The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/xen/xenbus/xenbusb_if.m

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    1 #-
    2 # Copyright (c) 2010 Spectra Logic Corporation
    3 # All rights reserved.
    4 #
    5 # Redistribution and use in source and binary forms, with or without
    6 # modification, are permitted provided that the following conditions
    7 # are met:
    8 # 1. Redistributions of source code must retain the above copyright
    9 #    notice, this list of conditions, and the following disclaimer,
   10 #    without modification.
   11 # 2. Redistributions in binary form must reproduce at minimum a disclaimer
   12 #    substantially similar to the "NO WARRANTY" disclaimer below
   13 #    ("Disclaimer") and any redistribution must be conditioned upon
   14 #    including a substantially similar Disclaimer requirement for further
   15 #    binary redistribution.
   16 #
   17 # NO WARRANTY
   18 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   19 # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   20 # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
   21 # A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
   22 # HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   23 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   24 # OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   25 # HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
   26 # STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
   27 # IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   28 # POSSIBILITY OF SUCH DAMAGES.
   29 #
   30 # $FreeBSD: releng/8.2/sys/xen/xenbus/xenbusb_if.m 215788 2010-11-24 01:03:03Z gibbs $
   31 #
   32 
   33 #include <sys/bus.h>
   34 
   35 HEADER {
   36 struct xenbus_device_ivars;
   37 }
   38 
   39 INTERFACE xenbusb;
   40 
   41 /**
   42  * \brief Enumerate all devices of the given type on this bus.
   43  *
   44  * \param _dev  NewBus device_t for this XenBus (front/back) bus instance.
   45  * \param _type String indicating the device sub-tree (e.g. "vfb", "vif")
   46  *              to enumerate. 
   47  *
   48  * \return  On success, 0. Otherwise an errno value indicating the
   49  *          type of failure.
   50  *
   51  * Devices that are found should be entered into the NewBus hierarchy via
   52  * xenbusb_add_device().  xenbusb_add_device() ignores duplicate detects
   53  * and ignores duplicate devices, so it can be called unconditionally
   54  * for any device found in the XenStore.
   55  */
   56 METHOD int enumerate_type {
   57         device_t _dev;
   58         const char *_type;
   59 };
   60 
   61 /**
   62  * \brief Determine and store the XenStore path for the other end of
   63  *        a split device whose local end is represented by ivars.
   64  *
   65  * If successful, the xd_otherend_path field of the child's instance
   66  * variables must be updated.
   67  *
   68  * \param _dev    NewBus device_t for this XenBus (front/back) bus instance.
   69  * \param _ivars  Instance variables from the XenBus child device for
   70  *                which to perform this function.
   71  *
   72  * \return  On success, 0. Otherwise an errno value indicating the
   73  *          type of failure.
   74  */
   75 METHOD int get_otherend_node {
   76         device_t _dev;
   77         struct xenbus_device_ivars *_ivars;
   78 }

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