* configure.in: checking xenstore library, error out on missing libs

* include/libxen.h src/libxen.c src/libxen_sym.version: adding new
  entry points
Daniel

ChangeLog

@@ -1,3 +1,9 @@
+Tue Nov 22 17:09:11 CET 2005 Daniel Veillard <veillard@redhat.com>
+
+	* configure.in: checking xenstore library, error out on missing libs
+	* include/libxen.h src/libxen.c src/libxen_sym.version: adding new
+	  entry points
+
 Thu Nov 10 17:11:03 CET 2005 Daniel Veillard <veillard@redhat.com>
 
 	* src/makefile.am src/libxen.c src/xensh.c: add a small tool sensh,

configure.in

@@ -48,6 +48,7 @@ test "x$U" != "x" && AC_MSG_ERROR(Compiler not ANSI compliant)
 AM_PROG_LIBTOOL
 
 dnl search for the low level Xen library
-AC_SEARCH_LIBS(xc_domain_create, [xenctrl])
+AC_SEARCH_LIBS(xc_domain_create, [xenctrl], [], [AC_MSG_ERROR([Xen control library not found])])
+AC_SEARCH_LIBS(xs_read, [xenstore], [], [AC_MSG_ERROR([Xen store library not found])])
 
 AC_OUTPUT(Makefile src/Makefile include/Makefile libxen.pc libxen.spec)

include/libxen.h

@@ -73,7 +73,8 @@ xenDomainPtr		xenCreateLinuxDomain	(xenConnectPtr conn,
 						 const char *cmdline,
 						 unsigned long memory,
 						 unsigned int flags);
-
+xenDomainPtr		xenLookupDomain		(xenConnectPtr conn,
+						 const char *name);
 int			xenDestroyDomain	(xenDomainPtr domain);
 
 /*
@@ -85,6 +86,8 @@ int			xenResumeDomain		(xenDomainPtr domain);
 /*
  * Dynamic control of domains
  */
+const char *		xenGetName		(xenDomainPtr domain);
+unsigned long		xenGetMaxMemory		(xenDomainPtr domain);
 int			xenSetMaxMemory		(xenDomainPtr domain,
 						 unsigned long memory);
 

src/libxen.c

@@ -31,6 +31,7 @@
 struct _xenConnect {
     unsigned int magic;		/* specific value to check */
     int	         handle;	/* internal handle used for hypercall */
+    int	         xshandle;	/* handle to talk to the xenstore */
 };
 
 /**
@@ -38,28 +39,37 @@ struct _xenConnect {
  * @name: optional argument currently unused, pass NULL
  *
  * This function should be called first to get a connection to the 
- * Hypervisor
+ * Hypervisor and xen store
  *
  * Returns a pointer to the hypervisor connection or NULL in case of error
  */
 xenConnectPtr
 xenOpenConnect(const char *name) {
     xenConnectPtr ret;
-    int handle;
+    int handle = -1;
+    int xshandle = -1;
 
     handle = xc_interface_open();
-    if (handle == -1) {
-        return(NULL);
-    }
+    if (handle == -1)
+        goto failed;
+    xshandle = xs_daemon_open();
+    if (xshandle < 0)
+        goto failed;
+
     ret = (xenConnectPtr) malloc(sizeof(xenConnect));
-    if (ret == NULL) {
-        xc_interface_close(handle);
-        return(NULL);
-    }
+    if (ret == NULL)
+        goto failed;
     ret->magic = XEN_CONNECT_MAGIC;
     ret->handle = handle;
+    ret->xshandle = xshandle;
 
     return(ret);
+failed:
+    if (handle >= 0)
+        xc_interface_close(handle);
+    if (xshandle >= 0)
+        xs_daemon_close(xshandle);
+    return(NULL);
 }
 
 /**
@@ -79,6 +89,8 @@ xenCloseConnect(xenConnectPtr conn) {
         return(-1);
 
     conn->magic = -1;
+    xs_daemon_close(conn->xshandle);
+    conn->xshandle = -1;
     xc_interface_close(conn->handle);
     conn->handle = -1;
     free(conn);
@@ -122,6 +134,23 @@ xenCreateLinuxDomain(xenConnectPtr conn, const char *kernel_path,
     return(NULL);
 }
 
+/**
+ * xenLookupDomain:
+ * @conn: pointer to the hypervisor connection
+ * @name: name for the domain
+ *
+ * Try to lookup a domain on the given hypervisor
+ *
+ * Returns a new domain object or NULL in case of failure
+ */
+xenDomainPtr
+xenLookupDomain(xenConnectPtr conn, const char *name) {
+    if ((conn == NULL) || (name == NULL))
+        return(NULL);
+    TODO
+    return(NULL);
+}
+
 /**
  * xenDestroyDomain:
  * @domain: a domain object
@@ -175,6 +204,41 @@ xenResumeDomain(xenDomainPtr domain) {
     return(-1);
 }
 
+/**
+ * xenGetName:
+ * @domain: a domain object
+ *
+ * Get the public name for that domain
+ *
+ * Returns a pointer to the name or NULL, the string need not be deallocated
+ * its lifetime will be the same as the domain object.
+ */
+const char *
+xenGetName(xenDomainPtr domain) {
+    if (domain == NULL)
+        return(NULL);
+    TODO
+    return(NULL);
+}
+
+/**
+ * xenGetMaxMemory:
+ * @domain: a domain object or NULL
+ * 
+ * Retrieve the maximum amount of physical memory allocated to a
+ * domain. If domain is NULL, then this get the amount of memory reserved
+ * to Domain0 i.e. the domain where the application runs.
+ *
+ * Returns the memory size in kilobytes or 0 in case of error.
+ */
+unsigned long
+xenGetMaxMemory(xenDomainPtr domain) {
+    if (domain == NULL)
+        return(0);
+    TODO
+    return(0);
+}
+
 /**
  * xenSetMaxMemory:
  * @domain: a domain object or NULL

src/libxen_sym.version

@@ -4,9 +4,12 @@
 	xenCloseConnect;
 	xenGetVersion;
 	xenCreateLinuxDomain;
+	xenLookupDomain;
 	xenDestroyDomain;
 	xenSuspendDomain;
 	xenResumeDomain;
+	xenGetName;
+	xenGetMaxMemory;
 	xenSetMaxMemory;
     local: *;
 };