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Thu, 9 Jul 2020 10:13:47 +0000 (UTC) Subject: Re: [PATCH v10 02/34] qcow2: Convert qcow2_get_cluster_offset() into qcow2_get_host_offset() To: Alberto Garcia , qemu-devel@nongnu.org References: <33f610f0f842b376e04cec60c855b289c3a14b39.1593791819.git.berto@igalia.com> From: Max Reitz Autocrypt: addr=mreitz@redhat.com; prefer-encrypt=mutual; keydata= mQENBFXOJlcBCADEyyhOTsoa/2ujoTRAJj4MKA21dkxxELVj3cuILpLTmtachWj7QW+TVG8U /PsMCFbpwsQR7oEy8eHHZwuGQsNpEtNC2G/L8Yka0BIBzv7dEgrPzIu+W3anZXQW4702+uES U29G8TP/NGfXRRHGlbBIH9KNUnOSUD2vRtpOLXkWsV5CN6vQFYgQfFvmp5ZpPeUe6xNplu8V mcTw8OSEDW/ZnxJc8TekCKZSpdzYoxfzjm7xGmZqB18VFwgJZlIibt1HE0EB4w5GsD7x5ekh awIe3RwoZgZDLQMdOitJ1tUc8aqaxvgA4tz6J6st8D8pS//m1gAoYJWGwwIVj1DjTYLtABEB AAG0HU1heCBSZWl0eiA8bXJlaXR6QHJlZGhhdC5jb20+iQFTBBMBCAA9AhsDBQkSzAMABQsJ CAcCBhUICQoLAgQWAgMBAh4BAheABQJVzie5FRhoa3A6Ly9rZXlzLmdudXBnLm5ldAAKCRD0 B9sAYdXPQDcIB/9uNkbYEex1rHKz3mr12uxYMwLOOFY9fstP5aoVJQ1nWQVB6m2cfKGdcRe1 2/nFaHSNAzT0NnKz2MjhZVmcrpyd2Gp2QyISCfb1FbT82GMtXFj1wiHmPb3CixYmWGQUUh+I AvUqsevLA+WihgBUyaJq/vuDVM1/K9Un+w+Tz5vpeMidlIsTYhcsMhn0L9wlCjoucljvbDy/ 8C9L2DUdgi3XTa0ORKeflUhdL4gucWoAMrKX2nmPjBMKLgU7WLBc8AtV+84b9OWFML6NEyo4 4cP7cM/07VlJK53pqNg5cHtnWwjHcbpGkQvx6RUx6F1My3y52vM24rNUA3+ligVEgPYBuQEN BFXOJlcBCADAmcVUNTWT6yLWQHvxZ0o47KCP8OcLqD+67T0RCe6d0LP8GsWtrJdeDIQk+T+F xO7DolQPS6iQ6Ak2/lJaPX8L0BkEAiMuLCKFU6Bn3lFOkrQeKp3u05wCSV1iKnhg0UPji9V2 W5eNfy8F4ZQHpeGUGy+liGXlxqkeRVhLyevUqfU0WgNqAJpfhHSGpBgihUupmyUg7lfUPeRM DzAN1pIqoFuxnN+BRHdAecpsLcbR8sQddXmDg9BpSKozO/JyBmaS1RlquI8HERQoe6EynJhd 64aICHDfj61rp+/0jTIcevxIIAzW70IadoS/y3DVIkuhncgDBvGbF3aBtjrJVP+5ABEBAAGJ ASUEGAEIAA8FAlXOJlcCGwwFCRLMAwAACgkQ9AfbAGHVz0CbFwf9F/PXxQR9i4N0iipISYjU sxVdjJOM2TMut+ZZcQ6NSMvhZ0ogQxJ+iEQ5OjnIputKvPVd5U7WRh+4lF1lB/NQGrGZQ1ic alkj6ocscQyFwfib+xIe9w8TG1CVGkII7+TbS5pXHRxZH1niaRpoi/hYtgzkuOPp35jJyqT/ /ELbqQTDAWcqtJhzxKLE/ugcOMK520dJDeb6x2xVES+S5LXby0D4juZlvUj+1fwZu+7Io5+B bkhSVPb/QdOVTpnz7zWNyNw+OONo1aBUKkhq2UIByYXgORPFnbfMY7QWHcjpBVw9MgC4tGeF R4bv+1nAMMxKmb5VvQCExr0eFhJUAHAhVg== Message-ID: <7fd1f2c8-86b3-7547-e7f8-cea985bb80b4@redhat.com> Date: Thu, 9 Jul 2020 12:13:45 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.9.0 MIME-Version: 1.0 In-Reply-To: <33f610f0f842b376e04cec60c855b289c3a14b39.1593791819.git.berto@igalia.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=mreitz@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="NyUkniGvMMBmF2wAXdfg1vI5XFQwBvf8Q" Received-SPF: pass client-ip=205.139.110.120; envelope-from=mreitz@redhat.com; helo=us-smtp-1.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/07/09 01:47:04 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -40 X-Spam_score: -4.1 X-Spam_bar: ---- X-Spam_report: (-4.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1, 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_H2=-1, 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: Kevin Wolf , Derek Su , Vladimir Sementsov-Ogievskiy , qemu-block@nongnu.org Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --NyUkniGvMMBmF2wAXdfg1vI5XFQwBvf8Q Content-Type: multipart/mixed; boundary="AsMCawdaATJ1GcLPaVfl6QE3yDg4cBzMo" --AsMCawdaATJ1GcLPaVfl6QE3yDg4cBzMo Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: quoted-printable On 03.07.20 17:57, Alberto Garcia wrote: > qcow2_get_cluster_offset() takes an (unaligned) guest offset and > returns the (aligned) offset of the corresponding cluster in the qcow2 > image. >=20 > In practice none of the callers need to know where the cluster starts > so this patch makes the function calculate and return the final host > offset directly. The function is also renamed accordingly. >=20 > There is a pre-existing exception with compressed clusters: in this > case the function returns the complete cluster descriptor (containing > the offset and size of the compressed data). This does not change with > this patch but it is now documented. >=20 > Signed-off-by: Alberto Garcia > --- > block/qcow2.h | 4 ++-- > block/qcow2-cluster.c | 41 +++++++++++++++++++++++------------------ > block/qcow2.c | 24 +++++++----------------- > 3 files changed, 32 insertions(+), 37 deletions(-) Reviewed-by: Max Reitz --AsMCawdaATJ1GcLPaVfl6QE3yDg4cBzMo-- --NyUkniGvMMBmF2wAXdfg1vI5XFQwBvf8Q Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAEBCAAdFiEEkb62CjDbPohX0Rgp9AfbAGHVz0AFAl8G7dkACgkQ9AfbAGHV z0CREAgArCv9NFC+8vX0gR6vvCD0HwKodFqLEl+TKkvkYDzFIlgJVZuMc1O5CiYO xl5ibaM2c/D83lrSm0Mq7W70RN9flKx67KsY1sXPT0POrt1T2fvjQ3onwOxfhmFL +Px/SKZiYi7UTiKwwr4EbDzN88p4XOGqouBLLjDckRS4fndR7+2PWOB3toGp1KO7 ZWxL4n8+HtmcJPbze+AhoYEDSBXYz/uJ7lQHhoGx06SqxMigNxs/RKGgIhI9nP/+ GF4wzUGWZ9ydqbHch7sNvN74vGJrCdI2inLZXAJuZdKBxbpamNkByp2PUTsrKKXI IBqHVzVZLXl9/4ayS50A5enaaxQ54A== =//M9 -----END PGP SIGNATURE----- --NyUkniGvMMBmF2wAXdfg1vI5XFQwBvf8Q--