82a29e3048
A Xen PV frontend communicates its state to the PV backend by writing to the 'state' key in the frontend area in xenstore. It is therefore necessary for a XenDevice implementation to be notified whenever the value of this key changes. This patch adds code to do this as follows: - an 'fd handler' is registered on the libxenstore handle which will be triggered whenever a 'watch' event occurs - primitives are added to xen-bus-helper to add or remove watch events - a list of Notifier objects is added to XenBus to provide a mechanism to call the appropriate 'watch handler' when its associated event occurs The xen-block implementation is extended with a 'frontend_changed' method, which calls as-yet stub 'connect' and 'disconnect' functions when the relevant frontend state transitions occur. A subsequent patch will supply a full implementation for these functions. Signed-off-by: Paul Durrant <paul.durrant@citrix.com> Reviewed-by: Anthony Perard <anthony.perard@citrix.com> Signed-off-by: Anthony PERARD <anthony.perard@citrix.com> |
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.. | ||
Makefile.objs | ||
trace-events | ||
xen_devconfig.c | ||
xen_pt_config_init.c | ||
xen_pt_graphics.c | ||
xen_pt_load_rom.c | ||
xen_pt_msi.c | ||
xen_pt.c | ||
xen_pt.h | ||
xen_pvdev.c | ||
xen-bus-helper.c | ||
xen-bus.c | ||
xen-common.c | ||
xen-host-pci-device.c | ||
xen-host-pci-device.h | ||
xen-legacy-backend.c |