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83 lines
2.1 KiB
83 lines
2.1 KiB
/* SPDX-License-Identifier: GPL-2.0-or-later */ |
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/* |
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* RDMA Network Block Driver |
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* |
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* Copyright (c) 2014 - 2018 ProfitBricks GmbH. All rights reserved. |
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* Copyright (c) 2018 - 2019 1&1 IONOS Cloud GmbH. All rights reserved. |
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* Copyright (c) 2019 - 2020 1&1 IONOS SE. All rights reserved. |
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*/ |
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#ifndef RNBD_SRV_DEV_H |
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#define RNBD_SRV_DEV_H |
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#include <linux/fs.h> |
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#include "rnbd-proto.h" |
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struct rnbd_dev { |
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struct block_device *bdev; |
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struct bio_set *ibd_bio_set; |
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fmode_t blk_open_flags; |
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char name[BDEVNAME_SIZE]; |
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}; |
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struct rnbd_dev_blk_io { |
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struct rnbd_dev *dev; |
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void *priv; |
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/* have to be last member for front_pad usage of bioset_init */ |
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struct bio bio; |
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}; |
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/** |
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* rnbd_dev_open() - Open a device |
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* @flags: open flags |
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* @bs: bio_set to use during block io, |
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*/ |
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struct rnbd_dev *rnbd_dev_open(const char *path, fmode_t flags, |
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struct bio_set *bs); |
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/** |
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* rnbd_dev_close() - Close a device |
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*/ |
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void rnbd_dev_close(struct rnbd_dev *dev); |
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void rnbd_endio(void *priv, int error); |
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void rnbd_dev_bi_end_io(struct bio *bio); |
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struct bio *rnbd_bio_map_kern(void *data, struct bio_set *bs, |
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unsigned int len, gfp_t gfp_mask); |
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static inline int rnbd_dev_get_max_segs(const struct rnbd_dev *dev) |
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{ |
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return queue_max_segments(bdev_get_queue(dev->bdev)); |
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} |
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static inline int rnbd_dev_get_max_hw_sects(const struct rnbd_dev *dev) |
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{ |
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return queue_max_hw_sectors(bdev_get_queue(dev->bdev)); |
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} |
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static inline int rnbd_dev_get_secure_discard(const struct rnbd_dev *dev) |
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{ |
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return blk_queue_secure_erase(bdev_get_queue(dev->bdev)); |
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} |
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static inline int rnbd_dev_get_max_discard_sects(const struct rnbd_dev *dev) |
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{ |
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if (!blk_queue_discard(bdev_get_queue(dev->bdev))) |
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return 0; |
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return blk_queue_get_max_sectors(bdev_get_queue(dev->bdev), |
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REQ_OP_DISCARD); |
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} |
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static inline int rnbd_dev_get_discard_granularity(const struct rnbd_dev *dev) |
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{ |
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return bdev_get_queue(dev->bdev)->limits.discard_granularity; |
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} |
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static inline int rnbd_dev_get_discard_alignment(const struct rnbd_dev *dev) |
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{ |
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return bdev_get_queue(dev->bdev)->limits.discard_alignment; |
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} |
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#endif /* RNBD_SRV_DEV_H */
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