1 /***************************************************************************** 2 * xenbus.h 3 * 4 * Xenbus protocol details. 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a copy 7 * of this software and associated documentation files (the "Software"), to 8 * deal in the Software without restriction, including without limitation the 9 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or 10 * sell copies of the Software, and to permit persons to whom the Software is 11 * furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be included in 14 * all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 19 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 22 * DEALINGS IN THE SOFTWARE. 23 * 24 * Copyright (C) 2005 XenSource Ltd. 25 */ 26 27 #ifndef _XEN_PUBLIC_IO_XENBUS_H 28 #define _XEN_PUBLIC_IO_XENBUS_H 29 30 /* 31 * The state of either end of the Xenbus, i.e. the current communication 32 * status of initialisation across the bus. States here imply nothing about 33 * the state of the connection between the driver and the kernel's device 34 * layers. 35 */ 36 enum xenbus_state { 37 XenbusStateUnknown = 0, 38 39 XenbusStateInitialising = 1, 40 41 /* 42 * InitWait: Finished early initialisation but waiting for information 43 * from the peer or hotplug scripts. 44 */ 45 XenbusStateInitWait = 2, 46 47 /* 48 * Initialised: Waiting for a connection from the peer. 49 */ 50 XenbusStateInitialised = 3, 51 52 XenbusStateConnected = 4, 53 54 /* 55 * Closing: The device is being closed due to an error or an unplug event. 56 */ 57 XenbusStateClosing = 5, 58 59 XenbusStateClosed = 6 60 }; 61 typedef enum xenbus_state XenbusState; 62 63 #endif /* _XEN_PUBLIC_IO_XENBUS_H */ 64 65 /* 66 * Local variables: 67 * mode: C 68 * c-set-style: "BSD" 69 * c-basic-offset: 4 70 * tab-width: 4 71 * indent-tabs-mode: nil 72 * End: 73 */ 74