FreeBSD/Linux Kernel Cross Reference
sys/fs/cuse/cuse_ioctl.h

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

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