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)35static 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)40static 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)45static 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)50static 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)55static 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)60static 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