other versions
BLKDEV_GET_BY_DEV(9) | The Linux VFS | BLKDEV_GET_BY_DEV(9) |
NAME¶
blkdev_get_by_dev - open a block device by device numberSYNOPSIS¶
struct block_device *
blkdev_get_by_dev(dev_t dev,
fmode_t mode,
void * holder);
ARGUMENTS¶
devdevice 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.COPYRIGHT¶
January 2017 | Kernel Hackers Manual 4.8. |