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 
15 struct rnbd_dev {
16 	struct block_device	*bdev;
17 	fmode_t			blk_open_flags;
18 	char			name[BDEVNAME_SIZE];
19 };
20 
21 /**
22  * rnbd_dev_open() - Open a device
23  * @path:	path to open
24  * @flags:	open flags
25  */
26 struct rnbd_dev *rnbd_dev_open(const char *path, fmode_t flags);
27 
28 /**
29  * rnbd_dev_close() - Close a device
30  */
31 void rnbd_dev_close(struct rnbd_dev *dev);
32 
33 void rnbd_endio(void *priv, int error);
34 
rnbd_dev_get_max_segs(const struct rnbd_dev * dev)35 static inline int rnbd_dev_get_max_segs(const struct rnbd_dev *dev)
36 {
37 	return queue_max_segments(bdev_get_queue(dev->bdev));
38 }
39 
rnbd_dev_get_max_hw_sects(const struct rnbd_dev * dev)40 static inline int rnbd_dev_get_max_hw_sects(const struct rnbd_dev *dev)
41 {
42 	return queue_max_hw_sectors(bdev_get_queue(dev->bdev));
43 }
44 
rnbd_dev_get_secure_discard(const struct rnbd_dev * dev)45 static inline int rnbd_dev_get_secure_discard(const struct rnbd_dev *dev)
46 {
47 	return bdev_max_secure_erase_sectors(dev->bdev);
48 }
49 
rnbd_dev_get_max_discard_sects(const struct rnbd_dev * dev)50 static inline int rnbd_dev_get_max_discard_sects(const struct rnbd_dev *dev)
51 {
52 	return bdev_max_discard_sectors(dev->bdev);
53 }
54 
rnbd_dev_get_discard_granularity(const struct rnbd_dev * dev)55 static inline int rnbd_dev_get_discard_granularity(const struct rnbd_dev *dev)
56 {
57 	return bdev_get_queue(dev->bdev)->limits.discard_granularity;
58 }
59 
rnbd_dev_get_discard_alignment(const struct rnbd_dev * dev)60 static inline int rnbd_dev_get_discard_alignment(const struct rnbd_dev *dev)
61 {
62 	return bdev_discard_alignment(dev->bdev);
63 }
64 
65 #endif /* RNBD_SRV_DEV_H */
66