BLKDEV_GET_BY_DEV(9) The Linux VFS BLKDEV_GET_BY_DEV(9)NAMEblkdev_get_by_dev - open a block device by device number
struct block_device * blkdev_get_by_dev(dev_t dev, fmode_t mode,
void * holder);
device number of block device to open
exclusive holder identifier
Open the blockdevice described by device number dev. mode and holder
are identical to blkdev_get.
Use it ONLY if you really do not have anything better - i.e. when you
are behind a truly sucky interface and all you are given is a device
number. _Never_ to be used for internal purposes. If you ever need it -
reconsider your API.
On success, the returned block_device has reference count of one.
Pointer to block_device on success, ERR_PTR(-errno) on failure.
COPYRIGHTKernel Hackers Manual 3.8. June 2014 BLKDEV_GET_BY_DEV(9)