| BLKDEV_GET_BY_DEV(9) | The Linux VFS | BLKDEV_GET_BY_DEV(9) |
NAME¶
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.
RETURNS¶
Pointer to block_device on success, ERR_PTR(-errno) on failure.
COPYRIGHT¶
| June 2024 | Kernel Hackers Manual 3.10 |