95624ae072
I/O control requests now come with the endpoint of the user process that initiated the ioctl(2) call. It is stored in a new BDEV_USER field, which is an alias for BDEV_FLAGS. The contents of this field are to be used only in highly specific situations. It should be preserved (not replaced!) by services that forward IOCTL requests, and may be set to NONE for service-initiated IOCTL requests. Change-Id: I68a01b9ce43eca00e61b985a9cf87f55ba683de4
47 lines
1.6 KiB
C
47 lines
1.6 KiB
C
#ifndef _MINIX_BDEV_H
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#define _MINIX_BDEV_H
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/* Common API. */
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extern void bdev_driver(dev_t dev, char *label);
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/* Synchronous API. */
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extern int bdev_open(dev_t dev, int access);
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extern int bdev_close(dev_t dev);
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extern ssize_t bdev_read(dev_t dev, u64_t pos, char *buf, size_t count,
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int flags);
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extern ssize_t bdev_write(dev_t dev, u64_t pos, char *buf, size_t count,
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int flags);
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extern ssize_t bdev_gather(dev_t dev, u64_t pos, iovec_t *vec, int count,
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int flags);
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extern ssize_t bdev_scatter(dev_t dev, u64_t pos, iovec_t *vec, int count,
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int flags);
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extern int bdev_ioctl(dev_t dev, int request, void *buf,
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endpoint_t user_endpt);
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/* Asynchronous API. */
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typedef int bdev_id_t;
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typedef void *bdev_param_t;
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typedef void (*bdev_callback_t)(dev_t dev, bdev_id_t id, bdev_param_t param,
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int result);
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extern void bdev_flush_asyn(dev_t dev);
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extern bdev_id_t bdev_read_asyn(dev_t dev, u64_t pos, char *buf, size_t count,
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int flags, bdev_callback_t callback, bdev_param_t param);
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extern bdev_id_t bdev_write_asyn(dev_t dev, u64_t pos, char *buf, size_t count,
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int flags, bdev_callback_t callback, bdev_param_t param);
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extern bdev_id_t bdev_gather_asyn(dev_t dev, u64_t pos, iovec_t *vec,
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int count, int flags, bdev_callback_t callback, bdev_param_t param);
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extern bdev_id_t bdev_scatter_asyn(dev_t dev, u64_t pos, iovec_t *vec,
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int count, int flags, bdev_callback_t callback, bdev_param_t param);
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extern bdev_id_t bdev_ioctl_asyn(dev_t dev, int request, void *buf,
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endpoint_t user_endpt, bdev_callback_t callback, bdev_param_t param);
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extern int bdev_wait_asyn(bdev_id_t id);
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extern void bdev_reply_asyn(message *m);
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#endif /* _MINIX_BDEV_H */
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