[OpenAFS-devel] Re: Compiling kernel module for 2.6.28.1

[Simon Wilkinson]

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On 23 Jan 2009, at 09:51, Dr A V Le Blanc wrote:

> I've tried compiling the kernel module from openafs-1.5.57 for kernel
> 2.6.28.1, and I get this error:

Unfortunately, d_alloc_anon was removed from the kernel recently, and  
replaced with the GPL only d_obtain_alias function, which OpenAFS  
cannot use. Unfortunately that, and the relicensing of a load of the  
sunrpc functions to also be GPL only, means that the Linux NFS  
translator is pretty much dead in the water.

I think the attached patch should disable this code...

S.

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Index: development/openafs/acinclude.m4
===================================================================
--- development.orig/openafs/acinclude.m4	2009-01-21 15:16:48.000000000 +0000
+++ development/openafs/acinclude.m4	2009-01-23 10:28:02.000000000 +0000
@@ -935,6 +935,10 @@
 		 LINUX_SYSCTL_TABLE_CHECKING
 		 LINUX_HAVE_IGET
 		 LINUX_HAVE_I_SIZE_READ
+		 LINUX_HAVE_D_ALLOC_ANON
+		 if test "x$ac_cv_linux_d_alloc_anon" = "xno"; then
+		   AC_DEFINE([AFS_NONFSTRANS], 1, [define to disable the nfs translator])
+		 fi
 		 LINUX_FS_STRUCT_NAMEIDATA_HAS_PATH
 	         LINUX_EXPORTS_INIT_MM
                  LINUX_EXPORTS_SYS_CHDIR
Index: development/openafs/src/afs/LINUX/osi_export.c
===================================================================
--- development.orig/openafs/src/afs/LINUX/osi_export.c	2008-10-24 22:01:40.000000000 +0100
+++ development/openafs/src/afs/LINUX/osi_export.c	2009-01-23 10:55:55.000000000 +0000
@@ -27,6 +27,8 @@
 #include "afs/afs_dynroot.h"
 #include "h/smp_lock.h"
 
+#if !defined(AFS_NONFSTRANS)
+
 /* #define OSI_EXPORT_DEBUG */
 
 extern struct dentry_operations afs_dentry_operations;
@@ -956,3 +958,5 @@
     .get_name   = afs_export_get_name,
     .get_parent = afs_export_get_parent,
 };
+
+#endif
Index: development/openafs/src/cf/linux-test4.m4
===================================================================
--- development.orig/openafs/src/cf/linux-test4.m4	2009-01-21 15:16:51.000000000 +0000
+++ development/openafs/src/cf/linux-test4.m4	2009-01-23 10:25:33.000000000 +0000
@@ -841,6 +841,22 @@
     AC_DEFINE([HAVE_LINUX_I_SIZE_READ], 1, [define if your kernel has i_size_read()])
   fi])
 
+AC_DEFUN([LINUX_HAVE_D_ALLOC_ANON], [
+  AC_MSG_CHECKING([for linux d_alloc_anon()])
+  AC_CACHE_VAL([ac_cv_linux_d_alloc_anon], [
+    save_CPPFLAGS="$CPPFLAGS"
+    CPPFLAGS="$CPPFLAGS -Werror-implicit-function-declaration"
+    AC_TRY_KBUILD(
+[#include <linux/dcache.h>],
+[d_alloc_anon(NULL);],
+      ac_cv_linux_d_alloc_anon=yes,
+      ac_cv_linux_d_alloc_anon=no)
+    CPPFLAGS="$save_CPPFLAGS"])
+  AC_MSG_RESULT($ac_cv_linux_d_alloc_anon)
+  if test "x$ac_cv_linux_d_alloc_anon" = "xyes"; then
+    AC_DEFINE([HAVE_LINUX_D_ALLOC_ANON], 1, [define if your kernel has d_alloc_anon()])
+  fi])
+
 AC_DEFUN([LINUX_FREEZER_H_EXISTS], [
   AC_MSG_CHECKING([for linux/freezer.h existance])
   AC_CACHE_VAL([ac_cv_linux_freezer_h_exists], [

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