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bbd3e06436
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>
19 lines
527 B
C
19 lines
527 B
C
#ifndef LINUX_PR_H
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#define LINUX_PR_H
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#include <uapi/linux/pr.h>
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struct pr_ops {
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int (*pr_register)(struct block_device *bdev, u64 old_key, u64 new_key,
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u32 flags);
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int (*pr_reserve)(struct block_device *bdev, u64 key,
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enum pr_type type, u32 flags);
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int (*pr_release)(struct block_device *bdev, u64 key,
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enum pr_type type);
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int (*pr_preempt)(struct block_device *bdev, u64 old_key, u64 new_key,
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enum pr_type type, bool abort);
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int (*pr_clear)(struct block_device *bdev, u64 key);
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};
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#endif /* LINUX_PR_H */
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