diff options
Diffstat (limited to 'sys/xen/xenbus/xenbusb.h')
| -rw-r--r-- | sys/xen/xenbus/xenbusb.h | 46 |
1 files changed, 36 insertions, 10 deletions
diff --git a/sys/xen/xenbus/xenbusb.h b/sys/xen/xenbus/xenbusb.h index 75abb98..33008f7 100644 --- a/sys/xen/xenbus/xenbusb.h +++ b/sys/xen/xenbus/xenbusb.h @@ -41,7 +41,6 @@ * Datastructures and function declarations for use in implementing * bus attachements (e.g. frontend and backend device busses) for XenBus. */ -#include "xenbusb_if.h" /** * Enumeration of state flag values for the xbs_flags field of @@ -61,10 +60,6 @@ struct xenbusb_softc { * XenStore watch used to monitor the subtree of the * XenStore where devices for this bus attachment arrive * and depart. - * - * \note This field must be the first in the softc structure - * so that a simple cast can be used to retrieve the - * softc from within a XenStore watch event callback. */ struct xs_watch xbs_device_watch; @@ -129,14 +124,17 @@ struct xenbus_device_ivars { * XenStore watch used to monitor the subtree of the * XenStore where information about the otherend of * the split Xen device this device instance represents. - * - * \note This field must be the first in the instance - * variable structure so that a simple cast can be - * used to retrieve ivar data from within a XenStore - * watch event callback. */ struct xs_watch xd_otherend_watch; + /** + * XenStore watch used to monitor the XenStore sub-tree + * associated with this device. This watch will fire + * for modifications that we make from our domain as + * well as for those made by the control domain. + */ + struct xs_watch xd_local_watch; + /** Sleepable lock used to protect instance data. */ struct sx xd_lock; @@ -152,6 +150,9 @@ struct xenbus_device_ivars { */ char *xd_node; + /** The length of xd_node. */ + int xd_node_len; + /** XenBus device type ("vbd", "vif", etc.). */ char *xd_type; @@ -168,6 +169,9 @@ struct xenbus_device_ivars { * about the otherend of this split device instance. */ char *xd_otherend_path; + + /** The length of xd_otherend_path. */ + int xd_otherend_path_len; }; /** @@ -247,6 +251,26 @@ int xenbusb_write_ivar(device_t dev, device_t child, int index, uintptr_t value); /** + * \brief Common XenBus method implementing responses to peer state changes. + * + * \param bus The XenBus bus parent of child. + * \param child The XenBus child whose peer stat has changed. + * \param state The current state of the peer. + */ +void xenbusb_otherend_changed(device_t bus, device_t child, + enum xenbus_state state); + +/** + * \brief Common XenBus method implementing responses to local XenStore changes. + * + * \param bus The XenBus bus parent of child. + * \param child The XenBus child whose peer stat has changed. + * \param path The tree relative sub-path to the modified node. The empty + * string indicates the root of the tree was destroyed. + */ +void xenbusb_localend_changed(device_t bus, device_t child, const char *path); + +/** * \brief Attempt to add a XenBus device instance to this XenBus bus. * * \param dev The NewBus device representing this XenBus bus. @@ -269,4 +293,6 @@ int xenbusb_write_ivar(device_t dev, device_t child, int index, */ int xenbusb_add_device(device_t dev, const char *type, const char *id); +#include "xenbusb_if.h" + #endif /* _XEN_XENBUS_XENBUSB_H */ |
