[RFC PATCH 1/4] block: introduce async ioctl operation
From: Kanchan Joshi <hidden>
Date: 2021-01-27 15:33:18
Also in:
io-uring, linux-fsdevel, lkml
Subsystem:
block layer, the rest · Maintainers:
Jens Axboe, Linus Torvalds
Add a new block-dev operation for async-ioctl. Driver managing the block-dev can choose to implement it. Signed-off-by: Kanchan Joshi <redacted> --- include/linux/blkdev.h | 12 ++++++++++++ 1 file changed, 12 insertions(+)
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index f94ee3089e01..c9f6cc26d675 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h@@ -1848,6 +1848,16 @@ static inline void blk_ksm_unregister(struct request_queue *q) { } #endif /* CONFIG_BLK_INLINE_ENCRYPTION */ +struct pt_ioctl_ctx { + /* submitter task context */ + struct task_struct *task; + /* callback supplied by upper layer */ + void (*pt_complete)(struct pt_ioctl_ctx *ptioc, long ret); + /* driver-allocated data */ + void *ioc_data; + /* to schedule task-work */ + struct callback_head pt_work; +}; struct block_device_operations { blk_qc_t (*submit_bio) (struct bio *bio);
@@ -1856,6 +1866,8 @@ struct block_device_operations { int (*rw_page)(struct block_device *, sector_t, struct page *, unsigned int); int (*ioctl) (struct block_device *, fmode_t, unsigned, unsigned long); int (*compat_ioctl) (struct block_device *, fmode_t, unsigned, unsigned long); + int (*async_ioctl) (struct block_device *, fmode_t, unsigned, unsigned long, + struct pt_ioctl_ctx *); unsigned int (*check_events) (struct gendisk *disk, unsigned int clearing); void (*unlock_native_capacity) (struct gendisk *);
--
2.25.1
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