91 lines
3.3 KiB
C
91 lines
3.3 KiB
C
/*-
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* Copyright (c) 2014-2022 Hans Petter Selasky. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef _CUSE_IOCTL_H_
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#define _CUSE_IOCTL_H_
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#include <sys/ioccom.h>
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#include <sys/types.h>
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#define CUSE_BUFFER_MAX (1 << 12) /* bytes */
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#define CUSE_DEVICES_MAX 64 /* units */
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#define CUSE_BUF_MIN_PTR 0x10000UL
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#define CUSE_BUF_MAX_PTR 0x20000UL
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#define CUSE_ALLOC_UNIT_MAX 128UL /* units */
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#define CUSE_ALLOC_UNIT_SHIFT 24 /* bits */
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/* All memory allocations must be less than the following limit */
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#define CUSE_ALLOC_BYTES_MAX \
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(CUSE_ALLOC_UNIT_MAX << CUSE_ALLOC_UNIT_SHIFT) /* bytes */
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struct cuse_dev;
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struct cuse_data_chunk {
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uintptr_t local_ptr;
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uintptr_t peer_ptr;
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unsigned long length;
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};
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struct cuse_alloc_info {
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unsigned long page_count;
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unsigned long alloc_nr;
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};
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struct cuse_command {
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struct cuse_dev *dev;
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unsigned long fflags;
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uintptr_t per_file_handle;
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uintptr_t data_pointer;
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unsigned long argument;
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unsigned long command; /* see CUSE_CMD_XXX */
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};
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struct cuse_create_dev {
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struct cuse_dev *dev;
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uid_t user_id;
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gid_t group_id;
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int permissions;
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char devname[80]; /* /dev/xxxxx */
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};
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/* Definition of internal IOCTLs for /dev/cuse */
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#define CUSE_IOCTL_GET_COMMAND _IOR('C', 0, struct cuse_command)
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#define CUSE_IOCTL_WRITE_DATA _IOW('C', 1, struct cuse_data_chunk)
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#define CUSE_IOCTL_READ_DATA _IOW('C', 2, struct cuse_data_chunk)
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#define CUSE_IOCTL_SYNC_COMMAND _IOW('C', 3, int)
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#define CUSE_IOCTL_GET_SIG _IOR('C', 4, int)
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#define CUSE_IOCTL_ALLOC_MEMORY _IOW('C', 5, struct cuse_alloc_info)
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#define CUSE_IOCTL_FREE_MEMORY _IOW('C', 6, struct cuse_alloc_info)
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#define CUSE_IOCTL_SET_PFH _IOW('C', 7, uintptr_t)
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#define CUSE_IOCTL_CREATE_DEV _IOW('C', 8, struct cuse_create_dev)
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#define CUSE_IOCTL_DESTROY_DEV _IOW('C', 9, struct cuse_dev *)
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#define CUSE_IOCTL_ALLOC_UNIT _IOR('C',10, int)
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#define CUSE_IOCTL_FREE_UNIT _IOW('C',11, int)
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#define CUSE_IOCTL_SELWAKEUP _IOW('C',12, int)
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#define CUSE_IOCTL_ALLOC_UNIT_BY_ID _IOWR('C',13, int)
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#define CUSE_IOCTL_FREE_UNIT_BY_ID _IOWR('C',14, int)
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#endif /* _CUSE_IOCTL_H_ */
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