp && client->exp->common.ctx) { + qio_channel_attach_aio_context(client->ioc, client->exp->common.ctx); } assert(!client->optlen); @@ -1466,7 +1464,7 @@ static void blk_aio_attached(AioContext *ctx, void *opaque) trace_nbd_blk_aio_attached(exp->name, ctx); - exp->ctx = ctx; + exp->common.ctx = ctx; QTAILQ_FOREACH(client, &exp->clients, next) { qio_channel_attach_aio_context(client->ioc, ctx); @@ -1484,13 +1482,13 @@ static void blk_aio_detach(void *opaque) NBDExport *exp = opaque; NBDClient *client; - trace_nbd_blk_aio_detach(exp->name, exp->ctx); + trace_nbd_blk_aio_detach(exp->name, exp->common.ctx); QTAILQ_FOREACH(client, &exp->clients, next) { qio_channel_detach_aio_context(client->ioc); } - exp->ctx = NULL; + exp->common.ctx = NULL; } static void nbd_eject_notifier(Notifier *n, void *data) @@ -1498,7 +1496,7 @@ static void nbd_eject_notifier(Notifier *n, void *data) NBDExport *exp = container_of(n, NBDExport, eject_notifier); AioContext *aio_context; - aio_context = exp->ctx; + aio_context = exp->common.ctx; aio_context_acquire(aio_context); nbd_export_close(exp); aio_context_release(aio_context); @@ -1535,10 +1533,13 @@ NBDExport *nbd_export_new(BlockDriverState *bs, return NULL; } + ctx = bdrv_get_aio_context(bs); + exp = g_new0(NBDExport, 1); exp->common = (BlockExport) { .drv = &blk_exp_nbd, .refcount = 1, + .ctx = ctx, }; /* @@ -1548,7 +1549,7 @@ NBDExport *nbd_export_new(BlockDriverState *bs, * ctx was acquired in the caller. */ assert(name && strlen(name) <= NBD_MAX_STRING_SIZE); - ctx = bdrv_get_aio_context(bs); + bdrv_invalidate_cache(bs, NULL); /* Don't allow resize while the NBD server is running, otherwise we don't @@ -1622,7 +1623,6 @@ NBDExport *nbd_export_new(BlockDriverState *bs, assert(strlen(exp->export_bitmap_context) < NBD_MAX_STRING_SIZE); } - exp->ctx = ctx; blk_add_aio_context_notifier(blk, blk_aio_attached, blk_aio_detach, exp); blk_exp_ref(&exp->common); @@ -1653,7 +1653,7 @@ NBDExport *nbd_export_find(const char *name) AioContext * nbd_export_aio_context(NBDExport *exp) { - return exp->ctx; + return exp->common.ctx; } void nbd_export_close(NBDExport *exp) @@ -1738,7 +1738,7 @@ void nbd_export_close_all(void) AioContext *aio_context; QTAILQ_FOREACH_SAFE(exp, &exports, next, next) { - aio_context = exp->ctx; + aio_context = exp->common.ctx; aio_context_acquire(aio_context); nbd_export_close(exp); aio_context_release(aio_context); @@ -2537,7 +2537,7 @@ static void nbd_client_receive_next_request(NBDClient *client) if (!client->recv_coroutine && client->nb_requests < MAX_NBD_REQUESTS) { nbd_client_get(client); client->recv_coroutine = qemu_coroutine_create(nbd_trip, client); - aio_co_schedule(client->exp->ctx, client->recv_coroutine); + aio_co_schedule(client->exp->common.ctx, client->recv_coroutine); } } From patchwork Thu Sep 24 15:27:01 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kevin Wolf X-Patchwork-Id: 304500 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 4FF02C4363D for ; 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Thu, 24 Sep 2020 11:28:05 -0400 X-MC-Unique: 8qCsq76mMce_bdudO4xtHQ-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id C7C1980EF9F; Thu, 24 Sep 2020 15:27:57 +0000 (UTC) Received: from linux.fritz.box.com (ovpn-114-72.ams2.redhat.com [10.36.114.72]) by smtp.corp.redhat.com (Postfix) with ESMTP id 88C2560C04; Thu, 24 Sep 2020 15:27:56 +0000 (UTC) From: Kevin Wolf To: qemu-block@nongnu.org Subject: [PATCH v2 15/31] block/export: Add node-name to BlockExportOptions Date: Thu, 24 Sep 2020 17:27:01 +0200 Message-Id: <20200924152717.287415-16-kwolf@redhat.com> In-Reply-To: <20200924152717.287415-1-kwolf@redhat.com> References: <20200924152717.287415-1-kwolf@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=kwolf@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=216.205.24.124; envelope-from=kwolf@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/09/22 23:02:20 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -32 X-Spam_score: -3.3 X-Spam_bar: --- X-Spam_report: (-3.3 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1.199, 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_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable 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: kwolf@redhat.com, qemu-devel@nongnu.org, stefanha@redhat.com, mreitz@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Every block export needs a block node to export, so add a 'node-name' option to BlockExportOptions and remove the replaced option 'device' from BlockExportOptionsNbd. To maintain compatibility in nbd-server-add, BlockExportOptionsNbd needs to be wrapped by a new type NbdServerAddOptions that adds 'device' back because nbd-server-add doesn't use the BlockExportOptions base type at all (so even without changing it to a 'node-name' option in block-export-add, this compatibility code would be necessary). Signed-off-by: Kevin Wolf Reviewed-by: Max Reitz --- qapi/block-export.json | 27 ++++++++++++++++----- block/monitor/block-hmp-cmds.c | 6 ++--- blockdev-nbd.c | 44 +++++++++++++++++++++++++--------- qemu-nbd.c | 2 +- 4 files changed, 58 insertions(+), 21 deletions(-) diff --git a/qapi/block-export.json b/qapi/block-export.json index 319a38be88..d20b3a085d 100644 --- a/qapi/block-export.json +++ b/qapi/block-export.json @@ -65,9 +65,8 @@ ## # @BlockExportOptionsNbd: # -# An NBD block export. -# -# @device: The device name or node name of the node to be exported +# An NBD block export (options shared between nbd-server-add and the NBD branch +# of block-export-add). # # @name: Export name. If unspecified, the @device parameter is used as the # export name. (Since 2.12) @@ -85,8 +84,21 @@ # Since: 5.0 ## { 'struct': 'BlockExportOptionsNbd', - 'data': {'device': 'str', '*name': 'str', '*description': 'str', - '*writable': 'bool', '*bitmap': 'str' } } + 'data': { '*name': 'str', '*description': 'str', + '*writable': 'bool', '*bitmap': 'str' } } + +## +# @NbdServerAddOptions: +# +# An NBD block export. +# +# @device: The device name or node name of the node to be exported +# +# Since: 5.0 +## +{ 'struct': 'NbdServerAddOptions', + 'base': 'BlockExportOptionsNbd', + 'data': { 'device': 'str' } } ## # @nbd-server-add: @@ -99,7 +111,7 @@ # Since: 1.3.0 ## { 'command': 'nbd-server-add', - 'data': 'BlockExportOptionsNbd', 'boxed': true } + 'data': 'NbdServerAddOptions', 'boxed': true } ## # @NbdServerRemoveMode: @@ -170,6 +182,8 @@ # Describes a block export, i.e. how single node should be exported on an # external interface. # +# @node-name: The node name of the block node to be exported (since: 5.2) +# # @writethrough: If true, caches are flushed after every write request to the # export before completion is signalled. (since: 5.2; # default: false) @@ -178,6 +192,7 @@ ## { 'union': 'BlockExportOptions', 'base': { 'type': 'BlockExportType', + 'node-name': 'str', '*writethrough': 'bool' }, 'discriminator': 'type', 'data': { diff --git a/block/monitor/block-hmp-cmds.c b/block/monitor/block-hmp-cmds.c index 662b7f7d00..db357cafcb 100644 --- a/block/monitor/block-hmp-cmds.c +++ b/block/monitor/block-hmp-cmds.c @@ -398,7 +398,7 @@ void hmp_nbd_server_start(Monitor *mon, const QDict *qdict) Error *local_err = NULL; BlockInfoList *block_list, *info; SocketAddress *addr; - BlockExportOptionsNbd export; + NbdServerAddOptions export; if (writable && !all) { error_setg(&local_err, "-w only valid together with -a"); @@ -431,7 +431,7 @@ void hmp_nbd_server_start(Monitor *mon, const QDict *qdict) continue; } - export = (BlockExportOptionsNbd) { + export = (NbdServerAddOptions) { .device = info->value->device, .has_writable = true, .writable = writable, @@ -458,7 +458,7 @@ void hmp_nbd_server_add(Monitor *mon, const QDict *qdict) bool writable = qdict_get_try_bool(qdict, "writable", false); Error *local_err = NULL; - BlockExportOptionsNbd export = { + NbdServerAddOptions export = { .device = (char *) device, .has_name = !!name, .name = (char *) name, diff --git a/blockdev-nbd.c b/blockdev-nbd.c index e208324d42..ef14303b25 100644 --- a/blockdev-nbd.c +++ b/blockdev-nbd.c @@ -188,7 +188,7 @@ BlockExport *nbd_export_create(BlockExportOptions *exp_args, Error **errp) } if (!arg->has_name) { - arg->name = arg->device; + arg->name = exp_args->node_name; } if (strlen(arg->name) > NBD_MAX_STRING_SIZE) { @@ -206,7 +206,7 @@ BlockExport *nbd_export_create(BlockExportOptions *exp_args, Error **errp) return NULL; } - bs = bdrv_lookup_bs(arg->device, arg->device, errp); + bs = bdrv_lookup_bs(NULL, exp_args->node_name, errp); if (!bs) { return NULL; } @@ -244,21 +244,40 @@ BlockExport *nbd_export_create(BlockExportOptions *exp_args, Error **errp) return (BlockExport*) exp; } -void qmp_nbd_server_add(BlockExportOptionsNbd *arg, Error **errp) +void qmp_nbd_server_add(NbdServerAddOptions *arg, Error **errp) { BlockExport *export; BlockDriverState *bs; BlockBackend *on_eject_blk; - BlockExportOptions export_opts; + BlockExportOptions *export_opts; bs = bdrv_lookup_bs(arg->device, arg->device, errp); if (!bs) { return; } - export_opts = (BlockExportOptions) { - .type = BLOCK_EXPORT_TYPE_NBD, - .u.nbd = *arg, + /* + * block-export-add would default to the node-name, but we may have to use + * the device name as a default here for compatibility. + */ + if (!arg->has_name) { + arg->name = arg->device; + } + + export_opts = g_new(BlockExportOptions, 1); + *export_opts = (BlockExportOptions) { + .type = BLOCK_EXPORT_TYPE_NBD, + .node_name = g_strdup(bdrv_get_node_name(bs)), + .u.nbd = { + .has_name = true, + .name = g_strdup(arg->name), + .has_description = arg->has_description, + .description = g_strdup(arg->description), + .has_writable = arg->has_writable, + .writable = arg->writable, + .has_bitmap = arg->has_bitmap, + .bitmap = g_strdup(arg->bitmap), + }, }; /* @@ -267,13 +286,13 @@ void qmp_nbd_server_add(BlockExportOptionsNbd *arg, Error **errp) * block-export-add. */ if (bdrv_is_read_only(bs)) { - export_opts.u.nbd.has_writable = true; - export_opts.u.nbd.writable = false; + export_opts->u.nbd.has_writable = true; + export_opts->u.nbd.writable = false; } - export = blk_exp_add(&export_opts, errp); + export = blk_exp_add(export_opts, errp); if (!export) { - return; + goto fail; } /* @@ -284,6 +303,9 @@ void qmp_nbd_server_add(BlockExportOptionsNbd *arg, Error **errp) if (on_eject_blk) { nbd_export_set_on_eject_blk(export, on_eject_blk); } + +fail: + qapi_free_BlockExportOptions(export_opts); } void qmp_nbd_server_remove(const char *name, diff --git a/qemu-nbd.c b/qemu-nbd.c index a863741e8f..23c2b7da8e 100644 --- a/qemu-nbd.c +++ b/qemu-nbd.c @@ -1064,10 +1064,10 @@ int main(int argc, char **argv) export_opts = g_new(BlockExportOptions, 1); *export_opts = (BlockExportOptions) { .type = BLOCK_EXPORT_TYPE_NBD, + .node_name = g_strdup(bdrv_get_node_name(bs)), .has_writethrough = true, .writethrough = writethrough, .u.nbd = { - .device = g_strdup(bdrv_get_node_name(bs)), .has_name = true, .name = g_strdup(export_name), .has_description = !!export_description, From patchwork Thu Sep 24 15:27:02 2020 Content-Type: text/plain; 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bh=Pf2PAz2JNwk4y16xrrrFoPYHte06nf0NXa26OsZPjys=; b=UoP/09qurL2n2t7dhYyLzZrfjjBCh0FRUnsOq+M2mke2VRzhzp87ckzdY34I82xiAsByl+ o1Iw4HSbksyu+vAFS2MdyxDNIctVgIkCQIXOHIwrE29B7NxNMKvzZGRrPGuV1J1e1WbEL6 xznz++tvhiBEGjIT9krlj7Zt6lzC6AM= 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-19-Bxq7QPzvOiSA7tn8UJ1MmQ-1; Thu, 24 Sep 2020 11:28:00 -0400 X-MC-Unique: Bxq7QPzvOiSA7tn8UJ1MmQ-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 5CE8219611BC; Thu, 24 Sep 2020 15:27:59 +0000 (UTC) Received: from linux.fritz.box.com (ovpn-114-72.ams2.redhat.com [10.36.114.72]) by smtp.corp.redhat.com (Postfix) with ESMTP id 1BB1C60C04; Thu, 24 Sep 2020 15:27:57 +0000 (UTC) From: Kevin Wolf To: qemu-block@nongnu.org Subject: [PATCH v2 16/31] block/export: Allocate BlockExport in blk_exp_add() Date: Thu, 24 Sep 2020 17:27:02 +0200 Message-Id: <20200924152717.287415-17-kwolf@redhat.com> In-Reply-To: <20200924152717.287415-1-kwolf@redhat.com> References: <20200924152717.287415-1-kwolf@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=kwolf@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=216.205.24.124; envelope-from=kwolf@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/09/22 23:02:20 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -32 X-Spam_score: -3.3 X-Spam_bar: --- X-Spam_report: (-3.3 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1.199, 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_H5=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: kwolf@redhat.com, qemu-devel@nongnu.org, stefanha@redhat.com, mreitz@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Instead of letting the driver allocate and return the BlockExport object, allocate it already in blk_exp_add() and pass it. This allows us to initialise the generic part before calling into the driver so that the driver can just use these values instead of having to parse the options a second time. For symmetry, move freeing the BlockExport to blk_exp_unref(). Signed-off-by: Kevin Wolf Reviewed-by: Max Reitz --- include/block/export.h | 8 +++++++- include/block/nbd.h | 11 ++++++----- block/export/export.c | 18 +++++++++++++++++- blockdev-nbd.c | 26 ++++++++++++++------------ nbd/server.c | 30 +++++++++++++----------------- 5 files changed, 57 insertions(+), 36 deletions(-) diff --git a/include/block/export.h b/include/block/export.h index e6f96f4e1e..cf9b1c9dad 100644 --- a/include/block/export.h +++ b/include/block/export.h @@ -22,8 +22,14 @@ typedef struct BlockExportDriver { /* The export type that this driver services */ BlockExportType type; + /* + * The size of the driver-specific state that contains BlockExport as its + * first field. + */ + size_t instance_size; + /* Creates and starts a new block export */ - BlockExport *(*create)(BlockExportOptions *, Error **); + int (*create)(BlockExport *, BlockExportOptions *, Error **); /* * Frees a removed block export. This function is only called after all diff --git a/include/block/nbd.h b/include/block/nbd.h index e3bd112227..fc2c153d5b 100644 --- a/include/block/nbd.h +++ b/include/block/nbd.h @@ -330,11 +330,12 @@ int nbd_errno_to_system_errno(int err); typedef struct NBDExport NBDExport; typedef struct NBDClient NBDClient; -BlockExport *nbd_export_create(BlockExportOptions *exp_args, Error **errp); -NBDExport *nbd_export_new(BlockDriverState *bs, - const char *name, const char *desc, - const char *bitmap, bool readonly, bool shared, - bool writethrough, Error **errp); +int nbd_export_create(BlockExport *exp, BlockExportOptions *exp_args, + Error **errp); +int nbd_export_new(BlockExport *blk_exp, BlockDriverState *bs, + const char *name, const char *desc, + const char *bitmap, bool readonly, bool shared, + bool writethrough, Error **errp); void nbd_export_set_on_eject_blk(BlockExport *exp, BlockBackend *blk); void nbd_export_close(NBDExport *exp); void nbd_export_remove(NBDExport *exp, NbdServerRemoveMode mode, Error **errp); diff --git a/block/export/export.c b/block/export/export.c index 8635318ef1..6b2b29078b 100644 --- a/block/export/export.c +++ b/block/export/export.c @@ -39,6 +39,8 @@ static const BlockExportDriver *blk_exp_find_driver(BlockExportType type) BlockExport *blk_exp_add(BlockExportOptions *export, Error **errp) { const BlockExportDriver *drv; + BlockExport *exp; + int ret; drv = blk_exp_find_driver(export->type); if (!drv) { @@ -46,7 +48,20 @@ BlockExport *blk_exp_add(BlockExportOptions *export, Error **errp) return NULL; } - return drv->create(export, errp); + assert(drv->instance_size >= sizeof(BlockExport)); + exp = g_malloc0(drv->instance_size); + *exp = (BlockExport) { + .drv = drv, + .refcount = 1, + }; + + ret = drv->create(exp, export, errp); + if (ret < 0) { + g_free(exp); + return NULL; + } + + return exp; } /* Callers must hold exp->ctx lock */ @@ -62,6 +77,7 @@ void blk_exp_unref(BlockExport *exp) assert(exp->refcount > 0); if (--exp->refcount == 0) { exp->drv->delete(exp); + g_free(exp); } } diff --git a/blockdev-nbd.c b/blockdev-nbd.c index ef14303b25..b34f159888 100644 --- a/blockdev-nbd.c +++ b/blockdev-nbd.c @@ -173,18 +173,19 @@ void qmp_nbd_server_start(SocketAddressLegacy *addr, qapi_free_SocketAddress(addr_flat); } -BlockExport *nbd_export_create(BlockExportOptions *exp_args, Error **errp) +int nbd_export_create(BlockExport *exp, BlockExportOptions *exp_args, + Error **errp) { BlockExportOptionsNbd *arg = &exp_args->u.nbd; BlockDriverState *bs = NULL; - NBDExport *exp = NULL; AioContext *aio_context; + int ret; assert(exp_args->type == BLOCK_EXPORT_TYPE_NBD); if (!nbd_server && !is_qemu_nbd) { error_setg(errp, "NBD server not running"); - return NULL; + return -EINVAL; } if (!arg->has_name) { @@ -193,22 +194,22 @@ BlockExport *nbd_export_create(BlockExportOptions *exp_args, Error **errp) if (strlen(arg->name) > NBD_MAX_STRING_SIZE) { error_setg(errp, "export name '%s' too long", arg->name); - return NULL; + return -EINVAL; } if (arg->description && strlen(arg->description) > NBD_MAX_STRING_SIZE) { error_setg(errp, "description '%s' too long", arg->description); - return NULL; + return -EINVAL; } if (nbd_export_find(arg->name)) { error_setg(errp, "NBD server already has export named '%s'", arg->name); - return NULL; + return -EEXIST; } bs = bdrv_lookup_bs(NULL, exp_args->node_name, errp); if (!bs) { - return NULL; + return -ENOENT; } aio_context = bdrv_get_aio_context(bs); @@ -218,6 +219,7 @@ BlockExport *nbd_export_create(BlockExportOptions *exp_args, Error **errp) arg->writable = false; } if (bdrv_is_read_only(bs) && arg->writable) { + ret = -EINVAL; error_setg(errp, "Cannot export read-only node as writable"); goto out; } @@ -226,22 +228,22 @@ BlockExport *nbd_export_create(BlockExportOptions *exp_args, Error **errp) exp_args->writethrough = false; } - exp = nbd_export_new(bs, arg->name, arg->description, arg->bitmap, + ret = nbd_export_new(exp, bs, arg->name, arg->description, arg->bitmap, !arg->writable, !arg->writable, exp_args->writethrough, errp); - if (!exp) { + if (ret < 0) { goto out; } /* The list of named exports has a strong reference to this export now and * our only way of accessing it is through nbd_export_find(), so we can drop * the strong reference that is @exp. */ - blk_exp_unref((BlockExport*) exp); + blk_exp_unref(exp); + ret = 0; out: aio_context_release(aio_context); - /* TODO Remove the cast: nbd_export_new() will return a BlockExport. */ - return (BlockExport*) exp; + return ret; } void qmp_nbd_server_add(NbdServerAddOptions *arg, Error **errp) diff --git a/nbd/server.c b/nbd/server.c index 7cf81646fc..f31d8bbb60 100644 --- a/nbd/server.c +++ b/nbd/server.c @@ -1514,14 +1514,14 @@ void nbd_export_set_on_eject_blk(BlockExport *exp, BlockBackend *blk) blk_add_remove_bs_notifier(blk, &nbd_exp->eject_notifier); } -NBDExport *nbd_export_new(BlockDriverState *bs, - const char *name, const char *desc, - const char *bitmap, bool readonly, bool shared, - bool writethrough, Error **errp) +int nbd_export_new(BlockExport *blk_exp, BlockDriverState *bs, + const char *name, const char *desc, + const char *bitmap, bool readonly, bool shared, + bool writethrough, Error **errp) { + NBDExport *exp = container_of(blk_exp, NBDExport, common); AioContext *ctx; BlockBackend *blk; - NBDExport *exp; int64_t size; uint64_t perm; int ret; @@ -1530,17 +1530,11 @@ NBDExport *nbd_export_new(BlockDriverState *bs, if (size < 0) { error_setg_errno(errp, -size, "Failed to determine the NBD export's length"); - return NULL; + return size; } ctx = bdrv_get_aio_context(bs); - - exp = g_new0(NBDExport, 1); - exp->common = (BlockExport) { - .drv = &blk_exp_nbd, - .refcount = 1, - .ctx = ctx, - }; + blk_exp->ctx = ctx; /* * NBD exports are used for non-shared storage migration. Make sure @@ -1599,16 +1593,19 @@ NBDExport *nbd_export_new(BlockDriverState *bs, } if (bm == NULL) { + ret = -ENOENT; error_setg(errp, "Bitmap '%s' is not found", bitmap); goto fail; } if (bdrv_dirty_bitmap_check(bm, BDRV_BITMAP_ALLOW_RO, errp)) { + ret = -EINVAL; goto fail; } if (readonly && bdrv_is_writable(bs) && bdrv_dirty_bitmap_enabled(bm)) { + ret = -EINVAL; error_setg(errp, "Enabled bitmap '%s' incompatible with readonly export", bitmap); @@ -1628,14 +1625,13 @@ NBDExport *nbd_export_new(BlockDriverState *bs, blk_exp_ref(&exp->common); QTAILQ_INSERT_TAIL(&exports, exp, next); - return exp; + return 0; fail: blk_unref(blk); g_free(exp->name); g_free(exp->description); - g_free(exp); - return NULL; + return ret; } NBDExport *nbd_export_find(const char *name) @@ -1722,12 +1718,12 @@ static void nbd_export_delete(BlockExport *blk_exp) } QTAILQ_REMOVE(&closed_exports, exp, next); - g_free(exp); aio_wait_kick(); } const BlockExportDriver blk_exp_nbd = { .type = BLOCK_EXPORT_TYPE_NBD, + .instance_size = sizeof(NBDExport), .create = nbd_export_create, .delete = nbd_export_delete, }; 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Thu, 24 Sep 2020 15:28:00 +0000 (UTC) Received: from linux.fritz.box.com (ovpn-114-72.ams2.redhat.com [10.36.114.72]) by smtp.corp.redhat.com (Postfix) with ESMTP id A466160C04; Thu, 24 Sep 2020 15:27:59 +0000 (UTC) From: Kevin Wolf To: qemu-block@nongnu.org Subject: [PATCH v2 17/31] block/export: Add blk_exp_close_all(_type) Date: Thu, 24 Sep 2020 17:27:03 +0200 Message-Id: <20200924152717.287415-18-kwolf@redhat.com> In-Reply-To: <20200924152717.287415-1-kwolf@redhat.com> References: <20200924152717.287415-1-kwolf@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=kwolf@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=216.205.24.124; envelope-from=kwolf@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/09/22 23:02:20 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -32 X-Spam_score: -3.3 X-Spam_bar: --- X-Spam_report: (-3.3 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1.199, 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_H5=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: kwolf@redhat.com, qemu-devel@nongnu.org, stefanha@redhat.com, mreitz@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" This adds a function to shut down all block exports, and another one to shut down the block exports of a single type. The latter is used for now when stopping the NBD server. As soon as we implement support for multiple NBD servers, we'll need a per-server list of exports and it will be replaced by a function using that. As a side effect, the BlockExport layer has a list tracking all existing exports now. closed_exports loses its only user and can go away. Signed-off-by: Kevin Wolf Reviewed-by: Max Reitz --- include/block/export.h | 15 ++++++++ include/block/nbd.h | 2 - block.c | 2 +- block/export/export.c | 86 +++++++++++++++++++++++++++++++++++++++++- blockdev-nbd.c | 2 +- nbd/server.c | 34 +++-------------- qemu-nbd.c | 2 +- 7 files changed, 107 insertions(+), 36 deletions(-) diff --git a/include/block/export.h b/include/block/export.h index cf9b1c9dad..6fffcb5651 100644 --- a/include/block/export.h +++ b/include/block/export.h @@ -15,6 +15,7 @@ #define BLOCK_EXPORT_H #include "qapi/qapi-types-block-export.h" +#include "qemu/queue.h" typedef struct BlockExport BlockExport; @@ -36,6 +37,14 @@ typedef struct BlockExportDriver { * references have been dropped. */ void (*delete)(BlockExport *); + + /* + * Start to disconnect all clients and drop other references held + * internally by the export driver. When the function returns, there may + * still be active references while the export is in the process of + * shutting down. + */ + void (*request_shutdown)(BlockExport *); } BlockExportDriver; struct BlockExport { @@ -50,10 +59,16 @@ struct BlockExport { /* The AioContext whose lock protects this BlockExport object. */ AioContext *ctx; + + /* List entry for block_exports */ + QLIST_ENTRY(BlockExport) next; }; BlockExport *blk_exp_add(BlockExportOptions *export, Error **errp); void blk_exp_ref(BlockExport *exp); void blk_exp_unref(BlockExport *exp); +void blk_exp_request_shutdown(BlockExport *exp); +void blk_exp_close_all(void); +void blk_exp_close_all_type(BlockExportType type); #endif diff --git a/include/block/nbd.h b/include/block/nbd.h index fc2c153d5b..0b9f3e5d4e 100644 --- a/include/block/nbd.h +++ b/include/block/nbd.h @@ -337,12 +337,10 @@ int nbd_export_new(BlockExport *blk_exp, BlockDriverState *bs, const char *bitmap, bool readonly, bool shared, bool writethrough, Error **errp); void nbd_export_set_on_eject_blk(BlockExport *exp, BlockBackend *blk); -void nbd_export_close(NBDExport *exp); void nbd_export_remove(NBDExport *exp, NbdServerRemoveMode mode, Error **errp); AioContext *nbd_export_aio_context(NBDExport *exp); NBDExport *nbd_export_find(const char *name); -void nbd_export_close_all(void); void nbd_client_new(QIOChannelSocket *sioc, QCryptoTLSCreds *tlscreds, diff --git a/block.c b/block.c index 11ab55f80b..47a9d91fb4 100644 --- a/block.c +++ b/block.c @@ -4462,7 +4462,7 @@ static void bdrv_close(BlockDriverState *bs) void bdrv_close_all(void) { assert(job_next(NULL) == NULL); - nbd_export_close_all(); + blk_exp_close_all(); /* Drop references from requests still in flight, such as canceled block * jobs whose AIO context has not been polled yet */ diff --git a/block/export/export.c b/block/export/export.c index 6b2b29078b..e94a68c183 100644 --- a/block/export/export.c +++ b/block/export/export.c @@ -24,6 +24,10 @@ static const BlockExportDriver *blk_exp_drivers[] = { &blk_exp_nbd, }; +/* Only accessed from the main thread */ +static QLIST_HEAD(, BlockExport) block_exports = + QLIST_HEAD_INITIALIZER(block_exports); + static const BlockExportDriver *blk_exp_find_driver(BlockExportType type) { int i; @@ -61,6 +65,7 @@ BlockExport *blk_exp_add(BlockExportOptions *export, Error **errp) return NULL; } + QLIST_INSERT_HEAD(&block_exports, exp, next); return exp; } @@ -71,14 +76,91 @@ void blk_exp_ref(BlockExport *exp) exp->refcount++; } +/* Runs in the main thread */ +static void blk_exp_delete_bh(void *opaque) +{ + BlockExport *exp = opaque; + AioContext *aio_context = exp->ctx; + + aio_context_acquire(aio_context); + + assert(exp->refcount == 0); + QLIST_REMOVE(exp, next); + exp->drv->delete(exp); + g_free(exp); + + aio_context_release(aio_context); +} + /* Callers must hold exp->ctx lock */ void blk_exp_unref(BlockExport *exp) { assert(exp->refcount > 0); if (--exp->refcount == 0) { - exp->drv->delete(exp); - g_free(exp); + /* Touch the block_exports list only in the main thread */ + aio_bh_schedule_oneshot(qemu_get_aio_context(), blk_exp_delete_bh, + exp); + } +} + +/* + * Drops the user reference to the export and requests that all client + * connections and other internally held references start to shut down. When + * the function returns, there may still be active references while the export + * is in the process of shutting down. + * + * Acquires exp->ctx internally. Callers must *not* hold the lock. + */ +void blk_exp_request_shutdown(BlockExport *exp) +{ + AioContext *aio_context = exp->ctx; + + aio_context_acquire(aio_context); + exp->drv->request_shutdown(exp); + aio_context_release(aio_context); +} + +/* + * Returns whether a block export of the given type exists. + * type == BLOCK_EXPORT_TYPE__MAX checks for an export of any type. + */ +static bool blk_exp_has_type(BlockExportType type) +{ + BlockExport *exp; + + if (type == BLOCK_EXPORT_TYPE__MAX) { + return !QLIST_EMPTY(&block_exports); + } + + QLIST_FOREACH(exp, &block_exports, next) { + if (exp->drv->type == type) { + return true; + } } + + return false; +} + +/* type == BLOCK_EXPORT_TYPE__MAX for all types */ +void blk_exp_close_all_type(BlockExportType type) +{ + BlockExport *exp, *next; + + assert(in_aio_context_home_thread(qemu_get_aio_context())); + + QLIST_FOREACH_SAFE(exp, &block_exports, next, next) { + if (type != BLOCK_EXPORT_TYPE__MAX && exp->drv->type != type) { + continue; + } + blk_exp_request_shutdown(exp); + } + + AIO_WAIT_WHILE(NULL, blk_exp_has_type(type)); +} + +void blk_exp_close_all(void) +{ + blk_exp_close_all_type(BLOCK_EXPORT_TYPE__MAX); } void qmp_block_export_add(BlockExportOptions *export, Error **errp) diff --git a/blockdev-nbd.c b/blockdev-nbd.c index b34f159888..f927264777 100644 --- a/blockdev-nbd.c +++ b/blockdev-nbd.c @@ -345,7 +345,7 @@ void qmp_nbd_server_stop(Error **errp) return; } - nbd_export_close_all(); + blk_exp_close_all_type(BLOCK_EXPORT_TYPE_NBD); nbd_server_free(nbd_server); nbd_server = NULL; diff --git a/nbd/server.c b/nbd/server.c index f31d8bbb60..32147e4871 100644 --- a/nbd/server.c +++ b/nbd/server.c @@ -100,8 +100,6 @@ struct NBDExport { }; static QTAILQ_HEAD(, NBDExport) exports = QTAILQ_HEAD_INITIALIZER(exports); -static QTAILQ_HEAD(, NBDExport) closed_exports = - QTAILQ_HEAD_INITIALIZER(closed_exports); /* NBDExportMetaContexts represents a list of contexts to be exported, * as selected by NBD_OPT_SET_META_CONTEXT. Also used for @@ -1494,12 +1492,8 @@ static void blk_aio_detach(void *opaque) static void nbd_eject_notifier(Notifier *n, void *data) { NBDExport *exp = container_of(n, NBDExport, eject_notifier); - AioContext *aio_context; - aio_context = exp->common.ctx; - aio_context_acquire(aio_context); - nbd_export_close(exp); - aio_context_release(aio_context); + blk_exp_request_shutdown(&exp->common); } void nbd_export_set_on_eject_blk(BlockExport *exp, BlockBackend *blk) @@ -1652,8 +1646,9 @@ nbd_export_aio_context(NBDExport *exp) return exp->common.ctx; } -void nbd_export_close(NBDExport *exp) +static void nbd_export_request_shutdown(BlockExport *blk_exp) { + NBDExport *exp = container_of(blk_exp, NBDExport, common); NBDClient *client, *next; blk_exp_ref(&exp->common); @@ -1672,7 +1667,6 @@ void nbd_export_close(NBDExport *exp) g_free(exp->name); exp->name = NULL; QTAILQ_REMOVE(&exports, exp, next); - QTAILQ_INSERT_TAIL(&closed_exports, exp, next); } blk_exp_unref(&exp->common); } @@ -1681,7 +1675,7 @@ void nbd_export_remove(NBDExport *exp, NbdServerRemoveMode mode, Error **errp) { ERRP_GUARD(); if (mode == NBD_SERVER_REMOVE_MODE_HARD || QTAILQ_EMPTY(&exp->clients)) { - nbd_export_close(exp); + nbd_export_request_shutdown(&exp->common); return; } @@ -1716,9 +1710,6 @@ static void nbd_export_delete(BlockExport *blk_exp) bdrv_dirty_bitmap_set_busy(exp->export_bitmap, false); g_free(exp->export_bitmap_context); } - - QTAILQ_REMOVE(&closed_exports, exp, next); - aio_wait_kick(); } const BlockExportDriver blk_exp_nbd = { @@ -1726,24 +1717,9 @@ const BlockExportDriver blk_exp_nbd = { .instance_size = sizeof(NBDExport), .create = nbd_export_create, .delete = nbd_export_delete, + .request_shutdown = nbd_export_request_shutdown, }; -void nbd_export_close_all(void) -{ - NBDExport *exp, *next; - AioContext *aio_context; - - QTAILQ_FOREACH_SAFE(exp, &exports, next, next) { - aio_context = exp->common.ctx; - aio_context_acquire(aio_context); - nbd_export_close(exp); - aio_context_release(aio_context); - } - - AIO_WAIT_WHILE(NULL, !(QTAILQ_EMPTY(&exports) && - QTAILQ_EMPTY(&closed_exports))); -} - static int coroutine_fn nbd_co_send_iov(NBDClient *client, struct iovec *iov, unsigned niov, Error **errp) { diff --git a/qemu-nbd.c b/qemu-nbd.c index 23c2b7da8e..c64f83618b 100644 --- a/qemu-nbd.c +++ b/qemu-nbd.c @@ -1119,7 +1119,7 @@ int main(int argc, char **argv) do { main_loop_wait(false); if (state == TERMINATE) { - nbd_export_close_all(); + blk_exp_close_all(); state = TERMINATED; } } while (state != TERMINATED); From patchwork Thu Sep 24 15:27:04 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kevin Wolf X-Patchwork-Id: 272823 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 B491FC4363D for ; 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Thu, 24 Sep 2020 11:28:12 -0400 X-MC-Unique: nBfJVxxmPoOPzJ7i4jjHfA-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 787BFAD509; Thu, 24 Sep 2020 15:28:02 +0000 (UTC) Received: from linux.fritz.box.com (ovpn-114-72.ams2.redhat.com [10.36.114.72]) by smtp.corp.redhat.com (Postfix) with ESMTP id 399E060C04; Thu, 24 Sep 2020 15:28:01 +0000 (UTC) From: Kevin Wolf To: qemu-block@nongnu.org Subject: [PATCH v2 18/31] block/export: Add 'id' option to block-export-add Date: Thu, 24 Sep 2020 17:27:04 +0200 Message-Id: <20200924152717.287415-19-kwolf@redhat.com> In-Reply-To: <20200924152717.287415-1-kwolf@redhat.com> References: <20200924152717.287415-1-kwolf@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=kwolf@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=63.128.21.124; envelope-from=kwolf@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/09/24 01:10:00 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -32 X-Spam_score: -3.3 X-Spam_bar: --- X-Spam_report: (-3.3 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1.199, 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_H5=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: kwolf@redhat.com, qemu-devel@nongnu.org, stefanha@redhat.com, mreitz@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" We'll need an id to identify block exports in monitor commands. This adds one. Note that this is different from the 'name' option in the NBD server, which is the externally visible export name. While block export ids need to be unique in the whole process, export names must be unique only for the same server. Different export types or (potentially in the future) multiple NBD servers can have the same export name externally, but still need different block export ids internally. Signed-off-by: Kevin Wolf Reviewed-by: Max Reitz --- qapi/block-export.json | 5 +++++ include/block/export.h | 3 +++ block/export/export.c | 26 ++++++++++++++++++++++++++ blockdev-nbd.c | 1 + qemu-nbd.c | 1 + storage-daemon/qemu-storage-daemon.c | 2 +- tests/qemu-iotests/223.out | 4 ++-- 7 files changed, 39 insertions(+), 3 deletions(-) diff --git a/qapi/block-export.json b/qapi/block-export.json index d20b3a085d..47c75a1794 100644 --- a/qapi/block-export.json +++ b/qapi/block-export.json @@ -105,6 +105,8 @@ # # Export a block node to QEMU's embedded NBD server. # +# The export name will be used as the id for the resulting block export. +# # Returns: error if the server is not running, or export with the same name # already exists. # @@ -182,6 +184,8 @@ # Describes a block export, i.e. how single node should be exported on an # external interface. # +# @id: A unique identifier for the block export (across all export types) +# # @node-name: The node name of the block node to be exported (since: 5.2) # # @writethrough: If true, caches are flushed after every write request to the @@ -192,6 +196,7 @@ ## { 'union': 'BlockExportOptions', 'base': { 'type': 'BlockExportType', + 'id': 'str', 'node-name': 'str', '*writethrough': 'bool' }, 'discriminator': 'type', diff --git a/include/block/export.h b/include/block/export.h index 6fffcb5651..cdc6e161ea 100644 --- a/include/block/export.h +++ b/include/block/export.h @@ -50,6 +50,9 @@ typedef struct BlockExportDriver { struct BlockExport { const BlockExportDriver *drv; + /* Unique identifier for the export */ + char *id; + /* * Reference count for this block export. This includes strong references * both from the owner (qemu-nbd or the monitor) and clients connected to diff --git a/block/export/export.c b/block/export/export.c index e94a68c183..7a4a78449a 100644 --- a/block/export/export.c +++ b/block/export/export.c @@ -19,6 +19,7 @@ #include "block/nbd.h" #include "qapi/error.h" #include "qapi/qapi-commands-block-export.h" +#include "qemu/id.h" static const BlockExportDriver *blk_exp_drivers[] = { &blk_exp_nbd, @@ -28,6 +29,19 @@ static const BlockExportDriver *blk_exp_drivers[] = { static QLIST_HEAD(, BlockExport) block_exports = QLIST_HEAD_INITIALIZER(block_exports); +static BlockExport *blk_exp_find(const char *id) +{ + BlockExport *exp; + + QLIST_FOREACH(exp, &block_exports, next) { + if (strcmp(id, exp->id) == 0) { + return exp; + } + } + + return NULL; +} + static const BlockExportDriver *blk_exp_find_driver(BlockExportType type) { int i; @@ -46,6 +60,15 @@ BlockExport *blk_exp_add(BlockExportOptions *export, Error **errp) BlockExport *exp; int ret; + if (!id_wellformed(export->id)) { + error_setg(errp, "Invalid block export id"); + return NULL; + } + if (blk_exp_find(export->id)) { + error_setg(errp, "Block export id '%s' is already in use", export->id); + return NULL; + } + drv = blk_exp_find_driver(export->type); if (!drv) { error_setg(errp, "No driver found for the requested export type"); @@ -57,10 +80,12 @@ BlockExport *blk_exp_add(BlockExportOptions *export, Error **errp) *exp = (BlockExport) { .drv = drv, .refcount = 1, + .id = g_strdup(export->id), }; ret = drv->create(exp, export, errp); if (ret < 0) { + g_free(exp->id); g_free(exp); return NULL; } @@ -87,6 +112,7 @@ static void blk_exp_delete_bh(void *opaque) assert(exp->refcount == 0); QLIST_REMOVE(exp, next); exp->drv->delete(exp); + g_free(exp->id); g_free(exp); aio_context_release(aio_context); diff --git a/blockdev-nbd.c b/blockdev-nbd.c index f927264777..814554dd90 100644 --- a/blockdev-nbd.c +++ b/blockdev-nbd.c @@ -269,6 +269,7 @@ void qmp_nbd_server_add(NbdServerAddOptions *arg, Error **errp) export_opts = g_new(BlockExportOptions, 1); *export_opts = (BlockExportOptions) { .type = BLOCK_EXPORT_TYPE_NBD, + .id = g_strdup(arg->name), .node_name = g_strdup(bdrv_get_node_name(bs)), .u.nbd = { .has_name = true, diff --git a/qemu-nbd.c b/qemu-nbd.c index c64f83618b..ac82acb4ac 100644 --- a/qemu-nbd.c +++ b/qemu-nbd.c @@ -1064,6 +1064,7 @@ int main(int argc, char **argv) export_opts = g_new(BlockExportOptions, 1); *export_opts = (BlockExportOptions) { .type = BLOCK_EXPORT_TYPE_NBD, + .id = g_strdup("qemu-nbd-export"), .node_name = g_strdup(bdrv_get_node_name(bs)), .has_writethrough = true, .writethrough = writethrough, diff --git a/storage-daemon/qemu-storage-daemon.c b/storage-daemon/qemu-storage-daemon.c index 0fcab6ed2d..e6157ff518 100644 --- a/storage-daemon/qemu-storage-daemon.c +++ b/storage-daemon/qemu-storage-daemon.c @@ -92,7 +92,7 @@ static void help(void) " --chardev configure a character device backend\n" " (see the qemu(1) man page for possible options)\n" "\n" -" --export [type=]nbd,device=[,name=]\n" +" --export [type=]nbd,device=,id=,[,name=]\n" " [,writable=on|off][,bitmap=]\n" " export the specified block node over NBD\n" " (requires --nbd-server)\n" diff --git a/tests/qemu-iotests/223.out b/tests/qemu-iotests/223.out index e1eaaedb55..31ce9e6fe0 100644 --- a/tests/qemu-iotests/223.out +++ b/tests/qemu-iotests/223.out @@ -45,7 +45,7 @@ exports available: 0 {"execute":"nbd-server-add", "arguments":{"device":"nosuch"}} {"error": {"class": "GenericError", "desc": "Cannot find device=nosuch nor node_name=nosuch"}} {"execute":"nbd-server-add", "arguments":{"device":"n"}} -{"error": {"class": "GenericError", "desc": "NBD server already has export named 'n'"}} +{"error": {"class": "GenericError", "desc": "Block export id 'n' is already in use"}} {"execute":"nbd-server-add", "arguments":{"device":"n", "name":"n2", "bitmap":"b2"}} {"error": {"class": "GenericError", "desc": "Enabled bitmap 'b2' incompatible with readonly export"}} {"execute":"nbd-server-add", "arguments":{"device":"n", "name":"n2", "bitmap":"b3"}} @@ -126,7 +126,7 @@ exports available: 0 {"execute":"nbd-server-add", "arguments":{"device":"nosuch"}} {"error": {"class": "GenericError", "desc": "Cannot find device=nosuch nor node_name=nosuch"}} {"execute":"nbd-server-add", "arguments":{"device":"n"}} -{"error": {"class": "GenericError", "desc": "NBD server already has export named 'n'"}} +{"error": {"class": "GenericError", "desc": "Block export id 'n' is already in use"}} {"execute":"nbd-server-add", "arguments":{"device":"n", "name":"n2", "bitmap":"b2"}} {"error": {"class": "GenericError", "desc": "Enabled bitmap 'b2' incompatible with readonly export"}} {"execute":"nbd-server-add", "arguments":{"device":"n", "name":"n2", "bitmap":"b3"}} From patchwork Thu Sep 24 15:27:05 2020 Content-Type: text/plain; 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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]:53640 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kLTc0-0003Rg-HB for qemu-devel@archiver.kernel.org; Thu, 24 Sep 2020 11:56:48 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:49050) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kLTAI-0001gW-Jg for qemu-devel@nongnu.org; Thu, 24 Sep 2020 11:28:10 -0400 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:52286) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1kLTAG-0005YV-V1 for qemu-devel@nongnu.org; Thu, 24 Sep 2020 11:28:10 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1600961288; 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=Z7b25CPuto5mkDJPwxs9+TNN8zWlqsKC0XlepxQPtqM=; b=IEpKtTQK/kWXNwQwfnKcNGULnfLSDc2/SojvR3ScCuXtS+gjfHEbf7ji2MAyN5mNUFHneb HgovgOQC/TBAZm0oKQEX0O9otZs6AECpQ9fYnjdKvCV0Kdj8UrPCaFKuw2IKThx2o/mFgh eXRD+SxcKfIV+9RMQv8lmBdCn1UJk8o= 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-363-sFv5NQyFMV2XPXy7OxkdLA-1; Thu, 24 Sep 2020 11:28:05 -0400 X-MC-Unique: sFv5NQyFMV2XPXy7OxkdLA-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 0C6DF81F00F; Thu, 24 Sep 2020 15:28:04 +0000 (UTC) Received: from linux.fritz.box.com (ovpn-114-72.ams2.redhat.com [10.36.114.72]) by smtp.corp.redhat.com (Postfix) with ESMTP id C0D4A60C04; Thu, 24 Sep 2020 15:28:02 +0000 (UTC) From: Kevin Wolf To: qemu-block@nongnu.org Subject: [PATCH v2 19/31] block/export: Move strong user reference to block_exports Date: Thu, 24 Sep 2020 17:27:05 +0200 Message-Id: <20200924152717.287415-20-kwolf@redhat.com> In-Reply-To: <20200924152717.287415-1-kwolf@redhat.com> References: <20200924152717.287415-1-kwolf@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=kwolf@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=216.205.24.124; envelope-from=kwolf@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/09/22 23:02:20 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -32 X-Spam_score: -3.3 X-Spam_bar: --- X-Spam_report: (-3.3 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1.199, 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_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable 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: kwolf@redhat.com, qemu-devel@nongnu.org, stefanha@redhat.com, mreitz@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" The reference owned by the user/monitor that is created when adding the export and dropped when removing it was tied to the 'exports' list in nbd/server.c. Every block export will have a user reference, so move it to the block export level and tie it to the 'block_exports' list in block/export/export.c instead. This is necessary for introducing a QMP command for removing exports. Note that exports are present in block_exports even after the user has requested shutdown. This is different from NBD's exports where exports are immediately removed on a shutdown request, even if they are still in the process of shutting down. In order to avoid that the user still interacts with an export that is shutting down (and possibly removes it a second time), we need to remember if the user actually still owns it. Signed-off-by: Kevin Wolf Reviewed-by: Max Reitz --- include/block/export.h | 8 ++++++++ block/export/export.c | 6 ++++++ blockdev-nbd.c | 5 ----- nbd/server.c | 2 -- 4 files changed, 14 insertions(+), 7 deletions(-) diff --git a/include/block/export.h b/include/block/export.h index cdc6e161ea..4833947e89 100644 --- a/include/block/export.h +++ b/include/block/export.h @@ -60,6 +60,14 @@ struct BlockExport { */ int refcount; + /* + * True if one of the references in refcount belongs to the user. After the + * user has dropped their reference, they may not e.g. remove the same + * export a second time (which would decrease the refcount without having + * it incremented first). + */ + bool user_owned; + /* The AioContext whose lock protects this BlockExport object. */ AioContext *ctx; diff --git a/block/export/export.c b/block/export/export.c index 7a4a78449a..62699dfa05 100644 --- a/block/export/export.c +++ b/block/export/export.c @@ -80,6 +80,7 @@ BlockExport *blk_exp_add(BlockExportOptions *export, Error **errp) *exp = (BlockExport) { .drv = drv, .refcount = 1, + .user_owned = true, .id = g_strdup(export->id), }; @@ -143,6 +144,11 @@ void blk_exp_request_shutdown(BlockExport *exp) aio_context_acquire(aio_context); exp->drv->request_shutdown(exp); + + assert(exp->user_owned); + exp->user_owned = false; + blk_exp_unref(exp); + aio_context_release(aio_context); } diff --git a/blockdev-nbd.c b/blockdev-nbd.c index 814554dd90..9efbaef8f7 100644 --- a/blockdev-nbd.c +++ b/blockdev-nbd.c @@ -235,11 +235,6 @@ int nbd_export_create(BlockExport *exp, BlockExportOptions *exp_args, goto out; } - /* The list of named exports has a strong reference to this export now and - * our only way of accessing it is through nbd_export_find(), so we can drop - * the strong reference that is @exp. */ - blk_exp_unref(exp); - ret = 0; out: aio_context_release(aio_context); diff --git a/nbd/server.c b/nbd/server.c index 32147e4871..22a1d66168 100644 --- a/nbd/server.c +++ b/nbd/server.c @@ -1616,7 +1616,6 @@ int nbd_export_new(BlockExport *blk_exp, BlockDriverState *bs, blk_add_aio_context_notifier(blk, blk_aio_attached, blk_aio_detach, exp); - blk_exp_ref(&exp->common); QTAILQ_INSERT_TAIL(&exports, exp, next); return 0; @@ -1663,7 +1662,6 @@ static void nbd_export_request_shutdown(BlockExport *blk_exp) client_close(client, true); } if (exp->name) { - blk_exp_unref(&exp->common); g_free(exp->name); exp->name = NULL; QTAILQ_REMOVE(&exports, exp, next); From patchwork Thu Sep 24 15:27:06 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kevin Wolf X-Patchwork-Id: 272819 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 C144BC4363D for ; 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Thu, 24 Sep 2020 11:28:06 -0400 X-MC-Unique: rhfmw1vWM-ynInqd80qBHQ-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 95E8B88EF22; Thu, 24 Sep 2020 15:28:05 +0000 (UTC) Received: from linux.fritz.box.com (ovpn-114-72.ams2.redhat.com [10.36.114.72]) by smtp.corp.redhat.com (Postfix) with ESMTP id 54D6D60C04; Thu, 24 Sep 2020 15:28:04 +0000 (UTC) From: Kevin Wolf To: qemu-block@nongnu.org Subject: [PATCH v2 20/31] block/export: Add block-export-del Date: Thu, 24 Sep 2020 17:27:06 +0200 Message-Id: <20200924152717.287415-21-kwolf@redhat.com> In-Reply-To: <20200924152717.287415-1-kwolf@redhat.com> References: <20200924152717.287415-1-kwolf@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=kwolf@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=63.128.21.124; envelope-from=kwolf@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/09/24 01:10:00 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -32 X-Spam_score: -3.3 X-Spam_bar: --- X-Spam_report: (-3.3 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1.199, 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_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable 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: kwolf@redhat.com, qemu-devel@nongnu.org, stefanha@redhat.com, mreitz@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Implement a new QMP command block-export-del and make nbd-server-remove a wrapper around it. Signed-off-by: Kevin Wolf Reviewed-by: Max Reitz --- qapi/block-export.json | 32 ++++++++++++++++++++----- include/block/export.h | 1 + include/block/nbd.h | 1 - block/export/export.c | 43 +++++++++++++++++++++++++++++++++- block/monitor/block-hmp-cmds.c | 4 ++-- blockdev-nbd.c | 25 +++++--------------- nbd/server.c | 14 ----------- 7 files changed, 77 insertions(+), 43 deletions(-) diff --git a/qapi/block-export.json b/qapi/block-export.json index 47c75a1794..0ba4d84c97 100644 --- a/qapi/block-export.json +++ b/qapi/block-export.json @@ -116,9 +116,9 @@ 'data': 'NbdServerAddOptions', 'boxed': true } ## -# @NbdServerRemoveMode: +# @BlockExportRemoveMode: # -# Mode for removing an NBD export. +# Mode for removing a block export. # # @safe: Remove export if there are no existing connections, fail otherwise. # @@ -134,16 +134,16 @@ # # Since: 2.12 ## -{'enum': 'NbdServerRemoveMode', 'data': ['safe', 'hard']} +{'enum': 'BlockExportRemoveMode', 'data': ['safe', 'hard']} ## # @nbd-server-remove: # # Remove NBD export by name. # -# @name: Export name. +# @name: Block export id. # -# @mode: Mode of command operation. See @NbdServerRemoveMode description. +# @mode: Mode of command operation. See @BlockExportRemoveMode description. # Default is 'safe'. # # Returns: error if @@ -154,7 +154,7 @@ # Since: 2.12 ## { 'command': 'nbd-server-remove', - 'data': {'name': 'str', '*mode': 'NbdServerRemoveMode'} } + 'data': {'name': 'str', '*mode': 'BlockExportRemoveMode'} } ## # @nbd-server-stop: @@ -213,3 +213,23 @@ ## { 'command': 'block-export-add', 'data': 'BlockExportOptions', 'boxed': true } + +## +# @block-export-del: +# +# Request to remove a block export. This drops the user's reference to the +# export, but the export may still stay around after this command returns until +# the shutdown of the export has completed. +# +# @id: Block export id. +# +# @mode: Mode of command operation. See @BlockExportRemoveMode description. +# Default is 'safe'. +# +# Returns: Error if the export is not found or @mode is 'safe' and the export +# is still in use (e.g. by existing client connections) +# +# Since: 5.2 +## +{ 'command': 'block-export-del', + 'data': { 'id': 'str', '*mode': 'BlockExportRemoveMode' } } diff --git a/include/block/export.h b/include/block/export.h index 4833947e89..ff54d35872 100644 --- a/include/block/export.h +++ b/include/block/export.h @@ -76,6 +76,7 @@ struct BlockExport { }; BlockExport *blk_exp_add(BlockExportOptions *export, Error **errp); +BlockExport *blk_exp_find(const char *id); void blk_exp_ref(BlockExport *exp); void blk_exp_unref(BlockExport *exp); void blk_exp_request_shutdown(BlockExport *exp); diff --git a/include/block/nbd.h b/include/block/nbd.h index 0b9f3e5d4e..a4dc1f9e54 100644 --- a/include/block/nbd.h +++ b/include/block/nbd.h @@ -337,7 +337,6 @@ int nbd_export_new(BlockExport *blk_exp, BlockDriverState *bs, const char *bitmap, bool readonly, bool shared, bool writethrough, Error **errp); void nbd_export_set_on_eject_blk(BlockExport *exp, BlockBackend *blk); -void nbd_export_remove(NBDExport *exp, NbdServerRemoveMode mode, Error **errp); AioContext *nbd_export_aio_context(NBDExport *exp); NBDExport *nbd_export_find(const char *name); diff --git a/block/export/export.c b/block/export/export.c index 62699dfa05..d186beffe9 100644 --- a/block/export/export.c +++ b/block/export/export.c @@ -29,7 +29,7 @@ static const BlockExportDriver *blk_exp_drivers[] = { static QLIST_HEAD(, BlockExport) block_exports = QLIST_HEAD_INITIALIZER(block_exports); -static BlockExport *blk_exp_find(const char *id) +BlockExport *blk_exp_find(const char *id) { BlockExport *exp; @@ -143,12 +143,23 @@ void blk_exp_request_shutdown(BlockExport *exp) AioContext *aio_context = exp->ctx; aio_context_acquire(aio_context); + + /* + * If the user doesn't own the export any more, it is already shutting + * down. We must not call .request_shutdown and decrease the refcount a + * second time. + */ + if (!exp->user_owned) { + goto out; + } + exp->drv->request_shutdown(exp); assert(exp->user_owned); exp->user_owned = false; blk_exp_unref(exp); +out: aio_context_release(aio_context); } @@ -199,3 +210,33 @@ void qmp_block_export_add(BlockExportOptions *export, Error **errp) { blk_exp_add(export, errp); } + +void qmp_block_export_del(const char *id, + bool has_mode, BlockExportRemoveMode mode, + Error **errp) +{ + ERRP_GUARD(); + BlockExport *exp; + + exp = blk_exp_find(id); + if (exp == NULL) { + error_setg(errp, "Export '%s' is not found", id); + return; + } + if (!exp->user_owned) { + error_setg(errp, "Export '%s' is already shutting down", id); + return; + } + + if (!has_mode) { + mode = BLOCK_EXPORT_REMOVE_MODE_SAFE; + } + if (mode == BLOCK_EXPORT_REMOVE_MODE_SAFE && exp->refcount > 1) { + error_setg(errp, "export '%s' still in use", exp->id); + error_append_hint(errp, "Use mode='hard' to force client " + "disconnect\n"); + return; + } + + blk_exp_request_shutdown(exp); +} diff --git a/block/monitor/block-hmp-cmds.c b/block/monitor/block-hmp-cmds.c index db357cafcb..d15a2be827 100644 --- a/block/monitor/block-hmp-cmds.c +++ b/block/monitor/block-hmp-cmds.c @@ -476,8 +476,8 @@ void hmp_nbd_server_remove(Monitor *mon, const QDict *qdict) bool force = qdict_get_try_bool(qdict, "force", false); Error *err = NULL; - /* Rely on NBD_SERVER_REMOVE_MODE_SAFE being the default */ - qmp_nbd_server_remove(name, force, NBD_SERVER_REMOVE_MODE_HARD, &err); + /* Rely on BLOCK_EXPORT_REMOVE_MODE_SAFE being the default */ + qmp_nbd_server_remove(name, force, BLOCK_EXPORT_REMOVE_MODE_HARD, &err); hmp_handle_error(mon, err); } diff --git a/blockdev-nbd.c b/blockdev-nbd.c index 9efbaef8f7..4a9a1be571 100644 --- a/blockdev-nbd.c +++ b/blockdev-nbd.c @@ -307,31 +307,18 @@ fail: } void qmp_nbd_server_remove(const char *name, - bool has_mode, NbdServerRemoveMode mode, + bool has_mode, BlockExportRemoveMode mode, Error **errp) { - NBDExport *exp; - AioContext *aio_context; - - if (!nbd_server) { - error_setg(errp, "NBD server not running"); - return; - } + BlockExport *exp; - exp = nbd_export_find(name); - if (exp == NULL) { - error_setg(errp, "Export '%s' is not found", name); + exp = blk_exp_find(name); + if (exp && exp->drv->type != BLOCK_EXPORT_TYPE_NBD) { + error_setg(errp, "Block export '%s' is not an NBD export", name); return; } - if (!has_mode) { - mode = NBD_SERVER_REMOVE_MODE_SAFE; - } - - aio_context = nbd_export_aio_context(exp); - aio_context_acquire(aio_context); - nbd_export_remove(exp, mode, errp); - aio_context_release(aio_context); + qmp_block_export_del(name, has_mode, mode, errp); } void qmp_nbd_server_stop(Error **errp) diff --git a/nbd/server.c b/nbd/server.c index 22a1d66168..1a0e1db401 100644 --- a/nbd/server.c +++ b/nbd/server.c @@ -1669,20 +1669,6 @@ static void nbd_export_request_shutdown(BlockExport *blk_exp) blk_exp_unref(&exp->common); } -void nbd_export_remove(NBDExport *exp, NbdServerRemoveMode mode, Error **errp) -{ - ERRP_GUARD(); - if (mode == NBD_SERVER_REMOVE_MODE_HARD || QTAILQ_EMPTY(&exp->clients)) { - nbd_export_request_shutdown(&exp->common); - return; - } - - assert(mode == NBD_SERVER_REMOVE_MODE_SAFE); - - error_setg(errp, "export '%s' still in use", exp->name); - error_append_hint(errp, "Use mode='hard' to force client disconnect\n"); -} - static void nbd_export_delete(BlockExport *blk_exp) { NBDExport *exp = container_of(blk_exp, NBDExport, common); From patchwork Thu Sep 24 15:27:07 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kevin Wolf X-Patchwork-Id: 272822 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 BAF7FC4727D for ; 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Thu, 24 Sep 2020 11:28:14 -0400 X-MC-Unique: hV10kG2iNg6DAr5AlD2UjQ-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 28A10884DDA; Thu, 24 Sep 2020 15:28:07 +0000 (UTC) Received: from linux.fritz.box.com (ovpn-114-72.ams2.redhat.com [10.36.114.72]) by smtp.corp.redhat.com (Postfix) with ESMTP id DDD9460C04; Thu, 24 Sep 2020 15:28:05 +0000 (UTC) From: Kevin Wolf To: qemu-block@nongnu.org Subject: [PATCH v2 21/31] block/export: Add BLOCK_EXPORT_DELETED event Date: Thu, 24 Sep 2020 17:27:07 +0200 Message-Id: <20200924152717.287415-22-kwolf@redhat.com> In-Reply-To: <20200924152717.287415-1-kwolf@redhat.com> References: <20200924152717.287415-1-kwolf@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=kwolf@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=63.128.21.124; envelope-from=kwolf@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/09/24 01:10:00 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -32 X-Spam_score: -3.3 X-Spam_bar: --- X-Spam_report: (-3.3 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1.199, 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_H5=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: kwolf@redhat.com, qemu-devel@nongnu.org, stefanha@redhat.com, mreitz@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Clients may want to know when an export has finally disappeard (block-export-del returns earlier than that in the general case), so add a QAPI event for it. Signed-off-by: Kevin Wolf Reviewed-by: Max Reitz --- qapi/block-export.json | 12 ++++++++++++ block/export/export.c | 2 ++ tests/qemu-iotests/140 | 9 ++++++++- tests/qemu-iotests/140.out | 2 +- tests/qemu-iotests/223.out | 4 ++++ 5 files changed, 27 insertions(+), 2 deletions(-) diff --git a/qapi/block-export.json b/qapi/block-export.json index 0ba4d84c97..3551c2e748 100644 --- a/qapi/block-export.json +++ b/qapi/block-export.json @@ -233,3 +233,15 @@ ## { 'command': 'block-export-del', 'data': { 'id': 'str', '*mode': 'BlockExportRemoveMode' } } + +## +# @BLOCK_EXPORT_DELETED: +# +# Emitted when a block export is removed and its id can be reused. +# +# @id: Block export id. +# +# Since: 5.2 +## +{ 'event': 'BLOCK_EXPORT_DELETED', + 'data': { 'id': 'str' } } diff --git a/block/export/export.c b/block/export/export.c index d186beffe9..87940d5c40 100644 --- a/block/export/export.c +++ b/block/export/export.c @@ -19,6 +19,7 @@ #include "block/nbd.h" #include "qapi/error.h" #include "qapi/qapi-commands-block-export.h" +#include "qapi/qapi-events-block-export.h" #include "qemu/id.h" static const BlockExportDriver *blk_exp_drivers[] = { @@ -113,6 +114,7 @@ static void blk_exp_delete_bh(void *opaque) assert(exp->refcount == 0); QLIST_REMOVE(exp, next); exp->drv->delete(exp); + qapi_event_send_block_export_deleted(exp->id); g_free(exp->id); g_free(exp); diff --git a/tests/qemu-iotests/140 b/tests/qemu-iotests/140 index 8d2ce5d9e3..309b177e77 100755 --- a/tests/qemu-iotests/140 +++ b/tests/qemu-iotests/140 @@ -81,10 +81,17 @@ $QEMU_IO_PROG -f raw -r -c 'read -P 42 0 64k' \ "nbd+unix:///drv?socket=$SOCK_DIR/nbd" 2>&1 \ | _filter_qemu_io | _filter_nbd +# The order of 'return' and the BLOCK_EXPORT_DELETED event is undefined. Just +# wait until we've twice seen one of them. Filter the 'return' line out so that +# the output is defined. _send_qemu_cmd $QEMU_HANDLE \ "{ 'execute': 'eject', 'arguments': { 'device': 'drv' }}" \ - 'return' + 'return\|BLOCK_EXPORT_DELETED' | + grep -v 'return' + +_send_qemu_cmd $QEMU_HANDLE '' 'return\|BLOCK_EXPORT_DELETED' | + grep -v 'return' $QEMU_IO_PROG -f raw -r -c close \ "nbd+unix:///drv?socket=$SOCK_DIR/nbd" 2>&1 \ diff --git a/tests/qemu-iotests/140.out b/tests/qemu-iotests/140.out index 86b985da75..62d9c3ab3c 100644 --- a/tests/qemu-iotests/140.out +++ b/tests/qemu-iotests/140.out @@ -11,7 +11,7 @@ wrote 65536/65536 bytes at offset 0 read 65536/65536 bytes at offset 0 64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) { 'execute': 'eject', 'arguments': { 'device': 'drv' }} -{"return": {}} +{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "BLOCK_EXPORT_DELETED", "data": {"id": "drv"}} qemu-io: can't open device nbd+unix:///drv?socket=SOCK_DIR/nbd: Requested export not available server reported: export 'drv' not present { 'execute': 'quit' } diff --git a/tests/qemu-iotests/223.out b/tests/qemu-iotests/223.out index 31ce9e6fe0..f6eac23f04 100644 --- a/tests/qemu-iotests/223.out +++ b/tests/qemu-iotests/223.out @@ -102,8 +102,10 @@ read 2097152/2097152 bytes at offset 2097152 {"execute":"nbd-server-remove", "arguments":{"name":"n"}} {"return": {}} {"execute":"nbd-server-remove", "arguments":{"name":"n2"}} +{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "BLOCK_EXPORT_DELETED", "data": {"id": "n"}} {"return": {}} {"execute":"nbd-server-remove", "arguments":{"name":"n2"}} +{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "BLOCK_EXPORT_DELETED", "data": {"id": "n2"}} {"error": {"class": "GenericError", "desc": "Export 'n2' is not found"}} {"execute":"nbd-server-stop"} {"return": {}} @@ -183,8 +185,10 @@ read 2097152/2097152 bytes at offset 2097152 {"execute":"nbd-server-remove", "arguments":{"name":"n"}} {"return": {}} {"execute":"nbd-server-remove", "arguments":{"name":"n2"}} +{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "BLOCK_EXPORT_DELETED", "data": {"id": "n"}} {"return": {}} {"execute":"nbd-server-remove", "arguments":{"name":"n2"}} +{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "BLOCK_EXPORT_DELETED", "data": {"id": "n2"}} {"error": {"class": "GenericError", "desc": "Export 'n2' is not found"}} {"execute":"nbd-server-stop"} {"return": {}} From patchwork Thu Sep 24 15:27:08 2020 Content-Type: text/plain; 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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]:39416 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kLTkp-0002YQ-OR for qemu-devel@archiver.kernel.org; Thu, 24 Sep 2020 12:05:55 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:49166) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kLTAO-0001uv-DQ for qemu-devel@nongnu.org; Thu, 24 Sep 2020 11:28:16 -0400 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:23688) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1kLTAL-0005ZQ-1H for qemu-devel@nongnu.org; Thu, 24 Sep 2020 11:28:16 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1600961292; 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=aZHSOyBKEHwiJS9MsaOADdNyCp6EdrfkFm7tC5uXzl0=; b=J97dWPkGP9exGH7aVbD6ZttrcnS9b1LCEiqmDrvpe2r4pwavuHM+iJBUDUwXeRKQlU/Y41 kjbPIk8P52SkzuhSn8SA53n4SREhIpUfjKgXVWy5O6Ty/iB0ElUn5l5FTgI+djZlTBIlsp hKbvo6vTh7nbGqnCamdSdaNmR29IVGg= 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-21-ojNU__GVOcKzdBHOG8DRmw-1; Thu, 24 Sep 2020 11:28:09 -0400 X-MC-Unique: ojNU__GVOcKzdBHOG8DRmw-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id B13731021D29; Thu, 24 Sep 2020 15:28:08 +0000 (UTC) Received: from linux.fritz.box.com (ovpn-114-72.ams2.redhat.com [10.36.114.72]) by smtp.corp.redhat.com (Postfix) with ESMTP id 70EFD60C04; Thu, 24 Sep 2020 15:28:07 +0000 (UTC) From: Kevin Wolf To: qemu-block@nongnu.org Subject: [PATCH v2 22/31] block/export: Move blk to BlockExport Date: Thu, 24 Sep 2020 17:27:08 +0200 Message-Id: <20200924152717.287415-23-kwolf@redhat.com> In-Reply-To: <20200924152717.287415-1-kwolf@redhat.com> References: <20200924152717.287415-1-kwolf@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=kwolf@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=216.205.24.124; envelope-from=kwolf@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/09/22 23:02:20 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -32 X-Spam_score: -3.3 X-Spam_bar: --- X-Spam_report: (-3.3 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1.199, 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_H5=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: kwolf@redhat.com, qemu-devel@nongnu.org, stefanha@redhat.com, mreitz@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Every block export has a BlockBackend representing the disk that is exported. It should live in BlockExport therefore. Signed-off-by: Kevin Wolf Reviewed-by: Max Reitz --- include/block/export.h | 3 +++ block/export/export.c | 3 +++ nbd/server.c | 43 +++++++++++++++++++++--------------------- 3 files changed, 28 insertions(+), 21 deletions(-) diff --git a/include/block/export.h b/include/block/export.h index ff54d35872..7feb02e10d 100644 --- a/include/block/export.h +++ b/include/block/export.h @@ -71,6 +71,9 @@ struct BlockExport { /* The AioContext whose lock protects this BlockExport object. */ AioContext *ctx; + /* The block device to export */ + BlockBackend *blk; + /* List entry for block_exports */ QLIST_ENTRY(BlockExport) next; }; diff --git a/block/export/export.c b/block/export/export.c index 87940d5c40..ad374a6649 100644 --- a/block/export/export.c +++ b/block/export/export.c @@ -92,6 +92,8 @@ BlockExport *blk_exp_add(BlockExportOptions *export, Error **errp) return NULL; } + assert(exp->blk != NULL); + QLIST_INSERT_HEAD(&block_exports, exp, next); return exp; } @@ -114,6 +116,7 @@ static void blk_exp_delete_bh(void *opaque) assert(exp->refcount == 0); QLIST_REMOVE(exp, next); exp->drv->delete(exp); + blk_unref(exp->blk); qapi_event_send_block_export_deleted(exp->id); g_free(exp->id); g_free(exp); diff --git a/nbd/server.c b/nbd/server.c index 1a0e1db401..f9af45c480 100644 --- a/nbd/server.c +++ b/nbd/server.c @@ -84,7 +84,6 @@ struct NBDRequestData { struct NBDExport { BlockExport common; - BlockBackend *blk; char *name; char *description; uint64_t size; @@ -643,7 +642,7 @@ static int nbd_negotiate_handle_info(NBDClient *client, Error **errp) * whether this is OPT_INFO or OPT_GO. */ /* minimum - 1 for back-compat, or actual if client will obey it. */ if (client->opt == NBD_OPT_INFO || blocksize) { - check_align = sizes[0] = blk_get_request_alignment(exp->blk); + check_align = sizes[0] = blk_get_request_alignment(exp->common.blk); } else { sizes[0] = 1; } @@ -652,7 +651,7 @@ static int nbd_negotiate_handle_info(NBDClient *client, Error **errp) * TODO: is blk_bs(blk)->bl.opt_transfer appropriate? */ sizes[1] = MAX(4096, sizes[0]); /* maximum - At most 32M, but smaller as appropriate. */ - sizes[2] = MIN(blk_get_max_transfer(exp->blk), NBD_MAX_BUFFER_SIZE); + sizes[2] = MIN(blk_get_max_transfer(exp->common.blk), NBD_MAX_BUFFER_SIZE); trace_nbd_negotiate_handle_info_block_size(sizes[0], sizes[1], sizes[2]); sizes[0] = cpu_to_be32(sizes[0]); sizes[1] = cpu_to_be32(sizes[1]); @@ -684,7 +683,7 @@ static int nbd_negotiate_handle_info(NBDClient *client, Error **errp) * tolerate all clients, regardless of alignments. */ if (client->opt == NBD_OPT_INFO && !blocksize && - blk_get_request_alignment(exp->blk) > 1) { + blk_get_request_alignment(exp->common.blk) > 1) { return nbd_negotiate_send_rep_err(client, NBD_REP_ERR_BLOCK_SIZE_REQD, errp, @@ -1557,7 +1556,7 @@ int nbd_export_new(BlockExport *blk_exp, BlockDriverState *bs, blk_set_allow_aio_context_change(blk, true); QTAILQ_INIT(&exp->clients); - exp->blk = blk; + exp->common.blk = blk; exp->name = g_strdup(name); assert(!desc || strlen(desc) <= NBD_MAX_STRING_SIZE); exp->description = g_strdup(desc); @@ -1679,15 +1678,13 @@ static void nbd_export_delete(BlockExport *blk_exp) g_free(exp->description); exp->description = NULL; - if (exp->blk) { + if (exp->common.blk) { if (exp->eject_notifier_blk) { notifier_remove(&exp->eject_notifier); blk_unref(exp->eject_notifier_blk); } - blk_remove_aio_context_notifier(exp->blk, blk_aio_attached, + blk_remove_aio_context_notifier(exp->common.blk, blk_aio_attached, blk_aio_detach, exp); - blk_unref(exp->blk); - exp->blk = NULL; } if (exp->export_bitmap) { @@ -1840,7 +1837,7 @@ static int coroutine_fn nbd_co_send_sparse_read(NBDClient *client, while (progress < size) { int64_t pnum; - int status = bdrv_block_status_above(blk_bs(exp->blk), NULL, + int status = bdrv_block_status_above(blk_bs(exp->common.blk), NULL, offset + progress, size - progress, &pnum, NULL, NULL); @@ -1872,7 +1869,8 @@ static int coroutine_fn nbd_co_send_sparse_read(NBDClient *client, stl_be_p(&chunk.length, pnum); ret = nbd_co_send_iov(client, iov, 1, errp); } else { - ret = blk_pread(exp->blk, offset + progress, data + progress, pnum); + ret = blk_pread(exp->common.blk, offset + progress, + data + progress, pnum); if (ret < 0) { error_setg_errno(errp, -ret, "reading from file failed"); break; @@ -2136,7 +2134,8 @@ static int nbd_co_receive_request(NBDRequestData *req, NBDRequest *request, } if (request->type != NBD_CMD_CACHE) { - req->data = blk_try_blockalign(client->exp->blk, request->len); + req->data = blk_try_blockalign(client->exp->common.blk, + request->len); if (req->data == NULL) { error_setg(errp, "No memory"); return -ENOMEM; @@ -2232,7 +2231,7 @@ static coroutine_fn int nbd_do_cmd_read(NBDClient *client, NBDRequest *request, /* XXX: NBD Protocol only documents use of FUA with WRITE */ if (request->flags & NBD_CMD_FLAG_FUA) { - ret = blk_co_flush(exp->blk); + ret = blk_co_flush(exp->common.blk); if (ret < 0) { return nbd_send_generic_reply(client, request->handle, ret, "flush failed", errp); @@ -2246,7 +2245,7 @@ static coroutine_fn int nbd_do_cmd_read(NBDClient *client, NBDRequest *request, data, request->len, errp); } - ret = blk_pread(exp->blk, request->from, data, request->len); + ret = blk_pread(exp->common.blk, request->from, data, request->len); if (ret < 0) { return nbd_send_generic_reply(client, request->handle, ret, "reading from file failed", errp); @@ -2281,7 +2280,7 @@ static coroutine_fn int nbd_do_cmd_cache(NBDClient *client, NBDRequest *request, assert(request->type == NBD_CMD_CACHE); - ret = blk_co_preadv(exp->blk, request->from, request->len, + ret = blk_co_preadv(exp->common.blk, request->from, request->len, NULL, BDRV_REQ_COPY_ON_READ | BDRV_REQ_PREFETCH); return nbd_send_generic_reply(client, request->handle, ret, @@ -2312,7 +2311,8 @@ static coroutine_fn int nbd_handle_request(NBDClient *client, if (request->flags & NBD_CMD_FLAG_FUA) { flags |= BDRV_REQ_FUA; } - ret = blk_pwrite(exp->blk, request->from, data, request->len, flags); + ret = blk_pwrite(exp->common.blk, request->from, data, request->len, + flags); return nbd_send_generic_reply(client, request->handle, ret, "writing to file failed", errp); @@ -2333,7 +2333,7 @@ static coroutine_fn int nbd_handle_request(NBDClient *client, int align = client->check_align ?: 1; int len = MIN(request->len, QEMU_ALIGN_DOWN(BDRV_REQUEST_MAX_BYTES, align)); - ret = blk_pwrite_zeroes(exp->blk, request->from, len, flags); + ret = blk_pwrite_zeroes(exp->common.blk, request->from, len, flags); request->len -= len; request->from += len; } @@ -2345,7 +2345,7 @@ static coroutine_fn int nbd_handle_request(NBDClient *client, abort(); case NBD_CMD_FLUSH: - ret = blk_co_flush(exp->blk); + ret = blk_co_flush(exp->common.blk); return nbd_send_generic_reply(client, request->handle, ret, "flush failed", errp); @@ -2356,12 +2356,12 @@ static coroutine_fn int nbd_handle_request(NBDClient *client, int align = client->check_align ?: 1; int len = MIN(request->len, QEMU_ALIGN_DOWN(BDRV_REQUEST_MAX_BYTES, align)); - ret = blk_co_pdiscard(exp->blk, request->from, len); + ret = blk_co_pdiscard(exp->common.blk, request->from, len); request->len -= len; request->from += len; } if (ret >= 0 && request->flags & NBD_CMD_FLAG_FUA) { - ret = blk_co_flush(exp->blk); + ret = blk_co_flush(exp->common.blk); } return nbd_send_generic_reply(client, request->handle, ret, "discard failed", errp); @@ -2379,7 +2379,8 @@ static coroutine_fn int nbd_handle_request(NBDClient *client, if (client->export_meta.base_allocation) { ret = nbd_co_send_block_status(client, request->handle, - blk_bs(exp->blk), request->from, + blk_bs(exp->common.blk), + request->from, request->len, dont_fragment, !client->export_meta.bitmap, NBD_META_ID_BASE_ALLOCATION, From patchwork Thu Sep 24 15:27:09 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kevin Wolf X-Patchwork-Id: 304501 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 CFA50C4346E for ; 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Thu, 24 Sep 2020 11:28:17 -0400 X-MC-Unique: CpoUiRggPTiCZYhc1A_ITA-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 4631789CD14; Thu, 24 Sep 2020 15:28:10 +0000 (UTC) Received: from linux.fritz.box.com (ovpn-114-72.ams2.redhat.com [10.36.114.72]) by smtp.corp.redhat.com (Postfix) with ESMTP id 05A7F60C04; Thu, 24 Sep 2020 15:28:08 +0000 (UTC) From: Kevin Wolf To: qemu-block@nongnu.org Subject: [PATCH v2 23/31] block/export: Create BlockBackend in blk_exp_add() Date: Thu, 24 Sep 2020 17:27:09 +0200 Message-Id: <20200924152717.287415-24-kwolf@redhat.com> In-Reply-To: <20200924152717.287415-1-kwolf@redhat.com> References: <20200924152717.287415-1-kwolf@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=kwolf@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=216.205.24.124; envelope-from=kwolf@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/09/22 23:02:20 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -32 X-Spam_score: -3.3 X-Spam_bar: --- X-Spam_report: (-3.3 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1.199, 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_H5=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: kwolf@redhat.com, qemu-devel@nongnu.org, stefanha@redhat.com, mreitz@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Every export type will need a BlockBackend, so creating it centrally in blk_exp_add() instead of the .create driver callback avoids duplication. Signed-off-by: Kevin Wolf Reviewed-by: Max Reitz --- include/block/nbd.h | 4 ++-- block/export/export.c | 49 +++++++++++++++++++++++++++++++++++++++---- blockdev-nbd.c | 33 ++++------------------------- nbd/server.c | 38 +++++++++++---------------------- 4 files changed, 63 insertions(+), 61 deletions(-) diff --git a/include/block/nbd.h b/include/block/nbd.h index a4dc1f9e54..5270b7eadd 100644 --- a/include/block/nbd.h +++ b/include/block/nbd.h @@ -332,10 +332,10 @@ typedef struct NBDClient NBDClient; int nbd_export_create(BlockExport *exp, BlockExportOptions *exp_args, Error **errp); -int nbd_export_new(BlockExport *blk_exp, BlockDriverState *bs, +int nbd_export_new(BlockExport *blk_exp, const char *name, const char *desc, const char *bitmap, bool readonly, bool shared, - bool writethrough, Error **errp); + Error **errp); void nbd_export_set_on_eject_blk(BlockExport *exp, BlockBackend *blk); AioContext *nbd_export_aio_context(NBDExport *exp); diff --git a/block/export/export.c b/block/export/export.c index ad374a6649..8702c233f3 100644 --- a/block/export/export.c +++ b/block/export/export.c @@ -58,7 +58,10 @@ static const BlockExportDriver *blk_exp_find_driver(BlockExportType type) BlockExport *blk_exp_add(BlockExportOptions *export, Error **errp) { const BlockExportDriver *drv; - BlockExport *exp; + BlockExport *exp = NULL; + BlockDriverState *bs; + BlockBackend *blk; + AioContext *ctx; int ret; if (!id_wellformed(export->id)) { @@ -76,6 +79,33 @@ BlockExport *blk_exp_add(BlockExportOptions *export, Error **errp) return NULL; } + bs = bdrv_lookup_bs(NULL, export->node_name, errp); + if (!bs) { + return NULL; + } + + ctx = bdrv_get_aio_context(bs); + aio_context_acquire(ctx); + + /* + * Block exports are used for non-shared storage migration. Make sure + * that BDRV_O_INACTIVE is cleared and the image is ready for write + * access since the export could be available before migration handover. + * ctx was acquired in the caller. + */ + bdrv_invalidate_cache(bs, NULL); + + blk = blk_new(ctx, BLK_PERM_CONSISTENT_READ, BLK_PERM_ALL); + ret = blk_insert_bs(blk, bs, errp); + if (ret < 0) { + goto fail; + } + + if (!export->has_writethrough) { + export->writethrough = false; + } + blk_set_enable_write_cache(blk, !export->writethrough); + assert(drv->instance_size >= sizeof(BlockExport)); exp = g_malloc0(drv->instance_size); *exp = (BlockExport) { @@ -83,19 +113,30 @@ BlockExport *blk_exp_add(BlockExportOptions *export, Error **errp) .refcount = 1, .user_owned = true, .id = g_strdup(export->id), + .ctx = ctx, + .blk = blk, }; ret = drv->create(exp, export, errp); if (ret < 0) { - g_free(exp->id); - g_free(exp); - return NULL; + goto fail; } assert(exp->blk != NULL); QLIST_INSERT_HEAD(&block_exports, exp, next); + + aio_context_release(ctx); return exp; + +fail: + blk_unref(blk); + aio_context_release(ctx); + if (exp) { + g_free(exp->id); + g_free(exp); + } + return NULL; } /* Callers must hold exp->ctx lock */ diff --git a/blockdev-nbd.c b/blockdev-nbd.c index 4a9a1be571..cdbbcdb958 100644 --- a/blockdev-nbd.c +++ b/blockdev-nbd.c @@ -177,9 +177,6 @@ int nbd_export_create(BlockExport *exp, BlockExportOptions *exp_args, Error **errp) { BlockExportOptionsNbd *arg = &exp_args->u.nbd; - BlockDriverState *bs = NULL; - AioContext *aio_context; - int ret; assert(exp_args->type == BLOCK_EXPORT_TYPE_NBD); @@ -207,38 +204,16 @@ int nbd_export_create(BlockExport *exp, BlockExportOptions *exp_args, return -EEXIST; } - bs = bdrv_lookup_bs(NULL, exp_args->node_name, errp); - if (!bs) { - return -ENOENT; - } - - aio_context = bdrv_get_aio_context(bs); - aio_context_acquire(aio_context); - if (!arg->has_writable) { arg->writable = false; } - if (bdrv_is_read_only(bs) && arg->writable) { - ret = -EINVAL; + if (blk_is_read_only(exp->blk) && arg->writable) { error_setg(errp, "Cannot export read-only node as writable"); - goto out; - } - - if (!exp_args->has_writethrough) { - exp_args->writethrough = false; - } - - ret = nbd_export_new(exp, bs, arg->name, arg->description, arg->bitmap, - !arg->writable, !arg->writable, - exp_args->writethrough, errp); - if (ret < 0) { - goto out; + return -EINVAL; } - ret = 0; - out: - aio_context_release(aio_context); - return ret; + return nbd_export_new(exp, arg->name, arg->description, arg->bitmap, + !arg->writable, !arg->writable, errp); } void qmp_nbd_server_add(NbdServerAddOptions *arg, Error **errp) diff --git a/nbd/server.c b/nbd/server.c index f9af45c480..6c8532de23 100644 --- a/nbd/server.c +++ b/nbd/server.c @@ -1507,56 +1507,42 @@ void nbd_export_set_on_eject_blk(BlockExport *exp, BlockBackend *blk) blk_add_remove_bs_notifier(blk, &nbd_exp->eject_notifier); } -int nbd_export_new(BlockExport *blk_exp, BlockDriverState *bs, +int nbd_export_new(BlockExport *blk_exp, const char *name, const char *desc, const char *bitmap, bool readonly, bool shared, - bool writethrough, Error **errp) + Error **errp) { NBDExport *exp = container_of(blk_exp, NBDExport, common); - AioContext *ctx; - BlockBackend *blk; + BlockBackend *blk = blk_exp->blk; int64_t size; - uint64_t perm; + uint64_t perm, shared_perm; int ret; - size = bdrv_getlength(bs); + size = blk_getlength(blk); if (size < 0) { error_setg_errno(errp, -size, "Failed to determine the NBD export's length"); return size; } - ctx = bdrv_get_aio_context(bs); - blk_exp->ctx = ctx; - - /* - * NBD exports are used for non-shared storage migration. Make sure - * that BDRV_O_INACTIVE is cleared and the image is ready for write - * access since the export could be available before migration handover. - * ctx was acquired in the caller. - */ assert(name && strlen(name) <= NBD_MAX_STRING_SIZE); - bdrv_invalidate_cache(bs, NULL); - /* Don't allow resize while the NBD server is running, otherwise we don't * care what happens with the node. */ - perm = BLK_PERM_CONSISTENT_READ; + blk_get_perm(blk, &perm, &shared_perm); + if (!readonly) { perm |= BLK_PERM_WRITE; } - blk = blk_new(ctx, perm, - BLK_PERM_CONSISTENT_READ | BLK_PERM_WRITE_UNCHANGED | - BLK_PERM_WRITE | BLK_PERM_GRAPH_MOD); - ret = blk_insert_bs(blk, bs, errp); + + ret = blk_set_perm(blk, perm, shared_perm & ~BLK_PERM_RESIZE, errp); if (ret < 0) { - goto fail; + return ret; } - blk_set_enable_write_cache(blk, !writethrough); + blk_set_allow_aio_context_change(blk, true); QTAILQ_INIT(&exp->clients); - exp->common.blk = blk; exp->name = g_strdup(name); assert(!desc || strlen(desc) <= NBD_MAX_STRING_SIZE); exp->description = g_strdup(desc); @@ -1574,6 +1560,7 @@ int nbd_export_new(BlockExport *blk_exp, BlockDriverState *bs, exp->size = QEMU_ALIGN_DOWN(size, BDRV_SECTOR_SIZE); if (bitmap) { + BlockDriverState *bs = blk_bs(blk); BdrvDirtyBitmap *bm = NULL; while (bs) { @@ -1620,7 +1607,6 @@ int nbd_export_new(BlockExport *blk_exp, BlockDriverState *bs, return 0; fail: - blk_unref(blk); g_free(exp->name); g_free(exp->description); return ret; From patchwork Thu Sep 24 15:27:10 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kevin Wolf X-Patchwork-Id: 272826 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 E68EAC4363D for ; 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Thu, 24 Sep 2020 11:28:18 -0400 X-MC-Unique: B5J4MHlJPCSwGFVhPeq3Og-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id CEBFB8B1271; Thu, 24 Sep 2020 15:28:11 +0000 (UTC) Received: from linux.fritz.box.com (ovpn-114-72.ams2.redhat.com [10.36.114.72]) by smtp.corp.redhat.com (Postfix) with ESMTP id 8E24460C04; Thu, 24 Sep 2020 15:28:10 +0000 (UTC) From: Kevin Wolf To: qemu-block@nongnu.org Subject: [PATCH v2 24/31] block/export: Add query-block-exports Date: Thu, 24 Sep 2020 17:27:10 +0200 Message-Id: <20200924152717.287415-25-kwolf@redhat.com> In-Reply-To: <20200924152717.287415-1-kwolf@redhat.com> References: <20200924152717.287415-1-kwolf@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=kwolf@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=63.128.21.124; envelope-from=kwolf@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/09/24 01:10:00 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -32 X-Spam_score: -3.3 X-Spam_bar: --- X-Spam_report: (-3.3 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1.199, 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_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable 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: kwolf@redhat.com, qemu-devel@nongnu.org, stefanha@redhat.com, mreitz@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" This adds a simple QMP command to query the list of block exports. Signed-off-by: Kevin Wolf Reviewed-by: Max Reitz --- qapi/block-export.json | 32 ++++++++++++++++++++++++++++++++ block/export/export.c | 23 +++++++++++++++++++++++ 2 files changed, 55 insertions(+) diff --git a/qapi/block-export.json b/qapi/block-export.json index 3551c2e748..28d4766215 100644 --- a/qapi/block-export.json +++ b/qapi/block-export.json @@ -245,3 +245,35 @@ ## { 'event': 'BLOCK_EXPORT_DELETED', 'data': { 'id': 'str' } } + +## +# @BlockExportInfo: +# +# Information about a single block export. +# +# @id: The unique identifier for the block export +# +# @type: The block export type +# +# @node-name: The node name of the block node that is exported +# +# @shutting-down: True if the export is shutting down (e.g. after a +# block-export-del command, but before the shutdown has +# completed) +# +# Since: 5.2 +## +{ 'struct': 'BlockExportInfo', + 'data': { 'id': 'str', + 'type': 'BlockExportType', + 'node-name': 'str', + 'shutting-down': 'bool' } } + +## +# @query-block-exports: +# +# Returns: A list of BlockExportInfo describing all block exports +# +# Since: 5.2 +## +{ 'command': 'query-block-exports', 'returns': ['BlockExportInfo'] } diff --git a/block/export/export.c b/block/export/export.c index 8702c233f3..657bb58b51 100644 --- a/block/export/export.c +++ b/block/export/export.c @@ -286,3 +286,26 @@ void qmp_block_export_del(const char *id, blk_exp_request_shutdown(exp); } + +BlockExportInfoList *qmp_query_block_exports(Error **errp) +{ + BlockExportInfoList *head = NULL, **p_next = &head; + BlockExport *exp; + + QLIST_FOREACH(exp, &block_exports, next) { + BlockExportInfoList *entry = g_new0(BlockExportInfoList, 1); + BlockExportInfo *info = g_new(BlockExportInfo, 1); + *info = (BlockExportInfo) { + .id = g_strdup(exp->id), + .type = exp->drv->type, + .node_name = g_strdup(bdrv_get_node_name(blk_bs(exp->blk))), + .shutting_down = !exp->user_owned, + }; + + entry->value = info; + *p_next = entry; + p_next = &entry->next; + } + + return head; +} From patchwork Thu Sep 24 15:27:11 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kevin Wolf X-Patchwork-Id: 272821 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 9A2B6C4363D for ; 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Thu, 24 Sep 2020 11:28:25 -0400 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:59548) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1kLTAP-0005aY-68 for qemu-devel@nongnu.org; Thu, 24 Sep 2020 11:28:21 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1600961296; 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=a1TZ9dN2myeC8AcQFU8fybkeRvbP+s/Dsf6tiiuRN8E=; b=bdjZIgVAbYpXA7JS8AA/kWEhbkOGbtHwRbxnhGCumDjCgRJtKHYRJRA8ZRyDHjlSrlyrTb cNSekw0NLtSp0vrywNqIsKvk0MWW/5JtQRAYpJWAv2mXh9G1wevO5yc505I6rWHgmL22QP T+gQnenkSU7MXmCQPQ4EneMZ9gSG4Fs= 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-407-jsBLOx0bPqer4uUzISSNFg-1; Thu, 24 Sep 2020 11:28:14 -0400 X-MC-Unique: jsBLOx0bPqer4uUzISSNFg-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 620F9188C128; Thu, 24 Sep 2020 15:28:13 +0000 (UTC) Received: from linux.fritz.box.com (ovpn-114-72.ams2.redhat.com [10.36.114.72]) by smtp.corp.redhat.com (Postfix) with ESMTP id 222AC60C04; Thu, 24 Sep 2020 15:28:11 +0000 (UTC) From: Kevin Wolf To: qemu-block@nongnu.org Subject: [PATCH v2 25/31] block/export: Move writable to BlockExportOptions Date: Thu, 24 Sep 2020 17:27:11 +0200 Message-Id: <20200924152717.287415-26-kwolf@redhat.com> In-Reply-To: <20200924152717.287415-1-kwolf@redhat.com> References: <20200924152717.287415-1-kwolf@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=kwolf@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=216.205.24.124; envelope-from=kwolf@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/09/22 23:02:20 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -32 X-Spam_score: -3.3 X-Spam_bar: --- X-Spam_report: (-3.3 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1.199, 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_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable 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: kwolf@redhat.com, qemu-devel@nongnu.org, stefanha@redhat.com, mreitz@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" The 'writable' option is a basic option that will probably be applicable to most if not all export types that we will implement. Move it from NBD to the generic BlockExport layer. Signed-off-by: Kevin Wolf Reviewed-by: Max Reitz --- qapi/block-export.json | 15 ++++++++++----- block/export/export.c | 16 +++++++++++++++- blockdev-nbd.c | 18 +++++------------- nbd/server.c | 5 ----- qemu-nbd.c | 4 ++-- 5 files changed, 32 insertions(+), 26 deletions(-) diff --git a/qapi/block-export.json b/qapi/block-export.json index 28d4766215..ad01e9f8aa 100644 --- a/qapi/block-export.json +++ b/qapi/block-export.json @@ -74,9 +74,6 @@ # @description: Free-form description of the export, up to 4096 bytes. # (Since 5.0) # -# @writable: Whether clients should be able to write to the device via the -# NBD connection (default false). -# # @bitmap: Also export the dirty bitmap reachable from @device, so the # NBD client can use NBD_OPT_SET_META_CONTEXT with # "qemu:dirty-bitmap:NAME" to inspect the bitmap. (since 4.0) @@ -85,7 +82,7 @@ ## { 'struct': 'BlockExportOptionsNbd', 'data': { '*name': 'str', '*description': 'str', - '*writable': 'bool', '*bitmap': 'str' } } + '*bitmap': 'str' } } ## # @NbdServerAddOptions: @@ -94,11 +91,15 @@ # # @device: The device name or node name of the node to be exported # +# @writable: Whether clients should be able to write to the device via the +# NBD connection (default false). +# # Since: 5.0 ## { 'struct': 'NbdServerAddOptions', 'base': 'BlockExportOptionsNbd', - 'data': { 'device': 'str' } } + 'data': { 'device': 'str', + '*writable': 'bool' } } ## # @nbd-server-add: @@ -188,6 +189,9 @@ # # @node-name: The node name of the block node to be exported (since: 5.2) # +# @writable: True if clients should be able to write to the export +# (default false) +# # @writethrough: If true, caches are flushed after every write request to the # export before completion is signalled. (since: 5.2; # default: false) @@ -198,6 +202,7 @@ 'base': { 'type': 'BlockExportType', 'id': 'str', 'node-name': 'str', + '*writable': 'bool', '*writethrough': 'bool' }, 'discriminator': 'type', 'data': { diff --git a/block/export/export.c b/block/export/export.c index 657bb58b51..f2c00d13bf 100644 --- a/block/export/export.c +++ b/block/export/export.c @@ -62,6 +62,7 @@ BlockExport *blk_exp_add(BlockExportOptions *export, Error **errp) BlockDriverState *bs; BlockBackend *blk; AioContext *ctx; + uint64_t perm; int ret; if (!id_wellformed(export->id)) { @@ -84,6 +85,14 @@ BlockExport *blk_exp_add(BlockExportOptions *export, Error **errp) return NULL; } + if (!export->has_writable) { + export->writable = false; + } + if (bdrv_is_read_only(bs) && export->writable) { + error_setg(errp, "Cannot export read-only node as writable"); + return NULL; + } + ctx = bdrv_get_aio_context(bs); aio_context_acquire(ctx); @@ -95,7 +104,12 @@ BlockExport *blk_exp_add(BlockExportOptions *export, Error **errp) */ bdrv_invalidate_cache(bs, NULL); - blk = blk_new(ctx, BLK_PERM_CONSISTENT_READ, BLK_PERM_ALL); + perm = BLK_PERM_CONSISTENT_READ; + if (export->writable) { + perm |= BLK_PERM_WRITE; + } + + blk = blk_new(ctx, perm, BLK_PERM_ALL); ret = blk_insert_bs(blk, bs, errp); if (ret < 0) { goto fail; diff --git a/blockdev-nbd.c b/blockdev-nbd.c index cdbbcdb958..30e165c23f 100644 --- a/blockdev-nbd.c +++ b/blockdev-nbd.c @@ -204,16 +204,8 @@ int nbd_export_create(BlockExport *exp, BlockExportOptions *exp_args, return -EEXIST; } - if (!arg->has_writable) { - arg->writable = false; - } - if (blk_is_read_only(exp->blk) && arg->writable) { - error_setg(errp, "Cannot export read-only node as writable"); - return -EINVAL; - } - return nbd_export_new(exp, arg->name, arg->description, arg->bitmap, - !arg->writable, !arg->writable, errp); + !exp_args->writable, !exp_args->writable, errp); } void qmp_nbd_server_add(NbdServerAddOptions *arg, Error **errp) @@ -241,13 +233,13 @@ void qmp_nbd_server_add(NbdServerAddOptions *arg, Error **errp) .type = BLOCK_EXPORT_TYPE_NBD, .id = g_strdup(arg->name), .node_name = g_strdup(bdrv_get_node_name(bs)), + .has_writable = arg->has_writable, + .writable = arg->writable, .u.nbd = { .has_name = true, .name = g_strdup(arg->name), .has_description = arg->has_description, .description = g_strdup(arg->description), - .has_writable = arg->has_writable, - .writable = arg->writable, .has_bitmap = arg->has_bitmap, .bitmap = g_strdup(arg->bitmap), }, @@ -259,8 +251,8 @@ void qmp_nbd_server_add(NbdServerAddOptions *arg, Error **errp) * block-export-add. */ if (bdrv_is_read_only(bs)) { - export_opts->u.nbd.has_writable = true; - export_opts->u.nbd.writable = false; + export_opts->has_writable = true; + export_opts->writable = false; } export = blk_exp_add(export_opts, errp); diff --git a/nbd/server.c b/nbd/server.c index 6c8532de23..465ec9e762 100644 --- a/nbd/server.c +++ b/nbd/server.c @@ -1530,11 +1530,6 @@ int nbd_export_new(BlockExport *blk_exp, /* Don't allow resize while the NBD server is running, otherwise we don't * care what happens with the node. */ blk_get_perm(blk, &perm, &shared_perm); - - if (!readonly) { - perm |= BLK_PERM_WRITE; - } - ret = blk_set_perm(blk, perm, shared_perm & ~BLK_PERM_RESIZE, errp); if (ret < 0) { return ret; diff --git a/qemu-nbd.c b/qemu-nbd.c index ac82acb4ac..6d7ac7490f 100644 --- a/qemu-nbd.c +++ b/qemu-nbd.c @@ -1068,13 +1068,13 @@ int main(int argc, char **argv) .node_name = g_strdup(bdrv_get_node_name(bs)), .has_writethrough = true, .writethrough = writethrough, + .has_writable = true, + .writable = !readonly, .u.nbd = { .has_name = true, .name = g_strdup(export_name), .has_description = !!export_description, .description = g_strdup(export_description), - .has_writable = true, - .writable = !readonly, .has_bitmap = !!bitmap, .bitmap = g_strdup(bitmap), }, From patchwork Thu Sep 24 15:27:12 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kevin Wolf X-Patchwork-Id: 272820 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 5C438C4363D for ; Thu, 24 Sep 2020 16:23:21 +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 E54A02311B for ; Thu, 24 Sep 2020 16:23:20 +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="h74LQ/fZ" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E54A02311B 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]:46390 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kLU1f-00010j-Qo for qemu-devel@archiver.kernel.org; Thu, 24 Sep 2020 12:23:19 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:49418) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kLTAp-00025D-OJ for qemu-devel@nongnu.org; Thu, 24 Sep 2020 11:28:47 -0400 Received: from us-smtp-delivery-124.mimecast.com ([63.128.21.124]:48458) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1kLTAj-0005cE-CW for qemu-devel@nongnu.org; Thu, 24 Sep 2020 11:28:42 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1600961303; 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=2vtAwkx6Ac6RtCGipau0FOuUrS26ng5ynJS079mcJkU=; b=h74LQ/fZL8u0u+crgaiz3YZojDbgXIXqgNT12LD/UrbGiEg6AiL3Jc04qnWMpR2tu3AVlQ LPtDXtsXkcAxdkn41DLc6fkj0Ngn+d/WwS4za2yfIyf2yFv/1AuniijQOoajUwOJGBN2iE Lk/vqpYvg8MOln3WnUNfz/XAL9xSSjQ= 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-298-0g88eIFoPtW0w24BjIHEbg-1; Thu, 24 Sep 2020 11:28:21 -0400 X-MC-Unique: 0g88eIFoPtW0w24BjIHEbg-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id EC1F681CBE3; Thu, 24 Sep 2020 15:28:14 +0000 (UTC) Received: from linux.fritz.box.com (ovpn-114-72.ams2.redhat.com [10.36.114.72]) by smtp.corp.redhat.com (Postfix) with ESMTP id AA71A60C04; Thu, 24 Sep 2020 15:28:13 +0000 (UTC) From: Kevin Wolf To: qemu-block@nongnu.org Subject: [PATCH v2 26/31] nbd: Merge nbd_export_new() and nbd_export_create() Date: Thu, 24 Sep 2020 17:27:12 +0200 Message-Id: <20200924152717.287415-27-kwolf@redhat.com> In-Reply-To: <20200924152717.287415-1-kwolf@redhat.com> References: <20200924152717.287415-1-kwolf@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=kwolf@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=63.128.21.124; envelope-from=kwolf@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/09/24 01:10:00 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -32 X-Spam_score: -3.3 X-Spam_bar: --- X-Spam_report: (-3.3 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1.199, 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_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable 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: kwolf@redhat.com, qemu-devel@nongnu.org, stefanha@redhat.com, mreitz@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" There is no real reason any more why nbd_export_new() and nbd_export_create() should be separate functions. The latter only performs a few checks before it calls the former. What makes the current state stand out is that it's the only function in BlockExportDriver that is not a static function inside nbd/server.c, but a small wrapper in blockdev-nbd.c that then calls back into nbd/server.c for the real functionality. Move all the checks to nbd/server.c and make the resulting function static to improve readability. Signed-off-by: Kevin Wolf Reviewed-by: Max Reitz --- include/block/nbd.h | 7 +----- blockdev-nbd.c | 40 +++++---------------------------- nbd/server.c | 54 ++++++++++++++++++++++++++++++++------------- 3 files changed, 45 insertions(+), 56 deletions(-) diff --git a/include/block/nbd.h b/include/block/nbd.h index 5270b7eadd..3dd9a04546 100644 --- a/include/block/nbd.h +++ b/include/block/nbd.h @@ -330,12 +330,6 @@ int nbd_errno_to_system_errno(int err); typedef struct NBDExport NBDExport; typedef struct NBDClient NBDClient; -int nbd_export_create(BlockExport *exp, BlockExportOptions *exp_args, - Error **errp); -int nbd_export_new(BlockExport *blk_exp, - const char *name, const char *desc, - const char *bitmap, bool readonly, bool shared, - Error **errp); void nbd_export_set_on_eject_blk(BlockExport *exp, BlockBackend *blk); AioContext *nbd_export_aio_context(NBDExport *exp); @@ -349,6 +343,7 @@ void nbd_client_get(NBDClient *client); void nbd_client_put(NBDClient *client); void nbd_server_is_qemu_nbd(bool value); +bool nbd_server_is_running(void); void nbd_server_start(SocketAddress *addr, const char *tls_creds, const char *tls_authz, uint32_t max_connections, Error **errp); diff --git a/blockdev-nbd.c b/blockdev-nbd.c index 30e165c23f..8174023e5c 100644 --- a/blockdev-nbd.c +++ b/blockdev-nbd.c @@ -37,6 +37,11 @@ void nbd_server_is_qemu_nbd(bool value) is_qemu_nbd = value; } +bool nbd_server_is_running(void) +{ + return nbd_server || is_qemu_nbd; +} + static void nbd_blockdev_client_closed(NBDClient *client, bool ignored) { nbd_client_put(client); @@ -173,41 +178,6 @@ void qmp_nbd_server_start(SocketAddressLegacy *addr, qapi_free_SocketAddress(addr_flat); } -int nbd_export_create(BlockExport *exp, BlockExportOptions *exp_args, - Error **errp) -{ - BlockExportOptionsNbd *arg = &exp_args->u.nbd; - - assert(exp_args->type == BLOCK_EXPORT_TYPE_NBD); - - if (!nbd_server && !is_qemu_nbd) { - error_setg(errp, "NBD server not running"); - return -EINVAL; - } - - if (!arg->has_name) { - arg->name = exp_args->node_name; - } - - if (strlen(arg->name) > NBD_MAX_STRING_SIZE) { - error_setg(errp, "export name '%s' too long", arg->name); - return -EINVAL; - } - - if (arg->description && strlen(arg->description) > NBD_MAX_STRING_SIZE) { - error_setg(errp, "description '%s' too long", arg->description); - return -EINVAL; - } - - if (nbd_export_find(arg->name)) { - error_setg(errp, "NBD server already has export named '%s'", arg->name); - return -EEXIST; - } - - return nbd_export_new(exp, arg->name, arg->description, arg->bitmap, - !exp_args->writable, !exp_args->writable, errp); -} - void qmp_nbd_server_add(NbdServerAddOptions *arg, Error **errp) { BlockExport *export; diff --git a/nbd/server.c b/nbd/server.c index 465ec9e762..f74766add7 100644 --- a/nbd/server.c +++ b/nbd/server.c @@ -1507,17 +1507,44 @@ void nbd_export_set_on_eject_blk(BlockExport *exp, BlockBackend *blk) blk_add_remove_bs_notifier(blk, &nbd_exp->eject_notifier); } -int nbd_export_new(BlockExport *blk_exp, - const char *name, const char *desc, - const char *bitmap, bool readonly, bool shared, - Error **errp) +static int nbd_export_create(BlockExport *blk_exp, BlockExportOptions *exp_args, + Error **errp) { NBDExport *exp = container_of(blk_exp, NBDExport, common); + BlockExportOptionsNbd *arg = &exp_args->u.nbd; BlockBackend *blk = blk_exp->blk; int64_t size; uint64_t perm, shared_perm; + bool readonly = !exp_args->writable; + bool shared = !exp_args->writable; int ret; + assert(exp_args->type == BLOCK_EXPORT_TYPE_NBD); + + if (!nbd_server_is_running()) { + error_setg(errp, "NBD server not running"); + return -EINVAL; + } + + if (!arg->has_name) { + arg->name = exp_args->node_name; + } + + if (strlen(arg->name) > NBD_MAX_STRING_SIZE) { + error_setg(errp, "export name '%s' too long", arg->name); + return -EINVAL; + } + + if (arg->description && strlen(arg->description) > NBD_MAX_STRING_SIZE) { + error_setg(errp, "description '%s' too long", arg->description); + return -EINVAL; + } + + if (nbd_export_find(arg->name)) { + error_setg(errp, "NBD server already has export named '%s'", arg->name); + return -EEXIST; + } + size = blk_getlength(blk); if (size < 0) { error_setg_errno(errp, -size, @@ -1525,8 +1552,6 @@ int nbd_export_new(BlockExport *blk_exp, return size; } - assert(name && strlen(name) <= NBD_MAX_STRING_SIZE); - /* Don't allow resize while the NBD server is running, otherwise we don't * care what happens with the node. */ blk_get_perm(blk, &perm, &shared_perm); @@ -1538,9 +1563,8 @@ int nbd_export_new(BlockExport *blk_exp, blk_set_allow_aio_context_change(blk, true); QTAILQ_INIT(&exp->clients); - exp->name = g_strdup(name); - assert(!desc || strlen(desc) <= NBD_MAX_STRING_SIZE); - exp->description = g_strdup(desc); + exp->name = g_strdup(arg->name); + exp->description = g_strdup(arg->description); exp->nbdflags = (NBD_FLAG_HAS_FLAGS | NBD_FLAG_SEND_FLUSH | NBD_FLAG_SEND_FUA | NBD_FLAG_SEND_CACHE); if (readonly) { @@ -1554,12 +1578,12 @@ int nbd_export_new(BlockExport *blk_exp, } exp->size = QEMU_ALIGN_DOWN(size, BDRV_SECTOR_SIZE); - if (bitmap) { + if (arg->bitmap) { BlockDriverState *bs = blk_bs(blk); BdrvDirtyBitmap *bm = NULL; while (bs) { - bm = bdrv_find_dirty_bitmap(bs, bitmap); + bm = bdrv_find_dirty_bitmap(bs, arg->bitmap); if (bm != NULL) { break; } @@ -1569,7 +1593,7 @@ int nbd_export_new(BlockExport *blk_exp, if (bm == NULL) { ret = -ENOENT; - error_setg(errp, "Bitmap '%s' is not found", bitmap); + error_setg(errp, "Bitmap '%s' is not found", arg->bitmap); goto fail; } @@ -1583,15 +1607,15 @@ int nbd_export_new(BlockExport *blk_exp, ret = -EINVAL; error_setg(errp, "Enabled bitmap '%s' incompatible with readonly export", - bitmap); + arg->bitmap); goto fail; } bdrv_dirty_bitmap_set_busy(bm, true); exp->export_bitmap = bm; - assert(strlen(bitmap) <= BDRV_BITMAP_MAX_NAME_SIZE); + assert(strlen(arg->bitmap) <= BDRV_BITMAP_MAX_NAME_SIZE); exp->export_bitmap_context = g_strdup_printf("qemu:dirty-bitmap:%s", - bitmap); + arg->bitmap); assert(strlen(exp->export_bitmap_context) < NBD_MAX_STRING_SIZE); } From patchwork Thu Sep 24 15:27:13 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kevin Wolf X-Patchwork-Id: 272825 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 78BD7C4363D for ; 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Thu, 24 Sep 2020 11:28:22 -0400 X-MC-Unique: 5VB9lzqkPgCRCMq5GUUHkg-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 7EB72884E49; Thu, 24 Sep 2020 15:28:16 +0000 (UTC) Received: from linux.fritz.box.com (ovpn-114-72.ams2.redhat.com [10.36.114.72]) by smtp.corp.redhat.com (Postfix) with ESMTP id 3F60660C04; Thu, 24 Sep 2020 15:28:15 +0000 (UTC) From: Kevin Wolf To: qemu-block@nongnu.org Subject: [PATCH v2 27/31] nbd: Deprecate nbd-server-add/remove Date: Thu, 24 Sep 2020 17:27:13 +0200 Message-Id: <20200924152717.287415-28-kwolf@redhat.com> In-Reply-To: <20200924152717.287415-1-kwolf@redhat.com> References: <20200924152717.287415-1-kwolf@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=kwolf@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=63.128.21.124; envelope-from=kwolf@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/09/24 01:10:00 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -32 X-Spam_score: -3.3 X-Spam_bar: --- X-Spam_report: (-3.3 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1.199, 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_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable 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: kwolf@redhat.com, qemu-devel@nongnu.org, stefanha@redhat.com, mreitz@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" These QMP commands are replaced by block-export-add/del. Signed-off-by: Kevin Wolf Reviewed-by: Max Reitz --- qapi/block-export.json | 11 +++++++++-- docs/system/deprecated.rst | 6 ++++++ 2 files changed, 15 insertions(+), 2 deletions(-) diff --git a/qapi/block-export.json b/qapi/block-export.json index ad01e9f8aa..2291d6cb0c 100644 --- a/qapi/block-export.json +++ b/qapi/block-export.json @@ -108,13 +108,16 @@ # # The export name will be used as the id for the resulting block export. # +# Features: +# @deprecated: This command is deprecated. Use @block-export-add instead. +# # Returns: error if the server is not running, or export with the same name # already exists. # # Since: 1.3.0 ## { 'command': 'nbd-server-add', - 'data': 'NbdServerAddOptions', 'boxed': true } + 'data': 'NbdServerAddOptions', 'boxed': true, 'features': ['deprecated'] } ## # @BlockExportRemoveMode: @@ -147,6 +150,9 @@ # @mode: Mode of command operation. See @BlockExportRemoveMode description. # Default is 'safe'. # +# Features: +# @deprecated: This command is deprecated. Use @block-export-del instead. +# # Returns: error if # - the server is not running # - export is not found @@ -155,7 +161,8 @@ # Since: 2.12 ## { 'command': 'nbd-server-remove', - 'data': {'name': 'str', '*mode': 'BlockExportRemoveMode'} } + 'data': {'name': 'str', '*mode': 'BlockExportRemoveMode'}, + 'features': ['deprecated'] } ## # @nbd-server-stop: diff --git a/docs/system/deprecated.rst b/docs/system/deprecated.rst index 808c334fe7..71276c08f3 100644 --- a/docs/system/deprecated.rst +++ b/docs/system/deprecated.rst @@ -303,6 +303,12 @@ chardev client socket with ``wait`` option (since 4.0) Character devices creating sockets in client mode should not specify the 'wait' field, which is only applicable to sockets in server mode +``nbd-server-add`` and ``nbd-server-remove`` (since 5.2) +'''''''''''''''''''''''''''''''''''''''''''''''''''''''' + +Use the more generic commands ``block-export-add`` and ``block-export-del`` +instead. + Human Monitor Protocol (HMP) commands ------------------------------------- From patchwork Thu Sep 24 15:27:14 2020 Content-Type: text/plain; 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bh=DLfEDvCKGAOk4K1yIKiqBHQKaDoiLeGqdEbMxMIH9zg=; b=ESeRdSGGBwlSAaKsgapqfFPBIRTicv/+1ZcHWzKFNZV9YjEI5cQUmNiAp5abCRjbZuuK8j U1oQ2qzoqaQjpPBhEo/JWeQ7Uqv/QhIoqGbw5FwzMf0ATb3o9dc6wIHz1EtMQiZD/N8UZQ KtOTL6EHBK4Iyo4tj4N8J7dWd0fNsF4= 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-576-6mzyvUTiNj6mdf4fASUh6Q-1; Thu, 24 Sep 2020 11:28:24 -0400 X-MC-Unique: 6mzyvUTiNj6mdf4fASUh6Q-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 11C4156B38; Thu, 24 Sep 2020 15:28:18 +0000 (UTC) Received: from linux.fritz.box.com (ovpn-114-72.ams2.redhat.com [10.36.114.72]) by smtp.corp.redhat.com (Postfix) with ESMTP id C693960C04; Thu, 24 Sep 2020 15:28:16 +0000 (UTC) From: Kevin Wolf To: qemu-block@nongnu.org Subject: [PATCH v2 28/31] iotests: Factor out qemu_tool_pipe_and_status() Date: Thu, 24 Sep 2020 17:27:14 +0200 Message-Id: <20200924152717.287415-29-kwolf@redhat.com> In-Reply-To: <20200924152717.287415-1-kwolf@redhat.com> References: <20200924152717.287415-1-kwolf@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=kwolf@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=63.128.21.124; envelope-from=kwolf@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/09/24 01:10:00 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -32 X-Spam_score: -3.3 X-Spam_bar: --- X-Spam_report: (-3.3 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1.199, 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_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable 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: kwolf@redhat.com, qemu-devel@nongnu.org, stefanha@redhat.com, mreitz@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" We have three almost identical functions that call an external process and return its output and return code. Refactor them into small wrappers around a common function. Signed-off-by: Kevin Wolf Reviewed-by: Max Reitz --- tests/qemu-iotests/iotests.py | 49 ++++++++++++++++------------------- 1 file changed, 23 insertions(+), 26 deletions(-) diff --git a/tests/qemu-iotests/iotests.py b/tests/qemu-iotests/iotests.py index 91e4a57126..81edf8adbf 100644 --- a/tests/qemu-iotests/iotests.py +++ b/tests/qemu-iotests/iotests.py @@ -90,21 +90,30 @@ luks_default_secret_object = 'secret,id=keysec0,data=' + \ luks_default_key_secret_opt = 'key-secret=keysec0' -def qemu_img_pipe_and_status(*args: str) -> Tuple[str, int]: +def qemu_tool_pipe_and_status(tool: str, args: Sequence[str], + connect_stderr: bool = True) -> Tuple[str, int]: """ - Run qemu-img and return both its output and its exit code + Run a tool and return both its output and its exit code """ - subp = subprocess.Popen(qemu_img_args + list(args), + stderr = subprocess.STDOUT if connect_stderr else None + subp = subprocess.Popen(args, stdout=subprocess.PIPE, - stderr=subprocess.STDOUT, + stderr=stderr, universal_newlines=True) output = subp.communicate()[0] if subp.returncode < 0: - sys.stderr.write('qemu-img received signal %i: %s\n' - % (-subp.returncode, + sys.stderr.write('%s received signal %i: %s\n' + % (tool, -subp.returncode, ' '.join(qemu_img_args + list(args)))) return (output, subp.returncode) +def qemu_img_pipe_and_status(*args: str) -> Tuple[str, int]: + """ + Run qemu-img and return both its output and its exit code + """ + full_args = qemu_img_args + list(args) + return qemu_tool_pipe_and_status('qemu-img', full_args) + def qemu_img(*args: str) -> int: '''Run qemu-img and return the exit code''' return qemu_img_pipe_and_status(*args)[1] @@ -265,19 +274,13 @@ def qemu_nbd(*args): '''Run qemu-nbd in daemon mode and return the parent's exit code''' return subprocess.call(qemu_nbd_args + ['--fork'] + list(args)) -def qemu_nbd_early_pipe(*args): +def qemu_nbd_early_pipe(*args: str) -> Tuple[int, str]: '''Run qemu-nbd in daemon mode and return both the parent's exit code and its output in case of an error''' - subp = subprocess.Popen(qemu_nbd_args + ['--fork'] + list(args), - stdout=subprocess.PIPE, - universal_newlines=True) - output = subp.communicate()[0] - if subp.returncode < 0: - sys.stderr.write('qemu-nbd received signal %i: %s\n' % - (-subp.returncode, - ' '.join(qemu_nbd_args + ['--fork'] + list(args)))) - - return subp.returncode, output if subp.returncode else '' + full_args = qemu_nbd_args + ['--fork'] + list(args) + output, returncode = qemu_tool_pipe_and_status('qemu-nbd', full_args, + connect_stderr=False) + return returncode, output if returncode else '' @contextmanager def qemu_nbd_popen(*args): @@ -1143,20 +1146,14 @@ def verify_working_luks(): if not working: notrun(reason) -def qemu_pipe(*args): +def qemu_pipe(*args: str) -> str: """ Run qemu with an option to print something and exit (e.g. a help option). :return: QEMU's stdout output. """ - args = [qemu_prog] + qemu_opts + list(args) - subp = subprocess.Popen(args, stdout=subprocess.PIPE, - stderr=subprocess.STDOUT, - universal_newlines=True) - output = subp.communicate()[0] - if subp.returncode < 0: - sys.stderr.write('qemu received signal %i: %s\n' % - (-subp.returncode, ' '.join(args))) + full_args = [qemu_prog] + qemu_opts + list(args) + output, _ = qemu_tool_pipe_and_status('qemu', full_args) return output def supported_formats(read_only=False): From patchwork Thu Sep 24 15:27:15 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kevin Wolf X-Patchwork-Id: 272816 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,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 022B3C2D0E2 for ; 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Thu, 24 Sep 2020 11:28:20 -0400 X-MC-Unique: vTW8VS6ZPgaMWmvhpX58Iw-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 9F3CF104FC8A; Thu, 24 Sep 2020 15:28:19 +0000 (UTC) Received: from linux.fritz.box.com (ovpn-114-72.ams2.redhat.com [10.36.114.72]) by smtp.corp.redhat.com (Postfix) with ESMTP id 5940C60C04; Thu, 24 Sep 2020 15:28:18 +0000 (UTC) From: Kevin Wolf To: qemu-block@nongnu.org Subject: [PATCH v2 29/31] iotests: Introduce qemu_nbd_list_log() Date: Thu, 24 Sep 2020 17:27:15 +0200 Message-Id: <20200924152717.287415-30-kwolf@redhat.com> In-Reply-To: <20200924152717.287415-1-kwolf@redhat.com> References: <20200924152717.287415-1-kwolf@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=kwolf@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=216.205.24.124; envelope-from=kwolf@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/09/22 23:02:20 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -32 X-Spam_score: -3.3 X-Spam_bar: --- X-Spam_report: (-3.3 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1.199, 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_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable 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: kwolf@redhat.com, qemu-devel@nongnu.org, stefanha@redhat.com, mreitz@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Add a function to list the NBD exports offered by an NBD server. Signed-off-by: Kevin Wolf Reviewed-by: Max Reitz --- tests/qemu-iotests/iotests.py | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-) diff --git a/tests/qemu-iotests/iotests.py b/tests/qemu-iotests/iotests.py index 81edf8adbf..cb9f90f737 100644 --- a/tests/qemu-iotests/iotests.py +++ b/tests/qemu-iotests/iotests.py @@ -67,7 +67,8 @@ if os.environ.get('QEMU_IO_OPTIONS_NO_FMT'): qemu_io_args_no_fmt += \ os.environ['QEMU_IO_OPTIONS_NO_FMT'].strip().split(' ') -qemu_nbd_args = [os.environ.get('QEMU_NBD_PROG', 'qemu-nbd')] +qemu_nbd_prog = os.environ.get('QEMU_NBD_PROG', 'qemu-nbd') +qemu_nbd_args = [qemu_nbd_prog] if os.environ.get('QEMU_NBD_OPTIONS'): qemu_nbd_args += os.environ['QEMU_NBD_OPTIONS'].strip().split(' ') @@ -282,6 +283,13 @@ def qemu_nbd_early_pipe(*args: str) -> Tuple[int, str]: connect_stderr=False) return returncode, output if returncode else '' +def qemu_nbd_list_log(*args: str) -> str: + '''Run qemu-nbd to list remote exports''' + full_args = [qemu_nbd_prog, '-L'] + list(args) + output, _ = qemu_tool_pipe_and_status('qemu-nbd', full_args) + log(output, filters=[filter_testfiles, filter_nbd_exports]) + return output + @contextmanager def qemu_nbd_popen(*args): '''Context manager running qemu-nbd within the context''' @@ -415,6 +423,9 @@ def filter_qmp_imgfmt(qmsg): return value return filter_qmp(qmsg, _filter) +def filter_nbd_exports(output: str) -> str: + return re.sub(r'((min|opt|max) block): [0-9]+', r'\1: XXX', output) + Msg = TypeVar('Msg', Dict[str, Any], List[Any], str) From patchwork Thu Sep 24 15:27:16 2020 Content-Type: text/plain; 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bh=g6w9rA09as+W32QxuJIiH72sIIX0MnoKDndmS+8uX+s=; b=e0r5YP1eEi9Cjxo6Bxg7zwOc9qeyjhG9r0r9K66Jx8TiiL2iFQVwWN4dd5xf62BqFohNSa 2XhqE1sTm4qb2M2KJmxye2cMLSKBpCRvu9i7m/r7EMLPZtXD5R0236ZmtgTWSXEjsc+Xec qmk2dMx99PQiGZH0Jln8bvSeqmVdzkE= 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-572-9bEcIVpOMQSdXMXVCMEMzA-1; Thu, 24 Sep 2020 11:28:22 -0400 X-MC-Unique: 9bEcIVpOMQSdXMXVCMEMzA-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 3B097104FCA0; Thu, 24 Sep 2020 15:28:21 +0000 (UTC) Received: from linux.fritz.box.com (ovpn-114-72.ams2.redhat.com [10.36.114.72]) by smtp.corp.redhat.com (Postfix) with ESMTP id E960460C04; Thu, 24 Sep 2020 15:28:19 +0000 (UTC) From: Kevin Wolf To: qemu-block@nongnu.org Subject: [PATCH v2 30/31] iotests: Allow supported and unsupported formats at the same time Date: Thu, 24 Sep 2020 17:27:16 +0200 Message-Id: <20200924152717.287415-31-kwolf@redhat.com> In-Reply-To: <20200924152717.287415-1-kwolf@redhat.com> References: <20200924152717.287415-1-kwolf@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=kwolf@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=63.128.21.124; envelope-from=kwolf@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/09/24 01:10:00 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -32 X-Spam_score: -3.3 X-Spam_bar: --- X-Spam_report: (-3.3 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1.199, 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_H5=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: kwolf@redhat.com, qemu-devel@nongnu.org, stefanha@redhat.com, mreitz@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" This is useful for specifying 'generic' as supported (which includes only writable image formats), but still excluding some incompatible writable formats. It also removes more lines than it adds. Signed-off-by: Kevin Wolf Reviewed-by: Max Reitz --- tests/qemu-iotests/iotests.py | 6 +----- 1 file changed, 1 insertion(+), 5 deletions(-) diff --git a/tests/qemu-iotests/iotests.py b/tests/qemu-iotests/iotests.py index cb9f90f737..9c33689cba 100644 --- a/tests/qemu-iotests/iotests.py +++ b/tests/qemu-iotests/iotests.py @@ -1064,16 +1064,12 @@ def case_notrun(reason): def _verify_image_format(supported_fmts: Sequence[str] = (), unsupported_fmts: Sequence[str] = ()) -> None: - assert not (supported_fmts and unsupported_fmts) - if 'generic' in supported_fmts and \ os.environ.get('IMGFMT_GENERIC', 'true') == 'true': # similar to # _supported_fmt generic # for bash tests - if imgfmt == 'luks': - verify_working_luks() - return + supported_fmts = () not_sup = supported_fmts and (imgfmt not in supported_fmts) if not_sup or (imgfmt in unsupported_fmts): From patchwork Thu Sep 24 15:27:17 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kevin Wolf X-Patchwork-Id: 272817 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,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 1EF30C2D0E2 for ; 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Thu, 24 Sep 2020 11:28:26 -0400 X-MC-Unique: cBmGQ-dxN2uMI10G-U5R6g-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id D05A2884E5F; Thu, 24 Sep 2020 15:28:22 +0000 (UTC) Received: from linux.fritz.box.com (ovpn-114-72.ams2.redhat.com [10.36.114.72]) by smtp.corp.redhat.com (Postfix) with ESMTP id 84AA760C04; Thu, 24 Sep 2020 15:28:21 +0000 (UTC) From: Kevin Wolf To: qemu-block@nongnu.org Subject: [PATCH v2 31/31] iotests: Test block-export-* QMP interface Date: Thu, 24 Sep 2020 17:27:17 +0200 Message-Id: <20200924152717.287415-32-kwolf@redhat.com> In-Reply-To: <20200924152717.287415-1-kwolf@redhat.com> References: <20200924152717.287415-1-kwolf@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=kwolf@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=216.205.24.124; envelope-from=kwolf@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/09/22 23:02:20 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -32 X-Spam_score: -3.3 X-Spam_bar: --- X-Spam_report: (-3.3 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1.199, 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_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable 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: kwolf@redhat.com, qemu-devel@nongnu.org, stefanha@redhat.com, mreitz@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Signed-off-by: Kevin Wolf Reviewed-by: Max Reitz --- tests/qemu-iotests/307 | 132 +++++++++++++++++++++++++++++++++++++ tests/qemu-iotests/307.out | 124 ++++++++++++++++++++++++++++++++++ tests/qemu-iotests/group | 1 + 3 files changed, 257 insertions(+) create mode 100755 tests/qemu-iotests/307 create mode 100644 tests/qemu-iotests/307.out diff --git a/tests/qemu-iotests/307 b/tests/qemu-iotests/307 new file mode 100755 index 0000000000..de7c25fcfc --- /dev/null +++ b/tests/qemu-iotests/307 @@ -0,0 +1,132 @@ +#!/usr/bin/env python3 +# +# Copyright (C) 2020 Red Hat, Inc. +# +# This program is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 2 of the License, or +# (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program. If not, see . +# +# Creator/Owner: Kevin Wolf +# +# Test the block export QAPI interfaces + +import iotests +import os + +# Need a writable image format (but not vpc, which rounds the image size, nor +# luks which requires special command lines) +iotests.script_initialize( + supported_fmts=['generic'], + unsupported_fmts=['luks', 'vpc'], + supported_platforms=['linux'], +) + +with iotests.FilePath('image') as img, \ + iotests.FilePath('socket', base_dir=iotests.sock_dir) as socket, \ + iotests.VM() as vm: + + iotests.qemu_img('create', '-f', iotests.imgfmt, img, '64M') + iotests.qemu_io_log('-f', iotests.imgfmt, '-c', 'write -P 0x11 0 4k', img) + + iotests.log('=== Launch VM ===') + + virtio_scsi_device = iotests.get_virtio_scsi_device() + + vm.add_object('iothread,id=iothread0') + vm.add_blockdev(f'file,filename={img},node-name=file') + vm.add_blockdev(f'{iotests.imgfmt},file=file,node-name=fmt') + vm.add_blockdev('raw,file=file,node-name=ro,read-only=on') + vm.add_device(f'id=scsi0,driver={virtio_scsi_device},iothread=iothread0') + vm.launch() + + vm.qmp_log('nbd-server-start', + addr={'type': 'unix', 'data': {'path': socket}}, + filters=(iotests.filter_qmp_testfiles, )) + vm.qmp_log('query-block-exports') + + iotests.log('\n=== Create a read-only NBD export ===') + + vm.qmp_log('block-export-add', id='export0', type='nbd', node_name='fmt') + vm.qmp_log('query-block-exports') + + iotests.qemu_nbd_list_log('-k', socket) + + iotests.log('\n=== Try a few invalid things ===') + + vm.qmp_log('block-export-add', id='#invalid', type='nbd', node_name='fmt') + vm.qmp_log('block-export-add', id='export0', type='nbd', node_name='fmt') + vm.qmp_log('block-export-add', id='export1', type='nbd', node_name='ro', + writable=True) + vm.qmp_log('block-export-del', id='export1') + vm.qmp_log('query-block-exports') + + iotests.log('\n=== Move export to an iothread ===') + + vm.qmp_log('device_add', id='sda', driver='scsi-hd', drive='fmt') + vm.qmp_log('query-block-exports') + iotests.qemu_nbd_list_log('-k', socket) + + iotests.log('\n=== Add a writable export ===') + + # This fails because share-rw=off + vm.qmp_log('block-export-add', id='export1', type='nbd', node_name='fmt', + name='export1', writable=True, writethrough=True, + description='This is the writable second export') + + vm.qmp_log('device_del', id='sda') + event = vm.event_wait(name="DEVICE_DELETED", + match={'data': {'device': 'sda'}}) + iotests.log(event, filters=[iotests.filter_qmp_event]) + vm.qmp_log('device_add', id='sda', driver='scsi-hd', drive='fmt', + share_rw=True) + + # Now it should work + vm.qmp_log('block-export-add', id='export1', type='nbd', node_name='fmt', + name='export1', writable=True, writethrough=True, + description='This is the writable second export') + + vm.qmp_log('query-block-exports') + iotests.qemu_nbd_list_log('-k', socket) + + iotests.log('\n=== Connect qemu-io to export1, try removing exports ===') + + nbd_url = f'nbd+unix:///export1?socket={socket}' + qemu_io = iotests.QemuIoInteractive('-f', 'raw', nbd_url) + + iotests.log(qemu_io.cmd('read -P 0x11 0 4k'), + filters=[iotests.filter_qemu_io]) + iotests.log(qemu_io.cmd('write -P 0x22 4k 4k'), + filters=[iotests.filter_qemu_io]) + + vm.qmp_log('block-export-del', id='export1') + vm.qmp_log('block-export-del', id='export0') + iotests.log(vm.get_qmp_events_filtered()) + qemu_io.close() + + vm.qmp_log('query-block-exports') + iotests.qemu_nbd_list_log('-k', socket) + + iotests.log('\n=== Connect qemu-io again, try force removing ===') + + qemu_io = iotests.QemuIoInteractive('-f', 'raw', nbd_url) + vm.qmp_log('block-export-del', id='export1') + vm.qmp_log('block-export-del', id='export1', mode='hard') + + # This should fail now + iotests.log(qemu_io.cmd('read -P 0x11 0 4k')) + qemu_io.close() + + vm.qmp_log('query-block-exports') + iotests.qemu_nbd_list_log('-k', socket) + + iotests.log('\n=== Shut down QEMU ===') + vm.shutdown() diff --git a/tests/qemu-iotests/307.out b/tests/qemu-iotests/307.out new file mode 100644 index 0000000000..daa8ad2da0 --- /dev/null +++ b/tests/qemu-iotests/307.out @@ -0,0 +1,124 @@ +wrote 4096/4096 bytes at offset 0 +4 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) + +=== Launch VM === +{"execute": "nbd-server-start", "arguments": {"addr": {"data": {"path": "SOCK_DIR/PID-socket"}, "type": "unix"}}} +{"return": {}} +{"execute": "query-block-exports", "arguments": {}} +{"return": []} + +=== Create a read-only NBD export === +{"execute": "block-export-add", "arguments": {"id": "export0", "node-name": "fmt", "type": "nbd"}} +{"return": {}} +{"execute": "query-block-exports", "arguments": {}} +{"return": [{"id": "export0", "node-name": "fmt", "shutting-down": false, "type": "nbd"}]} +exports available: 1 + export: 'fmt' + size: 67108864 + flags: 0x58f ( readonly flush fua df multi cache ) + min block: XXX + opt block: XXX + max block: XXX + available meta contexts: 1 + base:allocation + + +=== Try a few invalid things === +{"execute": "block-export-add", "arguments": {"id": "#invalid", "node-name": "fmt", "type": "nbd"}} +{"error": {"class": "GenericError", "desc": "Invalid block export id"}} +{"execute": "block-export-add", "arguments": {"id": "export0", "node-name": "fmt", "type": "nbd"}} +{"error": {"class": "GenericError", "desc": "Block export id 'export0' is already in use"}} +{"execute": "block-export-add", "arguments": {"id": "export1", "node-name": "ro", "type": "nbd", "writable": true}} +{"error": {"class": "GenericError", "desc": "Cannot export read-only node as writable"}} +{"execute": "block-export-del", "arguments": {"id": "export1"}} +{"error": {"class": "GenericError", "desc": "Export 'export1' is not found"}} +{"execute": "query-block-exports", "arguments": {}} +{"return": [{"id": "export0", "node-name": "fmt", "shutting-down": false, "type": "nbd"}]} + +=== Move export to an iothread === +{"execute": "device_add", "arguments": {"drive": "fmt", "driver": "scsi-hd", "id": "sda"}} +{"return": {}} +{"execute": "query-block-exports", "arguments": {}} +{"return": [{"id": "export0", "node-name": "fmt", "shutting-down": false, "type": "nbd"}]} +exports available: 1 + export: 'fmt' + size: 67108864 + flags: 0x58f ( readonly flush fua df multi cache ) + min block: XXX + opt block: XXX + max block: XXX + available meta contexts: 1 + base:allocation + + +=== Add a writable export === +{"execute": "block-export-add", "arguments": {"description": "This is the writable second export", "id": "export1", "name": "export1", "node-name": "fmt", "type": "nbd", "writable": true, "writethrough": true}} +{"error": {"class": "GenericError", "desc": "Conflicts with use by sda as 'root', which does not allow 'write' on fmt"}} +{"execute": "device_del", "arguments": {"id": "sda"}} +{"return": {}} +{"data": {"device": "sda", "path": "/machine/peripheral/sda"}, "event": "DEVICE_DELETED", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}} +{"execute": "device_add", "arguments": {"drive": "fmt", "driver": "scsi-hd", "id": "sda", "share-rw": true}} +{"return": {}} +{"execute": "block-export-add", "arguments": {"description": "This is the writable second export", "id": "export1", "name": "export1", "node-name": "fmt", "type": "nbd", "writable": true, "writethrough": true}} +{"return": {}} +{"execute": "query-block-exports", "arguments": {}} +{"return": [{"id": "export1", "node-name": "fmt", "shutting-down": false, "type": "nbd"}, {"id": "export0", "node-name": "fmt", "shutting-down": false, "type": "nbd"}]} +exports available: 2 + export: 'fmt' + size: 67108864 + flags: 0x58f ( readonly flush fua df multi cache ) + min block: XXX + opt block: XXX + max block: XXX + available meta contexts: 1 + base:allocation + export: 'export1' + description: This is the writable second export + size: 67108864 + flags: 0xced ( flush fua trim zeroes df cache fast-zero ) + min block: XXX + opt block: XXX + max block: XXX + available meta contexts: 1 + base:allocation + + +=== Connect qemu-io to export1, try removing exports === +read 4096/4096 bytes at offset 0 +4 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) + +wrote 4096/4096 bytes at offset 4096 +4 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) + +{"execute": "block-export-del", "arguments": {"id": "export1"}} +{"error": {"class": "GenericError", "desc": "export 'export1' still in use"}} +{"execute": "block-export-del", "arguments": {"id": "export0"}} +{"return": {}} +[{"data": {"id": "export0"}, "event": "BLOCK_EXPORT_DELETED", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}] +{"execute": "query-block-exports", "arguments": {}} +{"return": [{"id": "export1", "node-name": "fmt", "shutting-down": false, "type": "nbd"}]} +exports available: 1 + export: 'export1' + description: This is the writable second export + size: 67108864 + flags: 0xced ( flush fua trim zeroes df cache fast-zero ) + min block: XXX + opt block: XXX + max block: XXX + available meta contexts: 1 + base:allocation + + +=== Connect qemu-io again, try force removing === +{"execute": "block-export-del", "arguments": {"id": "export1"}} +{"error": {"class": "GenericError", "desc": "export 'export1' still in use"}} +{"execute": "block-export-del", "arguments": {"id": "export1", "mode": "hard"}} +{"return": {}} +read failed: Input/output error + +{"execute": "query-block-exports", "arguments": {}} +{"return": []} +exports available: 0 + + +=== Shut down QEMU === diff --git a/tests/qemu-iotests/group b/tests/qemu-iotests/group index ff59cfd2d4..9e4f7c0153 100644 --- a/tests/qemu-iotests/group +++ b/tests/qemu-iotests/group @@ -314,3 +314,4 @@ 303 rw quick 304 rw quick 305 rw quick +307 rw quick export