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[93.105.62.173]) by smtp.googlemail.com with ESMTPSA id a640c23a62f3a-a868f21fe5esm13755866b.8.2024.08.21.14.31.26 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 21 Aug 2024 14:31:26 -0700 (PDT) From: =?UTF-8?q?=C5=81ukasz=20Patron?= To: priv.luk@gmail.com Cc: Alasdair Kergon , Mike Snitzer , Mikulas Patocka , dm-devel@lists.linux.dev, linux-kernel@vger.kernel.org Subject: [PATCH] dm: Implement set_read_only Date: Wed, 21 Aug 2024 23:30:41 +0200 Message-ID: <20240821213048.726082-1-priv.luk@gmail.com> X-Mailer: git-send-email 2.46.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable This lets us change the read-only flag for device mapper block devices via the BLKROSET ioctl. Signed-off-by: =C5=81ukasz Patron --- drivers/md/dm.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/md/dm.c b/drivers/md/dm.c index 87bb90303435..538a93e596d7 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -410,6 +410,12 @@ static int dm_blk_getgeo(struct block_device *bdev, st= ruct hd_geometry *geo) return dm_get_geometry(md, geo); } =20 +static int dm_blk_set_read_only(struct block_device *bdev, bool ro) +{ + set_disk_ro(bdev->bd_disk, ro); + return 0; +} + static int dm_prepare_ioctl(struct mapped_device *md, int *srcu_idx, struct block_device **bdev) { @@ -3666,6 +3672,7 @@ static const struct block_device_operations dm_blk_do= ps =3D { .release =3D dm_blk_close, .ioctl =3D dm_blk_ioctl, .getgeo =3D dm_blk_getgeo, + .set_read_only =3D dm_blk_set_read_only, .report_zones =3D dm_blk_report_zones, .pr_ops =3D &dm_pr_ops, .owner =3D THIS_MODULE --=20 2.46.0