mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-22 00:40:03 +00:00
![Christoph Hellwig](/assets/img/avatar_default.png)
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: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@fb.com>
18 lines
527 B
C
18 lines
527 B
C
#ifndef LINUX_PR_H
|
|
#define LINUX_PR_H
|
|
|
|
#include <uapi/linux/pr.h>
|
|
|
|
struct pr_ops {
|
|
int (*pr_register)(struct block_device *bdev, u64 old_key, u64 new_key,
|
|
u32 flags);
|
|
int (*pr_reserve)(struct block_device *bdev, u64 key,
|
|
enum pr_type type, u32 flags);
|
|
int (*pr_release)(struct block_device *bdev, u64 key,
|
|
enum pr_type type);
|
|
int (*pr_preempt)(struct block_device *bdev, u64 old_key, u64 new_key,
|
|
enum pr_type type, bool abort);
|
|
int (*pr_clear)(struct block_device *bdev, u64 key);
|
|
};
|
|
|
|
#endif /* LINUX_PR_H */
|