xen: add xenfs to allow usermode <-> Xen interaction (1107ba88) · Commits · 戴 / test

drivers/xen/Kconfig

+24 −0

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		@@ -17,3 +17,27 @@ config XEN_SCRUB_PAGES
		is not accidentally visible to other domains. Is it more
		secure, but slightly less efficient.
		If in doubt, say yes.

		config XENFS
		tristate "Xen filesystem"
		depends on XEN
		default y
		help
		The xen filesystem provides a way for domains to share
		information with each other and with the hypervisor.
		For example, by reading and writing the "xenbus" file, guests
		may pass arbitrary information to the initial domain.
		If in doubt, say yes.

		config XEN_COMPAT_XENFS
		bool "Create compatibility mount point /proc/xen"
		depends on XENFS
		default y
		help
		The old xenstore userspace tools expect to find "xenbus"
		under /proc/xen, but "xenbus" is now found at the root of the
		xenfs filesystem. Selecting this causes the kernel to create
		the compatibilty mount point /proc/xen if it is running on
		a xen platform.
		If in doubt, say yes.

+2 −0

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		obj-y += grant-table.o features.o events.o manage.o
		obj-y += xenbus/

		obj-$(CONFIG_HOTPLUG_CPU) += cpu_hotplug.o
		obj-$(CONFIG_XEN_XENCOMM) += xencomm.o
		obj-$(CONFIG_XEN_BALLOON) += balloon.o
		obj-$(CONFIG_XENFS) += xenfs/
		No newline at end of file

+22 −6

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		@@ -40,6 +40,7 @@
		#include <linux/ctype.h>
		#include <linux/fcntl.h>
		#include <linux/mm.h>
		#include <linux/proc_fs.h>
		#include <linux/notifier.h>
		#include <linux/kthread.h>
		#include <linux/mutex.h>
		@@ -55,7 +56,10 @@
		#include "xenbus_comms.h"
		#include "xenbus_probe.h"


		int xen_store_evtchn;
		EXPORT_SYMBOL(xen_store_evtchn);

		struct xenstore_domain_interface *xen_store_interface;
		static unsigned long xen_store_mfn;

		@@ -166,6 +170,9 @@ static int read_backend_details(struct xenbus_device *xendev)
		return read_otherend_details(xendev, "backend-id", "backend");
		}

		static struct device_attribute xenbus_dev_attrs[] = {
		__ATTR_NULL
		};

		/* Bus type for frontend drivers. */
		static struct xen_bus_type xenbus_frontend = {
		@@ -180,6 +187,7 @@ static struct xen_bus_type xenbus_frontend = {
		.probe = xenbus_dev_probe,
		.remove = xenbus_dev_remove,
		.shutdown = xenbus_dev_shutdown,
		.dev_attrs = xenbus_dev_attrs,
		},
		};

		@@ -852,6 +860,14 @@ static int __init xenbus_probe_init(void)
		if (!xen_initial_domain())
		xenbus_probe(NULL);

		#ifdef CONFIG_XEN_COMPAT_XENFS
		/*
		* Create xenfs mountpoint in /proc for compatibility with
		* utilities that expect to find "xenbus" under "/proc/xen".
		*/
		proc_mkdir("xen", NULL);
		#endif

		return 0;

		out_unreg_back:

+1 −0

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		@@ -184,6 +184,7 @@ void xenbus_dev_request_and_reply(struct xsd_sockmsg msg)

		return ret;
		}
		EXPORT_SYMBOL(xenbus_dev_request_and_reply);

		/* Send message to xs, get kmalloc'ed reply. ERR_PTR() on error. */
		static void *xs_talkv(struct xenbus_transaction t,

0 → 100644

+3 −0