bitkeeper revision 1.1718.1.6 (42b5a5f3otSuOxDZ6KTFKrxR1U1m4Q)

Extend the xen_version hypercall to return extraversion and compile 
info.
Signed-off-by: Nguyen Anh Quynh <aquynh@gmail.com>
Signed-off-by: Keir Fraser <keir@xensource.com>

.rootkeys

@@ -1504,6 +1504,7 @@
 4051db79512nOCGweabrFWO2M2h5ng xen/include/public/physdev.h
 40589968wmhPmV5-ENbBYmMjnedgKw xen/include/public/sched_ctl.h
 404f3d2eR2Owk-ZcGOx9ULGHg3nrww xen/include/public/trace.h
+42b5a5f2QC1IxeuwCwwsOEhvcJ2BJg xen/include/public/version.h
 4266bd01Ul-pC01ZVvBkhBnv5eqzvw xen/include/public/vmx_assist.h
 3ddb79c25UE59iu4JJcbRalx95mvcg xen/include/public/xen.h
 3e397e66m2tO3s-J8Jnr7Ws_tGoPTg xen/include/xen/ac_timer.h

xen/common/kernel.c

@@ -1,10 +1,7 @@
 /******************************************************************************
  * kernel.c
  * 
- * This file should contain architecture-independent bootstrap and low-level
- * help routines. It's a bit x86/PC specific right now!
- * 
- * Copyright (c) 2002-2003 K A Fraser
+ * Copyright (c) 2002-2005 K A Fraser
  */
 
 #include <xen/config.h>
@@ -14,6 +11,7 @@
 #include <xen/compile.h>
 #include <xen/sched.h>
 #include <asm/current.h>
+#include <public/version.h>
 
 void cmdline_parse(char *cmdline)
 {
@@ -83,11 +81,38 @@ void cmdline_parse(char *cmdline)
  * Simple hypercalls.
  */
 
-long do_xen_version(int cmd)
+long do_xen_version(int cmd, void *arg)
 {
-    if ( cmd != 0 )
-        return -ENOSYS;
-    return (XEN_VERSION<<16) | (XEN_SUBVERSION);
+    switch ( cmd )
+    {
+    case XENVER_version:
+    {
+        return (XEN_VERSION<<16) | (XEN_SUBVERSION);
+    }
+
+    case XENVER_extraversion:
+    {
+        char extraversion[16];
+        safe_strcpy(extraversion, XEN_EXTRAVERSION);
+        if ( copy_to_user(arg, extraversion, sizeof(extraversion)) )
+            return -EFAULT;
+        return 0;
+    }
+
+    case XENVER_compile_info:
+    {
+        struct xen_compile_info info;
+        safe_strcpy(info.compiler,       XEN_COMPILER);
+        safe_strcpy(info.compile_by,     XEN_COMPILE_BY);
+        safe_strcpy(info.compile_domain, XEN_COMPILE_DOMAIN);
+        safe_strcpy(info.compile_date,   XEN_COMPILE_DATE);
+        if ( copy_to_user(arg, &info, sizeof(info)) )
+            return -EFAULT;
+        return 0;
+    }
+    }
+
+    return -ENOSYS;
 }
 
 long do_vm_assist(unsigned int cmd, unsigned int type)

xen/include/public/version.h

@@ -0,0 +1,30 @@
+/******************************************************************************
+ * version.h
+ * 
+ * Xen version, type, and compile information.
+ * 
+ * Copyright (c) 2005, Nguyen Anh Quynh <aquynh@gmail.com>
+ * Copyright (c) 2005, Keir Fraser <keir@xensource.com>
+ */
+
+#ifndef __XEN_PUBLIC_VERSION_H__
+#define __XEN_PUBLIC_VERSION_H__
+
+/* NB. All ops return zero on success, except XENVER_version. */
+
+/* arg == NULL; returns major:minor (16:16). */
+#define XENVER_version      0
+
+/* arg == 16-char string buffer. */
+#define XENVER_extraversion 1
+
+/* arg == xenversion_compile_info_t. */
+#define XENVER_compile_info 2
+typedef struct xen_compile_info {
+    char compiler[64];
+    char compile_by[16];
+    char compile_domain[32];
+    char compile_date[32];
+} xen_compile_info_t;
+
+#endif /* __XEN_PUBLIC_VERSION_H__ */

xen/include/xen/string.h

@@ -81,4 +81,9 @@ extern void * memchr(const void *,int,__kernel_size_t);
 }
 #endif
 
+#define safe_strcpy(d,s)                        \
+do { strncpy((d),(s),sizeof((d)));              \
+     (d)[sizeof((d))-1] = '\0';                 \
+} while (0)
+
 #endif /* _LINUX_STRING_H_ */