blkdev_get_by_dev (9) Linux Manual Page
blkdev_get_by_dev – open a block device by device number
Synopsis
struct block_device *blkdev_get_by_dev(dev_t dev, fmode_t mode, void *holder);Arguments
dev
-
- device number of block device to open
mode
- FMODE_* mask
holder
- exclusive holder identifier
Description
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.
Context
Might sleep.
Return
Pointer to block_device on success, ERR_PTR(-errno) on failure.