blkdev_get_by_dev (9) - Linux Manuals

blkdev_get_by_dev: open a block device by device number

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.

RETURN

Pointer to block_device on success, ERR_PTR(-errno) on failure.

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