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[95.90.246.5]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-a93c27776cesm373146966b.40.2024.09.29.06.01.34 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 29 Sep 2024 06:01:35 -0700 (PDT) From: Sam Li X-Google-Original-From: Sam Li To: qemu-devel@nongnu.org Cc: Markus Armbruster , stefanha@redhat.com, Kevin Wolf , Eric Blake , dmitry.fomichev@wdc.com, Hanna Reitz , dlemoal@kernel.org, qemu-block@nongnu.org, hare@suse.de, Sam Li Subject: [PATCH v8 1/4] docs/qcow2: add the zoned format feature Date: Sun, 29 Sep 2024 15:01:30 +0200 Message-Id: <20240929130133.535568-2-jia.li@ionos.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240929130133.535568-1-jia.li@ionos.com> References: <20240929130133.535568-1-jia.li@ionos.com> MIME-Version: 1.0 Received-SPF: pass client-ip=2a00:1450:4864:20::62d; envelope-from=faithilikerun@gmail.com; helo=mail-ej1-x62d.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=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: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org From: Sam Li Add the specs for the zoned format feature of the qcow2 driver. The qcow2 file then can emulate real zoned devices, either passed through by virtio-blk device or NVMe ZNS drive to the guest given zoned information. Signed-off-by: Sam Li Reviewed-by: Stefan Hajnoczi --- docs/system/qemu-block-drivers.rst.inc | 42 ++++++++++++++++++++++++++ 1 file changed, 42 insertions(+) diff --git a/docs/system/qemu-block-drivers.rst.inc b/docs/system/qemu-block-drivers.rst.inc index 384e95ba76..5066c943d5 100644 --- a/docs/system/qemu-block-drivers.rst.inc +++ b/docs/system/qemu-block-drivers.rst.inc @@ -172,6 +172,48 @@ This section describes each format and the options that are supported for it. filename`` to check if the NOCOW flag is set or not (Capital 'C' is NOCOW flag). + .. option:: zone.mode + If this is set to ``host-managed``, the image is an emulated zoned + block device. This option is only valid to emulated zoned device files. + + .. option:: zone.size + + The size of a zone in bytes. The device is divided into zones of this + size with the exception of the last zone, which may be smaller. + + .. option:: zone.capacity + + The initial capacity value, in bytes, for all zones. The capacity must + be less than or equal to zone size. If the last zone is smaller, then + its capacity is capped. + + The zone capacity is per zone and may be different between zones in real + devices. QCow2 sets all zones to the same capacity. + + .. option:: zone.conventional_zones + + The number of conventional zones of the zoned device. + + .. option:: zone.max_active_zones + + The limit of the zones with implicit open, explicit open or closed state. + + The max active zones must be less or equal to the number of SWR + (sequential write required) zones of the device. + + .. option:: zone.max_open_zones + + The maximal allowed open zones. The max open zones must not be larger than + the max active zones. + + If the limits of open zones or active zones are equal to the number of + SWR zones, then it is the same as having no limits. + + .. option:: zone.max_append_bytes + + The number of bytes in a zone append request that can be issued to the + device. It must be 512-byte aligned and less than the zone capacity. + .. program:: image-formats .. option:: qed