tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/* SPDX-License-Identifier: GPL-2.0-or-later */
2/*
3 * RDMA Network Block Driver
4 *
5 * Copyright (c) 2014 - 2018 ProfitBricks GmbH. All rights reserved.
6 * Copyright (c) 2018 - 2019 1&1 IONOS Cloud GmbH. All rights reserved.
7 * Copyright (c) 2019 - 2020 1&1 IONOS SE. All rights reserved.
8 */
9#ifndef RNBD_SRV_DEV_H
10#define RNBD_SRV_DEV_H
11
12#include <linux/fs.h>
13#include "rnbd-proto.h"
14
15struct rnbd_dev {
16 struct block_device *bdev;
17 fmode_t blk_open_flags;
18};
19
20/**
21 * rnbd_dev_open() - Open a device
22 * @path: path to open
23 * @flags: open flags
24 */
25struct rnbd_dev *rnbd_dev_open(const char *path, fmode_t flags);
26
27/**
28 * rnbd_dev_close() - Close a device
29 */
30void rnbd_dev_close(struct rnbd_dev *dev);
31
32void rnbd_endio(void *priv, int error);
33
34static inline int rnbd_dev_get_max_segs(const struct rnbd_dev *dev)
35{
36 return queue_max_segments(bdev_get_queue(dev->bdev));
37}
38
39static inline int rnbd_dev_get_max_hw_sects(const struct rnbd_dev *dev)
40{
41 return queue_max_hw_sectors(bdev_get_queue(dev->bdev));
42}
43
44static inline int rnbd_dev_get_secure_discard(const struct rnbd_dev *dev)
45{
46 return bdev_max_secure_erase_sectors(dev->bdev);
47}
48
49static inline int rnbd_dev_get_max_discard_sects(const struct rnbd_dev *dev)
50{
51 return bdev_max_discard_sectors(dev->bdev);
52}
53
54static inline int rnbd_dev_get_discard_granularity(const struct rnbd_dev *dev)
55{
56 return bdev_get_queue(dev->bdev)->limits.discard_granularity;
57}
58
59static inline int rnbd_dev_get_discard_alignment(const struct rnbd_dev *dev)
60{
61 return bdev_discard_alignment(dev->bdev);
62}
63
64#endif /* RNBD_SRV_DEV_H */