This is a note to let you know that I've just added the patch titled
block: add a new set_read_only method
to the 5.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
block-add-a-new-set_read_only-method.patch
and it can be found in the queue-5.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 033470fd2bd01bb3c90d5f94ca3967c0ebcfc862
Author: Christoph Hellwig <hch@xxxxxx>
Date: Tue Nov 3 11:00:11 2020 +0100
block: add a new set_read_only method
[ Upstream commit e00adcadf3af7a8335026d71ab9f0e0a922191ac ]
Add a new method to allow for driver-specific processing when setting or
clearing the block device read-only state. This allows to replace the
cumbersome and error-prone override of the whole ioctl implementation.
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
Signed-off-by: Jens Axboe <axboe@xxxxxxxxx>
Stable-dep-of: 9674f54e41ff ("md: Don't clear MD_CLOSING when the raid is about to stop")
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/block/ioctl.c b/block/ioctl.c
index e7eed7dadb5cf..24f8042f12b60 100644
--- a/block/ioctl.c
+++ b/block/ioctl.c
@@ -405,6 +405,11 @@ static int blkdev_roset(struct block_device *bdev, fmode_t mode,
return ret;
if (get_user(n, (int __user *)arg))
return -EFAULT;
+ if (bdev->bd_disk->fops->set_read_only) {
+ ret = bdev->bd_disk->fops->set_read_only(bdev, n);
+ if (ret)
+ return ret;
+ }
set_device_ro(bdev, n);
return 0;
}
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 98fdf5a31fd66..583824f111079 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -1883,6 +1883,7 @@ struct block_device_operations {
void (*unlock_native_capacity) (struct gendisk *);
int (*revalidate_disk) (struct gendisk *);
int (*getgeo)(struct block_device *, struct hd_geometry *);
+ int (*set_read_only)(struct block_device *bdev, bool ro);
/* this callback is with swap_lock and sometimes page table lock held */
void (*swap_slot_free_notify) (struct block_device *, unsigned long);
int (*report_zones)(struct gendisk *, sector_t sector,
