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a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1773853502; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=S76/cVOCviR6Fdv//9hrer9SRtgDfSZTnaxHVgVfSZg=; b=Gk5msUQMp0V9xgQ3YL1jAm1kaQ1hrMIYFeKZxdbgOdOKp7y4KL3LiMAlqfvO3ij3zfXbuG hoICE+ZrDSc61lghcAHaLwmWHBXgd1woqoYh0jv6RkP8WLiysPE8CMoHfw3ENWuocfYd5D SsCKb90noY8vxTjilIhJa9nmMRoako8= X-MC-Unique: juYxlY98PkCft7OA5NXdLA-1 X-Mimecast-MFC-AGG-ID: juYxlY98PkCft7OA5NXdLA_1773853500 To: devel@lists.libvirt.org Subject: [PATCH 2/7] qemu: capabilities: Introduce QEMU_CAPS_BLOCKDEV_MIRROR_TARGET_IS_ZERO Date: Wed, 18 Mar 2026 18:04:50 +0100 Message-ID: In-Reply-To: References: MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.4 X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: US2ouPu_qXPhe6dbqaSNrMkkWNp-biEpFOR21o8Ne7I_1773853500 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: quoted-printable Message-ID-Hash: SX4QCOINJ3AUFA7LOOY6HVNCRZRAXOZ5 X-Message-ID-Hash: SX4QCOINJ3AUFA7LOOY6HVNCRZRAXOZ5 X-MailFrom: pkrempa@redhat.com X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; loop; banned-address; header-match-devel.lists.libvirt.org-0; emergency; member-moderation; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; digests; suspicious-header X-Mailman-Version: 3.3.10 Precedence: list List-Id: Development discussions about the libvirt library & tools Archived-At: List-Archive: List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: From: Peter Krempa via Devel Reply-To: Peter Krempa X-ZohoMail-DKIM: fail (Header signature does not verify) X-ZM-MESSAGEID: 1773853652875158500 Content-Type: text/plain; charset="utf-8" From: Peter Krempa The 'target-is-zero' option of 'blockdev-mirror' allows telling qemu to skip zeroing the mirror target if the user certifies that it's empty. It was introduced in qemu-10.1. Signed-off-by: Peter Krempa --- src/qemu/qemu_capabilities.c | 4 ++++ src/qemu/qemu_capabilities.h | 3 +++ tests/qemucapabilitiesdata/caps_10.1.0_s390x.xml | 1 + tests/qemucapabilitiesdata/caps_10.1.0_x86_64+inteltdx.xml | 1 + tests/qemucapabilitiesdata/caps_10.1.0_x86_64.xml | 1 + tests/qemucapabilitiesdata/caps_10.2.0_aarch64.xml | 1 + tests/qemucapabilitiesdata/caps_10.2.0_x86_64+mshv.xml | 1 + tests/qemucapabilitiesdata/caps_10.2.0_x86_64.xml | 1 + tests/qemucapabilitiesdata/caps_11.0.0_aarch64.xml | 1 + tests/qemucapabilitiesdata/caps_11.0.0_x86_64.xml | 1 + 10 files changed, 15 insertions(+) diff --git a/src/qemu/qemu_capabilities.c b/src/qemu/qemu_capabilities.c index 65d8aac4fb..2911982678 100644 --- a/src/qemu/qemu_capabilities.c +++ b/src/qemu/qemu_capabilities.c @@ -764,6 +764,9 @@ VIR_ENUM_IMPL(virQEMUCaps, "uefi-vars", /* QEMU_CAPS_DEVICE_UEFI_VARS */ "query-block-flat", /* QEMU_CAPS_QUERY_BLOCK_FLAT */ "amd-iommu.xtsup", /* QEMU_CAPS_AMD_IOMMU_XTSUP */ + + /* 495 */ + "blockdev-mirror.target-is-zero", /* QEMU_CAPS_BLOCKDEV_MIRR= OR_TARGET_IS_ZERO */ ); @@ -1648,6 +1651,7 @@ static struct virQEMUCapsStringFlags virQEMUCapsQMPSc= hemaQueries[] =3D { { "blockdev-add/arg-type/+nbd/tls-hostname", QEMU_CAPS_BLOCKDEV_NBD_TL= S_HOSTNAME }, { "blockdev-add/arg-type/+qcow2/discard-no-unref", QEMU_CAPS_QCOW2_DIS= CARD_NO_UNREF }, { "blockdev-add/arg-type/+virtio-blk-vhost-vdpa/$fdset", QEMU_CAPS_DEV= ICE_VIRTIO_BLK_VHOST_VDPA}, + { "blockdev-mirror/arg-type/target-is-zero", QEMU_CAPS_BLOCKDEV_MIRROR= _TARGET_IS_ZERO }, { "calc-dirty-rate/arg-type/mode", QEMU_CAPS_DIRTYRATE_MODE }, { "chardev-add/arg-type/backend/+socket/data/reconnect-ms", QEMU_CAPS_= CHARDEV_RECONNECT_MILISECONDS }, { "chardev-add/arg-type/backend/+qemu-vdagent", QEMU_CAPS_CHARDEV_QEMU= _VDAGENT }, diff --git a/src/qemu/qemu_capabilities.h b/src/qemu/qemu_capabilities.h index b93d1532ff..c26e06104d 100644 --- a/src/qemu/qemu_capabilities.h +++ b/src/qemu/qemu_capabilities.h @@ -739,6 +739,9 @@ typedef enum { /* virQEMUCapsFlags grouping marker for = syntax-check */ QEMU_CAPS_QUERY_BLOCK_FLAT, /* 'query-block' command supports 'flat' */ QEMU_CAPS_AMD_IOMMU_XTSUP, /* amd-iommu.xtsup */ + /* 495 */ + QEMU_CAPS_BLOCKDEV_MIRROR_TARGET_IS_ZERO, /* 'blockdev-mirror' support= s 'target-is-zero' */ + QEMU_CAPS_LAST /* this must always be the last item */ } virQEMUCapsFlags; diff --git a/tests/qemucapabilitiesdata/caps_10.1.0_s390x.xml b/tests/qemuc= apabilitiesdata/caps_10.1.0_s390x.xml index f33b366db8..584a1b304c 100644 --- a/tests/qemucapabilitiesdata/caps_10.1.0_s390x.xml +++ b/tests/qemucapabilitiesdata/caps_10.1.0_s390x.xml @@ -143,6 +143,7 @@ + 10001000 39100286 v10.1.0 diff --git a/tests/qemucapabilitiesdata/caps_10.1.0_x86_64+inteltdx.xml b/t= ests/qemucapabilitiesdata/caps_10.1.0_x86_64+inteltdx.xml index 05de206987..6dd00c360f 100644 --- a/tests/qemucapabilitiesdata/caps_10.1.0_x86_64+inteltdx.xml +++ b/tests/qemucapabilitiesdata/caps_10.1.0_x86_64+inteltdx.xml @@ -196,6 +196,7 @@ + 10001000 43100286 v10.1.0 diff --git a/tests/qemucapabilitiesdata/caps_10.1.0_x86_64.xml b/tests/qemu= capabilitiesdata/caps_10.1.0_x86_64.xml index 5a2bc0d66f..e7a0818697 100644 --- a/tests/qemucapabilitiesdata/caps_10.1.0_x86_64.xml +++ b/tests/qemucapabilitiesdata/caps_10.1.0_x86_64.xml @@ -218,6 +218,7 @@ + 10001000 43100286 v10.1.0 diff --git a/tests/qemucapabilitiesdata/caps_10.2.0_aarch64.xml b/tests/qem= ucapabilitiesdata/caps_10.2.0_aarch64.xml index ac8f50b984..df3e2a8275 100644 --- a/tests/qemucapabilitiesdata/caps_10.2.0_aarch64.xml +++ b/tests/qemucapabilitiesdata/caps_10.2.0_aarch64.xml @@ -185,6 +185,7 @@ + 10002000 61700287 v10.2.0 diff --git a/tests/qemucapabilitiesdata/caps_10.2.0_x86_64+mshv.xml b/tests= /qemucapabilitiesdata/caps_10.2.0_x86_64+mshv.xml index 05a28f6ddc..54018639ad 100644 --- a/tests/qemucapabilitiesdata/caps_10.2.0_x86_64+mshv.xml +++ b/tests/qemucapabilitiesdata/caps_10.2.0_x86_64+mshv.xml @@ -206,6 +206,7 @@ + 10002000 43100287 v10.2.0 diff --git a/tests/qemucapabilitiesdata/caps_10.2.0_x86_64.xml b/tests/qemu= capabilitiesdata/caps_10.2.0_x86_64.xml index 29ca620345..d5cc279e13 100644 --- a/tests/qemucapabilitiesdata/caps_10.2.0_x86_64.xml +++ b/tests/qemucapabilitiesdata/caps_10.2.0_x86_64.xml @@ -219,6 +219,7 @@ + 10002000 43100287 v10.2.0 diff --git a/tests/qemucapabilitiesdata/caps_11.0.0_aarch64.xml b/tests/qem= ucapabilitiesdata/caps_11.0.0_aarch64.xml index bca13980ce..28cd421f12 100644 --- a/tests/qemucapabilitiesdata/caps_11.0.0_aarch64.xml +++ b/tests/qemucapabilitiesdata/caps_11.0.0_aarch64.xml @@ -187,6 +187,7 @@ + 10002050 61700286 v10.2.0-2062-g084a6c6e73 diff --git a/tests/qemucapabilitiesdata/caps_11.0.0_x86_64.xml b/tests/qemu= capabilitiesdata/caps_11.0.0_x86_64.xml index 2e20a6f3b2..d8c39368d2 100644 --- a/tests/qemucapabilitiesdata/caps_11.0.0_x86_64.xml +++ b/tests/qemucapabilitiesdata/caps_11.0.0_x86_64.xml @@ -221,6 +221,7 @@ + 10002050 43100286 v10.2.0-2062-g084a6c6e73 --=20 2.53.0