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Fri, 6 Jan 2023 08:33:22 +0000 (GMT) Received: from eusmgms1.samsung.com (unknown [182.198.249.179]) by eusmtrp1.samsung.com (KnoxPortal) with ESMTP id 20230106083322eusmtrp14b2b106c1afd8945ed5347acbbf4cd5e~3qy5bgmoU2166121661eusmtrp1k; Fri, 6 Jan 2023 08:33:22 +0000 (GMT) X-AuditID: cbfec7f5-25bff7000000ab6c-49-63b7dcd2ee91 Received: from eusmtip2.samsung.com ( [203.254.199.222]) by eusmgms1.samsung.com (EUCPMTA) with SMTP id 0A.C6.23420.2DCD7B36; Fri, 6 Jan 2023 08:33:22 +0000 (GMT) Received: from localhost (unknown [106.210.248.66]) by eusmtip2.samsung.com (KnoxPortal) with ESMTPA id 20230106083321eusmtip292f5234c8251a10cc76fbb993a2024c1~3qy5MIvO82941329413eusmtip2E; Fri, 6 Jan 2023 08:33:21 +0000 (GMT) From: Pankaj Raghav To: axboe@kernel.dk Cc: kernel@pankajraghav.com, linux-kernel@vger.kernel.org, hare@suse.de, bvanassche@acm.org, snitzer@kernel.org, dm-devel@redhat.com, damien.lemoal@opensource.wdc.com, linux-nvme@lists.infradead.org, hch@lst.de, linux-block@vger.kernel.org, gost.dev@samsung.com, Luis Chamberlain , Johannes Thumshirn , Pankaj Raghav Subject: [PATCH 5/7] dm-zoned: ensure only power of 2 zone sizes are allowed Date: Fri, 6 Jan 2023 09:33:15 +0100 Message-Id: <20230106083317.93938-6-p.raghav@samsung.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230106083317.93938-1-p.raghav@samsung.com> MIME-Version: 1.0 X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFrrKKsWRmVeSWpSXmKPExsWy7djP87qX7mxPNjj1U9Zi9d1+NotpH34y W/w+e57ZYu+72awWNw/sZLLYs2gSk8XK1UeZLP523WOyOPPyM4vF3lvaFpd3zWGzmL/sKbvF jQlPGS0+L21htzhxS9qB3+PyFW+Py2dLPTat6mTz2Lyk3mP3zQY2j52t91k9zq509Hi/7yqb R9+WVYwem09Xe3zeJOfRfqCbKYAnissmJTUnsyy1SN8ugSvjQutMloL9vBXrby5namCcyt3F yMkhIWAicWzBSZYuRi4OIYEVjBKLTq5lgnC+MEqsP3oWKvOZUeLA1O3MMC0diw5AJZYzShw7 28kM4bxglDj5/T5jFyMHB5uAlkRjJztIg4iAsMT+jlawBmaBHmaJ3Xc+M4EkhAV8JLp/bWQE sVkEVCXm3LzPAmLzClhK3L2+BmqbvMTMS9/BBnEKWEk8n76GCaJGUOLkzCdg9cxANc1bZ4Md ISEwm1PiwJrT7BDNLhJtU9sZIWxhiVfHt0DFZSROT+5hgbCrJZ7e+A3V3MIo0b9zPRvIBxIC 1hJ9Z3JATGYBTYn1u/Qhyh0l1ixexQJRwSdx460gxAl8EpO2TWeGCPNKdLQJQVQrSez8+QRq qYTE5aY5UEs9JP53LWGawKg4C8kzs5A8Mwth7wJG5lWM4qmlxbnpqcXGeanlesWJucWleel6 yfm5mxiBKe/0v+NfdzCuePVR7xAjEwfjIUYJDmYlEd6y/m3JQrwpiZVVqUX58UWlOanFhxil OViUxHlnbJ2fLCSQnliSmp2aWpBaBJNl4uCUamDS6Smd2XLy7OXvL+bWmtp7z1Pc0L4pauuH P1cnRE5vPH9qQvCDQ7FXMwy0dk+e9sfsCpvp0vpNe9rqlA9GC7D7tVuV7fTbefCRTvyLtwxL p9j9NinRWxX0OOZOn8+a6KB+DeZfRw+tX3CyXf/Rsj2fJz/dOiMk7Ef9VON7z0I3cK790fU9 nDWVs8khzVbr5dXlrj+marLcnH9vD699j4pbS1lU952is2d97DbXzLQvPFTnOddZ6WPBUdtX 9Q+3x6r8U9oRF8xSl3ZP2kXr6GHTlOaKCfXJT8JYTGT80ny/5W9Z+PiAUPELrozPxyvySi/3 NCxyvHX1Sc3d1/UzZbZcfrzy5bPzDGvyfmX+2MTyW4mlOCPRUIu5qDgRAG4MpdjoAwAA X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFjrCIsWRmVeSWpSXmKPExsVy+t/xe7qX7mxPNmg9xmKx+m4/m8W0Dz+Z LX6fPc9ssffdbFaLmwd2MlnsWTSJyWLl6qNMFn+77jFZnHn5mcVi7y1ti8u75rBZzF/2lN3i xoSnjBafl7awW5y4Je3A73H5irfH5bOlHptWdbJ5bF5S77H7ZgObx87W+6weZ1c6erzfd5XN o2/LKkaPzaerPT5vkvNoP9DNFMATpWdTlF9akqqQkV9cYqsUbWhhpGdoaaFnZGKpZ2hsHmtl ZKqkb2eTkpqTWZZapG+XoJdxoXUmS8F+3or1N5czNTBO5e5i5OSQEDCR6Fh0gKWLkYtDSGAp o0T3rzvMEAkJidsLmxghbGGJP9e62CCKnjFKvN79GyjBwcEmoCXR2MkOUiMCVLO/oxVsELPA HGaJk5tngg0SFvABGroRbBCLgKrEnJv3WUBsXgFLibvX10Atk5eYeek72CBOASuJ59PXMIHY QkA1HR972SDqBSVOznwC1ssMVN+8dTbzBEaBWUhSs5CkFjAyrWIUSS0tzk3PLTbUK07MLS7N S9dLzs/dxAiMzm3Hfm7ewTjv1Ue9Q4xMHIyHGCU4mJVEeMv6tyUL8aYkVlalFuXHF5XmpBYf YjQFunsis5Rocj4wPeSVxBuaGZgamphZGphamhkrifN6FnQkCgmkJ5akZqemFqQWwfQxcXBK NTB1mdzP3lr/US1n1otJEhdWGUZsWTqFyz/m0BmZjxMenuqex//nC1tAN1PP9Xr2dVWXbz7S VZzopTgtz/1qxfTl6dOeadce77H4JDY78roph1LTG4GMGVb3jJTeMwmGrH99t/70/MUW95xs 0i6aMqrE8245FJiT0rPER3dn7T/33UteHbp24FeGQMj/V59UwljNEjZ0quzPuDy3+or6jkf7 fBfHunfdNN9SceIP76Nd9788i81Xq1hs4G4437Rix/rHVypKmRkSLrJc90qPv7ja69XLrDxx yUlX7tu2G0Vb3TOpj+qpmrUjXDYmRerm+ozQs7dPfeVeWKuYOev3Nq/paV6PO/7UN5aUuB49 Ny9DiaU4I9FQi7moOBEAFX/yu1cDAAA= X-CMS-MailID: 20230106083322eucas1p2414f1f7f121fbbd7a0e5e1b1b622f5c0 X-Msg-Generator: CA X-RootMTR: 20230106083322eucas1p2414f1f7f121fbbd7a0e5e1b1b622f5c0 X-EPHeader: CA CMS-TYPE: 201P X-CMS-RootMailID: 20230106083322eucas1p2414f1f7f121fbbd7a0e5e1b1b622f5c0 References: <20230106083317.93938-1-p.raghav@samsung.com> Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org From: Luis Chamberlain dm-zoned relies on the assumption that the zone size is a power-of-2(po2) and the zone capacity is same as the zone size. Ensure only po2 devices can be used as dm-zoned target until a native support for zoned devices with non-po2 zone size is added. Reviewed-by: Hannes Reinecke Reviewed-by: Damien Le Moal Reviewed-by: Bart Van Assche Reviewed-by: Mike Snitzer Reviewed-by: Johannes Thumshirn Signed-off-by: Luis Chamberlain Signed-off-by: Pankaj Raghav --- drivers/md/dm-zoned-target.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/md/dm-zoned-target.c b/drivers/md/dm-zoned-target.c index 95b132b52f33..9325bf5dee81 100644 --- a/drivers/md/dm-zoned-target.c +++ b/drivers/md/dm-zoned-target.c @@ -792,6 +792,10 @@ static int dmz_fixup_devices(struct dm_target *ti) return -EINVAL; } zone_nr_sectors = bdev_zone_sectors(bdev); + if (!is_power_of_2(zone_nr_sectors)) { + ti->error = "Zone size is not a power-of-2 number of sectors"; + return -EINVAL; + } zoned_dev->zone_nr_sectors = zone_nr_sectors; zoned_dev->nr_zones = bdev_nr_zones(bdev); } @@ -804,6 +808,10 @@ static int dmz_fixup_devices(struct dm_target *ti) return -EINVAL; } zoned_dev->zone_nr_sectors = bdev_zone_sectors(bdev); + if (!is_power_of_2(zoned_dev->zone_nr_sectors)) { + ti->error = "Zone size is not a power-of-2 number of sectors"; + return -EINVAL; + } zoned_dev->nr_zones = bdev_nr_zones(bdev); }