xen: clean up xenbus internal headers

The xenbus driver has an awful mixture of internally and globally visible headers: some of the internally used only stuff is defined in the global header include/xen/xenbus.h while some stuff defined in internal headers is used by other drivers, too. Clean this up by moving the externally used symbols to include/xen/xenbus.h and the symbols used internally only to a new header drivers/xen/xenbus/xenbus.h replacing xenbus_comms.h and xenbus_probe.h Signed-off-by: Juergen Gross <[email protected]> Reviewed-by: Boris Ostrovsky <[email protected]> Signed-off-by: Boris Ostrovsky <[email protected]>
torvalds · Feb 9, 2017 · 332f791 · 332f791
1 parent c0d197d
commit 332f791
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Showing 13 changed files with 52 additions and 100 deletions.
diff --git a/drivers/xen/xenbus/xenbus_probe.h → drivers/xen/xenbus/xenbus.h b/drivers/xen/xenbus/xenbus_probe.h → drivers/xen/xenbus/xenbus.h
@@ -1,7 +1,5 @@
-/******************************************************************************
- * xenbus_probe.h
- *
- * Talks to Xen Store to figure out what devices we have.
+/*
+ * Private include for xenbus communications.
  *
  * Copyright (C) 2005 Rusty Russell, IBM Corporation
  * Copyright (C) 2005 XenSource Ltd.
@@ -31,8 +29,8 @@
  * IN THE SOFTWARE.
  */
 
-#ifndef _XENBUS_PROBE_H
-#define _XENBUS_PROBE_H
+#ifndef _XENBUS_XENBUS_H
+#define _XENBUS_XENBUS_H
 
 #define XEN_BUS_ID_SIZE			20
 
@@ -54,35 +52,46 @@ enum xenstore_init {
 	XS_LOCAL,
 };
 
+extern enum xenstore_init xen_store_domain_type;
 extern const struct attribute_group *xenbus_dev_groups[];
 
-extern int xenbus_match(struct device *_dev, struct device_driver *_drv);
-extern int xenbus_dev_probe(struct device *_dev);
-extern int xenbus_dev_remove(struct device *_dev);
-extern int xenbus_register_driver_common(struct xenbus_driver *drv,
-					 struct xen_bus_type *bus,
-					 struct module *owner,
-					 const char *mod_name);
-extern int xenbus_probe_node(struct xen_bus_type *bus,
-			     const char *type,
-			     const char *nodename);
-extern int xenbus_probe_devices(struct xen_bus_type *bus);
+int xs_init(void);
+int xb_init_comms(void);
+void xb_deinit_comms(void);
+int xb_write(const void *data, unsigned int len);
+int xb_read(void *data, unsigned int len);
+int xb_data_to_read(void);
+int xb_wait_for_data_to_read(void);
+
+int xenbus_match(struct device *_dev, struct device_driver *_drv);
+int xenbus_dev_probe(struct device *_dev);
+int xenbus_dev_remove(struct device *_dev);
+int xenbus_register_driver_common(struct xenbus_driver *drv,
+				  struct xen_bus_type *bus,
+				  struct module *owner,
+				  const char *mod_name);
+int xenbus_probe_node(struct xen_bus_type *bus,
+		      const char *type,
+		      const char *nodename);
+int xenbus_probe_devices(struct xen_bus_type *bus);
 
-extern void xenbus_dev_changed(const char *node, struct xen_bus_type *bus);
+void xenbus_dev_changed(const char *node, struct xen_bus_type *bus);
 
-extern void xenbus_dev_shutdown(struct device *_dev);
+void xenbus_dev_shutdown(struct device *_dev);
 
-extern int xenbus_dev_suspend(struct device *dev);
-extern int xenbus_dev_resume(struct device *dev);
-extern int xenbus_dev_cancel(struct device *dev);
+int xenbus_dev_suspend(struct device *dev);
+int xenbus_dev_resume(struct device *dev);
+int xenbus_dev_cancel(struct device *dev);
 
-extern void xenbus_otherend_changed(struct xenbus_watch *watch,
-				    const char **vec, unsigned int len,
-				    int ignore_on_shutdown);
+void xenbus_otherend_changed(struct xenbus_watch *watch,
+			     const char **vec, unsigned int len,
+			     int ignore_on_shutdown);
 
-extern int xenbus_read_otherend_details(struct xenbus_device *xendev,
-					char *id_node, char *path_node);
+int xenbus_read_otherend_details(struct xenbus_device *xendev,
+				 char *id_node, char *path_node);
 
 void xenbus_ring_ops_init(void);
 
+void *xenbus_dev_request_and_reply(struct xsd_sockmsg *msg);
+
 #endif
diff --git a/drivers/xen/xenbus/xenbus_client.c b/drivers/xen/xenbus/xenbus_client.c
@@ -47,7 +47,7 @@
 #include <xen/xen.h>
 #include <xen/features.h>
 
-#include "xenbus_probe.h"
+#include "xenbus.h"
 
 #define XENBUS_PAGES(_grants)	(DIV_ROUND_UP(_grants, XEN_PFN_PER_PAGE))
 

diff --git a/drivers/xen/xenbus/xenbus_comms.c b/drivers/xen/xenbus/xenbus_comms.c
@@ -40,7 +40,7 @@
 #include <asm/xen/hypervisor.h>
 #include <xen/events.h>
 #include <xen/page.h>
-#include "xenbus_comms.h"
+#include "xenbus.h"
 
 static int xenbus_irq;
 

diff --git a/drivers/xen/xenbus/xenbus_comms.h b/drivers/xen/xenbus/xenbus_comms.h
diff --git a/drivers/xen/xenbus/xenbus_dev_backend.c b/drivers/xen/xenbus/xenbus_dev_backend.c
@@ -16,7 +16,7 @@
 #include <xen/events.h>
 #include <asm/xen/hypervisor.h>
 
-#include "xenbus_comms.h"
+#include "xenbus.h"
 
 static int xenbus_backend_open(struct inode *inode, struct file *filp)
 {

diff --git a/drivers/xen/xenbus/xenbus_dev_frontend.c b/drivers/xen/xenbus/xenbus_dev_frontend.c
@@ -57,12 +57,12 @@
 #include <linux/miscdevice.h>
 #include <linux/init.h>
 
-#include "xenbus_comms.h"
-
 #include <xen/xenbus.h>
 #include <xen/xen.h>
 #include <asm/xen/hypervisor.h>
 
+#include "xenbus.h"
+
 /*
  * An element of a list of outstanding transactions, for which we're
  * still waiting a reply.

diff --git a/drivers/xen/xenbus/xenbus_probe.c b/drivers/xen/xenbus/xenbus_probe.c
@@ -62,8 +62,7 @@
 
 #include <xen/hvm.h>
 
-#include "xenbus_comms.h"
-#include "xenbus_probe.h"
+#include "xenbus.h"
 
 
 int xen_store_evtchn;

diff --git a/drivers/xen/xenbus/xenbus_probe_backend.c b/drivers/xen/xenbus/xenbus_probe_backend.c
@@ -53,8 +53,7 @@
 #include <xen/xenbus.h>
 #include <xen/features.h>
 
-#include "xenbus_comms.h"
-#include "xenbus_probe.h"
+#include "xenbus.h"
 
 /* backend/<type>/<fe-uuid>/<id> => <type>-<fe-domid>-<id> */
 static int backend_bus_id(char bus_id[XEN_BUS_ID_SIZE], const char *nodename)

diff --git a/drivers/xen/xenbus/xenbus_probe_frontend.c b/drivers/xen/xenbus/xenbus_probe_frontend.c
@@ -27,8 +27,7 @@
 
 #include <xen/platform_pci.h>
 
-#include "xenbus_comms.h"
-#include "xenbus_probe.h"
+#include "xenbus.h"
 
 
 

diff --git a/drivers/xen/xenbus/xenbus_xs.c b/drivers/xen/xenbus/xenbus_xs.c
@@ -48,8 +48,7 @@
 #include <asm/xen/hypervisor.h>
 #include <xen/xenbus.h>
 #include <xen/xen.h>
-#include "xenbus_comms.h"
-#include "xenbus_probe.h"
+#include "xenbus.h"
 
 struct xs_stored_msg {
 	struct list_head list;

diff --git a/drivers/xen/xenfs/super.c b/drivers/xen/xenfs/super.c
@@ -16,10 +16,10 @@
 #include <linux/magic.h>
 
 #include <xen/xen.h>
+#include <xen/xenbus.h>
 
 #include "xenfs.h"
 #include "../privcmd.h"
-#include "../xenbus/xenbus_comms.h"
 
 #include <asm/xen/hypervisor.h>
 

diff --git a/drivers/xen/xenfs/xenstored.c b/drivers/xen/xenfs/xenstored.c
@@ -4,9 +4,9 @@
 #include <linux/fs.h>
 
 #include <xen/page.h>
+#include <xen/xenbus.h>
 
 #include "xenfs.h"
-#include "../xenbus/xenbus_comms.h"
 
 static ssize_t xsd_read(struct file *file, char __user *buf,
 			    size_t size, loff_t *off)

diff --git a/include/xen/xenbus.h b/include/xen/xenbus.h
@@ -38,6 +38,7 @@
 #include <linux/notifier.h>
 #include <linux/mutex.h>
 #include <linux/export.h>
+#include <linux/fs.h>
 #include <linux/completion.h>
 #include <linux/init.h>
 #include <linux/slab.h>
@@ -175,16 +176,9 @@ void xs_suspend(void);
 void xs_resume(void);
 void xs_suspend_cancel(void);
 
-/* Used by xenbus_dev to borrow kernel's store connection. */
-void *xenbus_dev_request_and_reply(struct xsd_sockmsg *msg);
-
 struct work_struct;
 
-/* Prepare for domain suspend: then resume or cancel the suspend. */
-void xenbus_suspend(void);
-void xenbus_resume(void);
 void xenbus_probe(struct work_struct *);
-void xenbus_suspend_cancel(void);
 
 #define XENBUS_IS_ERR_READ(str) ({			\
 	if (!IS_ERR(str) && strlen(str) == 0) {		\
@@ -235,4 +229,8 @@ const char *xenbus_strstate(enum xenbus_state state);
 int xenbus_dev_is_online(struct xenbus_device *dev);
 int xenbus_frontend_closed(struct xenbus_device *dev);
 
+extern const struct file_operations xen_xenbus_fops;
+extern struct xenstore_domain_interface *xen_store_interface;
+extern int xen_store_evtchn;
+
 #endif /* _XEN_XENBUS_H */