From patchwork Tue Oct 1 13:20:06 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kevin Wolf X-Patchwork-Id: 279451 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [IPv6:2001:4830:134:3::11]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id AE03B2C010C for ; Tue, 1 Oct 2013 23:21:24 +1000 (EST) Received: from localhost ([::1]:58829 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1VQztC-0004LN-HH for incoming@patchwork.ozlabs.org; Tue, 01 Oct 2013 09:21:22 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:50545) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1VQzsX-0004B7-9F for qemu-devel@nongnu.org; Tue, 01 Oct 2013 09:20:47 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1VQzsO-00082P-Tx for qemu-devel@nongnu.org; Tue, 01 Oct 2013 09:20:41 -0400 Received: from mx1.redhat.com ([209.132.183.28]:55511) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1VQzsO-00082J-CS for qemu-devel@nongnu.org; Tue, 01 Oct 2013 09:20:32 -0400 Received: from int-mx10.intmail.prod.int.phx2.redhat.com (int-mx10.intmail.prod.int.phx2.redhat.com [10.5.11.23]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id r91DKSnj030470 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Tue, 1 Oct 2013 09:20:28 -0400 Received: from dhcp-200-207.str.redhat.com (dhcp-192-197.str.redhat.com [10.33.192.197]) by int-mx10.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id r91DKHuW012664; Tue, 1 Oct 2013 09:20:26 -0400 From: Kevin Wolf To: qemu-devel@nongnu.org Date: Tue, 1 Oct 2013 15:20:06 +0200 Message-Id: <1380633619-12213-5-git-send-email-kwolf@redhat.com> In-Reply-To: <1380633619-12213-1-git-send-email-kwolf@redhat.com> References: <1380633619-12213-1-git-send-email-kwolf@redhat.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.23 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 209.132.183.28 Cc: kwolf@redhat.com, benoit.canet@irqsave.net, armbru@redhat.com, mreitz@redhat.com, stefanha@redhat.com, xiawenc@linux.vnet.ibm.com Subject: [Qemu-devel] [PATCH v2 04/17] blockdev: 'blockdev-add' QMP command X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org For examples see the changes to qmp-commands.hx. Signed-off-by: Kevin Wolf --- blockdev.c | 57 ++++++++++++++ qapi-schema.json | 236 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ qmp-commands.hx | 59 ++++++++++++++ 3 files changed, 352 insertions(+) diff --git a/blockdev.c b/blockdev.c index 29a5b70..3059987 100644 --- a/blockdev.c +++ b/blockdev.c @@ -38,6 +38,8 @@ #include "qemu/option.h" #include "qemu/config-file.h" #include "qapi/qmp/types.h" +#include "qapi-visit.h" +#include "qapi/qmp-output-visitor.h" #include "sysemu/sysemu.h" #include "block/block_int.h" #include "qmp-commands.h" @@ -2066,6 +2068,61 @@ void qmp_block_job_complete(const char *device, Error **errp) block_job_complete(job, errp); } +void qmp_blockdev_add(BlockdevOptions *options, Error **errp) +{ + QmpOutputVisitor *ov = qmp_output_visitor_new(); + QObject *obj; + QDict *qdict; + DriveInfo *dinfo; + Error *local_err = NULL; + + /* Require an ID in the top level */ + if (!options->has_id) { + error_setg(errp, "Block device needs an ID"); + return; + } + + /* TODO Sort it out in raw-posix and drive_init: Reject aio=native with + * cache.direct=false instead of silently switching to aio=threads, except + * if called from drive_init. + * + * For now, simply forbidding the combination for all drivers will do. */ + if (options->has_aio && options->aio == BLOCKDEV_AIO_OPTIONS_NATIVE) { + bool direct = options->cache->has_direct && options->cache->direct; + if (!options->has_cache && !direct) { + error_setg(errp, "aio=native requires cache.direct=true"); + goto fail; + } + } + + visit_type_BlockdevOptions(qmp_output_get_visitor(ov), + &options, NULL, &local_err); + if (error_is_set(&local_err)) { + error_propagate(errp, local_err); + goto fail; + } + + obj = qmp_output_get_qobject(ov); + qdict = qobject_to_qdict(obj); + + qdict_flatten(qdict); + + QemuOpts *opts = qemu_opts_from_qdict(&qemu_drive_opts, qdict, &local_err); + if (error_is_set(&local_err)) { + error_propagate(errp, local_err); + goto fail; + } + + dinfo = blockdev_init(opts, IF_NONE); + if (!dinfo) { + error_setg(errp, "Could not open image"); + goto fail; + } + +fail: + qmp_output_visitor_cleanup(ov); +} + static void do_qmp_query_block_jobs_one(void *opaque, BlockDriverState *bs) { BlockJobInfoList **prev = opaque; diff --git a/qapi-schema.json b/qapi-schema.json index 145eca8..7192119 100644 --- a/qapi-schema.json +++ b/qapi-schema.json @@ -3902,3 +3902,239 @@ ## { 'command': 'query-rx-filter', 'data': { '*name': 'str' }, 'returns': ['RxFilterInfo'] } + + +## +# @BlockdevDiscardOptions +# +# Determines how to handle discard requests. +# +# @ignore: Ignore the request +# @unmap: Forward as an unmap request +# +# Since: 1.7 +## +{ 'enum': 'BlockdevDiscardOptions', + 'data': [ 'ignore', 'unmap' ] } + +## +# @BlockdevAioOptions +# +# Selects the AIO backend to handle I/O requests +# +# @threads: Use qemu's thread pool +# @native: Use native AIO backend (only Linux and Windows) +# +# Since: 1.7 +## +{ 'enum': 'BlockdevAioOptions', + 'data': [ 'threads', 'native' ] } + +## +# @BlockdevCacheOptions +# +# Includes cache-related options for block devices +# +# @writeback: #optional enables writeback mode for any caches (default: true) +# @direct: #optional enables use of O_DIRECT (bypass the host page cache; +# default: false) +# @no-flush: #optional ignore any flush requests for the device (default: +# false) +# +# Since: 1.7 +## +{ 'type': 'BlockdevCacheOptions', + 'data': { '*writeback': 'bool', + '*direct': 'bool', + '*no-flush': 'bool' } } + +## +# @BlockdevOptionsBase +# +# Options that are available for all block devices, independent of the block +# driver. +# +# @driver: block driver name +# @id: #optional id by which the new block device can be referred to. +# This is a required option on the top level of blockdev-add, and +# currently not allowed on any other level. +# @discard: #optional discard-related options (default: ignore) +# @cache: #optional cache-related options +# @aio: #optional AIO backend (default: threads) +# @rerror: #optional how to handle read errors on the device +# (default: report) +# @werror: #optional how to handle write errors on the device +# (default: enospc) +# @read-only: #optional whether the block device should be read-only +# (default: false) +# +# Since: 1.7 +## +{ 'type': 'BlockdevOptionsBase', + 'data': { 'driver': 'str', + '*id': 'str', + '*discard': 'BlockdevDiscardOptions', + '*cache': 'BlockdevCacheOptions', + '*aio': 'BlockdevAioOptions', + '*rerror': 'BlockdevOnError', + '*werror': 'BlockdevOnError', + '*read-only': 'bool' } } + +## +# @BlockdevOptionsFile +# +# Driver specific block device options for the file backend and similar +# protocols. +# +# @filename: path to the image file +# +# Since: 1.7 +## +{ 'type': 'BlockdevOptionsFile', + 'data': { 'filename': 'str' } } + +## +# @BlockdevOptionsVVFAT +# +# Driver specific block device options for the vvfat protocol. +# +# @dir: directory to be exported as FAT image +# @fat-type: #optional FAT type: 12, 16 or 32 +# @floppy: #optional whether to export a floppy image (true) or +# partitioned hard disk (false; default) +# @rw: #optional whether to allow write operations (default: false) +# +# Since: 1.7 +## +{ 'type': 'BlockdevOptionsVVFAT', + 'data': { 'dir': 'str', '*fat-type': 'int', '*floppy': 'bool', + '*rw': 'bool' } } + +## +# @BlockdevOptionsGenericFormat +# +# Driver specific block device options for image format that have no option +# besides their data source. +# +# @file: reference to or definition of the data source block device +# +# Since: 1.7 +## +{ 'type': 'BlockdevOptionsGenericFormat', + 'data': { 'file': 'BlockdevRef' } } + +## +# @BlockdevOptionsGenericCOWFormat +# +# Driver specific block device options for image format that have no option +# besides their data source and an optional backing file. +# +# @backing: #optional reference to or definition of the backing file block +# device (if missing, taken from the image file content). It is +# allowed to pass an empty string here in order to disable the +# default backing file. +# +# Since: 1.7 +## +{ 'type': 'BlockdevOptionsGenericCOWFormat', + 'base': 'BlockdevOptionsGenericFormat', + 'data': { '*backing': 'BlockdevRef' } } + +## +# @BlockdevOptionsQcow2 +# +# Driver specific block device options for qcow2. +# +# @lazy-refcounts: #optional whether to enable the lazy refcounts feature +# (default is taken from the image file) +# +# @pass-discard-request: #optional whether discard requests to the qcow2 device +# should be forwarded to the data source +# +# @pass-discard-snapshot: #optional whether discard requests for the data source +# should be issued when a snapshot operation (e.g. +# deleting a snapshot) frees clusters in the qcow2 file +# +# @pass-discard-other: #optional whether discard requests for the data source +# should be issued on other occasions where a cluster gets +# freed +# +# Since: 1.7 +## +{ 'type': 'BlockdevOptionsQcow2', + 'base': 'BlockdevOptionsGenericCOWFormat', + 'data': { '*lazy-refcounts': 'bool', + '*pass-discard-request': 'bool', + '*pass-discard-snapshot': 'bool', + '*pass-discard-other': 'bool' } } + +## +# @BlockdevOptions +# +# Options for creating a block device. +# +# Since: 1.7 +## +{ 'union': 'BlockdevOptions', + 'base': 'BlockdevOptionsBase', + 'discriminator': 'driver', + 'data': { + 'file': 'BlockdevOptionsFile', + 'http': 'BlockdevOptionsFile', + 'https': 'BlockdevOptionsFile', + 'ftp': 'BlockdevOptionsFile', + 'ftps': 'BlockdevOptionsFile', + 'tftp': 'BlockdevOptionsFile', +# TODO gluster: Wait for structured options +# TODO iscsi: Wait for structured options +# TODO nbd: Should take InetSocketAddress for 'host'? +# TODO rbd: Wait for structured options +# TODO sheepdog: Wait for structured options +# TODO ssh: Should take InetSocketAddress for 'host'? + 'vvfat': 'BlockdevOptionsVVFAT', + +# TODO blkdebug: Wait for structured options +# TODO blkverify: Wait for structured options + + 'bochs': 'BlockdevOptionsGenericFormat', + 'cloop': 'BlockdevOptionsGenericFormat', + 'cow': 'BlockdevOptionsGenericCOWFormat', + 'dmg': 'BlockdevOptionsGenericFormat', + 'parallels': 'BlockdevOptionsGenericFormat', + 'qcow': 'BlockdevOptionsGenericCOWFormat', + 'qcow2': 'BlockdevOptionsQcow2', + 'qed': 'BlockdevOptionsGenericCOWFormat', + 'raw': 'BlockdevOptionsGenericFormat', + 'vdi': 'BlockdevOptionsGenericFormat', + 'vhdx': 'BlockdevOptionsGenericFormat', + 'vmdk': 'BlockdevOptionsGenericCOWFormat', + 'vpc': 'BlockdevOptionsGenericFormat' + } } + +## +# @BlockdevRef +# +# Reference to a block device. +# +# @definition: defines a new block device inline +# @reference: references the ID of an existing block device. An +# empty string means that no block device should be +# referenced. +# +# Since: 1.7 +## +{ 'union': 'BlockdevRef', + 'discriminator': {}, + 'data': { 'definition': 'BlockdevOptions', + 'reference': 'str' } } + +## +# @blockdev-add: +# +# Creates a new block device. +# +# @options: block device options for the new device +# +# Since: 1.7 +## +{ 'command': 'blockdev-add', 'data': { 'options': 'BlockdevOptions' } } diff --git a/qmp-commands.hx b/qmp-commands.hx index b17c46e..449ecea 100644 --- a/qmp-commands.hx +++ b/qmp-commands.hx @@ -3240,3 +3240,62 @@ Example: } EQMP + + { + .name = "blockdev-add", + .args_type = "options:q", + .mhandler.cmd_new = qmp_marshal_input_blockdev_add, + }, + +SQMP +blockdev-add +------------ + +Add a block device. + +Arguments: + +- "options": block driver options + +Example (1): + +-> { "execute": "blockdev-add", + "arguments": { "options" : { "driver": "qcow2", + "file": { "driver": "file", + "filename": "test.qcow2" } } } } +<- { "return": {} } + +Example (2): + +-> { "execute": "blockdev-add", + "arguments": { + "options": { + "driver": "qcow2", + "id": "my_disk", + "discard": "unmap", + "throttling": { + "bps-total": 1234567, + "iops-write": 100 + }, + "cache": { + "direct": true, + "writeback": true + }, + "file": { + "driver": "file", + "filename": "/tmp/test.qcow2" + }, + "backing": { + "driver": "raw", + "file": { + "driver": "file", + "filename": "/dev/fdset/4" + } + } + } + } + } + +<- { "return": {} } + +EQMP