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[91.219.240.8]) by smtp.gmail.com with ESMTPSA id 6a1803df08f44-6dd181d283bsm191293866d6.101.2025.01.08.08.03.30 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 08 Jan 2025 08:03:31 -0800 (PST) From: Vitaly Kuznetsov To: qemu-devel@nongnu.org, Kevin Wolf , Hanna Reitz , qemu-block@nongnu.org Cc: Eric Blake , Philippe Mathieu-Daude Subject: Re: [PATCH v4 0/2] vpc: Read images exported from Azure correctly In-Reply-To: <20241212134504.1983757-1-vkuznets@redhat.com> References: <20241212134504.1983757-1-vkuznets@redhat.com> Date: Wed, 08 Jan 2025 17:03:28 +0100 Message-ID: <87cygxb8dr.fsf@redhat.com> MIME-Version: 1.0 Content-Type: text/plain Received-SPF: pass client-ip=170.10.129.124; envelope-from=vkuznets@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -24 X-Spam_score: -2.5 X-Spam_bar: -- X-Spam_report: (-2.5 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.432, 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_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=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 Vitaly Kuznetsov writes: > Changes since v3: > - Split the change into two patches [Philippe Mathieu-Daude]. > > It was found that 'qemu-nbd' is not able to work with some disk images > exported from Azure as it uses a currently unknown 'wa\0\0' 'creator app' > signature. QEMU currently supports two methods for determining the image > size: CHS and 'current_size' and the list of known 'creator app's is used > to decide between the two. Invert the logic in QEMU and make 'current_size' > the default as it seems that VPC and old QEMU are the only two legacy apps > where preferring CHS makes sense. > > Vitaly Kuznetsov (2): > vpc: Split off vpc_ignore_current_size() helper > vpc: Read images exported from Azure correctly Ping? -- Vitaly