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BLKDEV_GET(9) The Linux VFS BLKDEV_GET(9)

NAME

blkdev_get - open a block device

SYNOPSIS

int blkdev_get(struct block_device * bdev, fmode_t mode, void * holder);

ARGUMENTS

struct block_device * bdev

block_device to open

fmode_t mode

FMODE_* mask

void * holder

exclusive holder identifier

DESCRIPTION

Open bdev with mode. If mode includes FMODE_EXCL, bdev is open with exclusive access. Specifying FMODE_EXCL with NULL holder is invalid. Exclusive opens may nest for the same holder.

On success, the reference count of bdev is unchanged. On failure, bdev is put.

CONTEXT

Might sleep.

RETURN

0 on success, -errno on failure.

COPYRIGHT

September 2017 Kernel Hackers Manual 4.12