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Wed, 3 Aug 2022 09:48:11 +0000 (GMT) Received: from eusmgms2.samsung.com (unknown [182.198.249.180]) by eusmtrp1.samsung.com (KnoxPortal) with ESMTP id 20220803094811eusmtrp1ba4f7f94f43e6937f2a29d964ceaf11c~HzLr5us1F2000320003eusmtrp1Y; Wed, 3 Aug 2022 09:48:11 +0000 (GMT) X-AuditID: cbfec7f2-d81ff700000025c0-8e-62ea445bc010 Received: from eusmtip2.samsung.com ( [203.254.199.222]) by eusmgms2.samsung.com (EUCPMTA) with SMTP id 07.9B.09038.A544AE26; Wed, 3 Aug 2022 10:48:11 +0100 (BST) Received: from localhost (unknown [106.210.248.112]) by eusmtip2.samsung.com (KnoxPortal) with ESMTPA id 20220803094810eusmtip2b837e592c0d57ed90af9168ead84a75c~HzLrkbg3V1623616236eusmtip29; Wed, 3 Aug 2022 09:48:10 +0000 (GMT) From: Pankaj Raghav To: Johannes.Thumshirn@wdc.com, snitzer@kernel.org, axboe@kernel.dk, damien.lemoal@opensource.wdc.com, agk@redhat.com, hch@lst.de Cc: dm-devel@redhat.com, matias.bjorling@wdc.com, gost.dev@samsung.com, linux-kernel@vger.kernel.org, pankydev8@gmail.com, jaegeuk@kernel.org, hare@suse.de, linux-block@vger.kernel.org, linux-nvme@lists.infradead.org, bvanassche@acm.org, Luis Chamberlain , Pankaj Raghav Subject: [PATCH v9 08/13] dm-zoned: ensure only power of 2 zone sizes are allowed Date: Wed, 3 Aug 2022 11:47:56 +0200 Message-Id: <20220803094801.177490-9-p.raghav@samsung.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220803094801.177490-1-p.raghav@samsung.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFnrCKsWRmVeSWpSXmKPExsWy7djPc7rRLq+SDM5+NrZYf+oYs8Xqu/1s FtM+/GS2+H32PLPF3nezWS1uHtjJZLFn0SQmi5WrjzJZPFk/i9nib9c9Jou9t7QtLu+aw2Yx f9lTdosJbV+ZLW5MeMpo8XlpC7vFmptPWSxO3JJ2EPK4fMXbY+esu+wel8+Wemxa1cnmsXlJ vcfumw1sHjtb77N6vN93lc2jb8sqRo/Np6s9Pm+S82g/0M0UwBPFZZOSmpNZllqkb5fAlXF8 +hmWgr3cFX/nvmdtYFzH2cXIySEhYCKxc9cV1i5GLg4hgRWMEpvO72OHcL4wSix9vxjK+cwo 8fT9RRaYlv0PH0G1LGeU2PtoEpTzklHi7OofQA4HB5uAlkRjJ1i3iEAzo8Tdvz1gRcwCB5gk Fr3+wQgySlggWGLqqx1MIA0sAqoSJ65EgoR5Bawkmg89Y4bYJi8x89J3dhCbU8BaYsq/f8wQ NYISJ2c+AbuIGaimeetsZpD5EgK7OSUe3z7LCNHsIvH14nGos4UlXh3fwg5hy0icntwDFa+W eHrjN1RzC6NE/871bCAHSQBt6zuTA2IyC2hKrN+lDxF1lOh94Qth8knceCsIcQGfxKRt05kh wrwSHW1CELOVJHb+fAK1U0LictMcqJ0eEltf3mWewKg4C8kvs5D8Mgth7QJG5lWM4qmlxbnp qcWGeanlesWJucWleel6yfm5mxiBCfH0v+OfdjDOffVR7xAjEwfjIUYJDmYlEd47Ls+ThHhT EiurUovy44tKc1KLDzFKc7AoifMmZ25IFBJITyxJzU5NLUgtgskycXBKNTC1mfEsnBhTnH89 fv8xJ/Fd2dNmGMZa/BeYPePNh9rIRetjklqLFoUoGEXONFw84fj+BX2XFTQYQor2iMV/lu67 FWsu7zjr5KLOdSI3Kl1L2QoXLK9wfqG00Wp13dqPKgpnkq8nz+WpvdhvKr+8711/GsOHOYUn nMRzkjkXqnHo2PxVzQmJP72N54HI/ovPFyYxrjcwi9z/t/FWQVp+u17xAnetl0F7NgonH/G+ c+B0W2mgiOMVE2af7sbrLLNfT3C+r2t2JWD/gq9MMavPivrs+bF9SdlDX8/o3M7a9AV5732s phscru0Qy53fNMtPSdAzcEpX3W1eq/X8cWVuZjMOOYnJsm+JSVLcoXaYU4mlOCPRUIu5qDgR ALVI1Yn3AwAA X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFrrMIsWRmVeSWpSXmKPExsVy+t/xe7rRLq+SDNZcZrRYf+oYs8Xqu/1s FtM+/GS2+H32PLPF3nezWS1uHtjJZLFn0SQmi5WrjzJZPFk/i9nib9c9Jou9t7QtLu+aw2Yx f9lTdosJbV+ZLW5MeMpo8XlpC7vFmptPWSxO3JJ2EPK4fMXbY+esu+wel8+Wemxa1cnmsXlJ vcfumw1sHjtb77N6vN93lc2jb8sqRo/Np6s9Pm+S82g/0M0UwBOlZ1OUX1qSqpCRX1xiqxRt aGGkZ2hpoWdkYqlnaGwea2VkqqRvZ5OSmpNZllqkb5egl3F8+hmWgr3cFX/nvmdtYFzH2cXI ySEhYCKx/+EjVhBbSGApo8T1S5IQcQmJ2wubGCFsYYk/17rYuhi5gGqeM0osOvCduYuRg4NN QEuisZMdJC4i0M0ocfnMOVYQh1ngHJPE8+9dYN3CAoESy7dfZwFpYBFQlThxJRIkzCtgJdF8 6BkzxAJ5iZmXvrOD2JwC1hJT/v1jhjjISmLd31msEPWCEidnPmEBsZmB6pu3zmaewCgwC0lq FpLUAkamVYwiqaXFuem5xUZ6xYm5xaV56XrJ+bmbGIGxu+3Yzy07GFe++qh3iJGJg/EQowQH s5II7x2X50lCvCmJlVWpRfnxRaU5qcWHGE2Bzp7ILCWanA9MHnkl8YZmBqaGJmaWBqaWZsZK 4ryeBR2JQgLpiSWp2ampBalFMH1MHJxSDUy8DglX0y5Os9431+SK32yn9srn2cviUpdsjzvU +Pm0pvmsys28b973PDlXf2V1bHqUiPOurFzhokVHlMq3RMSm9H97/HdRvVznunfmdcdqM+Zo qSZLPmqxPB951fb9ar+Lrz5YTl7w5NXkl4Hbiw6631adkyf+jlGJ42ez6DsfaS5BNY0ZiT88 NXsNVjxjSH+YH7rpzwGV+yGx/YcLHZsiMqpqV5znuBx8aOpa9x0vf8i6zzz9lJ9vGV9J8DOd uQw3dOS27eovfJUT7SZyJmjT1wn7rgZvc/rbKBQZYLdx5zNbZe5vJQxbeW8mJWzea/2j7kPt wjXF4i1blRNj9zou0WXfWFjwbMs1jYe+Oz8qsRRnJBpqMRcVJwIARSsy8WYDAAA= X-CMS-MailID: 20220803094811eucas1p17a2ac191899bba7938de6b9e3a55352f X-Msg-Generator: CA Content-Type: text/plain; charset="utf-8" X-RootMTR: 20220803094811eucas1p17a2ac191899bba7938de6b9e3a55352f X-EPHeader: CA CMS-TYPE: 201P X-CMS-RootMailID: 20220803094811eucas1p17a2ac191899bba7938de6b9e3a55352f References: <20220803094801.177490-1-p.raghav@samsung.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@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 non po2 support is added. Reviewed-by: Hannes Reinecke 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); } -- 2.25.1