Hello, I am calling XenBus_AddWatch API from a DomU guest in the win-pvdrivers xenpci driver, and noticed that I am not able to watch xenstore entries that are outside of the DomU's xenstore tree. For example, the following call in XenPci_EvtDeviceD0EntryPostInterruptsEnabled fails with response="EIO" even if the xenstore permissions for Container and Container/DomU in xenstore are both "b0":
response = XenBus_AddWatch(xpdd, XN_BASE_GLOBAL, "Container/DomU", MyCallback, xpdd); However, the following call works and it watches a xenstore entry relative to DomUs xenstore tree: response = XenBus_AddWatch(xpdd, XBT_NIL, "DomU", MyCallback, xpdd); Writing to an entry outside the DomUs tree is allowed if permissions are b0: result = XnWriteString(xpdd, XN_BASE_GLOBAL, "Container/DomU", buffer); It seems like DomUs should be allowed to watch xenstore entries outside their trees. Is this a bug or is it by design? Thanks. _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel
