• Christoph Hellwig's avatar
    block: add an API for Persistent Reservations · bbd3e064
    Christoph Hellwig authored
    This commits adds a driver API and ioctls for controlling Persistent
    Reservations s/genericly/generically/ at the block layer.  Persistent
    Reservations are supported by SCSI and NVMe and allow controlling who gets
    access to a device in a shared storage setup.
    Note that we add a pr_ops structure to struct block_device_operations
    instead of adding the members directly to avoid bloating all instances
    of devices that will never support Persistent Reservations.
    Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
    Signed-off-by: default avatarJens Axboe <axboe@fb.com>
ioctl.c 14.6 KB