diff options
| author | Christoph Hellwig | 2020-11-03 11:00:11 +0100 |
|---|---|---|
| committer | Jens Axboe | 2020-11-16 08:14:29 -0700 |
| commit | e00adcadf3af7a8335026d71ab9f0e0a922191ac (patch) | |
| tree | 7d7f22326e387ef08b23cf9a3a76e6f16fc1b089 | |
| parent | 4a9d6d667f0bafed55a9e9f5ae8bceb3680749d7 (diff) | |
block: add a new set_read_only method
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@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
| -rw-r--r-- | block/ioctl.c | 5 | ||||
| -rw-r--r-- | include/linux/blkdev.h | 1 |
2 files changed, 6 insertions, 0 deletions
diff --git a/block/ioctl.c b/block/ioctl.c index c6d8863f0409..a6fa16b97705 100644 --- a/block/ioctl.c +++ b/block/ioctl.c @@ -389,6 +389,11 @@ 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 639cae2c158b..5c1ba8a8d2bc 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -1850,6 +1850,7 @@ 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, |