Whamcloud - gitweb
LU-5014 osd-ldiskfs: vfs_unlink api changed
[fs/lustre-release.git] / lustre / autoconf / lustre-core.m4
index 44c72d9..8e471bb 100644 (file)
@@ -3,10 +3,10 @@
 #
 # Wrapper for AC_CONFIG_SUBDIR
 #
-AC_DEFUN([LC_CONFIG_SRCDIR],
-[AC_CONFIG_SRCDIR([lustre/obdclass/obdo.c])
-libcfs_is_module=yes
-ldiskfs_is_ext4=yes
+AC_DEFUN([LC_CONFIG_SRCDIR], [
+AC_CONFIG_SRCDIR([lustre/obdclass/obdo.c])
+libcfs_is_module="yes"
+ldiskfs_is_ext4="yes"
 ])
 
 #
@@ -14,13 +14,13 @@ ldiskfs_is_ext4=yes
 #
 # lustre specific paths
 #
-AC_DEFUN([LC_PATH_DEFAULTS],
-[# ptlrpc kernel build requires this
+AC_DEFUN([LC_PATH_DEFAULTS], [
+# ptlrpc kernel build requires this
 LUSTRE="$PWD/lustre"
 AC_SUBST(LUSTRE)
 
 # mount.lustre
-rootsbindir='/sbin'
+rootsbindir='$(CROSS_PATH)/sbin'
 AC_SUBST(rootsbindir)
 
 demodir='$(docdir)/demo'
@@ -28,15 +28,15 @@ AC_SUBST(demodir)
 
 pkgexampledir='${pkgdatadir}/examples'
 AC_SUBST(pkgexampledir)
-])
+]) # LC_PATH_DEFAULTS
 
 #
 # LC_TARGET_SUPPORTED
 #
 # is the target os supported?
 #
-AC_DEFUN([LC_TARGET_SUPPORTED],
-[case $target_os in
+AC_DEFUN([LC_TARGET_SUPPORTED], [
+case $target_os in
        linux* | darwin*)
 $1
                ;;
@@ -44,43 +44,53 @@ $1
 $2
                ;;
 esac
-])
+]) # LC_TARGET_SUPPORTED
 
 #
 # LC_CONFIG_OBD_BUFFER_SIZE
 #
 # the maximum buffer size of lctl ioctls
 #
-AC_DEFUN([LC_CONFIG_OBD_BUFFER_SIZE],
-[AC_MSG_CHECKING([maximum OBD ioctl size])
+AC_DEFUN([LC_CONFIG_OBD_BUFFER_SIZE], [
+AC_MSG_CHECKING([for maximum OBD ioctl size])
 AC_ARG_WITH([obd-buffer-size],
        AC_HELP_STRING([--with-obd-buffer-size=[size]],
-                       [set lctl ioctl maximum bytes (default=8192)]),
-       [
-               OBD_BUFFER_SIZE=$with_obd_buffer_size
-       ],[
-               OBD_BUFFER_SIZE=8192
-       ])
+               [set lctl ioctl maximum bytes (default=8192)]),
+       [OBD_BUFFER_SIZE=$with_obd_buffer_size],
+       [OBD_BUFFER_SIZE=8192])
 AC_MSG_RESULT([$OBD_BUFFER_SIZE bytes])
-AC_DEFINE_UNQUOTED(OBD_MAX_IOCTL_BUFFER, $OBD_BUFFER_SIZE, [IOCTL Buffer Size])
-])
+AC_DEFINE_UNQUOTED(CONFIG_LUSTRE_OBD_MAX_IOCTL_BUFFER, $OBD_BUFFER_SIZE,
+       [IOCTL Buffer Size])
+]) # LC_CONFIG_OBD_BUFFER_SIZE
 
 #
 # LC_READLINK_SSIZE_T
 #
-AC_DEFUN([LC_READLINK_SSIZE_T],
-[AC_MSG_CHECKING([if readlink returns ssize_t])
+AC_DEFUN([LC_READLINK_SSIZE_T], [
+AC_CACHE_CHECK([if readlink returns ssize_t],
+lb_cv_compile_readlink_ssize_t, [
 AC_TRY_COMPILE([
        #include <unistd.h>
-],[
+], [
        ssize_t readlink(const char *, char *, size_t);
-],[
-       AC_MSG_RESULT([yes])
-       AC_DEFINE(HAVE_POSIX_1003_READLINK, 1, [readlink returns ssize_t])
-],[
-       AC_MSG_RESULT([no])
-])
+],
+       [lb_cv_compile_readlink_ssize_t="yes"],
+       [lb_cv_compile_readlink_ssize_t="no"])
 ])
+AS_IF([test "x$lb_cv_compile_readlink_ssize_t" = xyes],
+       [AC_DEFINE(HAVE_POSIX_1003_READLINK, 1,
+               [readlink returns ssize_t])])
+]) # LC_READLINK_SSIZE_T
+
+#
+# LC_GLIBC_SUPPORT_FHANDLES
+#
+AC_DEFUN([LC_GLIBC_SUPPORT_FHANDLES], [
+AC_CHECK_FUNCS([name_to_handle_at],
+       [AC_DEFINE(HAVE_FHANDLE_GLIBC_SUPPORT, 1,
+               [file handle and related syscalls are supported])],
+       [AC_MSG_WARN([file handle and related syscalls are not supported])])
+]) # LC_GLIBC_SUPPORT_FHANDLES
 
 #
 # LC_FUNC_DEV_SET_RDONLY
@@ -88,288 +98,166 @@ AC_TRY_COMPILE([
 # check whether dev_set_rdonly is exported.  This is needed until we
 # have another mechanism to fence IO from the underlying device.
 #
-AC_DEFUN([LC_FUNC_DEV_SET_RDONLY],
-[LB_CHECK_SYMBOL_EXPORT([dev_set_rdonly],
-[block/ll_rw_block.c,block/blk-core.c],[
-        AC_DEFINE(HAVE_DEV_SET_RDONLY, 1, [kernel exports dev_set_rdonly])
-],[
-        AC_MSG_WARN([kernel missing dev_set_rdonly patch for testing])
-])
-])
+AC_DEFUN([LC_FUNC_DEV_SET_RDONLY], [
+LB_CHECK_EXPORT([dev_set_rdonly], [block/ll_rw_block.c block/blk-core.c],
+       [AC_DEFINE(HAVE_DEV_SET_RDONLY, 1,
+               [kernel exports dev_set_rdonly])],
+       [AC_MSG_WARN([kernel missing dev_set_rdonly patch for testing])])
+]) # LC_FUNC_DEV_SET_RDONLY
 
 #
+# LC_STACK_SIZE
+#
 # Ensure stack size big than 8k in Lustre server (all kernels)
 #
-AC_DEFUN([LC_STACK_SIZE],
-[AC_MSG_CHECKING([stack size big than 8k])
-LB_LINUX_TRY_COMPILE([
+AC_DEFUN([LC_STACK_SIZE], [
+LB_CHECK_COMPILE([if stack size big than 8k],
+stack_size_8k, [
        #include <linux/thread_info.h>
-],[
-        #if THREAD_SIZE < 8192
-        #error "stack size < 8192"
-        #endif
-],[
-        AC_MSG_RESULT(yes)
-],[
-        AC_MSG_ERROR([Lustre requires that Linux is configured with at least a 8KB stack.])
-])
-])
+], [
+       #if THREAD_SIZE < 8192
+       #error "stack size < 8192"
+       #endif
+], [], [AC_MSG_ERROR([
 
+Lustre requires that Linux is configured with at least a 8KB stack.
+])])
+]) # LC_STACK_SIZE
+
+#
+# LC_MDS_MAX_THREADS
 #
 # Allow the user to set the MDS thread upper limit
 #
-AC_DEFUN([LC_MDS_MAX_THREADS],
-[
-        AC_ARG_WITH([mds_max_threads],
-        AC_HELP_STRING([--with-mds-max-threads=size],
-                        [define the maximum number of threads available on the MDS: (default=512)]),
-        [
-                MDS_THREAD_COUNT=$with_mds_max_threads
-                AC_DEFINE_UNQUOTED(MDT_MAX_THREADS, $MDS_THREAD_COUNT, [maximum number of mdt threads])
-        ])
-])
+AC_DEFUN([LC_MDS_MAX_THREADS], [
+AC_MSG_CHECKING([for maximum number of MDS threads])
+AC_ARG_WITH([mds_max_threads],
+       AC_HELP_STRING([--with-mds-max-threads=count],
+               [maximum threads available on the MDS: (default=512)]),
+       [AC_DEFINE_UNQUOTED(MDS_MAX_THREADS, $with_mds_max_threads,
+               [maximum number of MDS threads])])
+AC_MSG_RESULT([$with_mds_max_threads])
+]) # LC_MDS_MAX_THREADS
 
 #
 # LC_CONFIG_PINGER
 #
 # the pinger is temporary, until we have the recovery node in place
 #
-AC_DEFUN([LC_CONFIG_PINGER],
-[AC_MSG_CHECKING([whether to enable pinger support])
+AC_DEFUN([LC_CONFIG_PINGER], [
+AC_MSG_CHECKING([whether to enable Lustre pinger support])
 AC_ARG_ENABLE([pinger],
        AC_HELP_STRING([--disable-pinger],
-                       [disable recovery pinger support]),
-       [],[enable_pinger='yes'])
+               [disable recovery pinger support]),
+       [], [enable_pinger="yes"])
 AC_MSG_RESULT([$enable_pinger])
-if test x$enable_pinger != xno ; then
-  AC_DEFINE(ENABLE_PINGER, 1, Use the Pinger)
-fi
-])
+AS_IF([test "x$enable_pinger" != xno],
+       [AC_DEFINE(ENABLE_PINGER, 1,[Use the Pinger])])
+]) # LC_CONFIG_PINGER
 
 #
 # LC_CONFIG_CHECKSUM
 #
 # do checksum of bulk data between client and OST
 #
-AC_DEFUN([LC_CONFIG_CHECKSUM],
-[AC_MSG_CHECKING([whether to enable data checksum support])
+AC_DEFUN([LC_CONFIG_CHECKSUM], [
+AC_MSG_CHECKING([whether to enable data checksum support])
 AC_ARG_ENABLE([checksum],
-       AC_HELP_STRING([--disable-checksum],
-                       [disable data checksum support]),
-       [],[enable_checksum='yes'])
+       AC_HELP_STRING([--disable-checksum],
+               [disable data checksum support]),
+       [], [enable_checksum="yes"])
 AC_MSG_RESULT([$enable_checksum])
-if test x$enable_checksum != xno ; then
-  AC_DEFINE(ENABLE_CHECKSUM, 1, do data checksums)
-fi
-])
+AS_IF([test "x$enable_checksum" != xno],
+       [AC_DEFINE(ENABLE_CHECKSUM, 1, [do data checksums])])
+]) # LC_CONFIG_CHECKSUM
 
 #
 # LC_CONFIG_LIBLUSTRE_RECOVERY
 #
-AC_DEFUN([LC_CONFIG_LIBLUSTRE_RECOVERY],
-[AC_MSG_CHECKING([whether to enable liblustre recovery support])
+AC_DEFUN([LC_CONFIG_LIBLUSTRE_RECOVERY], [
+AC_MSG_CHECKING([whether to enable liblustre recovery support])
 AC_ARG_ENABLE([liblustre-recovery],
        AC_HELP_STRING([--disable-liblustre-recovery],
-                       [disable liblustre recovery support]),
-       [],[enable_liblustre_recovery='yes'])
+               [disable liblustre recovery support]),
+       [], [enable_liblustre_recovery="yes"])
 AC_MSG_RESULT([$enable_liblustre_recovery])
-if test x$enable_liblustre_recovery != xno ; then
-  AC_DEFINE(ENABLE_LIBLUSTRE_RECOVERY, 1, Liblustre Can Recover)
-fi
-])
+AS_IF([test "x$enable_liblustre_recovery" != xno],
+       [AC_DEFINE(ENABLE_LIBLUSTRE_RECOVERY, 1, [Liblustre Can Recover])])
+]) # LC_CONFIG_LIBLUSTRE_RECOVERY
 
 #
 # LC_CONFIG_HEALTH_CHECK_WRITE
 #
 # Turn off the actual write to the disk
 #
-AC_DEFUN([LC_CONFIG_HEALTH_CHECK_WRITE],
-[AC_MSG_CHECKING([whether to enable a write with the health check])
+AC_DEFUN([LC_CONFIG_HEALTH_CHECK_WRITE], [
+AC_MSG_CHECKING([whether to enable a write with the health check])
 AC_ARG_ENABLE([health_write],
-        AC_HELP_STRING([--enable-health_write],
-                        [enable disk writes when doing health check]),
-        [],[enable_health_write='no'])
+       AC_HELP_STRING([--enable-health_write],
+               [enable disk writes when doing health check]),
+       [], [enable_health_write="no"])
 AC_MSG_RESULT([$enable_health_write])
-if test x$enable_health_write != xno ; then
-  AC_DEFINE(USE_HEALTH_CHECK_WRITE, 1, Write when Checking Health)
-fi
-])
+AS_IF([test "x$enable_health_write" != xno],
+       [AC_DEFINE(USE_HEALTH_CHECK_WRITE, 1, [Write when Checking Health])])
+]) # LC_CONFIG_HEALTH_CHECK_WRITE
 
-AC_DEFUN([LC_CONFIG_LRU_RESIZE],
-[AC_MSG_CHECKING([whether to enable lru self-adjusting])
+#
+# LC_CONFIG_LRU_RESIZE
+#
+AC_DEFUN([LC_CONFIG_LRU_RESIZE], [
+AC_MSG_CHECKING([whether to enable lru self-adjusting])
 AC_ARG_ENABLE([lru_resize],
        AC_HELP_STRING([--enable-lru-resize],
-                       [enable lru resize support]),
-       [],[enable_lru_resize='yes'])
+               [enable lru resize support]),
+       [], [enable_lru_resize="yes"])
 AC_MSG_RESULT([$enable_lru_resize])
-if test x$enable_lru_resize != xno; then
-   AC_DEFINE(HAVE_LRU_RESIZE_SUPPORT, 1, [Enable lru resize support])
-fi
-])
+AS_IF([test "x$enable_lru_resize" != xno],
+       [AC_DEFINE(HAVE_LRU_RESIZE_SUPPORT, 1, [Enable lru resize support])])
+]) # LC_CONFIG_LRU_RESIZE
 
 #
+# LC_QUOTA_CONFIG
+#
 # Quota support. The kernel must support CONFIG_QUOTA.
 #
-AC_DEFUN([LC_QUOTA_CONFIG],
-[LB_LINUX_CONFIG_IM([QUOTA],[],[
-        AC_MSG_ERROR([Lustre quota requires that CONFIG_QUOTA is enabled in your kernel.])
-       ])
-])
-
-# truncate_complete_page() was exported from RHEL5/SLES10, but not in SLES11 SP0 (2.6.27)
-# remove_from_page_cache() was exported between 2.6.35 and 2.6.38
-# delete_from_page_cache() is exported from 2.6.39
-AC_DEFUN([LC_EXPORT_TRUNCATE_COMPLETE],
-         [LB_CHECK_SYMBOL_EXPORT([truncate_complete_page],
-                                 [mm/truncate.c],
-                                 [AC_DEFINE(HAVE_TRUNCATE_COMPLETE_PAGE, 1,
-                                            [kernel export truncate_complete_page])])
-          LB_CHECK_SYMBOL_EXPORT([remove_from_page_cache],
-                                 [mm/filemap.c],
-                                 [AC_DEFINE(HAVE_REMOVE_FROM_PAGE_CACHE, 1,
-                                            [kernel export remove_from_page_cache])])
-          LB_CHECK_SYMBOL_EXPORT([delete_from_page_cache],
-                                 [mm/filemap.c],
-                                 [AC_DEFINE(HAVE_DELETE_FROM_PAGE_CACHE, 1,
-                                            [kernel export delete_from_page_cache])])
-         ])
-
-AC_DEFUN([LC_EXPORT_D_REHASH_COND],
-[LB_CHECK_SYMBOL_EXPORT([d_rehash_cond],
-[fs/dcache.c],[
-AC_DEFINE(HAVE_D_REHASH_COND, 1,
-            [d_rehash_cond is exported by the kernel])
-],[
-])
-])
-
-AC_DEFUN([LC_EXPORT___D_REHASH],
-[LB_CHECK_SYMBOL_EXPORT([__d_rehash],
-[fs/dcache.c],[
-AC_DEFINE(HAVE___D_REHASH, 1,
-            [__d_rehash is exported by the kernel])
-],[
-])
-])
+AC_DEFUN([LC_QUOTA_CONFIG], [
+LB_CHECK_CONFIG_IM([QUOTA], [],
+       [AC_MSG_ERROR([
 
-# The actual symbol exported varies among architectures, so we need
-# to check many symbols (but only in the current architecture.)  No
-# matter what symbol is exported, the kernel #defines node_to_cpumask
-# to the appropriate function and that's what we use.
-AC_DEFUN([LC_EXPORT_NODE_TO_CPUMASK],
-         [LB_CHECK_SYMBOL_EXPORT([node_to_cpumask],
-                                 [arch/$LINUX_ARCH/mm/numa.c],
-                                 [AC_DEFINE(HAVE_NODE_TO_CPUMASK, 1,
-                                            [node_to_cpumask is exported by
-                                             the kernel])]) # x86_64
-          LB_CHECK_SYMBOL_EXPORT([node_to_cpu_mask],
-                                 [arch/$LINUX_ARCH/kernel/smpboot.c],
-                                 [AC_DEFINE(HAVE_NODE_TO_CPUMASK, 1,
-                                            [node_to_cpumask is exported by
-                                             the kernel])]) # ia64
-          LB_CHECK_SYMBOL_EXPORT([node_2_cpu_mask],
-                                 [arch/$LINUX_ARCH/kernel/smpboot.c],
-                                 [AC_DEFINE(HAVE_NODE_TO_CPUMASK, 1,
-                                            [node_to_cpumask is exported by
-                                             the kernel])]) # i386
-          ])
-
-#
-#
-# between 2.6.5 - 2.6.22 filemap_populate is exported in some kernels
-#
-AC_DEFUN([LC_FILEMAP_POPULATE],
-[AC_MSG_CHECKING([for exported filemap_populate])
-LB_LINUX_TRY_COMPILE([
-        #include <asm/page.h>
-        #include <linux/mm.h>
-],[
-       filemap_populate(NULL, 0, 0, __pgprot(0), 0, 0);
-],[
-        AC_MSG_RESULT([yes])
-        AC_DEFINE(HAVE_FILEMAP_POPULATE, 1, [Kernel exports filemap_populate])
-],[
-        AC_MSG_RESULT([no])
-])
-])
+Lustre quota requires that CONFIG_QUOTA is enabled in your kernel.
+])])
+]) # LC_QUOTA_CONFIG
 
 #
-# added in 2.6.17
-#
-AC_DEFUN([LC_BIT_SPINLOCK_H],
-[LB_CHECK_FILE([$LINUX/include/linux/bit_spinlock.h],[
-       AC_MSG_CHECKING([if bit_spinlock.h can be compiled])
-       LB_LINUX_TRY_COMPILE([
-               #include <asm/processor.h>
-               #include <linux/spinlock.h>
-               #include <linux/bit_spinlock.h>
-       ],[],[
-               AC_MSG_RESULT([yes])
-               AC_DEFINE(HAVE_BIT_SPINLOCK_H, 1, [Kernel has bit_spinlock.h])
-       ],[
-               AC_MSG_RESULT([no])
-       ])
-],
-[])
-])
-
+# LC_EXPORT_TRUNCATE_COMPLETE_PAGE
 #
-# LC_CONST_ACL_SIZE
+# truncate_complete_page() has never been exported from an upstream kernel
+# remove_from_page_cache() was exported between 2.6.35 and 2.6.38
+# delete_from_page_cache() is exported from 2.6.39
 #
-AC_DEFUN([LC_CONST_ACL_SIZE],
-[AC_MSG_CHECKING([calc acl size])
-tmp_flags="$CFLAGS"
-CFLAGS="$CFLAGS -I$LINUX/include -I$LINUX_OBJ/include -I$LINUX_OBJ/include2 -I$LINUX/arch/`echo $target_cpu|sed -e 's/powerpc64/powerpc/' -e 's/x86_64/x86/' -e 's/i.86/x86/'`/include -include $AUTOCONF_HDIR/autoconf.h $EXTRA_KCFLAGS"
-AC_TRY_RUN([
-        #define __KERNEL__
-        #include <linux/types.h>
-        #undef __KERNEL__
-        // block include
-        #define __LINUX_POSIX_ACL_H
-
-        #ifdef CONFIG_FS_POSIX_ACL
-        # include <linux/posix_acl_xattr.h>
-        #endif
-
-        #include <stdio.h>
-
-        int main(void)
-        {
-                /* LUSTRE_POSIX_ACL_MAX_ENTRIES  = 32 */
-            int size = posix_acl_xattr_size(32);
-            FILE *f = fopen("acl.size","w+");
-            fprintf(f,"%d", size);
-            fclose(f);
-
-            return 0;
-        }
-],[
-       acl_size=`cat acl.size`
-       AC_MSG_RESULT([ACL size $acl_size])
-        AC_DEFINE_UNQUOTED(XATTR_ACL_SIZE, AS_TR_SH([$acl_size]), [size of xattr acl])
-],[
-        AC_ERROR([ACL size can't be computed])
-],[
-       AC_MSG_RESULT([can't check ACL size, make it 260])
-        AC_DEFINE_UNQUOTED(XATTR_ACL_SIZE,260)
-])
-CFLAGS="$tmp_flags"
-])
+AC_DEFUN([LC_EXPORT_TRUNCATE_COMPLETE_PAGE], [
+LB_CHECK_EXPORT([truncate_complete_page], [mm/truncate.c],
+       [AC_DEFINE(HAVE_TRUNCATE_COMPLETE_PAGE, 1,
+               [kernel export truncate_complete_page])])
+LB_CHECK_EXPORT([remove_from_page_cache], [mm/filemap.c],
+       [AC_DEFINE(HAVE_REMOVE_FROM_PAGE_CACHE, 1,
+               [kernel export remove_from_page_cache])])
+LB_CHECK_EXPORT([delete_from_page_cache], [mm/filemap.c],
+       [AC_DEFINE(HAVE_DELETE_FROM_PAGE_CACHE, 1,
+               [kernel export delete_from_page_cache])])
+]) # LC_EXPORT_TRUNCATE_COMPLETE_PAGE
 
 #
 # LC_CAPA_CRYPTO
 #
-AC_DEFUN([LC_CAPA_CRYPTO],
-[LB_LINUX_CONFIG_IM([CRYPTO],[],[
-       AC_MSG_ERROR([Lustre capability require that CONFIG_CRYPTO is enabled in your kernel.])
-])
-LB_LINUX_CONFIG_IM([CRYPTO_HMAC],[],[
-       AC_MSG_ERROR([Lustre capability require that CONFIG_CRYPTO_HMAC is enabled in your kernel.])
-])
-LB_LINUX_CONFIG_IM([CRYPTO_SHA1],[],[
-       AC_MSG_ERROR([Lustre capability require that CONFIG_CRYPTO_SHA1 is enabled in your kernel.])
-])
-])
+AC_DEFUN([LC_CAPA_CRYPTO], [
+LB_CHECK_CONFIG_IM([CRYPTO], [],
+       [AC_MSG_ERROR([Lustre capability require that CONFIG_CRYPTO is enabled in your kernel.])])
+LB_CHECK_CONFIG_IM([CRYPTO_HMAC], [],
+       [AC_MSG_ERROR([Lustre capability require that CONFIG_CRYPTO_HMAC is enabled in your kernel.])])
+LB_CHECK_CONFIG_IM([CRYPTO_SHA1], [],
+       [AC_MSG_ERROR([Lustre capability require that CONFIG_CRYPTO_SHA1 is enabled in your kernel.])])
+]) # LC_CAPA_CRYPTO
 
 #
 # LC_CONFIG_RMTCLIENT
@@ -377,2046 +265,1427 @@ LB_LINUX_CONFIG_IM([CRYPTO_SHA1],[],[
 dnl FIXME
 dnl the AES symbol usually tied with arch, e.g. CRYPTO_AES_586
 dnl FIXME
-AC_DEFUN([LC_CONFIG_RMTCLIENT],
-[LB_LINUX_CONFIG_IM([CRYPTO_AES],[],[
-        AC_MSG_WARN([Lustre remote client require that CONFIG_CRYPTO_AES is enabled in your kernel.])
+AC_DEFUN([LC_CONFIG_RMTCLIENT], [
+LB_CHECK_CONFIG_IM([CRYPTO_AES], [],
+       [AC_MSG_WARN([
+
+Lustre remote client require that CONFIG_CRYPTO_AES is enabled in your kernel.
+])])
+]) # LC_CONFIG_RMTCLIENT
+
+#
+# LC_CONFIG_GSS_KEYRING
+#
+# default 'auto', tests for dependencies, if found, enables;
+# only called if gss is enabled
+#
+AC_DEFUN([LC_CONFIG_GSS_KEYRING], [
+AC_MSG_CHECKING([whether to enable gss keyring backend])
+AC_ARG_ENABLE([gss_keyring],
+       [AC_HELP_STRING([--disable-gss-keyring],
+               [disable gss keyring backend])],
+       [], [enable_gss_keyring="auto"])
+AC_MSG_RESULT([$enable_gss_keyring])
+AS_IF([test "x$enable_gss_keyring" != xno], [
+       LB_CHECK_CONFIG_IM([KEYS], [], [
+               gss_keyring_conf_test="fail"
+               AC_MSG_WARN([
+
+GSS keyring backend require that CONFIG_KEYS be enabled in your kernel.
+])])
+
+       AC_CHECK_LIB([keyutils], [keyctl_search], [], [
+               gss_keyring_conf_test="fail"
+               AC_MSG_WARN([
+
+libkeyutils is not found, which is required by gss keyring backend
+])])
+
+       AS_IF([test "x$gss_keyring_conf_test" != xfail], [
+               AC_DEFINE([HAVE_GSS_KEYRING], [1],
+                       [Define this if you enable gss keyring backend])
+               enable_gss_keyring="yes"
+       ], [
+               AS_IF([test "x$enable_gss_keyring" = xyes], [
+                       AC_MSG_ERROR([
+
+Cannot enable gss_keyring. See above for details.
 ])
+               ], [
+                       AC_MSG_WARN([
+
+Cannot enable gss keyring. See above for details.
+])
+               ])
+       ])
 ])
+]) # LC_CONFIG_GSS_KEYRING
 
 #
-# LC_CONFIG_GSS_KEYRING (default enabled, if gss is enabled)
+# LC_CONFIG_SUNRPC
 #
-AC_DEFUN([LC_CONFIG_GSS_KEYRING],
-[AC_MSG_CHECKING([whether to enable gss keyring backend])
- AC_ARG_ENABLE([gss_keyring],
-               [AC_HELP_STRING([--disable-gss-keyring],
-                               [disable gss keyring backend])],
-               [],[enable_gss_keyring='yes'])
- AC_MSG_RESULT([$enable_gss_keyring])
-
- if test x$enable_gss_keyring != xno; then
-        LB_LINUX_CONFIG_IM([KEYS],[],
-                           [AC_MSG_ERROR([GSS keyring backend require that CONFIG_KEYS be enabled in your kernel.])])
+AC_DEFUN([LC_CONFIG_SUNRPC], [
+LB_CHECK_CONFIG_IM([SUNRPC], [], [
+       AS_IF([test "x$sunrpc_required" = xyes], [
+               AC_MSG_ERROR([
 
-        AC_CHECK_LIB([keyutils], [keyctl_search], [],
-                     [AC_MSG_ERROR([libkeyutils is not found, which is required by gss keyring backend])],)
-
-        AC_DEFINE([HAVE_GSS_KEYRING], [1],
-                  [Define this if you enable gss keyring backend])
- fi
-])
-
-AC_DEFUN([LC_CONFIG_SUNRPC],
-[LB_LINUX_CONFIG_IM([SUNRPC],[],
-                    [AC_MSG_ERROR([kernel SUNRPC support is required by using GSS.])])
+kernel SUNRPC support is required by using GSS.
 ])
+       ])])
+]) # LC_CONFIG_SUNRPC
 
 #
-# LC_CONFIG_GSS (default disabled)
+# LC_CONFIG_GSS (default 'auto' (tests for dependencies, if found, enables))
 #
 # Build gss and related tools of Lustre. Currently both kernel and user space
 # parts are depend on linux platform.
 #
-AC_DEFUN([LC_CONFIG_GSS],
-[AC_MSG_CHECKING([whether to enable gss/krb5 support])
- AC_ARG_ENABLE([gss],
-               [AC_HELP_STRING([--enable-gss], [enable gss/krb5 support])],
-               [],[enable_gss='no'])
- AC_MSG_RESULT([$enable_gss])
-
- if test x$enable_gss == xyes; then
-        LC_CONFIG_GSS_KEYRING
-        LC_CONFIG_SUNRPC
-
-        AC_DEFINE([HAVE_GSS], [1], [Define this if you enable gss])
-
-        LB_LINUX_CONFIG_IM([CRYPTO_MD5],[],
-                           [AC_MSG_WARN([kernel MD5 support is recommended by using GSS.])])
-        LB_LINUX_CONFIG_IM([CRYPTO_SHA1],[],
-                           [AC_MSG_WARN([kernel SHA1 support is recommended by using GSS.])])
-        LB_LINUX_CONFIG_IM([CRYPTO_SHA256],[],
-                           [AC_MSG_WARN([kernel SHA256 support is recommended by using GSS.])])
-        LB_LINUX_CONFIG_IM([CRYPTO_SHA512],[],
-                           [AC_MSG_WARN([kernel SHA512 support is recommended by using GSS.])])
-
-        AC_CHECK_LIB([gssapi], [gss_init_sec_context],
-                     [GSSAPI_LIBS="$GSSAPI_LDFLAGS -lgssapi"],
-                     [AC_CHECK_LIB([gssglue], [gss_init_sec_context],
-                                   [GSSAPI_LIBS="$GSSAPI_LDFLAGS -lgssglue"],
-                                   [AC_MSG_ERROR([libgssapi or libgssglue is not found, which is required by GSS.])])],)
-
-        AC_SUBST(GSSAPI_LIBS)
-
-        AC_KERBEROS_V5
- fi
-])
+AC_DEFUN([LC_CONFIG_GSS], [
+AC_MSG_CHECKING([whether to enable gss/krb5 support])
+AC_ARG_ENABLE([gss],
+       [AC_HELP_STRING([--enable-gss], [enable gss/krb5 support])],
+       [], [enable_gss="auto"])
+AC_MSG_RESULT([$enable_gss])
+
+AS_IF([test "x$enable_gss" != xno], [
+       LC_CONFIG_GSS_KEYRING
+       sunrpc_required=$enable_gss
+       LC_CONFIG_SUNRPC
+       sunrpc_required="no"
+
+       LB_CHECK_CONFIG_IM([CRYPTO_MD5], [],
+               [AC_MSG_WARN([kernel MD5 support is recommended by using GSS.])])
+       LB_CHECK_CONFIG_IM([CRYPTO_SHA1], [],
+               [AC_MSG_WARN([kernel SHA1 support is recommended by using GSS.])])
+       LB_CHECK_CONFIG_IM([CRYPTO_SHA256], [],
+               [AC_MSG_WARN([kernel SHA256 support is recommended by using GSS.])])
+       LB_CHECK_CONFIG_IM([CRYPTO_SHA512], [],
+               [AC_MSG_WARN([kernel SHA512 support is recommended by using GSS.])])
+
+       require_krb5=$enable_gss
+       AC_KERBEROS_V5
+       require_krb5="no"
+
+       AS_IF([test -n "$KRBDIR"], [
+               AC_CHECK_LIB([gssapi], [gss_export_lucid_sec_context], [
+                       GSSAPI_LIBS="$GSSAPI_LDFLAGS -lgssapi"
+                       gss_conf_test="success"
+               ], [
+                       AC_CHECK_LIB([gssglue], [gss_export_lucid_sec_context], [
+                               GSSAPI_LIBS="$GSSAPI_LDFLAGS -lgssglue"
+                               gss_conf_test="success"
+                       ], [
+                               AS_IF([test "x$enable_gss" = xyes], [
+                                       AC_MSG_ERROR([
+
+libgssapi or libgssglue is not found, which is required by GSS.
+])
+                               ], [
+                                       AC_MSG_WARN([
+
+libgssapi or libgssglue is not found, which is required by GSS.
+])
+                               ])
+                       ])
+               ])
+               AC_SUBST(GSSAPI_LIBS)
+       ])
 
-AC_DEFUN([LC_TASK_CLENV_STORE],
-[
-        AC_MSG_CHECKING([if we can store cl_env in task_struct])
-        if test x$have_task_clenv_store != xyes ; then
-                LC_TASK_CLENV_TUX_INFO
-        fi
+       AS_IF([test "x$gss_conf_test" = xsuccess], [
+               AC_DEFINE([HAVE_GSS], [1], [Define this is if you enable gss])
+               enable_gss="yes"
+       ])
 ])
+]) # LC_CONFIG_GSS
 
-# 2.6.12
+#
+# LC_INODE_PERMISION_2ARGS
+#
+# up to v2.6.27 had a 3 arg version (inode, mask, nameidata)
+# v2.6.27->v2.6.37 had a 2 arg version (inode, mask)
+# v2.6.37->v3.0 had a 3 arg version (inode, mask, nameidata)
+# v3.1 onward have a 2 arg version (inode, mask)
+#
+AC_DEFUN([LC_INODE_PERMISION_2ARGS], [
+LB_CHECK_COMPILE([if 'inode_operations->permission' has two args],
+inode_ops_permission_2args, [
+       #include <linux/fs.h>
+],[
+       struct inode *inode __attribute__ ((unused));
 
-# ~2.6.12 merge patch from oracle to convert tree_lock from spinlock to rwlock
-# yet tree_lock is converted from rwlock to spin_lock since v2.6.26
-AC_DEFUN([LC_RW_TREE_LOCK],
-[AC_MSG_CHECKING([if kernel has tree_lock as rwlock])
-tmp_flags="$EXTRA_KCFLAGS"
-EXTRA_KCFLAGS="-Werror"
-LB_LINUX_TRY_COMPILE([
-        #include <linux/fs.h>
+       inode = NULL;
+       inode->i_op->permission(NULL, 0);
 ],[
-       struct address_space a;
+       AC_DEFINE(HAVE_INODE_PERMISION_2ARGS, 1,
+               [inode_operations->permission has two args])
+])
+]) # LC_INODE_PERMISION_2ARGS
 
-       write_lock(&a.tree_lock);
+#
+# LC_BLK_QUEUE_MAX_SEGMENTS
+#
+# 2.6.32 replaces 2 functions blk_queue_max_phys_segments and blk_queue_max_hw_segments by blk_queue_max_segments
+#
+AC_DEFUN([LC_BLK_QUEUE_MAX_SEGMENTS], [
+LB_CHECK_COMPILE([if 'blk_queue_max_segments' is defined],
+blk_queue_max_segments, [
+       #include <linux/blkdev.h>
 ],[
-        AC_MSG_RESULT([yes])
-       AC_DEFINE(HAVE_RW_TREE_LOCK, 1, [kernel has tree_lock as rw_lock])
+       blk_queue_max_segments(NULL, 0);
 ],[
-        AC_MSG_RESULT([no])
-])
-EXTRA_KCFLAGS="$tmp_flags"
+       AC_DEFINE(HAVE_BLK_QUEUE_MAX_SEGMENTS, 1,
+               [blk_queue_max_segments is defined])
 ])
+]) # LC_BLK_QUEUE_MAX_SEGMENTS
 
-# 2.6.18
-
-# LC_UMOUNTBEGIN_HAS_VFSMOUNT
-# 2.6.18~2.6.25 umount_begin has different parameters
-AC_DEFUN([LC_UMOUNTBEGIN_HAS_VFSMOUNT],
-[AC_MSG_CHECKING([if umount_begin needs vfsmount parameter instead of super_block])
+#
+# LC_HAVE_DQUOT_FS_DISK_QUOTA
+#
+# 2.6.34 has quotactl_ops->[sg]et_dqblk that take struct fs_disk_quota
+#
+AC_DEFUN([LC_HAVE_DQUOT_FS_DISK_QUOTA], [
 tmp_flags="$EXTRA_KCFLAGS"
 EXTRA_KCFLAGS="-Werror"
-LB_LINUX_TRY_COMPILE([
+LB_CHECK_COMPILE([if 'quotactl_ops.set_dqblk' takes struct fs_disk_quota],
+fs_disk_quota, [
        #include <linux/fs.h>
-
-       struct vfsmount;
-       static void cfg_umount_begin (struct vfsmount *v, int flags)
-       {
-               ;
-       }
-
-       static struct super_operations cfg_super_operations = {
-               .umount_begin   = cfg_umount_begin,
-       };
+       #include <linux/quota.h>
 ],[
-       cfg_super_operations.umount_begin(NULL,0);
+       ((struct quotactl_ops *)0)->set_dqblk(NULL, 0, 0, (struct fs_disk_quota*)0);
 ],[
-       AC_MSG_RESULT(yes)
-       AC_DEFINE(HAVE_UMOUNTBEGIN_VFSMOUNT, 1,
-               [Define umount_begin need second argument])
+       AC_DEFINE(HAVE_DQUOT_FS_DISK_QUOTA, 1,
+               [quotactl_ops.set_dqblk takes struct fs_disk_quota])
 ],[
-       AC_MSG_RESULT(no)
+       LB_CHECK_COMPILE([if 'quotactl_ops.set_dqblk' takes struct kqid & fs_disk_quota],
+       kqid_fs_disk_quota, [
+               #include <linux/fs.h>
+               #include <linux/quota.h>
+       ],[
+               ((struct quotactl_ops *)0)->set_dqblk((struct super_block*)0, *((struct kqid*)0), (struct fs_disk_quota*)0);
+       ],[
+               AC_DEFINE(HAVE_DQUOT_FS_DISK_QUOTA, 1,
+                       [quotactl_ops.set_dqblk takes struct fs_disk_quota])
+               AC_DEFINE(HAVE_DQUOT_KQID, 1,
+                       [quotactl_ops.set_dqblk takes struct kqid])
+       ])
 ])
 EXTRA_KCFLAGS="$tmp_flags"
-])
-
-#2.6.18 + RHEL5 (fc6)
+]) # LC_HAVE_DQUOT_FS_DISK_QUOTA
 
 #
-# LC_LINUX_FIEMAP_H
+# LC_HAVE_DQUOT_SUSPEND
 #
-# fiemap.h is added since v2.6.28
-# RHEL5 2.6.18 has it, while SLES10 2.6.27 does not
+# 2.6.34 has renamed dquot options to dquot_*, check for dquot_suspend
 #
-AC_DEFUN([LC_LINUX_FIEMAP_H],
-[LB_CHECK_FILE([$LINUX/include/linux/fiemap.h],[
-        AC_MSG_CHECKING([if fiemap.h can be compiled])
-        LB_LINUX_TRY_COMPILE([
-                #include <linux/types.h>
-                #include <linux/fiemap.h>
-        ],[],[
-                AC_MSG_RESULT([yes])
-                AC_DEFINE(HAVE_LINUX_FIEMAP_H, 1, [Kernel has fiemap.h])
-        ],[
-                AC_MSG_RESULT([no])
-        ])
-],
-[])
-])
-
-# 2.6.19
-
-# LC_FILE_WRITEV
-# 2.6.19 replaced writev with aio_write
-AC_DEFUN([LC_FILE_WRITEV],
-[AC_MSG_CHECKING([writev in fops])
-LB_LINUX_TRY_COMPILE([
-        #include <linux/fs.h>
-],[
-        struct file_operations *fops = NULL;
-        fops->writev = NULL;
+AC_DEFUN([LC_HAVE_DQUOT_SUSPEND], [
+LB_CHECK_COMPILE([if 'dquot_suspend' is defined],
+dquot_suspend, [
+       #include <linux/quotaops.h>
 ],[
-        AC_MSG_RESULT(yes)
-        AC_DEFINE(HAVE_FILE_WRITEV, 1,
-                [use fops->writev])
+       dquot_suspend(NULL, -1);
 ],[
-       AC_MSG_RESULT(no)
+       AC_DEFINE(HAVE_DQUOT_SUSPEND, 1, [dquot_suspend is defined])
 ])
+]) # LC_HAVE_DQUOT_SUSPEND
+
+#
+# LC_QUOTA64
+#
+# Check if kernel has been patched for 64-bit quota limits support.
+# The upstream version of this patch in RHEL6 2.6.32 kernels introduces
+# the constant QFMT_VFS_V1 in include/linux/quota.h, so we can check for
+# that in the absence of quotaio_v1.h in the kernel headers.
+#
+AC_DEFUN([LC_QUOTA64], [
+tmp_flags="$EXTRA_KCFLAGS"
+EXTRA_KCFLAGS="-I$LINUX/fs"
+LB_CHECK_COMPILE([if kernel has 64-bit quota limits support],
+quota64, [
+       #include <linux/kernel.h>
+       #include <linux/fs.h>
+       #if defined(HAVE_FS_QUOTA_QUOTAIO_H)
+       #include <quota/quotaio_v2.h>
+       struct v2r1_disk_dqblk dqblk_r1;
+       #else
+       #include <linux/quota.h>
+       int ver = QFMT_VFS_V1;
+       #endif
+], [], [
+       AC_DEFINE(HAVE_QUOTA64, 1, [have quota64])
+],[
+       LB_CHECK_FILE([$LINUX/include/linux/lustre_version.h],
+               [AC_MSG_ERROR([You have got no 64-bit kernel quota support.])])
 ])
+EXTRA_KCFLAGS=$tmp_flags
+]) # LC_QUOTA64
 
-# LC_FILE_READV
-# 2.6.19 replaced readv with aio_read
-AC_DEFUN([LC_FILE_READV],
-[AC_MSG_CHECKING([readv in fops])
-LB_LINUX_TRY_COMPILE([
-        #include <linux/fs.h>
-],[
-        struct file_operations *fops = NULL;
-        fops->readv = NULL;
+#
+# LC_FS_STRUCT_RWLOCK
+#
+# 2.6.36 fs_struct.lock use spinlock instead of rwlock.
+#
+AC_DEFUN([LC_FS_STRUCT_RWLOCK], [
+LB_CHECK_COMPILE([if 'fs_struct.lock' use rwlock],
+fs_struct_rwlock, [
+       #include <asm/atomic.h>
+       #include <linux/spinlock.h>
+       #include <linux/fs_struct.h>
 ],[
-        AC_MSG_RESULT(yes)
-        AC_DEFINE(HAVE_FILE_READV, 1,
-                [use fops->readv])
+       ((struct fs_struct *)0)->lock = (rwlock_t){ 0 };
 ],[
-        AC_MSG_RESULT(no)
+       AC_DEFINE(HAVE_FS_STRUCT_RWLOCK, 1, [fs_struct.lock use rwlock])
 ])
-])
-
-# 2.6.20
+]) # LC_FS_STRUCT_RWLOCK
 
-# LC_CANCEL_DIRTY_PAGE
-# 2.6.20 introduced cancel_dirty_page instead of clear_page_dirty.
-AC_DEFUN([LC_CANCEL_DIRTY_PAGE],
-        [AC_MSG_CHECKING([kernel has cancel_dirty_page])
-        # the implementation of cancel_dirty_page in OFED 1.4.1's SLES10 SP2
-        # backport is broken, so ignore it
-        if test -f $OFED_BACKPORT_PATH/linux/mm.h &&
-           test "$(sed -ne '/^static inline void cancel_dirty_page(struct page \*page, unsigned int account_size)$/,/^}$/p' $OFED_BACKPORT_PATH/linux/mm.h | md5sum)" = "c518cb32d6394760c5bca14cb7538d3e  -"; then
-                AC_MSG_RESULT(no)
-        else
-                LB_LINUX_TRY_COMPILE([
-                        #include <linux/mm.h>
-                        #include <linux/page-flags.h>
-],[
-                        cancel_dirty_page(NULL, 0);
+#
+# LC_SBOPS_EVICT_INODE
+#
+# 2.6.36 super_operations add evict_inode method. it hybird of
+# delete_inode & clear_inode.
+#
+AC_DEFUN([LC_SBOPS_EVICT_INODE], [
+LB_CHECK_COMPILE([if 'super_operations.evict_inode' exist],
+super_ops_evict_inode, [
+       #include <linux/fs.h>
 ],[
-                        AC_MSG_RESULT(yes)
-                        AC_DEFINE(HAVE_CANCEL_DIRTY_PAGE, 1,
-                                  [kernel has cancel_dirty_page instead of clear_page_dirty])
+       ((struct super_operations *)0)->evict_inode(NULL);
 ],[
-                        AC_MSG_RESULT(no)
-])
-        fi
+       AC_DEFINE(HAVE_SBOPS_EVICT_INODE, 1,
+               [super_operations.evict_inode() is exist in kernel])
 ])
-
-# raid5-zerocopy patch
+]) # LC_SBOPS_EVICT_INODE
 
 #
-# LC_PAGE_CONSTANT
+# LC_FILE_FSYNC
 #
-# In order to support raid5 zerocopy patch, we have to patch the kernel to make
-# it support constant page, which means the page won't be modified during the
-# IO.
+# 2.6.35 file_operations.fsync taken 2 arguments.
+# 3.0.0 file_operations.fsync takes 4 arguments.
 #
-AC_DEFUN([LC_PAGE_CONSTANT],
-[AC_MSG_CHECKING([if kernel have PageConstant defined])
-LB_LINUX_TRY_COMPILE([
-        #include <linux/mm.h>
-        #include <linux/page-flags.h>
+AC_DEFUN([LC_FILE_FSYNC], [
+LB_CHECK_COMPILE([if 'file_operations.fsync' takes 4 arguments],
+file_ops_fsync_4args, [
+       #include <linux/fs.h>
 ],[
-        #ifndef PG_constant
-        #error "Have no raid5 zcopy patch"
-        #endif
+       ((struct file_operations *)0)->fsync(NULL, 0, 0, 0);
 ],[
-        AC_MSG_RESULT(yes)
-        AC_DEFINE(HAVE_PAGE_CONSTANT, 1, [kernel have PageConstant supported])
+       AC_DEFINE(HAVE_FILE_FSYNC_4ARGS, 1,
+               [file_operations.fsync takes 4 arguments])
 ],[
-        AC_MSG_RESULT(no);
-])
+       LB_CHECK_COMPILE([if 'file_operations.fsync' takes 2 arguments],
+       file_ops_fsync_2args, [
+               #include <linux/fs.h>
+       ],[
+               ((struct file_operations *)0)->fsync(NULL, 0);
+       ],[
+               AC_DEFINE(HAVE_FILE_FSYNC_2ARGS, 1,
+                       [file_operations.fsync takes 2 arguments])
+       ])
 ])
+]) # LC_FILE_FSYNC
 
-# 2.6.22
-
-# 2.6.22 lost second parameter for invalidate_bdev
-AC_DEFUN([LC_INVALIDATE_BDEV_2ARG],
-[AC_MSG_CHECKING([if invalidate_bdev has second argument])
-LB_LINUX_TRY_COMPILE([
-        #include <linux/buffer_head.h>
-],[
-        invalidate_bdev(NULL,0);
+#
+# LC_KERNEL_LOCKED
+#
+# 2.6.37 remove kernel_locked
+#
+AC_DEFUN([LC_KERNEL_LOCKED], [
+LB_CHECK_COMPILE([if 'kernel_locked' is defined],
+kernel_locked, [
+       #include <linux/smp_lock.h>
 ],[
-        AC_MSG_RESULT([yes])
-        AC_DEFINE(HAVE_INVALIDATE_BDEV_2ARG, 1,
-                [invalidate_bdev has second argument])
+       kernel_locked();
 ],[
-        AC_MSG_RESULT([no])
-])
+       AC_DEFINE(HAVE_KERNEL_LOCKED, 1, [kernel_locked is defined])
 ])
+]) # LC_KERNEL_LOCKED
 
 #
-# check for crypto API
+# LC_D_COMPARE_7ARGS
 #
-AC_DEFUN([LC_ASYNC_BLOCK_CIPHER],
-[AC_MSG_CHECKING([if kernel has block cipher support])
-LB_LINUX_TRY_COMPILE([
-        #include <linux/err.h>
-        #include <linux/crypto.h>
-],[
-        struct crypto_blkcipher *tfm;
-        tfm = crypto_alloc_blkcipher("aes", 0, sizeof(tfm) );
+# 2.6.38 dentry_operations.d_compare() taken 7 arguments.
+#
+AC_DEFUN([LC_D_COMPARE_7ARGS], [
+LB_CHECK_COMPILE([if 'dentry_operations.d_compare()' taken 7 arguments],
+dentry_ops_d_compare_7arg, [
+       #include <linux/dcache.h>
 ],[
-        AC_MSG_RESULT([yes])
-        AC_DEFINE(HAVE_ASYNC_BLOCK_CIPHER, 1, [kernel has block cipher support])
+       ((struct dentry_operations*)0)->d_compare(NULL,NULL,NULL,NULL,0,NULL,NULL);
 ],[
-        AC_MSG_RESULT([no])
-])
+       AC_DEFINE(HAVE_D_COMPARE_7ARGS, 1, [d_compare need 7 arguments])
 ])
+]) # LC_D_COMPARE_7ARGS
 
 #
-# check for struct hash_desc
+# LC_D_DELETE_CONST
 #
-AC_DEFUN([LC_STRUCT_HASH_DESC],
-[AC_MSG_CHECKING([if kernel has struct hash_desc])
-LB_LINUX_TRY_COMPILE([
-        #include <linux/err.h>
-        #include <linux/crypto.h>
+# 2.6.38 dentry_operations.d_delete() defined 'const' for 1st parameter.
+#
+AC_DEFUN([LC_D_DELETE_CONST], [
+tmp_flags="$EXTRA_KCFLAGS"
+EXTRA_KCFLAGS="-Werror"
+LB_CHECK_COMPILE([if 'dentry_operations.d_delete()' has const declare on first parameter],
+dentry_ops_d_delete_1st_const, [
+       #include <linux/dcache.h>
 ],[
-        struct hash_desc foo __attribute__ ((unused));
+       const struct dentry *d = NULL;
+       ((struct dentry_operations*)0)->d_delete(d);
 ],[
-        AC_MSG_RESULT([yes])
-        AC_DEFINE(HAVE_STRUCT_HASH_DESC, 1, [kernel has struct hash_desc])
+       AC_DEFINE(HAVE_D_DELETE_CONST, const,
+               [d_delete first parameter declared const])
 ],[
-        AC_MSG_RESULT([no])
-])
+       AC_DEFINE(HAVE_D_DELETE_CONST, [],
+               [d_delete first parameter declared is not const])
 ])
+EXTRA_KCFLAGS="$tmp_flags"
+]) # LC_D_DELETE_CONST
 
 #
-# check for struct blkcipher_desc
+# LC_DCACHE_LOCK
 #
-AC_DEFUN([LC_STRUCT_BLKCIPHER_DESC],
-[AC_MSG_CHECKING([if kernel has struct blkcipher_desc])
-LB_LINUX_TRY_COMPILE([
-        #include <linux/err.h>
-        #include <linux/crypto.h>
-],[
-        struct blkcipher_desc foo __attribute__ ((unused));
+# 2.6.38 dcache_lock removed. rcu-walk commited.
+#
+AC_DEFUN([LC_DCACHE_LOCK], [
+LB_CHECK_COMPILE([if 'dcache_lock' is exist],
+dcache_lock, [
+       #include <linux/dcache.h>
 ],[
-        AC_MSG_RESULT([yes])
-        AC_DEFINE(HAVE_STRUCT_BLKCIPHER_DESC, 1, [kernel has struct blkcipher_desc])
+       spin_lock(&dcache_lock);
 ],[
-        AC_MSG_RESULT([no])
-])
+       AC_DEFINE(HAVE_DCACHE_LOCK, 1,
+               [dcache_lock is exist])
 ])
+]) # LC_DCACHE_LOCK
 
 #
-# 2.6.19 check for FS_RENAME_DOES_D_MOVE flag
+# LC_INODE_I_RCU
 #
-AC_DEFUN([LC_FS_RENAME_DOES_D_MOVE],
-[AC_MSG_CHECKING([if kernel has FS_RENAME_DOES_D_MOVE flag])
-LB_LINUX_TRY_COMPILE([
-        #include <linux/fs.h>
-],[
-        int v __attribute__ ((unused));
-        v = FS_RENAME_DOES_D_MOVE;
+# 2.6.38 inode.i_rcu added.
+#
+AC_DEFUN([LC_INODE_I_RCU], [
+LB_CHECK_COMPILE([if 'inode.i_rcu' exists],
+inode_i_rcu, [
+       #include <linux/fs.h>
 ],[
-        AC_MSG_RESULT([yes])
-        AC_DEFINE(HAVE_FS_RENAME_DOES_D_MOVE, 1, [kernel has FS_RENAME_DOES_D_MOVE flag])
+       struct inode ino;
+       struct rcu_head rcu = {};
+       ino.i_rcu = rcu;
 ],[
-        AC_MSG_RESULT([no])
-])
+       AC_DEFINE(HAVE_INODE_I_RCU, 1,
+               [inode.i_rcu exists])
 ])
+]) # LC_INODE_I_RCU
+
+#
+# LC_BLKDEV_GET_BY_DEV
+#
+# 2.6.38 export blkdev_get_by_dev
+#
+AC_DEFUN([LC_BLKDEV_GET_BY_DEV], [
+LB_CHECK_EXPORT([blkdev_get_by_dev], [fs/block_dev.c],
+       [AC_DEFINE(HAVE_BLKDEV_GET_BY_DEV, 1,
+               [blkdev_get_by_dev is exported by the kernel])])
+]) # LC_BLKDEV_GET_BY_DEV
 
-# 2.6.23
+#
+# LC_EXPORT_SIMPLE_SETATTR
+#
+# 2.6.38 export simple_setattr
+#
+AC_DEFUN([LC_EXPORT_SIMPLE_SETATTR], [
+LB_CHECK_EXPORT([simple_setattr], [fs/libfs.c],
+       [AC_DEFINE(HAVE_SIMPLE_SETATTR, 1,
+               [simple_setattr is exported by the kernel])])
+]) # LC_EXPORT_SIMPLE_SETATTR
 
-# 2.6.23 have return type 'void' for unregister_blkdev
-AC_DEFUN([LC_UNREGISTER_BLKDEV_RETURN_INT],
-[AC_MSG_CHECKING([if unregister_blkdev return int])
-LB_LINUX_TRY_COMPILE([
-        #include <linux/fs.h>
-],[
-        int i __attribute__ ((unused));
-        i = unregister_blkdev(0,NULL);
+#
+# LC_IOP_TRUNCATE
+#
+# truncate callback removed since 2.6.39
+#
+AC_DEFUN([LC_IOP_TRUNCATE], [
+LB_CHECK_COMPILE([if 'inode_operations' has '.truncate' member function],
+inode_ops_truncate, [
+       #include <linux/fs.h>
 ],[
-        AC_MSG_RESULT([yes])
-        AC_DEFINE(HAVE_UNREGISTER_BLKDEV_RETURN_INT, 1,
-                [unregister_blkdev return int])
+       ((struct inode_operations *)0)->truncate(NULL);
 ],[
-        AC_MSG_RESULT([no])
-])
+       AC_DEFINE(HAVE_INODEOPS_TRUNCATE, 1,
+               [inode_operations has .truncate member function])
 ])
+]) # LC_IOP_TRUNCATE
 
-# 2.6.23 change .sendfile to .splice_read
-AC_DEFUN([LC_KERNEL_SPLICE_READ],
-[AC_MSG_CHECKING([if kernel has .splice_read])
-LB_LINUX_TRY_COMPILE([
-        #include <linux/fs.h>
+#
+# LC_REQUEST_QUEUE_UNPLUG_FN
+#
+# 2.6.39 remove unplug_fn from request_queue.
+#
+AC_DEFUN([LC_REQUEST_QUEUE_UNPLUG_FN], [
+LB_CHECK_COMPILE([if 'request_queue' has 'unplug_fn' field],
+request_queue_unplug_fn, [
+       #include <linux/blkdev.h>
 ],[
-        struct file_operations file;
-
-        file.splice_read = NULL;
-], [
-        AC_MSG_RESULT([yes])
-        AC_DEFINE(HAVE_KERNEL_SPLICE_READ, 1,
-                [kernel has .slice_read])
+       do {} while(sizeof(((struct request_queue *)0)->unplug_fn));
 ],[
-        AC_MSG_RESULT([no])
-])
+       AC_DEFINE(HAVE_REQUEST_QUEUE_UNPLUG_FN, 1,
+               [request_queue has unplug_fn field])
 ])
+]) # LC_REQUEST_QUEUE_UNPLUG_FN
 
-# 2.6.23 change .sendfile to .splice_read
-# RHEL4 (-92 kernel) have both sendfile and .splice_read API
-AC_DEFUN([LC_KERNEL_SENDFILE],
-[AC_MSG_CHECKING([if kernel has .sendfile])
-LB_LINUX_TRY_COMPILE([
-        #include <linux/fs.h>
+#
+# LC_HAVE_FSTYPE_MOUNT
+#
+# 2.6.39 replace get_sb with mount in struct file_system_type
+#
+AC_DEFUN([LC_HAVE_FSTYPE_MOUNT], [
+LB_CHECK_COMPILE([if 'file_system_type' has 'mount' field],
+file_system_type_mount, [
+       #include <linux/fs.h>
 ],[
-        struct file_operations file;
-
-        file.sendfile = NULL;
-], [
-        AC_MSG_RESULT([yes])
-        AC_DEFINE(HAVE_KERNEL_SENDFILE, 1,
-                [kernel has .sendfile])
+       struct file_system_type fst;
+       void *i = (void *) fst.mount;
 ],[
-        AC_MSG_RESULT([no])
-])
+       AC_DEFINE(HAVE_FSTYPE_MOUNT, 1,
+               [struct file_system_type has mount field])
 ])
+]) # LC_HAVE_FSTYPE_MOUNT
 
-# 2.6.23 extract nfs export related data into exportfs.h
-AC_DEFUN([LC_HAVE_EXPORTFS_H],
-[LB_CHECK_FILE([$LINUX/include/linux/exportfs.h], [
-        AC_DEFINE(HAVE_LINUX_EXPORTFS_H, 1,
-                [kernel has include/exportfs.h])
-],[
-        AC_MSG_RESULT([no])
-])
-])
+#
+# LC_HAVE_FHANDLE_SYSCALLS
+#
+# 2.6.39 The open_by_handle_at() and name_to_handle_at() system calls were
+# added to Linux kernel 2.6.39.
+# Check if client supports these functions
+#
+AC_DEFUN([LC_HAVE_FHANDLE_SYSCALLS], [
+LB_CHECK_CONFIG_IM([FHANDLE],[
+       AC_DEFINE(HAVE_FHANDLE_SYSCALLS, 1,
+               [kernel supports fhandles and related syscalls])
+       ])
+]) # LC_HAVE_FHANDLE_SYSCALLS
 
-# 2.6.23 has new page fault handling API
-AC_DEFUN([LC_VM_OP_FAULT],
-[AC_MSG_CHECKING([kernel has .fault in vm_operation_struct])
-LB_LINUX_TRY_COMPILE([
-        #include <linux/mm.h>
+#
+# LC_HAVE_INODE_OWNER_OR_CAPABLE
+#
+# 2.6.39 renames is_owner_or_cap to inode_owner_or_capable
+#
+AC_DEFUN([LC_HAVE_INODE_OWNER_OR_CAPABLE], [
+LB_CHECK_COMPILE([if 'inode_owner_or_capable' exist],
+inode_owner_or_capable, [
+       #include <linux/fs.h>
 ],[
-        struct vm_operations_struct op;
-
-        op.fault = NULL;
-], [
-        AC_MSG_RESULT([yes])
-        AC_DEFINE(HAVE_VM_OP_FAULT, 1,
-                [kernel has .fault in vm_operation_struct])
+       inode_owner_or_capable(NULL);
 ],[
-        AC_MSG_RESULT([no])
-])
-])
-
-# 2.6.23 add code to wait other users to complete before removing procfs entry
-AC_DEFUN([LC_PROCFS_USERS],
-[AC_MSG_CHECKING([if kernel has pde_users member in procfs entry struct])
-LB_LINUX_TRY_COMPILE([
-        #include <linux/proc_fs.h>
-],[
-        struct proc_dir_entry pde;
-
-        pde.pde_users   = 0;
-],[
-        AC_MSG_RESULT([yes])
-        AC_DEFINE(HAVE_PROCFS_USERS, 1,
-                [kernel has pde_users member in procfs entry struct])
-],[
-       LB_LINUX_TRY_COMPILE([
-               #include "$LINUX/fs/proc/internal.h"
-       ],[
-               struct proc_dir_entry_aux pde_aux;
-
-               pde_aux.pde_users = 0;
-       ],[
-               AC_MSG_RESULT([yes])
-               AC_DEFINE(HAVE_PROCFS_USERS, 1,
-                       [kernel has pde_users member in proc_dir_entry_aux])
-       ],[
-               AC_MSG_RESULT([no])
-       ])
-])
-])
-
-# 2.6.23 exports exportfs_decode_fh
-AC_DEFUN([LC_EXPORTFS_DECODE_FH],
-[LB_CHECK_SYMBOL_EXPORT([exportfs_decode_fh],
-[fs/exportfs/expfs.c],[
-        AC_DEFINE(HAVE_EXPORTFS_DECODE_FH, 1,
-                [exportfs_decode_fh has been export])
-],[
-])
-])
-
-# 2.6.24
-
-# 2.6.24 need linux/mm_types.h included
-AC_DEFUN([LC_HAVE_MMTYPES_H],
-[LB_CHECK_FILE([$LINUX/include/linux/mm_types.h], [
-        AC_DEFINE(HAVE_LINUX_MMTYPES_H, 1,
-                [kernel has include/mm_types.h])
-],[
-        AC_MSG_RESULT([no])
-])
-])
-
-# 2.6.24 has bio_endio with 2 args
-AC_DEFUN([LC_BIO_ENDIO_2ARG],
-[AC_MSG_CHECKING([if kernel has bio_endio with 2 args])
-LB_LINUX_TRY_COMPILE([
-        #include <linux/bio.h>
-],[
-        bio_endio(NULL, 0);
-], [
-        AC_MSG_RESULT([yes])
-        AC_DEFINE(HAVE_BIO_ENDIO_2ARG, 1,
-                [kernel has bio_endio with 2 args])
-],[
-        AC_MSG_RESULT([no])
-])
-])
-
-# 2.6.24 has new members in exports struct.
-AC_DEFUN([LC_FH_TO_DENTRY],
-[AC_MSG_CHECKING([if kernel has .fh_to_dentry member in export_operations struct])
-LB_LINUX_TRY_COMPILE([
-        #include <linux/fs.h>
-#ifdef HAVE_LINUX_EXPORTFS_H
-        #include <linux/exportfs.h>
-#endif
-],[
-        do{ }while(sizeof(((struct export_operations *)0)->fh_to_dentry));
-], [
-        AC_MSG_RESULT([yes])
-        AC_DEFINE(HAVE_FH_TO_DENTRY, 1,
-                [kernel has .fh_to_dentry member in export_operations struct])
-],[
-        AC_MSG_RESULT([no])
-])
-])
-
-# 2.6.24 removes long aged procfs entry -> deleted member
-AC_DEFUN([LC_PROCFS_DELETED],
-[AC_MSG_CHECKING([if kernel has deleted member in procfs entry struct])
-LB_LINUX_TRY_COMPILE([
-       #include <linux/proc_fs.h>
-],[
-        struct proc_dir_entry pde;
-
-        pde.deleted = sizeof(pde);
-], [
-        AC_MSG_RESULT([yes])
-        AC_DEFINE(HAVE_PROCFS_DELETED, 1,
-                [kernel has deleted member in procfs entry struct])
-],[
-        AC_MSG_RESULT([no])
-])
-])
-
-# 2.6.24 has bdi_init()/bdi_destroy() functions.
-AC_DEFUN([LC_EXPORT_BDI_INIT],
-[LB_CHECK_SYMBOL_EXPORT([bdi_init],
-[mm/backing-dev.c],[
-        AC_DEFINE(HAVE_BDI_INIT, 1,
-                [bdi_init/bdi_destroy functions are present])
-],[
-])
-])
-
-# 2.6.26
-
-# 2.6.26 isn't export set_fs_pwd and change paramter in fs struct
-AC_DEFUN([LC_FS_STRUCT_USE_PATH],
-[AC_MSG_CHECKING([fs_struct use path structure])
-LB_LINUX_TRY_COMPILE([
-        #include <asm/atomic.h>
-        #include <linux/spinlock.h>
-        #include <linux/fs_struct.h>
-],[
-        struct fs_struct fs;
-
-        fs.pwd = *((struct path *)sizeof(fs));
-], [
-        AC_MSG_RESULT([yes])
-        AC_DEFINE(HAVE_FS_STRUCT_USE_PATH, 1,
-                [fs_struct use path structure])
-],[
-        AC_MSG_RESULT([no])
-])
+       AC_DEFINE(HAVE_INODE_OWNER_OR_CAPABLE, 1,
+               [inode_owner_or_capable exist])
 ])
+]) # LC_HAVE_INODE_OWNER_OR_CAPABLE
 
 #
-# 2.6.27
+# LC_DIRTY_INODE_WITH_FLAG
 #
-
-# LC_SECURITY_PLUG  # for SLES10 SP2 (2.6.27)
-# check security plug in sles10 sp2 kernel
-AC_DEFUN([LC_SECURITY_PLUG],
-[AC_MSG_CHECKING([If kernel has security plug support])
-LB_LINUX_TRY_COMPILE([
-        #include <linux/fs.h>
-        #include <linux/stddef.h>
-],[
-        notify_change(NULL, NULL, NULL);
-],[
-        AC_MSG_RESULT(yes)
-        AC_DEFINE(HAVE_SECURITY_PLUG, 1,
-                [SLES10 SP2 use extra parameter in vfs])
-],[
-        AC_MSG_RESULT(no)
-])
-])
-
-AC_DEFUN([LC_PGMKWRITE_USE_VMFAULT],
-[AC_MSG_CHECKING([kernel .page_mkwrite uses struct vm_fault *])
-tmp_flags="$EXTRA_KCFLAGS"
-EXTRA_KCFLAGS="-Werror"
-LB_LINUX_TRY_COMPILE([
-        #include <linux/mm.h>
-],[
-        ((struct vm_operations_struct *)0)->page_mkwrite((struct vm_area_struct *)0, (struct vm_fault *)0);
-], [
-        AC_MSG_RESULT([yes])
-        AC_DEFINE(HAVE_PGMKWRITE_USE_VMFAULT, 1,
-                [kernel vm_operation_struct.page_mkwrite uses struct vm_fault * as second parameter])
-],[
-        AC_MSG_RESULT([no])
-])
-EXTRA_KCFLAGS="$tmp_flags"
-])
-
-AC_DEFUN([LC_PGMKWRITE_COMPACT],
-[AC_MSG_CHECKING([if kernel .page_mkwrite is located in vm_operation_struct._pmkw])
-tmp_flags="$EXTRA_KCFLAGS"
-EXTRA_KCFLAGS="-Werror"
-LB_LINUX_TRY_COMPILE([
-       #include <linux/mm.h>
-],[
-       struct vm_operations_struct *vm_ops;
-
-       vm_ops = NULL;
-       vm_ops->_pmkw.page_mkwrite(NULL, NULL);
-], [
-       AC_MSG_RESULT([yes])
-       AC_DEFINE(HAVE_PGMKWRITE_COMPACT, 1,
-               [kernel .page_mkwrite is located in vm_operation_struct._pmkw])
-],[
-       AC_MSG_RESULT([no])
-])
-EXTRA_KCFLAGS="$tmp_flags"
-])
-
-AC_DEFUN([LC_INODE_PERMISION_2ARGS],
-[AC_MSG_CHECKING([inode_operations->permission has two args])
-LB_LINUX_TRY_COMPILE([
-        #include <linux/fs.h>
-],[
-        struct inode *inode __attribute__ ((unused));
-
-        inode = NULL;
-        inode->i_op->permission(NULL, 0);
-],[
-        AC_DEFINE(HAVE_INODE_PERMISION_2ARGS, 1,
-                  [inode_operations->permission has two args])
-        AC_MSG_RESULT([yes])
-],[
-        AC_MSG_RESULT([no])
-])
-])
-
-# 2.6.27 have new page locking API
-AC_DEFUN([LC_TRYLOCKPAGE],
-[AC_MSG_CHECKING([kernel uses trylock_page for page lock])
-LB_LINUX_TRY_COMPILE([
-        #include <linux/pagemap.h>
-],[
-        trylock_page(NULL);
-],[
-        AC_DEFINE(HAVE_TRYLOCK_PAGE, 1,
-                  [kernel uses trylock_page for page lock])
-        AC_MSG_RESULT([yes])
-],[
-        AC_MSG_RESULT([no])
-])
-])
-
-# 2.6.27 removed the read_inode from super_operations.
-AC_DEFUN([LC_READ_INODE_IN_SBOPS],
-[AC_MSG_CHECKING([super_operations has a read_inode field])
-LB_LINUX_TRY_COMPILE([
-        #include <linux/fs.h>
-],[
-        struct super_operations *sop;
-        sop->read_inode(NULL);
-],[
-        AC_DEFINE(HAVE_READ_INODE_IN_SBOPS, 1,
-                [super_operations has a read_inode])
-        AC_MSG_RESULT([yes])
-],[
-        AC_MSG_RESULT([no])
-])
-])
-
-# 2.6.27 has inode_permission instead of permisson
-AC_DEFUN([LC_EXPORT_INODE_PERMISSION],
-[LB_CHECK_SYMBOL_EXPORT([inode_permission],
-[fs/namei.c],[
-AC_DEFINE(HAVE_EXPORT_INODE_PERMISSION, 1,
-            [inode_permission is exported by the kernel])
-],[
-])
-])
-
-# 2.6.27 use 5th parameter in quota_on for remount.
-AC_DEFUN([LC_QUOTA_ON_5ARGS],
-[AC_MSG_CHECKING([quota_on needs 5 parameters])
-LB_LINUX_TRY_COMPILE([
-        #include <linux/fs.h>
-        #include <linux/quota.h>
-],[
-        struct quotactl_ops *qop = NULL;
-        qop->quota_on(NULL, 0, 0, NULL, 0);
-],[
-        AC_DEFINE(HAVE_QUOTA_ON_5ARGS, 1,
-                [quota_on needs 5 paramters])
-        AC_MSG_RESULT([yes])
-],[
-        AC_MSG_RESULT([no])
-])
-])
-
-# 2.6.27 use 3th parameter in quota_off for remount.
-AC_DEFUN([LC_QUOTA_OFF_3ARGS],
-[AC_MSG_CHECKING([quota_off needs 3 parameters])
-LB_LINUX_TRY_COMPILE([
-        #include <linux/fs.h>
-        #include <linux/quota.h>
-],[
-        struct quotactl_ops *qop = NULL;
-        qop->quota_off(NULL, 0, 0);
-],[
-        AC_DEFINE(HAVE_QUOTA_OFF_3ARGS, 1,
-                [quota_off needs 3 paramters])
-        AC_MSG_RESULT([yes])
-],[
-        AC_MSG_RESULT([no])
-])
-])
-
-# 2.6.27 has vfs_dq_off inline function.
-AC_DEFUN([LC_VFS_DQ_OFF],
-[AC_MSG_CHECKING([vfs_dq_off is defined])
-LB_LINUX_TRY_COMPILE([
-        #include <linux/quotaops.h>
-],[
-        vfs_dq_off(NULL, 0);
-],[
-        AC_DEFINE(HAVE_VFS_DQ_OFF, 1, [vfs_dq_off is defined])
-        AC_MSG_RESULT([yes])
-],[
-        AC_MSG_RESULT([no])
-])
-])
-
-# LC_LOCK_MAP_ACQUIRE
-# after 2.6.27 lock_map_acquire replaces lock_acquire
-AC_DEFUN([LC_LOCK_MAP_ACQUIRE],
-[AC_MSG_CHECKING([if lock_map_acquire is defined])
-LB_LINUX_TRY_COMPILE([
-        #include <linux/lockdep.h>
-],[
-        lock_map_acquire(NULL);
-],[
-        AC_MSG_RESULT(yes)
-        AC_DEFINE(HAVE_LOCK_MAP_ACQUIRE, 1,
-                [lock_map_acquire is defined])
-],[
-        AC_MSG_RESULT(no)
-])
-])
-
-# 2.6.27.15-2 sles11
-
-# 2.6.27 sles11 remove the bi_hw_segments
-AC_DEFUN([LC_BI_HW_SEGMENTS],
-[AC_MSG_CHECKING([struct bio has a bi_hw_segments field])
-LB_LINUX_TRY_COMPILE([
-        #include <linux/bio.h>
-],[
-        struct bio io;
-        io.bi_hw_segments = sizeof(io);
-],[
-        AC_DEFINE(HAVE_BI_HW_SEGMENTS, 1,
-                [struct bio has a bi_hw_segments field])
-        AC_MSG_RESULT([yes])
-],[
-        AC_MSG_RESULT([no])
-])
-])
-
+# 3.0 dirty_inode() has a flag parameter
+# see kernel commit aa38572954ade525817fe88c54faebf85e5a61c0
 #
-# 2.6.27 sles11 move the quotaio_v1{2}.h from include/linux to fs
-# 2.6.32 move the quotaio_v1{2}.h from fs to fs/quota
-AC_DEFUN([LC_HAVE_QUOTAIO_H],
-[LB_CHECK_FILE([$LINUX/include/linux/quotaio_v2.h],[
-        AC_DEFINE(HAVE_QUOTAIO_H, 1,
-                [kernel has include/linux/quotaio_v2.h])
-],[LB_CHECK_FILE([$LINUX/fs/quotaio_v2.h],[
-               AC_DEFINE(HAVE_FS_QUOTAIO_H, 1,
-                [kernel has fs/quotaio_v1.h])
-],[LB_CHECK_FILE([$LINUX/fs/quota/quotaio_v2.h],[
-               AC_DEFINE(HAVE_FS_QUOTA_QUOTAIO_H, 1,
-                [kernel has fs/quota/quotaio_v2.h])
-],[
-        AC_MSG_RESULT([no])
-])
-])
-])
-])
-
-# 2.6.27 sles11 has sb_any_quota_active
-AC_DEFUN([LC_SB_ANY_QUOTA_ACTIVE],
-[AC_MSG_CHECKING([Kernel has sb_any_quota_active])
-LB_LINUX_TRY_COMPILE([
-        #include <linux/quotaops.h>
-],[
-        sb_any_quota_active(NULL);
-],[
-        AC_DEFINE(HAVE_SB_ANY_QUOTA_ACTIVE, 1,
-                [Kernel has a sb_any_quota_active])
-        AC_MSG_RESULT([yes])
-],[
-        AC_MSG_RESULT([no])
-])
-])
-
-# 2.6.27 sles11 has sb_has_quota_active
-AC_DEFUN([LC_SB_HAS_QUOTA_ACTIVE],
-[AC_MSG_CHECKING([Kernel has sb_has_quota_active])
-LB_LINUX_TRY_COMPILE([
-        #include <linux/quotaops.h>
-],[
-        sb_has_quota_active(NULL, 0);
-],[
-        AC_DEFINE(HAVE_SB_HAS_QUOTA_ACTIVE, 1,
-                [Kernel has a sb_has_quota_active])
-        AC_MSG_RESULT([yes])
+AC_DEFUN([LC_DIRTY_INODE_WITH_FLAG], [
+LB_CHECK_COMPILE([if 'dirty_inode' super_operation takes flag],
+dirty_inode_super_operation_flag, [
+       #include <linux/fs.h>
 ],[
-        AC_MSG_RESULT([no])
-])
-])
-
-# 2.6.27 exported add_to_page_cache_lru.
-AC_DEFUN([LC_EXPORT_ADD_TO_PAGE_CACHE_LRU],
-[LB_CHECK_SYMBOL_EXPORT([add_to_page_cache_lru],
-[mm/filemap.c],[
-        AC_DEFINE(HAVE_ADD_TO_PAGE_CACHE_LRU, 1,
-                [add_to_page_cache_lru functions are present])
+       struct inode *inode;
+       inode->i_sb->s_op->dirty_inode(NULL, 0);
 ],[
+       AC_DEFINE(HAVE_DIRTY_INODE_HAS_FLAG, 1,
+               [dirty_inode super_operation takes flag])
 ])
-])
+]) # LC_DIRTY_INODE_WITH_FLAG
 
 #
-# 2.6.29 introduce sb_any_quota_loaded.
+# LC_GENERIC_PERMISSION
 #
-AC_DEFUN([LC_SB_ANY_QUOTA_LOADED],
-[AC_MSG_CHECKING([Kernel has sb_any_quota_loaded])
-LB_LINUX_TRY_COMPILE([
-        #include <linux/quotaops.h>
-],[
-        sb_any_quota_loaded(NULL);
-],[
-        AC_DEFINE(HAVE_SB_ANY_QUOTA_LOADED, 1,
-                [Kernel has a sb_any_quota_loaded])
-        AC_MSG_RESULT([yes])
-],[
-        AC_MSG_RESULT([no])
-])
-])
-
-# 2.6.30 x86 node_to_cpumask has been removed. must use cpumask_of_node
-AC_DEFUN([LC_EXPORT_CPUMASK_OF_NODE],
-         [LB_CHECK_SYMBOL_EXPORT([node_to_cpumask_map],
-                                 [arch/$LINUX_ARCH/mm/numa.c],
-                                 [AC_DEFINE(HAVE_CPUMASK_OF_NODE, 1,
-                                            [node_to_cpumask_map is exported by
-                                             the kernel])]) # x86_64
-         ])
-
-# 2.6.31 replaces blk_queue_hardsect_size by blk_queue_logical_block_size function
-AC_DEFUN([LC_BLK_QUEUE_LOG_BLK_SIZE],
-[AC_MSG_CHECKING([if blk_queue_logical_block_size is defined])
-LB_LINUX_TRY_COMPILE([
-        #include <linux/blkdev.h>
-],[
-        blk_queue_logical_block_size(NULL, 0);
-],[
-        AC_MSG_RESULT(yes)
-        AC_DEFINE(HAVE_BLK_QUEUE_LOG_BLK_SIZE, 1,
-                  [blk_queue_logical_block_size is defined])
-],[
-        AC_MSG_RESULT(no)
-])
-])
-
-# 2.6.32
-
-# 2.6.32 introduced inode_newsize_ok
-AC_DEFUN([LC_VFS_INODE_NEWSIZE_OK],
-[AC_MSG_CHECKING([if inode_newsize_ok is defined])
-LB_LINUX_TRY_COMPILE([
+# 2.6.38 generic_permission taken 4 parameters.
+# in fact, it means rcu-walk aware permission bring.
+#
+# 3.1 generic_permission taken 2 parameters.
+# see kernel commit 2830ba7f34ebb27c4e5b8b6ef408cd6d74860890
+#
+AC_DEFUN([LC_GENERIC_PERMISSION], [
+LB_CHECK_COMPILE([if 'generic_permission' take 2 arguments],
+generic_permission_2args, [
        #include <linux/fs.h>
 ],[
-       return inode_newsize_ok(NULL, 0);
-],[
-       AC_MSG_RESULT(yes)
-       AC_DEFINE(HAVE_VFS_INODE_NEWSIZE_OK, 1,
-                 [inode_newsize_ok is defined])
-],[
-       AC_MSG_RESULT(no)
-])
-])
-
-# 2.6.32 changes cache_detail's member cache_request to cache_upcall
-# in kernel commit bc74b4f5e63a09fb78e245794a0de1e5a2716bbe
-AC_DEFUN([LC_CACHE_UPCALL],
-[AC_MSG_CHECKING([if cache_detail has cache_upcall field])
-        LB_LINUX_TRY_COMPILE([
-                #include <linux/sunrpc/cache.h>
-        ],[
-                struct cache_detail cd;
-                cd.cache_upcall = NULL;
-        ],[
-                AC_MSG_RESULT(yes)
-                AC_DEFINE(HAVE_CACHE_UPCALL, 1,
-                          [cache_detail has cache_upcall field])
-        ],[
-                AC_MSG_RESULT(no)
-        ])
-])
-
-# 2.6.32 add a limits member in struct request_queue.
-AC_DEFUN([LC_REQUEST_QUEUE_LIMITS],
-[AC_MSG_CHECKING([if request_queue has a limits field])
-LB_LINUX_TRY_COMPILE([
-        #include <linux/blkdev.h>
-],[
-        struct request_queue rq;
-        rq.limits.io_min = 0;
-],[
-        AC_MSG_RESULT(yes)
-        AC_DEFINE(HAVE_REQUEST_QUEUE_LIMITS, 1,
-                  [request_queue has a limits field])
-],[
-        AC_MSG_RESULT(no)
-])
-])
-
-# 2.6.32 has bdi_register() functions.
-AC_DEFUN([LC_EXPORT_BDI_REGISTER],
-[LB_CHECK_SYMBOL_EXPORT([bdi_register],
-[mm/backing-dev.c],[
-        AC_DEFINE(HAVE_BDI_REGISTER, 1,
-                [bdi_register function is present])
-],[
-])
-])
-
-# 2.6.32 add s_bdi for super block
-AC_DEFUN([LC_SB_BDI],
-[AC_MSG_CHECKING([if super_block has s_bdi field])
-LB_LINUX_TRY_COMPILE([
-        #include <linux/fs.h>
-],[
-        struct super_block sb;
-        sb.s_bdi = NULL;
-],[
-        AC_MSG_RESULT(yes)
-        AC_DEFINE(HAVE_SB_BDI, 1,
-                  [super_block has s_bdi field])
-],[
-        AC_MSG_RESULT(no)
-])
-])
-
-#  2.6.27.15-2 SuSE 11 sp0 kernels lack the name field for BDI
-AC_DEFUN([LC_BDI_NAME],
-[AC_MSG_CHECKING([if backing_device_info has name field])
-LB_LINUX_TRY_COMPILE([
-        #include <linux/blkdev.h>
-],[
-        struct backing_dev_info bdi;
-        bdi.name = NULL;
-],[
-        AC_MSG_RESULT(yes)
-        AC_DEFINE(HAVE_BDI_NAME, 1,
-                  [backing_device_info has name field])
-],[
-        AC_MSG_RESULT(no)
-])
-])  
-
-# 2.6.32 removes blk_queue_max_sectors and add blk_queue_max_hw_sectors
-# check blk_queue_max_sectors and use it until disappear.
-AC_DEFUN([LC_BLK_QUEUE_MAX_SECTORS],
-[AC_MSG_CHECKING([if blk_queue_max_sectors is defined])
-LB_LINUX_TRY_COMPILE([
-        #include <linux/blkdev.h>
-],[
-        blk_queue_max_sectors(NULL, 0);
+       generic_permission(NULL, 0);
 ],[
-        AC_MSG_RESULT(yes)
-        AC_DEFINE(HAVE_BLK_QUEUE_MAX_SECTORS, 1,
-                  [blk_queue_max_sectors is defined])
+       AC_DEFINE(HAVE_GENERIC_PERMISSION_2ARGS, 1,
+               [generic_permission taken 2 arguments])
 ],[
-        AC_MSG_RESULT(no)
-])
+       LB_CHECK_COMPILE([if 'generic_permission' take 4 arguments],
+       generic_permission_4args, [
+               #include <linux/fs.h>
+       ],[
+               generic_permission(NULL, 0, 0, NULL);
+       ],[
+               AC_DEFINE(HAVE_GENERIC_PERMISSION_4ARGS, 1,
+                       [generic_permission taken 4 arguments])
+       ])
 ])
+]) # LC_GENERIC_PERMISSION
 
-# 2.6.32 replaces 2 functions blk_queue_max_phys_segments and blk_queue_max_hw_segments by blk_queue_max_segments
-AC_DEFUN([LC_BLK_QUEUE_MAX_SEGMENTS],
-[AC_MSG_CHECKING([if blk_queue_max_segments is defined])
-LB_LINUX_TRY_COMPILE([
-        #include <linux/blkdev.h>
-],[
-        blk_queue_max_segments(NULL, 0);
+#
+# LC_LM_XXX_LOCK_MANAGER_OPS
+#
+# 3.1 renames lock-manager ops(lock_manager_operations) from fl_xxx to lm_xxx
+# see kernel commit 8fb47a4fbf858a164e973b8ea8ef5e83e61f2e50
+#
+AC_DEFUN([LC_LM_XXX_LOCK_MANAGER_OPS], [
+LB_CHECK_COMPILE([if 'lock-manager' ops renamed to 'lm_xxx'],
+lock_manager_ops_lm_xxx, [
+       #include <linux/fs.h>
 ],[
-        AC_MSG_RESULT(yes)
-        AC_DEFINE(HAVE_BLK_QUEUE_MAX_SEGMENTS, 1,
-                  [blk_queue_max_segments is defined])
+       struct lock_manager_operations lm_ops;
+       lm_ops.lm_compare_owner = NULL;
 ],[
-        AC_MSG_RESULT(no)
-])
+       AC_DEFINE(HAVE_LM_XXX_LOCK_MANAGER_OPS, 1,
+               [lock-manager ops renamed to lm_xxx])
 ])
+]) # LC_LM_XXX_LOCK_MANAGER_OPS
 
 #
-# LC_QUOTA64
+# LC_INODE_DIO_WAIT
 #
-# Check if kernel has been patched for 64-bit quota limits support.
-# The upstream version of this patch in RHEL6 2.6.32 kernels introduces
-# the constant QFMT_VFS_V1 in include/linux/quota.h, so we can check for
-# that in the absence of quotaio_v1.h in the kernel headers.
+# 3.1 kills inode->i_alloc_sem, use i_dio_count and inode_dio_wait/
+#     inode_dio_done instead.
+# see kernel commit bd5fe6c5eb9c548d7f07fe8f89a150bb6705e8e3
 #
-AC_DEFUN([LC_QUOTA64],[
-        AC_MSG_CHECKING([if kernel has 64-bit quota limits support])
-tmp_flags="$EXTRA_KCFLAGS"
-EXTRA_KCFLAGS="-I$LINUX/fs"
-        LB_LINUX_TRY_COMPILE([
-                #include <linux/kernel.h>
-                #include <linux/fs.h>
-                #ifdef HAVE_QUOTAIO_H
-                # include <linux/quotaio_v2.h>
-                int versions[] = V2_INITQVERSIONS_R1;
-                struct v2_disk_dqblk_r1 dqblk_r1;
-                #elif defined(HAVE_FS_QUOTA_QUOTAIO_H)
-                # include <quota/quotaio_v2.h>
-                struct v2r1_disk_dqblk dqblk_r1;
-                #elif defined(HAVE_FS_QUOTAIO_H)
-                # include <quotaio_v2.h>
-                struct v2r1_disk_dqblk dqblk_r1;
-                #else
-                #include <linux/quota.h>
-                int ver = QFMT_VFS_V1;
-                #endif
-        ],[],[
-                AC_DEFINE(HAVE_QUOTA64, 1, [have quota64])
-                AC_MSG_RESULT([yes])
-        ],[
-                LB_CHECK_FILE([$LINUX/include/linux/lustre_version.h],[
-                        AC_MSG_ERROR([You have got no 64-bit kernel quota support.])
-                ],[])
-                AC_MSG_RESULT([no])
-        ])
-EXTRA_KCFLAGS=$tmp_flags
-])
-
-# 2.6.32 set_cpus_allowed is no more defined if CONFIG_CPUMASK_OFFSTACK=yes
-AC_DEFUN([LC_SET_CPUS_ALLOWED],
-         [AC_MSG_CHECKING([if kernel defines set_cpus_allowed])
-          LB_LINUX_TRY_COMPILE(
-                [#include <linux/sched.h>],
-                [struct task_struct *p = NULL;
-                 cpumask_t mask = { { 0 } };
-                 (void) set_cpus_allowed(p, mask);],
-                [AC_MSG_RESULT([yes])
-                 AC_DEFINE(HAVE_SET_CPUS_ALLOWED, 1,
-                           [set_cpus_allowed is exported by the kernel])],
-                [AC_MSG_RESULT([no])] )])
-
-# 2.6.32 introduces selinux_is_enabled()
-AC_DEFUN([LC_SELINUX_IS_ENABLED],
-[AC_MSG_CHECKING([if selinux_is_enabled is available])
-LB_LINUX_TRY_COMPILE([
-        #include <linux/selinux.h>
-],[
-        selinux_is_enabled();
+AC_DEFUN([LC_INODE_DIO_WAIT], [
+LB_CHECK_COMPILE([if 'inode->i_alloc_sem' is killed and use inode_dio_wait/done],
+inode_dio_wait, [
+       #include <linux/fs.h>
 ],[
-        AC_MSG_RESULT([yes])
-        AC_DEFINE(HAVE_SELINUX_IS_ENABLED, 1,
-                [selinux_is_enabled is defined])
+       inode_dio_wait((struct inode *)0);
+       inode_dio_done((struct inode *)0);
 ],[
-        AC_MSG_RESULT([no])
-])
+       AC_DEFINE(HAVE_INODE_DIO_WAIT, 1,
+               [inode->i_alloc_sem is killed and use inode_dio_wait/done])
 ])
+]) # LC_INODE_DIO_WAIT
 
 #
-# LC_D_OBTAIN_ALIAS
-# starting from 2.6.28 kernel replaces d_alloc_anon() with
-# d_obtain_alias() for getting anonymous dentries
-# RHEL5(2.6.18) has d_obtain_alias but SLES11SP0(2.6.27) not
+# LC_IOP_GET_ACL
 #
-AC_DEFUN([LC_D_OBTAIN_ALIAS],
-[AC_MSG_CHECKING([d_obtain_alias exist in kernel])
-LB_LINUX_TRY_COMPILE([
-        #include <linux/dcache.h>
-],[
-        d_obtain_alias(NULL);
+# 3.1 adds get_acl method to inode_operations to read ACL from disk.
+# see kernel commit 4e34e719e457f2e031297175410fc0bd4016a085
+#
+AC_DEFUN([LC_IOP_GET_ACL], [
+LB_CHECK_COMPILE([if 'inode_operations' has '.get_acl' member function],
+inode_ops_get_acl, [
+       #include <linux/fs.h>
 ],[
-        AC_DEFINE(HAVE_D_OBTAIN_ALIAS, 1,
-                [d_obtain_alias exist in kernel])
-        AC_MSG_RESULT([yes])
+       struct inode_operations iop;
+       iop.get_acl = NULL;
 ],[
-        AC_MSG_RESULT([no])
-])
+       AC_DEFINE(HAVE_IOP_GET_ACL, 1,
+               [inode_operations has .get_acl member function])
 ])
+]) # LC_IOP_GET_ACL
 
 #
-# LC_EXPORT_GENERIC_ERROR_REMOVE_PAGE
+# LC_FILE_LLSEEK_SIZE
 #
-AC_DEFUN([LC_EXPORT_GENERIC_ERROR_REMOVE_PAGE],
-         [LB_CHECK_SYMBOL_EXPORT(
-                        [generic_error_remove_page],
-                        [mm/truncate.c],
-                        [AC_DEFINE(HAS_GENERIC_ERROR_REMOVE_PAGE, 1,
-                                [kernel export generic_error_remove_page])],
-                        [])
-         ]
-)
-
-# 2.6.32 if kernel export access_process_vm().
-AC_DEFUN([LC_EXPORT_ACCESS_PROCESS_VM],
-        [LB_CHECK_SYMBOL_EXPORT([access_process_vm],
-                        [mm/memory.c],
-                        [AC_DEFINE(HAVE_ACCESS_PROCESS_VM, 1,
-                                [access_process_vm function is present])],
-                        [])
-        ]
-)
+# 3.1 introduced generic_file_llseek_size()
+#
+AC_DEFUN([LC_FILE_LLSEEK_SIZE], [
+LB_CHECK_EXPORT([generic_file_llseek_size], [fs/read_write.c],
+       [AC_DEFINE(HAVE_FILE_LLSEEK_SIZE, 1,
+               [generic_file_llseek_size is exported by the kernel])])
+]) # LC_FILE_LLSEEK_SIZE
 
 #
-# 2.6.36 fs_struct.lock use spinlock instead of rwlock.
+# LC_HAVE_VOID_MAKE_REQUEST_FN
 #
-AC_DEFUN([LC_FS_STRUCT_RWLOCK],
-[AC_MSG_CHECKING([if fs_struct.lock use rwlock])
-LB_LINUX_TRY_COMPILE([
-        #include <asm/atomic.h>
-        #include <linux/spinlock.h>
-        #include <linux/fs_struct.h>
-],[
-        ((struct fs_struct *)0)->lock = (rwlock_t){ 0 };
-],[
-        AC_DEFINE(HAVE_FS_STRUCT_RWLOCK, 1,
-                  [fs_struct.lock use rwlock])
-        AC_MSG_RESULT([yes])
+# 3.2 request_queue.make_request_fn defined as function returns with void
+# see kernel commit 5a7bbad27a410350e64a2d7f5ec18fc73836c14f
+#
+AC_DEFUN([LC_HAVE_VOID_MAKE_REQUEST_FN], [
+LB_CHECK_COMPILE([if 'request_queue.make_request_fn' returns void but not int],
+make_request_fn_void, [
+       #include <linux/blkdev.h>
 ],[
-        AC_MSG_RESULT([no])
-])
+       int ret;
+       make_request_fn *mrf;
+       ret = mrf(NULL, NULL);
+],[],[
+       AC_DEFINE(HAVE_VOID_MAKE_REQUEST_FN, 1,
+               [request_queue.make_request_fn returns void but not int])
 ])
+]) # LC_HAVE_VOID_MAKE_REQUEST_FN
 
 #
-# 2.6.36 super_operations add evict_inode method. it hybird of
-# delete_inode & clear_inode.
+# LC_HAVE_PROTECT_I_NLINK
 #
-AC_DEFUN([LC_SBOPS_EVICT_INODE],
-[AC_MSG_CHECKING([if super_operations.evict_inode exist])
-LB_LINUX_TRY_COMPILE([
-        #include <linux/fs.h>
-],[
-        ((struct super_operations *)0)->evict_inode(NULL);
+# 3.2 protects inode->i_nlink from direct modification
+# see kernel commit a78ef704a8dd430225955f0709b22d4a6ba21deb
+# at the same time adds set_nlink(), so checks set_nlink() for it.
+#
+AC_DEFUN([LC_HAVE_PROTECT_I_NLINK], [
+LB_CHECK_COMPILE([if 'inode->i_nlink' is protected from direct modification],
+inode_i_nlink_protected, [
+       #include <linux/fs.h>
 ],[
-        AC_DEFINE(HAVE_SBOPS_EVICT_INODE, 1,
-                [super_operations.evict_inode() is exist in kernel])
-        AC_MSG_RESULT([yes])
+       struct inode i;
+       set_nlink(&i, 1);
 ],[
-        AC_MSG_RESULT([no])
-])
+       AC_DEFINE(HAVE_PROTECT_I_NLINK, 1,
+               [inode->i_nlink is protected from direct modification])
 ])
+]) # LC_HAVE_PROTECT_I_NLINK
 
 #
-# 2.6.35 file_operations.fsync taken 2 arguments.
-# 3.0.0 file_operations.fsync takes 4 arguments.
+# LC_HAVE_MIGRATE_HEADER
 #
-AC_DEFUN([LC_FILE_FSYNC],
-[AC_MSG_CHECKING([if file_operations.fsync takes 4 or 2 arguments])
-LB_LINUX_TRY_COMPILE([
-        #include <linux/fs.h>
-],[
-        ((struct file_operations *)0)->fsync(NULL, 0, 0, 0);
-],[
-        AC_DEFINE(HAVE_FILE_FSYNC_4ARGS, 1,
-                [file_operations.fsync takes 4 arguments])
-        AC_MSG_RESULT([yes, 4 args])
+# 3.3 introduces migrate_mode.h and migratepage has 4 args
+#
+AC_DEFUN([LC_HAVE_MIGRATE_HEADER], [
+LB_CHECK_FILE([$LINUX/include/linux/migrate.h], [
+       AC_DEFINE(HAVE_MIGRATE_H, 1,
+               [kernel has include/linux/migrate.h])
 ],[
-        LB_LINUX_TRY_COMPILE([
-                #include <linux/fs.h>
-        ],[
-           ((struct file_operations *)0)->fsync(NULL, 0);
-        ],[
-                AC_DEFINE(HAVE_FILE_FSYNC_2ARGS, 1,
-                        [file_operations.fsync takes 2 arguments])
-                AC_MSG_RESULT([yes, 2 args])
-        ],[
-                AC_MSG_RESULT([no])
-        ])
-])
+       LB_CHECK_FILE([$LINUX/include/linux/migrate_mode.h], [
+               AC_DEFINE(HAVE_MIGRATE_MODE_H, 1,
+                       [kernel has include/linux/migrate_mode.h])
+       ])
 ])
+]) # LC_HAVE_MIGRATE_HEADER
 
 #
-# 2.6.37 remove kernel_locked
+# LC_MIGRATEPAGE_4ARGS
 #
-AC_DEFUN([LC_KERNEL_LOCKED],
-[AC_MSG_CHECKING([if kernel_locked is defined])
-LB_LINUX_TRY_COMPILE([
-        #include <linux/smp_lock.h>
-],[
-        kernel_locked();
+AC_DEFUN([LC_MIGRATEPAGE_4ARGS], [
+LB_CHECK_COMPILE([if 'address_space_operations.migratepage' has 4 args],
+address_space_ops_migratepage_4args, [
+       #include <linux/fs.h>
+#ifdef HAVE_MIGRATE_H
+       #include <linux/migrate.h>
+#elif defined(HAVE_MIGRATE_MODE_H)
+       #include <linux/migrate_mode.h>
+#endif
 ],[
-        AC_MSG_RESULT([yes])
-        AC_DEFINE(HAVE_KERNEL_LOCKED, 1,
-                [kernel_locked is defined])
+       struct address_space_operations aops;
+       aops.migratepage(NULL, NULL, NULL, MIGRATE_ASYNC);
 ],[
-        AC_MSG_RESULT([no])
-])
+       AC_DEFINE(HAVE_MIGRATEPAGE_4ARGS, 1,
+               [address_space_operations.migratepage has 4 args])
 ])
+]) # LC_MIGRATEPAGE_4ARGS
 
 #
-# 2.6.38 dentry_operations.d_compare() taken 7 arguments.
+# LC_SUPEROPS_USE_DENTRY
 #
-AC_DEFUN([LC_D_COMPARE_7ARGS],
-[AC_MSG_CHECKING([if d_compare taken 7 arguments])
-LB_LINUX_TRY_COMPILE([
-       #include <linux/dcache.h>
-],[
-       ((struct dentry_operations*)0)->d_compare(NULL,NULL,NULL,NULL,0,NULL,NULL);
+# 3.3 switchs super_operations to use dentry as parameter (but not vfsmount)
+# see kernel commit 34c80b1d93e6e20ca9dea0baf583a5b5510d92d4
+#
+AC_DEFUN([LC_SUPEROPS_USE_DENTRY], [
+tmp_flags="$EXTRA_KCFLAGS"
+EXTRA_KCFLAGS="-Werror"
+LB_CHECK_COMPILE([if 'super_operations' use 'dentry' as parameter],
+super_ops_dentry, [
+       #include <linux/fs.h>
+       int show_options(struct seq_file *seq, struct dentry *root) {
+               return 0;
+       }
 ],[
-       AC_DEFINE(HAVE_D_COMPARE_7ARGS, 1,
-               [d_compare need 7 arguments])
-       AC_MSG_RESULT([yes])
+       struct super_operations ops;
+       ops.show_options = show_options;
 ],[
-       AC_MSG_RESULT([no])
-])
+       AC_DEFINE(HAVE_SUPEROPS_USE_DENTRY, 1,
+               [super_operations use dentry as parameter])
 ])
+EXTRA_KCFLAGS="$tmp_flags"
+]) # LC_SUPEROPS_USE_DENTRY
 
 #
-# 2.6.38 dentry_operations.d_delete() defined 'const' for 1st parameter.
+# LC_INODEOPS_USE_UMODE_T
 #
-AC_DEFUN([LC_D_DELETE_CONST],
-[AC_MSG_CHECKING([if d_delete has const declare on first parameter])
+# 3.3 switchs inode_operations to use umode_t as parameter (but not int)
+# see kernel commit 1a67aafb5f72a436ca044293309fa7e6351d6a35
+#
+AC_DEFUN([LC_INODEOPS_USE_UMODE_T], [
 tmp_flags="$EXTRA_KCFLAGS"
 EXTRA_KCFLAGS="-Werror"
-LB_LINUX_TRY_COMPILE([
-       #include <linux/dcache.h>
-],[
-       const struct dentry *d = NULL;
-       ((struct dentry_operations*)0)->d_delete(d);
+LB_CHECK_COMPILE([if 'inode_operations' use 'umode_t' as parameter],
+inode_ops_umode_t, [
+       #include <linux/fs.h>
+       #include <linux/types.h>
+       int my_mknod(struct inode *dir, struct dentry *dchild,
+                    umode_t mode, dev_t dev)
+       {
+               return 0;
+       }
 ],[
-       AC_DEFINE(HAVE_D_DELETE_CONST, const,
-               [d_delete first parameter declared const])
-       AC_MSG_RESULT([yes])
+       struct inode_operations ops;
+       ops.mknod = my_mknod;
 ],[
-       AC_DEFINE(HAVE_D_DELETE_CONST, , [])
-       AC_MSG_RESULT([no])
+       AC_DEFINE(HAVE_INODEOPS_USE_UMODE_T, 1,
+               [inode_operations use umode_t as parameter])
 ])
 EXTRA_KCFLAGS="$tmp_flags"
-])
+]) # LC_INODEOPS_USE_UMODE_T
 
 #
-# 2.6.38 dcache_lock removed. rcu-walk commited.
+# LC_KMAP_ATOMIC_HAS_1ARG
 #
-AC_DEFUN([LC_DCACHE_LOCK],
-[AC_MSG_CHECKING([if dcache_lock is exist])
-LB_LINUX_TRY_COMPILE([
-       #include <linux/dcache.h>
-],[
-       spin_lock(&dcache_lock);
+# 3.4 kmap_atomic removes second argument
+# see kernel commit 1ec9c5ddc17aa398f05646abfcbaf315b544e62f
+#
+AC_DEFUN([LC_KMAP_ATOMIC_HAS_1ARG], [
+LB_CHECK_COMPILE([if 'kmap_atomic' has only 1 argument],
+kmap_atomic_1arg, [
+       #include <linux/highmem.h>
 ],[
-       AC_DEFINE(HAVE_DCACHE_LOCK, 1,
-               [dcache_lock is exist])
-       AC_MSG_RESULT([yes])
+       kmap_atomic(NULL);
 ],[
-       AC_MSG_RESULT([no])
-])
+       AC_DEFINE(HAVE_KMAP_ATOMIC_HAS_1ARG, 1,
+               [have kmap_atomic has only 1 argument])
 ])
+]) # LC_KMAP_ATOMIC_HAS_1ARG
 
 #
-# 2.6.38 export blkdev_get_by_dev
+# LC_HAVE_D_MAKE_ROOT
+#
+# 3.4 converts d_alloc_root to d_make_root
+# see kernel commit 32991ab305ace7017c62f8eecbe5eb36dc32e13b
 #
-AC_DEFUN([LC_BLKDEV_GET_BY_DEV],
-[LB_CHECK_SYMBOL_EXPORT([blkdev_get_by_dev],
-[fs/block_dev.c],[
-AC_DEFINE(HAVE_BLKDEV_GET_BY_DEV, 1,
-            [blkdev_get_by_dev is exported by the kernel])
+AC_DEFUN([LC_HAVE_D_MAKE_ROOT], [
+LB_CHECK_COMPILE([if have 'd_make_root'],
+d_make_root, [
+       #include <linux/fs.h>
+],[
+       d_make_root((struct inode *)NULL);
 ],[
+       AC_DEFINE(HAVE_D_MAKE_ROOT, 1,
+               [have d_make_root])
 ])
+]) # LC_HAVE_D_MAKE_ROOT
+
+#
+# LC_HAVE_CACHE_REGISTER
+#
+# 3.4 cache_register/cache_unregister are removed
+# see kernel commit 2c5f846747526e2b83c5f1b8e69016be0e2e87c0
+# Note, since 2.6.37 cache_register_net/cache_unregister_net
+# are defined, but not exported.
+# 3.3 cache_register_net/cache_unregister_net are
+# exported and replacing cache_register/cache_unregister in 3.4
+#
+AC_DEFUN([LC_HAVE_CACHE_REGISTER], [
+LB_CHECK_COMPILE([if have 'cache_register'],
+cache_register, [
+       #include <linux/sunrpc/cache.h>
+],[
+       cache_register(NULL);
+],[
+       AC_DEFINE(HAVE_CACHE_REGISTER, 1,
+               [have cache_register])
 ])
+]) # LC_HAVE_CACHE_REGISTER
 
 #
-# 2.6.38 vfsmount.mnt_count doesn't use atomic_t
+# LC_HAVE_CLEAR_INODE
 #
-# 3.3 starts hiding vfsmount guts series (move from include/linux/mount.h to
-# fs/mount.h, see kernel commit 7d6fec45a5131918b51dcd76da52f2ec86a85be6)
+# 3.5 renames end_writeback() back to clear_inode()...
+# see kernel commit dbd5768f87ff6fb0a4fe09c4d7b6c4a24de99430
 #
-AC_DEFUN([LC_ATOMIC_MNT_COUNT],
-[AC_MSG_CHECKING([if vfsmount guts is hidden, or vfsmount.mnt_count is atomic_t.])
-LB_LINUX_TRY_COMPILE([
+AC_DEFUN([LC_HAVE_CLEAR_INODE], [
+LB_CHECK_COMPILE([if have 'clear_inode'],
+clear_inode, [
        #include <linux/fs.h>
-       #include <../fs/mount.h>
-],[
-       struct mount *mnt =  real_mount((struct vfsmount *)0);
 ],[
-       AC_DEFINE(HAVE_HIDE_VFSMOUNT_GUTS, 1,
-                 [hide vfsmount guts in fs/mount.h])
-       AC_MSG_RESULT([yes, hide vfsmount guts in fs/mount.h])
+       clear_inode((struct inode *)NULL);
 ],[
-       LB_LINUX_TRY_COMPILE([
-               #include <asm/atomic.h>
-               #include <linux/fs.h>
-               #include <linux/mount.h>
-       ],[
-               ((struct vfsmount *)0)->mnt_count = ((atomic_t) { 0 });
-       ],[
-               AC_DEFINE(HAVE_ATOMIC_MNT_COUNT, 1,
-                       [vfsmount.mnt_count is atomic_t])
-               AC_MSG_RESULT([yes, vfsmount.mnt_count is atomic_t])
-       ],[
-               AC_MSG_RESULT([no])
-       ])
-])
+       AC_DEFINE(HAVE_CLEAR_INODE, 1,
+               [have clear_inode])
 ])
+]) # LC_HAVE_CLEAR_INODE
 
 #
-# 2.6.38 use path as 4th parameter in quota_on.
+# LC_HAVE_ENCODE_FH_PARENT
+#
+# 3.5 encode_fh has parent inode passed in directly
+# see kernel commit b0b0382b
 #
-AC_DEFUN([LC_QUOTA_ON_USE_PATH],
-[AC_MSG_CHECKING([quota_on use path as parameter])
+AC_DEFUN([LC_HAVE_ENCODE_FH_PARENT], [
 tmp_flags="$EXTRA_KCFLAGS"
 EXTRA_KCFLAGS="-Werror"
-LB_LINUX_TRY_COMPILE([
-        #include <linux/fs.h>
-        #include <linux/quota.h>
-],[
-        ((struct quotactl_ops *)0)->quota_on(NULL, 0, 0, ((struct path*)0));
+LB_CHECK_COMPILE([if 'encode_fh' have parent inode as parameter],
+encode_fh_parent_inode, [
+       #include <linux/exportfs.h>
+       #include <linux/fs.h>
+       #include <linux/types.h>
+       int ll_encode_fh(struct inode *i, __u32 *a, int *b, struct inode *p)
+       {
+               return 0;
+       }
 ],[
-        AC_DEFINE(HAVE_QUOTA_ON_USE_PATH, 1,
-                [quota_on use path as 4th paramter])
-        AC_MSG_RESULT([yes])
+       struct export_operations exp_op;
+       exp_op.encode_fh = ll_encode_fh;
 ],[
-        AC_MSG_RESULT([no])
+       AC_DEFINE(HAVE_ENCODE_FH_PARENT, 1,
+               [have parent inode as parameter])
 ])
 EXTRA_KCFLAGS="$tmp_flags"
-])
+]) # LC_HAVE_ENCODE_FH_PARENT
 
 #
-# 2.6.38 export simple_setattr
+# LC_FILE_LLSEEK_SIZE_5ARG
 #
-AC_DEFUN([LC_EXPORT_SIMPLE_SETATTR],
-[LB_CHECK_SYMBOL_EXPORT([simple_setattr],
-[fs/libfs.c],[
-AC_DEFINE(HAVE_SIMPLE_SETATTR, 1,
-            [simple_setattr is exported by the kernel])
+# 3.5 has generic_file_llseek_size with 5 args
+#
+AC_DEFUN([LC_FILE_LLSEEK_SIZE_5ARG], [
+LB_CHECK_COMPILE([if Linux kernel has 'generic_file_llseek_size' with 5 args],
+generic_file_llseek_size_5args, [
+       #include <linux/fs.h>
 ],[
+       generic_file_llseek_size(NULL, 0, 0, 0, 0);
+], [
+       AC_DEFINE(HAVE_FILE_LLSEEK_SIZE_5ARGS, 1,
+               [kernel has generic_file_llseek_size with 5 args])
 ])
-])
+]) # LC_FILE_LLSEEK_SIZE_5ARG
 
 #
-# 2.6.39 remove unplug_fn from request_queue.
+# LC_HAVE_DENTRY_D_ALIAS_HLIST
 #
-AC_DEFUN([LC_REQUEST_QUEUE_UNPLUG_FN],
-[AC_MSG_CHECKING([if request_queue has unplug_fn field])
-LB_LINUX_TRY_COMPILE([
-        #include <linux/blkdev.h>
-],[
-        do{ }while(sizeof(((struct request_queue *)0)->unplug_fn));
+# 3.6 switch i_dentry/d_alias from list to hlist
+#
+AC_DEFUN([LC_HAVE_DENTRY_D_ALIAS_HLIST], [
+tmp_flags="$EXTRA_KCFLAGS"
+EXTRA_KCFLAGS="-Werror"
+LB_CHECK_COMPILE([if 'i_dentry/d_alias' uses 'hlist'],
+i_dentry_d_alias_hlist, [
+       #include <linux/fs.h>
+       #include <linux/list.h>
 ],[
-        AC_DEFINE(HAVE_REQUEST_QUEUE_UNPLUG_FN, 1,
-                  [request_queue has unplug_fn field])
-        AC_MSG_RESULT([yes])
+       struct inode inode;
+       struct dentry dentry;
+       struct hlist_head head;
+       struct hlist_node node;
+       inode.i_dentry = head;
+       dentry.d_alias = node;
 ],[
-        AC_MSG_RESULT([no])
-])
+       AC_DEFINE(HAVE_DENTRY_D_ALIAS_HLIST, 1,
+               [have i_dentry/d_alias uses hlist])
 ])
+EXTRA_KCFLAGS="$tmp_flags"
+]) # LC_HAVE_DENTRY_D_ALIAS_HLIST
 
 #
-# 2.6.39 replace get_sb with mount in struct file_system_type
+# LC_DENTRY_OPEN_USE_PATH
+#
+# 3.6 dentry_open uses struct path as first argument
+# see kernel commit 765927b2
 #
-AC_DEFUN([LC_HAVE_FSTYPE_MOUNT],
-[AC_MSG_CHECKING([if file_system_type has mount field])
-LB_LINUX_TRY_COMPILE([
+AC_DEFUN([LC_DENTRY_OPEN_USE_PATH], [
+tmp_flags="$EXTRA_KCFLAGS"
+EXTRA_KCFLAGS="-Werror"
+LB_CHECK_COMPILE([if 'dentry_open' uses 'struct path' as first argument],
+dentry_open_path, [
        #include <linux/fs.h>
+       #include <linux/path.h>
 ],[
-       struct file_system_type fst;
-       void *i = (void *) fst.mount;
-],[
-       AC_DEFINE(HAVE_FSTYPE_MOUNT, 1,
-               [struct file_system_type has mount field])
-       AC_MSG_RESULT([yes])
+       struct path path;
+       dentry_open(&path, 0, NULL);
 ],[
-       AC_MSG_RESULT([no])
-])
+       AC_DEFINE(HAVE_DENTRY_OPEN_USE_PATH, 1,
+               [dentry_open uses struct path as first argument])
 ])
+EXTRA_KCFLAGS="$tmp_flags"
+]) # LC_DENTRY_OPEN_USE_PATH
 
 #
-# 2.6.38 generic_permission taken 4 parameters.
-# in fact, it means rcu-walk aware permission bring.
+# LC_HAVE_IOP_ATOMIC_OPEN
 #
-# 3.1 generic_permission taken 2 parameters.
-# see kernel commit 2830ba7f34ebb27c4e5b8b6ef408cd6d74860890
+# 3.6 vfs adds iop->atomic_open
 #
-AC_DEFUN([LC_GENERIC_PERMISSION],
-[AC_MSG_CHECKING([if generic_permission take 2 or 4 arguments])
-LB_LINUX_TRY_COMPILE([
+AC_DEFUN([LC_HAVE_IOP_ATOMIC_OPEN], [
+LB_CHECK_COMPILE([if 'iop' has 'atomic_open'],
+inode_ops_atomic_open, [
        #include <linux/fs.h>
 ],[
-       generic_permission(NULL, 0);
-],[
-       AC_DEFINE(HAVE_GENERIC_PERMISSION_2ARGS, 1,
-                 [generic_permission taken 2 arguments])
-       AC_MSG_RESULT([yes, 2 args])
+       struct inode_operations iop;
+       iop.atomic_open = NULL;
 ],[
-       LB_LINUX_TRY_COMPILE([
-               #include <linux/fs.h>
-       ],[
-               generic_permission(NULL, 0, 0, NULL);
-       ],[
-               AC_DEFINE(HAVE_GENERIC_PERMISSION_4ARGS, 1,
-                         [generic_permission taken 4 arguments])
-               AC_MSG_RESULT([yes, 4 args])
-       ],[
-               AC_MSG_RESULT([no])
-       ])
-])
+       AC_DEFINE(HAVE_IOP_ATOMIC_OPEN, 1,
+               [have iop atomic_open])
 ])
+]) # LC_HAVE_IOP_ATOMIC_OPEN
 
 #
-# 3.1 renames lock-manager ops(lock_manager_operations) from fl_xxx to lm_xxx
-# see kernel commit 8fb47a4fbf858a164e973b8ea8ef5e83e61f2e50
+# LC_HAVE_POSIXACL_USER_NS
+#
+# 3.7 posix_acl_{to,from}_xattr take struct user_namespace
 #
-AC_DEFUN([LC_LM_XXX_LOCK_MANAGER_OPS],
-[AC_MSG_CHECKING([if lock-manager ops renamed to lm_xxx])
-LB_LINUX_TRY_COMPILE([
+AC_DEFUN([LC_HAVE_POSIXACL_USER_NS], [
+LB_CHECK_COMPILE([if 'posix_acl_to_xattr' takes 'struct user_namespace'],
+posix_acl_to_xattr_user_namespace, [
        #include <linux/fs.h>
+       #include <linux/posix_acl_xattr.h>
 ],[
-       struct lock_manager_operations lm_ops;
-       lm_ops.lm_compare_owner = NULL;
-],[
-       AC_DEFINE(HAVE_LM_XXX_LOCK_MANAGER_OPS, 1,
-                 [lock-manager ops renamed to lm_xxx])
-       AC_MSG_RESULT([yes])
+       posix_acl_to_xattr((struct user_namespace *)NULL, NULL, NULL, 0);
 ],[
-       AC_MSG_RESULT([no])
-])
+       AC_DEFINE(HAVE_POSIXACL_USER_NS, 1,
+               [posix_acl_to_xattr takes struct user_namespace])
 ])
+]) # LC_HAVE_POSIXACL_USER_NS
 
 #
-# 3.1 kills inode->i_alloc_sem, use i_dio_count and inode_dio_wait/
-#     inode_dio_done instead.
-# see kernel commit bd5fe6c5eb9c548d7f07fe8f89a150bb6705e8e3
+# LC_HAVE_FILE_F_INODE
+#
+# 3.8 struct file has new member f_inode
 #
-AC_DEFUN([LC_INODE_DIO_WAIT],
-[AC_MSG_CHECKING([if inode->i_alloc_sem is killed and use inode_dio_wait/done.])
-LB_LINUX_TRY_COMPILE([
+AC_DEFUN([LC_HAVE_FILE_F_INODE], [
+LB_CHECK_COMPILE([if 'struct file' has memeber 'f_inode'],
+file_f_inode, [
        #include <linux/fs.h>
 ],[
-       inode_dio_wait((struct inode *)0);
-       inode_dio_done((struct inode *)0);
-],[
-       AC_DEFINE(HAVE_INODE_DIO_WAIT, 1,
-                 [inode->i_alloc_sem is killed and use inode_dio_wait/done])
-       AC_MSG_RESULT([yes])
+       ((struct file *)0)->f_inode = NULL;
 ],[
-       AC_MSG_RESULT([no])
-])
+       AC_DEFINE(HAVE_FILE_F_INODE, 1,
+               [struct file has memeber f_inode])
 ])
+]) # LC_HAVE_FILE_F_INODE
 
 #
-# 3.1 adds get_acl method to inode_operations to read ACL from disk.
-# see kernel commit 4e34e719e457f2e031297175410fc0bd4016a085
+# LC_HAVE_SUNRPC_UPCALL_HAS_3ARGS
 #
-AC_DEFUN([LC_IOP_GET_ACL],
-[AC_MSG_CHECKING([inode_operations has .get_acl member function])
-LB_LINUX_TRY_COMPILE([
-        #include <linux/fs.h>
+AC_DEFUN([LC_HAVE_SUNRPC_UPCALL_HAS_3ARGS], [
+LB_CHECK_COMPILE([if 'sunrpc_cache_pipe_upcall' takes 3 args],
+sunrpc_cache_pipe_upcall_3args, [
+       #include <linux/sunrpc/cache.h>
 ],[
-        struct inode_operations iop;
-        iop.get_acl = NULL;
+       sunrpc_cache_pipe_upcall(NULL, NULL, NULL);
 ],[
-        AC_DEFINE(HAVE_IOP_GET_ACL, 1,
-                  [inode_operations has .get_acl member function])
-        AC_MSG_RESULT([yes])
-],[
-        AC_MSG_RESULT([no])
-])
+       AC_DEFINE(HAVE_SUNRPC_UPCALL_HAS_3ARGS, 1,
+               [sunrpc_cache_pipe_upcall takes 3 args])
 ])
+]) # LC_HAVE_SUNRPC_UPCALL_HAS_3ARGS
 
 #
-# 3.1.1 has ext4_blocks_for_truncate
+# LC_HAVE_HLIST_FOR_EACH_3ARG
 #
-AC_DEFUN([LC_BLOCKS_FOR_TRUNCATE],
-[AC_MSG_CHECKING([if kernel has ext4_blocks_for_truncate])
-LB_LINUX_TRY_COMPILE([
+# 3.9 uses hlist_for_each_entry with 3 args
+# b67bfe0d42cac56c512dd5da4b1b347a23f4b70a
+#
+AC_DEFUN([LC_HAVE_HLIST_FOR_EACH_3ARG], [
+LB_CHECK_COMPILE([if 'hlist_for_each_entry' has 3 args],
+hlist_for_each_entry_3args, [
+       #include <linux/list.h>
        #include <linux/fs.h>
-       #include "$LINUX/fs/ext4/ext4_jbd2.h"
-       #include "$LINUX/fs/ext4/truncate.h"
-],[
-       ext4_blocks_for_truncate(NULL);
 ],[
-       AC_MSG_RESULT([yes])
-       AC_DEFINE(HAVE_BLOCKS_FOR_TRUNCATE, 1,
-                 [kernel has ext4_blocks_for_truncate])
+       struct inode *inode;
+       struct dentry *dentry;
+       hlist_for_each_entry(dentry, &inode->i_dentry, d_alias) {
+               continue;
+       }
 ],[
-       AC_MSG_RESULT([no])
+       AC_DEFINE(HAVE_HLIST_FOR_EACH_3ARG, 1,
+               [hlist_for_each_entry has 3 args])
 ])
+]) # LC_HAVE_HLIST_FOR_EACH_3ARG
+
+#
+# LC_HAVE_ONLY_PROCFS_SEQ
+#
+# 3.10+ only supports procfs seq_files handling
+#
+AC_DEFUN([LC_HAVE_ONLY_PROCFS_SEQ], [
+LB_CHECK_COMPILE([if procfs only supports using 'seq_files'],
+only_procfs_seq_files, [
+       #include <linux/proc_fs.h>
+],[
+       ((struct proc_dir_entry *)0)->write_proc(NULL, NULL, 0, NULL);
+], [], [
+       AC_DEFINE(HAVE_ONLY_PROCFS_SEQ, 1,
+               [only seq_files supported])
 ])
+]) # LC_HAVE_ONLY_PROCFS_SEQ
 
 #
-# 3.2 request_queue.make_request_fn defined as function returns with void
-# see kernel commit 5a7bbad27a410350e64a2d7f5ec18fc73836c14f
+# LC_BLKDEV_RELEASE_RETURN_INT
 #
-AC_DEFUN([LC_HAVE_VOID_MAKE_REQUEST_FN],
-[AC_MSG_CHECKING([if request_queue.make_request_fn returns void but not int])
-LB_LINUX_TRY_COMPILE([
+# 3.10 release for block device doesn't return int
+#
+AC_DEFUN([LC_BLKDEV_RELEASE_RETURN_INT], [
+LB_CHECK_COMPILE([if 'block_device_operations' release returns 'int'],
+block_device_ops_release_return_int, [
        #include <linux/blkdev.h>
 ],[
-       int ret;
-       make_request_fn         *mrf;
-       ret = mrf(NULL, NULL);
-],[
-       AC_MSG_RESULT([no])
+       struct block_device_operations fops;
+       int i __attribute__ ((unused));
+
+       i = fops.release(NULL, 0);
 ],[
-       AC_DEFINE(HAVE_VOID_MAKE_REQUEST_FN, 1,
-                 [request_queue.make_request_fn returns void but not int])
-       AC_MSG_RESULT([yes])
-])
+       AC_DEFINE(HAVE_BLKDEV_RELEASE_RETURN_INT, 1,
+               [block device release returns int])
 ])
+]) # LC_BLKDEV_RELEASE_RETURN_INT
 
 #
-# 3.2 protects inode->i_nlink from direct modification
-# see kernel commit a78ef704a8dd430225955f0709b22d4a6ba21deb
-# at the same time adds set_nlink(), so checks set_nlink() for it.
+# LC_INVALIDATE_RANGE
+#
+# 3.11 invalidatepage requires the length of the range to invalidate
 #
-AC_DEFUN([LC_HAVE_PROTECT_I_NLINK],
-[AC_MSG_CHECKING([if inode->i_nlink is protected from direct modification])
-LB_LINUX_TRY_COMPILE([
+AC_DEFUN([LC_INVALIDATE_RANGE], [
+LB_CHECK_COMPILE([if 'address_space_operations.invalidatepage' requires 3 arguments],
+address_space_ops_invalidatepage_3args, [
        #include <linux/fs.h>
 ],[
-       struct inode i;
-       set_nlink(&i, 1);
-],[
-       AC_DEFINE(HAVE_PROTECT_I_NLINK, 1,
-                 [inode->i_nlink is protected from direct modification])
-       AC_MSG_RESULT([yes])
+       struct address_space_operations a_ops;
+       a_ops.invalidatepage(NULL, 0, 0);
 ],[
-       AC_MSG_RESULT([no])
-])
+       AC_DEFINE(HAVE_INVALIDATE_RANGE, 1,
+               [address_space_operations.invalidatepage needs 3 arguments])
 ])
+]) # LC_INVALIDATE_RANGE
 
 #
-# 3.3 introduces migrate_mode.h and migratepage has 4 args
+# LC_HAVE_DIR_CONTEXT
 #
-AC_DEFUN([LC_HAVE_MIGRATE_HEADER],
-[LB_CHECK_FILE([$LINUX/include/linux/migrate.h],[
-               AC_DEFINE(HAVE_MIGRATE_H, 1,
-               [kernel has include/linux/migrate.h])
-],[LB_CHECK_FILE([$LINUX/include/linux/migrate_mode.h],[
-               AC_DEFINE(HAVE_MIGRATE_MODE_H, 1,
-                       [kernel has include/linux/migrate_mode.h])
-],[
-       AC_MSG_RESULT([no])
-])
-])
-])
-
-AC_DEFUN([LC_MIGRATEPAGE_4ARGS],
-[AC_MSG_CHECKING([if address_space_operations.migratepage has 4 args])
-LB_LINUX_TRY_COMPILE([
+# 3.11 readdir now takes the new struct dir_context
+#
+AC_DEFUN([LC_HAVE_DIR_CONTEXT], [
+LB_CHECK_COMPILE([if 'dir_context' exist],
+dir_context, [
        #include <linux/fs.h>
-#ifdef HAVE_MIGRATE_H
-       #include <linux/migrate.h>
-#elif defined(HAVE_MIGRATE_MODE_H)
-       #include <linux/migrate_mode.h>
-#endif
 ],[
-       struct address_space_operations aops;
+       struct dir_context ctx;
+       ctx.pos = 0;
+],[
+       AC_DEFINE(HAVE_DIR_CONTEXT, 1,
+               [dir_context exist])
+])
+]) # LC_HAVE_DIR_CONTEXT
 
-       aops.migratepage(NULL, NULL, NULL, MIGRATE_ASYNC);
+#
+# LC_D_COMPARE_5ARGS
+#
+# 3.11 dentry_operations.d_compare() taken 5 arguments.
+#
+AC_DEFUN([LC_D_COMPARE_5ARGS], [
+LB_CHECK_COMPILE([if 'd_compare' taken 5 arguments],
+d_compare_5args, [
+       #include <linux/dcache.h>
 ],[
-       AC_DEFINE(HAVE_MIGRATEPAGE_4ARGS, 1,
-               [address_space_operations.migratepage has 4 args])
-       AC_MSG_RESULT([yes])
+       ((struct dentry_operations*)0)->d_compare(NULL,NULL,0,NULL,NULL);
 ],[
-       AC_MSG_RESULT([no])
-])
+       AC_DEFINE(HAVE_D_COMPARE_5ARGS, 1,
+               [d_compare need 5 arguments])
 ])
+]) # LC_D_COMPARE_5ARGS
 
 #
-# 3.3 switchs super_operations to use dentry as parameter (but not vfsmount)
-# see kernel commit 34c80b1d93e6e20ca9dea0baf583a5b5510d92d4
+# LC_HAVE_DCOUNT
 #
-AC_DEFUN([LC_SUPEROPS_USE_DENTRY],
-[AC_MSG_CHECKING([if super_operations use dentry as parameter])
-tmp_flags="$EXTRA_KCFLAGS"
-EXTRA_KCFLAGS="-Werror"
-LB_LINUX_TRY_COMPILE([
-       #include <linux/fs.h>
-       int show_options(struct seq_file *seq, struct dentry *root){
-               return 0;
-       }
-],[
-       struct super_operations ops;
-       ops.show_options = show_options;
+# 3.11 need to access d_count to get dentry reference count
+#
+AC_DEFUN([LC_HAVE_DCOUNT], [
+LB_CHECK_COMPILE([if 'd_count' exist],
+d_count, [
+       #include <linux/dcache.h>
 ],[
-       AC_DEFINE(HAVE_SUPEROPS_USE_DENTRY, 1,
-                 [super_operations use dentry as parameter])
-       AC_MSG_RESULT([yes])
+       struct dentry de;
+       d_count(&de);
 ],[
-       AC_MSG_RESULT([no])
-])
-EXTRA_KCFLAGS="$tmp_flags"
+       AC_DEFINE(HAVE_D_COUNT, 1,
+               [d_count exist])
 ])
+]) # LC_HAVE_DCOUNT
 
 #
-# 3.3 switchs inode_operations to use umode_t as parameter (but not int)
-# see kernel commit 1a67aafb5f72a436ca044293309fa7e6351d6a35
+# LC_OLDSIZE_TRUNCATE_PAGECACHE
 #
-AC_DEFUN([LC_INODEOPS_USE_UMODE_T],
-[AC_MSG_CHECKING([if inode_operations use umode_t as parameter])
-tmp_flags="$EXTRA_KCFLAGS"
-EXTRA_KCFLAGS="-Werror"
-LB_LINUX_TRY_COMPILE([
-       #include <linux/fs.h>
-       #include <linux/types.h>
-       int my_mknod(struct inode *dir, struct dentry *dchild,
-                    umode_t mode, dev_t dev)
-       {
-               return 0;
-       }
-],[
-       struct inode_operations ops;
-       ops.mknod = my_mknod;
+# 3.12 truncate_pagecache without oldsize parameter
+#
+AC_DEFUN([LC_OLDSIZE_TRUNCATE_PAGECACHE], [
+LB_CHECK_COMPILE([if 'truncate_pagecache' with 'old_size' parameter],
+truncate_pagecache_old_size, [
+       #include <linux/mm.h>
 ],[
-       AC_DEFINE(HAVE_INODEOPS_USE_UMODE_T, 1,
-                 [inode_operations use umode_t as parameter])
-       AC_MSG_RESULT([yes])
+       truncate_pagecache(NULL, 0, 0);
 ],[
-       AC_MSG_RESULT([no])
-])
-EXTRA_KCFLAGS="$tmp_flags"
+       AC_DEFINE(HAVE_OLDSIZE_TRUNCATE_PAGECACHE, 1,
+               [with oldsize])
 ])
+]) # LC_OLDSIZE_TRUNCATE_PAGECACHE
 
-# 3.4 kmap_atomic removes second argument
-# see kernel commit 1ec9c5ddc17aa398f05646abfcbaf315b544e62f
 #
-AC_DEFUN([LC_KMAP_ATOMIC_HAS_1ARG],
-[AC_MSG_CHECKING([if kmap_atomic has only 1 argument])
-LB_LINUX_TRY_COMPILE([
-       #include <linux/highmem.h>
-],[
-       kmap_atomic(NULL);
+# LC_KIOCB_KI_LEFT
+#
+# 3.12 ki_left removed from struct kiocb
+#
+AC_DEFUN([LC_KIOCB_KI_LEFT], [
+LB_CHECK_COMPILE([if 'struct kiocb' with 'ki_left' member],
+kiocb_ki_left, [
+       #include <linux/aio.h>
 ],[
-       AC_DEFINE(HAVE_KMAP_ATOMIC_HAS_1ARG, 1,
-                 [have kmap_atomic has only 1 argument])
-       AC_MSG_RESULT([yes])
+       ((struct kiocb*)0)->ki_left = 0;
 ],[
-       AC_MSG_RESULT([no])
-])
+       AC_DEFINE(HAVE_KIOCB_KI_LEFT, 1,
+               [ki_left exist])
 ])
+]) # LC_KIOCB_KI_LEFT
 
 #
-# 3.4 switchs touch_atime to struct path
-# see kernel commit 68ac1234fb949b66941d94dce4157742799fc581
+# LC_VFS_RENAME_5ARGS
 #
-AC_DEFUN([LC_TOUCH_ATIME_1ARG],
-[AC_MSG_CHECKING([if touch_atime use one argument])
-LB_LINUX_TRY_COMPILE([
+# 3.13 has vfs_renane with 5 args
+#
+AC_DEFUN([LC_VFS_RENAME_5ARGS], [
+LB_CHECK_COMPILE([if Linux kernel has 'vfs_rename' with 5 args],
+vfs_rename_5args, [
        #include <linux/fs.h>
 ],[
-       touch_atime((struct path *)NULL);
-],[
-       AC_DEFINE(HAVE_TOUCH_ATIME_1ARG, 1,
-                 [touch_atime use one argument])
-       AC_MSG_RESULT([yes])
-],[
-       AC_MSG_RESULT([no])
-])
+       vfs_rename(NULL, NULL, NULL, NULL, NULL);
+], [
+       AC_DEFINE(HAVE_VFS_RENAME_5ARGS, 1,
+               [kernel has vfs_rename with 5 args])
 ])
+]) # LC_VFS_RENAME_5ARGS
 
 #
-# 3.4 converts d_alloc_root to d_make_root
-# see kernel commit 32991ab305ace7017c62f8eecbe5eb36dc32e13b
+# LC_VFS_UNLINK_3ARGS
 #
-AC_DEFUN([LC_HAVE_D_MAKE_ROOT],
-[AC_MSG_CHECKING([if have d_make_root])
-LB_LINUX_TRY_COMPILE([
+# 3.13 has vfs_renane with 3 args
+#
+AC_DEFUN([LC_VFS_UNLINK_3ARGS], [
+LB_CHECK_COMPILE([if Linux kernel has 'vfs_unlink' with 3 args],
+vfs_unlink_3args, [
        #include <linux/fs.h>
 ],[
-       d_make_root((struct inode *)NULL);
-],[
-       AC_DEFINE(HAVE_D_MAKE_ROOT, 1,
-                 [have d_make_root])
-       AC_MSG_RESULT([yes])
-],[
-       AC_MSG_RESULT([no])
-])
+       vfs_unlink(NULL, NULL, NULL);
+], [
+       AC_DEFINE(HAVE_VFS_UNLINK_3ARGS, 1,
+               [kernel has vfs_unlink with 3 args])
 ])
+]) # LC_VFS_UNLINK_3ARGS
 
 #
 # LC_PROG_LINUX
 #
 # Lustre linux kernel checks
 #
-AC_DEFUN([LC_PROG_LINUX],
-         [
-         LC_CONFIG_PINGER
-         LC_CONFIG_CHECKSUM
-         LC_CONFIG_LIBLUSTRE_RECOVERY
-         LC_CONFIG_HEALTH_CHECK_WRITE
-         LC_CONFIG_LRU_RESIZE
-         LC_LLITE_LLOOP_MODULE
-
-         # RHEL4 patches
-         LC_EXPORT_TRUNCATE_COMPLETE
-         LC_EXPORT_D_REHASH_COND
-         LC_EXPORT___D_REHASH
-         LC_EXPORT_NODE_TO_CPUMASK
-
-         LC_FILEMAP_POPULATE
-         LC_BIT_SPINLOCK_H
-
-         LC_CONST_ACL_SIZE
-
-         LC_CAPA_CRYPTO
-         LC_CONFIG_RMTCLIENT
-         LC_CONFIG_GSS
-         LC_TASK_CLENV_STORE
-
-         # 2.6.12
-         LC_RW_TREE_LOCK
-
-         # 2.6.18
-         LC_UMOUNTBEGIN_HAS_VFSMOUNT
-
-         #2.6.18 + RHEL5 (fc6)
-         LC_LINUX_FIEMAP_H
-
-         # 2.6.19
-         LC_FILE_WRITEV
-         LC_FILE_READV
-
-         # 2.6.20
-         LC_CANCEL_DIRTY_PAGE
-
-         # raid5-zerocopy patch
-         LC_PAGE_CONSTANT
-
-        # 2.6.22
-         LC_INVALIDATE_BDEV_2ARG
-         LC_ASYNC_BLOCK_CIPHER
-         LC_STRUCT_HASH_DESC
-         LC_STRUCT_BLKCIPHER_DESC
-         LC_FS_RENAME_DOES_D_MOVE
-
-         # 2.6.23
-         LC_UNREGISTER_BLKDEV_RETURN_INT
-         LC_KERNEL_SPLICE_READ
-         LC_KERNEL_SENDFILE
-         LC_HAVE_EXPORTFS_H
-         LC_VM_OP_FAULT
-         LC_PROCFS_USERS
-         LC_EXPORTFS_DECODE_FH
-
-         # 2.6.24
-         LC_HAVE_MMTYPES_H
-         LC_BIO_ENDIO_2ARG
-         LC_FH_TO_DENTRY
-         LC_PROCFS_DELETED
-         LC_EXPORT_BDI_INIT
-
-         # 2.6.26
-         LC_FS_STRUCT_USE_PATH
-
-         # 2.6.27
-         LC_SECURITY_PLUG  # for SLES10 SP2
-         LC_PGMKWRITE_USE_VMFAULT
-        LC_PGMKWRITE_COMPACT
-         LC_INODE_PERMISION_2ARGS
-         LC_TRYLOCKPAGE
-         LC_READ_INODE_IN_SBOPS
-         LC_EXPORT_INODE_PERMISSION
-         LC_QUOTA_ON_5ARGS
-         LC_QUOTA_OFF_3ARGS
-         LC_VFS_DQ_OFF
-         LC_LOCK_MAP_ACQUIRE
-
-         # 2.6.27.15-2 sles11
-         LC_BI_HW_SEGMENTS
-         LC_HAVE_QUOTAIO_H
-         LC_BDI_NAME
-         LC_SB_ANY_QUOTA_ACTIVE
-         LC_SB_HAS_QUOTA_ACTIVE
-         LC_EXPORT_ADD_TO_PAGE_CACHE_LRU
-
-         # 2.6.29
-         LC_SB_ANY_QUOTA_LOADED
-
-         # 2.6.30
-         LC_EXPORT_CPUMASK_OF_NODE
-
-         # 2.6.31
-         LC_BLK_QUEUE_LOG_BLK_SIZE
-
-         # 2.6.32
-         LC_REQUEST_QUEUE_LIMITS
-         LC_EXPORT_BDI_REGISTER
-         LC_SB_BDI
-         LC_BLK_QUEUE_MAX_SECTORS
-         LC_BLK_QUEUE_MAX_SEGMENTS
-         LC_SET_CPUS_ALLOWED
-         LC_CACHE_UPCALL
-         LC_EXPORT_GENERIC_ERROR_REMOVE_PAGE
-         LC_SELINUX_IS_ENABLED
-         LC_EXPORT_ACCESS_PROCESS_VM
-        LC_VFS_INODE_NEWSIZE_OK
-
-         # 2.6.35, 3.0.0
-         LC_FILE_FSYNC
-         LC_EXPORT_SIMPLE_SETATTR
-
-         # 2.6.36
-         LC_FS_STRUCT_RWLOCK
-         LC_SBOPS_EVICT_INODE
-
-         # 2.6.37
-         LC_KERNEL_LOCKED
-
-         # 2.6.38
-         LC_ATOMIC_MNT_COUNT
-         LC_BLKDEV_GET_BY_DEV
-         LC_GENERIC_PERMISSION
-         LC_QUOTA_ON_USE_PATH
-         LC_DCACHE_LOCK
-         LC_D_COMPARE_7ARGS
-         LC_D_DELETE_CONST
-
-         # 2.6.39
-         LC_REQUEST_QUEUE_UNPLUG_FN
-        LC_HAVE_FSTYPE_MOUNT
-
-        # 3.1
-        LC_LM_XXX_LOCK_MANAGER_OPS
-        LC_INODE_DIO_WAIT
-        LC_IOP_GET_ACL
-
-        # 3.1.1
-        LC_BLOCKS_FOR_TRUNCATE
-
-        # 3.2
-        LC_HAVE_VOID_MAKE_REQUEST_FN
-        LC_HAVE_PROTECT_I_NLINK
-
-        # 3.3
-        LC_HAVE_MIGRATE_HEADER
-        LC_MIGRATEPAGE_4ARGS
-        LC_SUPEROPS_USE_DENTRY
-        LC_INODEOPS_USE_UMODE_T
-
-        # 3.4
-        LC_TOUCH_ATIME_1ARG
-        LC_HAVE_D_MAKE_ROOT
-        LC_KMAP_ATOMIC_HAS_1ARG
-
-        #
-        if test x$enable_server = xyes ; then
-               AC_DEFINE(HAVE_SERVER_SUPPORT, 1, [support server])
+AC_DEFUN([LC_PROG_LINUX], [
+       AC_MSG_NOTICE([Lustre kernel checks
+==============================================================================])
+
+       LC_CONFIG_PINGER
+       LC_CONFIG_CHECKSUM
+       LC_CONFIG_LIBLUSTRE_RECOVERY
+       LC_CONFIG_HEALTH_CHECK_WRITE
+       LC_CONFIG_LRU_RESIZE
+       LC_LLITE_LLOOP_MODULE
+
+       LC_GLIBC_SUPPORT_FHANDLES
+       LC_CAPA_CRYPTO
+       LC_CONFIG_RMTCLIENT
+       LC_CONFIG_GSS
+
+       # 2.6.32
+       LC_BLK_QUEUE_MAX_SEGMENTS
+
+       # 2.6.34
+       LC_HAVE_DQUOT_FS_DISK_QUOTA
+       LC_HAVE_DQUOT_SUSPEND
+
+       # 2.6.35, 3.0.0
+       LC_FILE_FSYNC
+       LC_EXPORT_SIMPLE_SETATTR
+       LC_EXPORT_TRUNCATE_COMPLETE_PAGE
+
+       # 2.6.36
+       LC_FS_STRUCT_RWLOCK
+       LC_SBOPS_EVICT_INODE
+
+       # 2.6.37
+       LC_KERNEL_LOCKED
+
+       # 2.6.38
+       LC_BLKDEV_GET_BY_DEV
+       LC_GENERIC_PERMISSION
+       LC_DCACHE_LOCK
+       LC_INODE_I_RCU
+       LC_D_COMPARE_7ARGS
+       LC_D_DELETE_CONST
+
+       # 2.6.39
+       LC_REQUEST_QUEUE_UNPLUG_FN
+       LC_HAVE_FHANDLE_SYSCALLS
+       LC_HAVE_FSTYPE_MOUNT
+       LC_IOP_TRUNCATE
+       LC_HAVE_INODE_OWNER_OR_CAPABLE
+
+       # 3.0
+       LC_DIRTY_INODE_WITH_FLAG
+
+       # 3.1
+       LC_LM_XXX_LOCK_MANAGER_OPS
+       LC_INODE_DIO_WAIT
+       LC_IOP_GET_ACL
+       LC_FILE_LLSEEK_SIZE
+       LC_INODE_PERMISION_2ARGS
+
+       # 3.2
+       LC_HAVE_VOID_MAKE_REQUEST_FN
+       LC_HAVE_PROTECT_I_NLINK
+
+       # 3.3
+       LC_HAVE_MIGRATE_HEADER
+       LC_MIGRATEPAGE_4ARGS
+       LC_SUPEROPS_USE_DENTRY
+       LC_INODEOPS_USE_UMODE_T
+       LC_HAVE_CACHE_REGISTER
+
+       # 3.4
+       LC_HAVE_D_MAKE_ROOT
+       LC_KMAP_ATOMIC_HAS_1ARG
+
+       # 3.5
+       LC_HAVE_CLEAR_INODE
+       LC_HAVE_ENCODE_FH_PARENT
+       LC_FILE_LLSEEK_SIZE_5ARG
+
+       # 3.6
+       LC_HAVE_DENTRY_D_ALIAS_HLIST
+       LC_DENTRY_OPEN_USE_PATH
+       LC_HAVE_IOP_ATOMIC_OPEN
+
+       # 3.7
+       LC_HAVE_POSIXACL_USER_NS
+
+       # 3.8
+       LC_HAVE_FILE_F_INODE
+       LC_HAVE_SUNRPC_UPCALL_HAS_3ARGS
+
+       # 3.9
+       LC_HAVE_HLIST_FOR_EACH_3ARG
+
+       # 3.10
+       LC_HAVE_ONLY_PROCFS_SEQ
+       LC_BLKDEV_RELEASE_RETURN_INT
+
+       # 3.11
+       LC_INVALIDATE_RANGE
+       LC_HAVE_DIR_CONTEXT
+       LC_D_COMPARE_5ARGS
+       LC_HAVE_DCOUNT
+
+       # 3.12
+       LC_OLDSIZE_TRUNCATE_PAGECACHE
+       LC_KIOCB_KI_LEFT
+
+       # 3.13
+       LC_VFS_RENAME_5ARGS
+       LC_VFS_UNLINK_3ARGS
+
+       #
+       AS_IF([test "x$enable_server" != xno], [
                LC_FUNC_DEV_SET_RDONLY
                LC_STACK_SIZE
                LC_QUOTA64
                LC_QUOTA_CONFIG
-        fi
-])
+       ])
+]) # LC_PROG_LINUX
 
 #
-# LC_CONFIG_CLIENT_SERVER
+# LC_CONFIG_CLIENT
 #
-# Build client/server sides of Lustre
+# Check whether to build the client side of Lustre
 #
-AC_DEFUN([LC_CONFIG_CLIENT_SERVER],
-[AC_MSG_CHECKING([whether to build Lustre server support])
-AC_ARG_ENABLE([server],
-       AC_HELP_STRING([--disable-server],
-                       [disable Lustre server support]),
-       [],[enable_server='yes'])
-AC_MSG_RESULT([$enable_server])
-
+AC_DEFUN([LC_CONFIG_CLIENT], [
 AC_MSG_CHECKING([whether to build Lustre client support])
 AC_ARG_ENABLE([client],
        AC_HELP_STRING([--disable-client],
-                       [disable Lustre client support]),
-       [],[enable_client='yes'])
-AC_MSG_RESULT([$enable_client])])
+               [disable Lustre client support]),
+       [], [enable_client="yes"])
+AC_MSG_RESULT([$enable_client])
+]) # LC_CONFIG_CLIENT
 
 #
 # LC_CONFIG_LIBLUSTRE
 #
 # whether to build liblustre
 #
-AC_DEFUN([LC_CONFIG_LIBLUSTRE],
-[AC_MSG_CHECKING([whether to build Lustre library])
+AC_DEFUN([LC_CONFIG_LIBLUSTRE], [
+AC_MSG_CHECKING([whether to build Lustre library])
 AC_ARG_ENABLE([liblustre],
-       AC_HELP_STRING([--disable-liblustre],
-                       [disable building of Lustre library]),
-       [],[enable_liblustre=$with_sysio])
+       AC_HELP_STRING([--enable-liblustre],
+               [enable building of Lustre library]),
+       [], [])
 AC_MSG_RESULT([$enable_liblustre])
+
 # only build sysio if liblustre is built
 with_sysio="$enable_liblustre"
 
 AC_MSG_CHECKING([whether to build liblustre tests])
 AC_ARG_ENABLE([liblustre-tests],
        AC_HELP_STRING([--enable-liblustre-tests],
-                       [enable liblustre tests, if --disable-tests is used]),
-       [],[enable_liblustre_tests=$enable_tests])
-if test x$enable_liblustre != xyes ; then
-   enable_liblustre_tests='no'
-fi
+               [enable liblustre tests, if --disable-tests is used]),
+       [], [enable_liblustre_tests=$enable_tests])
+AS_IF([test "x$enable_liblustre" != xyes], [enable_liblustre_tests="no"])
 AC_MSG_RESULT([$enable_liblustre_tests])
 
 AC_MSG_CHECKING([whether to enable liblustre acl])
 AC_ARG_ENABLE([liblustre-acl],
        AC_HELP_STRING([--disable-liblustre-acl],
-                       [disable ACL support for liblustre]),
-       [],[enable_liblustre_acl=yes])
+               [disable ACL support for liblustre]),
+       [], [enable_liblustre_acl="yes"])
 AC_MSG_RESULT([$enable_liblustre_acl])
-if test x$enable_liblustre_acl = xyes ; then
-  AC_DEFINE(LIBLUSTRE_POSIX_ACL, 1, Liblustre Support ACL-enabled MDS)
-fi
-
-# 2.6.29 change prepare/commit_write to write_begin/end
-AC_DEFUN([LC_WRITE_BEGIN_END],
-[AC_MSG_CHECKING([if kernel has .write_begin/end])
-LB_LINUX_TRY_COMPILE([
-        #include <linux/fs.h>
-        #include <linux/pagemap.h>
-#ifdef HAVE_LINUX_MMTYPES_H
-        #include <linux/mm_types.h>
-#endif
-],[
-        struct address_space_operations aops;
-        struct page *page;
-
-        aops.write_begin = NULL;
-        aops.write_end = NULL;
-        page = grab_cache_page_write_begin(NULL, 0, 0);
-], [
-        AC_MSG_RESULT([yes])
-        AC_DEFINE(HAVE_KERNEL_WRITE_BEGIN_END, 1,
-                [kernel has .write_begin/end])
-],[
-        AC_MSG_RESULT([no])
-])
-])
-
-# 2.6.29 blkdev_put has 2 arguments
-AC_DEFUN([LC_BLKDEV_PUT_2ARGS],
-[AC_MSG_CHECKING([blkdev_put needs 2 parameters])
-LB_LINUX_TRY_COMPILE([
-        #include <linux/fs.h>
-],[
-        blkdev_put(NULL, 0);
-],[
-        AC_DEFINE(HAVE_BLKDEV_PUT_2ARGS, 1,
-                [blkdev_put needs 2 paramters])
-        AC_MSG_RESULT([yes])
-],[
-        AC_MSG_RESULT([no])
-])
-])
-
-# 2.6.29 dentry_open has 4 arguments
-AC_DEFUN([LC_DENTRY_OPEN_4ARGS],
-[AC_MSG_CHECKING([dentry_open needs 4 parameters])
-LB_LINUX_TRY_COMPILE([
-        #include <linux/fs.h>
-],[
-        dentry_open(NULL, NULL, 0, NULL);
-],[
-        AC_DEFINE(HAVE_DENTRY_OPEN_4ARGS, 1,
-                [dentry_open needs 4 paramters])
-        AC_MSG_RESULT([yes])
-],[
-        AC_MSG_RESULT([no])
-])
-])
-
-# 2.6.29 split file and anonymous page queues
-AC_DEFUN([LC_PAGEVEC_LRU_ADD_FILE],
-[AC_MSG_CHECKING([if kernel has .pagevec_lru_add_file])
-LB_LINUX_TRY_COMPILE([
-        #include <linux/mm.h>
-        #include <linux/pagevec.h>
-],[
-        struct pagevec lru_pagevec;
 
-        pagevec_init(&lru_pagevec, 0);
-        pagevec_lru_add_file(&lru_pagevec);
-],[
-        AC_MSG_RESULT([yes])
-        AC_DEFINE(HAVE_PAGEVEC_LRU_ADD_FILE, 1,
-                [kernel has .pagevec_lru_add_file])
-],[
-        AC_MSG_RESULT([no])
-])
-])
+AS_IF([test "x$enable_liblustre_acl" = xyes],
+       [AC_DEFINE(LIBLUSTRE_POSIX_ACL, 1,
+               [Liblustre Support ACL-enabled MDS])])
 
 #
 # --enable-mpitest
 #
 AC_ARG_ENABLE(mpitests,
        AC_HELP_STRING([--enable-mpitests=yes|no|mpicc wrapper],
-                           [include mpi tests]),
+               [include mpi tests]),
        [
-        enable_mpitests=yes
-         case $enableval in
-         yes)
+       enable_mpitests="yes"
+       case $enableval in
+       yes)
                MPICC_WRAPPER=mpicc
                ;;
-         no)
+       no)
                enable_mpitests=no
                ;;
-         *)
+       *)
                MPICC_WRAPPER=$enableval
-                 ;;
-        esac
-       ],
-       [
+               ;;
+       esac
+       ], [
        MPICC_WRAPPER=mpicc
        enable_mpitests=yes
-       ]
-)
+       ])
 
-if test x$enable_mpitests != xno; then
-       AC_MSG_CHECKING([whether mpitests can be built])
+AS_IF([test "x$enable_mpitests" != xno], [
        oldcc=$CC
        CC=$MPICC_WRAPPER
-       AC_LINK_IFELSE(
-           [AC_LANG_PROGRAM([[
-                   #include <mpi.h>
-               ]],[[
-                   int flag;
-                   MPI_Initialized(&flag);
-               ]])],
-           [
-                   AC_MSG_RESULT([yes])
-           ],[
-                   AC_MSG_RESULT([no])
-                   enable_mpitests=no
+       AC_MSG_CHECKING([whether mpitests can be built])
+       AC_LINK_IFELSE([
+               AC_LANG_PROGRAM([[
+                       #include <mpi.h>
+               ]],[[
+                       int flag;
+                       MPI_Initialized(&flag);
+               ]])
+       ], [
+               AC_MSG_RESULT([yes])
+       ], [
+               AC_MSG_RESULT([no])
+               enable_mpitests=no
        ])
        CC=$oldcc
-fi
+])
 AC_SUBST(MPICC_WRAPPER)
 
 AC_MSG_NOTICE([Enabling Lustre configure options for libsysio])
@@ -2431,129 +1700,139 @@ LC_CONFIG_LIBLUSTRE_RECOVERY
 #
 # whether to enable quota support global control
 #
-AC_DEFUN([LC_CONFIG_QUOTA],
-[AC_ARG_ENABLE([quota],
+AC_DEFUN([LC_CONFIG_QUOTA], [
+AC_MSG_CHECKING([whether to enable quota support global control])
+AC_ARG_ENABLE([quota],
        AC_HELP_STRING([--enable-quota],
-                       [enable quota support]),
-       [],[enable_quota='yes'])
-])
+               [enable quota support]),
+       [], [enable_quota="yes"])
+AS_IF([test "x$enable_quota" = xyes],
+       [AC_MSG_RESULT([yes])],
+       [AC_MSG_RESULT([no])])
+]) # LC_CONFIG_QUOTA
 
-AC_DEFUN([LC_QUOTA],
-[#check global
+#
+# LC_QUOTA
+#
+AC_DEFUN([LC_QUOTA], [
+#check global
 LC_CONFIG_QUOTA
 #check for utils
-AC_CHECK_HEADER(sys/quota.h,
-                [AC_DEFINE(HAVE_SYS_QUOTA_H, 1, [Define to 1 if you have <sys/quota.h>.])],
-                [AC_MSG_ERROR([don't find <sys/quota.h> in your system])])
+AS_IF([test "x$enable_quota" != xno -a "x$enable_utils" != xno], [
+       AC_CHECK_HEADER([sys/quota.h],
+               [AC_DEFINE(HAVE_SYS_QUOTA_H, 1,
+                       [Define to 1 if you have <sys/quota.h>.])],
+               [AC_MSG_ERROR([don't find <sys/quota.h> in your system])])
 ])
+]) # LC_QUOTA
 
 #
 # LC_CONFIG_SPLIT
 #
 # whether to enable split support
 #
-AC_DEFUN([LC_CONFIG_SPLIT],
-[AC_MSG_CHECKING([whether to enable split support])
+AC_DEFUN([LC_CONFIG_SPLIT], [
+AC_MSG_CHECKING([whether to enable split support])
 AC_ARG_ENABLE([split],
        AC_HELP_STRING([--enable-split],
-                       [enable split support]),
-       [],[enable_split='no'])
+               [enable split support]),
+       [], [enable_split='no'])
 AC_MSG_RESULT([$enable_split])
-if test x$enable_split != xno; then
-   AC_DEFINE(HAVE_SPLIT_SUPPORT, 1, [enable split support])
-fi
-])
+AS_IF([test "x$enable_split" != xno],
+    [AC_DEFINE(HAVE_SPLIT_SUPPORT, 1, [enable split support])])
+]) # LC_CONFIG_SPLIT
 
-# RHEL5(2.6.18) has tux_info
-AC_DEFUN([LC_TASK_CLENV_TUX_INFO],
-[AC_MSG_CHECKING([tux_info])
-LB_LINUX_TRY_COMPILE([
-        #include <linux/sched.h>
-],[
-        struct task_struct task;
-        &task.tux_info;
-],[
-        AC_MSG_RESULT([yes])
-        AC_DEFINE(LL_TASK_CL_ENV, tux_info, [have tux_info])
-        have_task_clenv_store='yes'
-],[
-        AC_MSG_RESULT([no])
-])
-])
+#
+# LC_CONFIG_NODEMAP_PROC_DEBUG
+#
+# enable nodemap proc file debugging
+#
+AC_DEFUN([LC_NODEMAP_PROC_DEBUG], [
+AC_MSG_CHECKING([whether to enable nodemap proc debug])
+AC_ARG_ENABLE([nodemap_proc_debug],
+       AC_HELP_STRING([--enable-nodemap-proc-debug],
+               [enable nodemap proc debug]),
+       [], [enable_nodemap_proc_debug="no"])
+AC_MSG_RESULT([$enable_nodemap_proc_debug])
+AS_IF([test "x$enable_nodemap_proc_debug" != xno],
+       [AC_DEFINE(NODEMAP_PROC_DEBUG, 1,
+               [enable nodemap proc debug support])])
+]) # LC_NODEMAP_PROC_DEBUG
 
 #
 # LC_LLITE_LLOOP_MODULE
+#
 # lloop_llite.ko does not currently work with page sizes
 # of 64k or larger.
 #
-AC_DEFUN([LC_LLITE_LLOOP_MODULE],
-[AC_MSG_CHECKING([whether to enable llite_lloop module])
-LB_LINUX_TRY_COMPILE([
-        #include <asm/page.h>
-],[
-        #if PAGE_SIZE >= 65536
-        #error "PAGE_SIZE >= 65536"
-        #endif
+AC_DEFUN([LC_LLITE_LLOOP_MODULE], [
+LB_CHECK_COMPILE([whether to enable 'llite_lloop' module],
+enable_llite_lloop_module, [
+       #include <asm/page.h>
 ],[
-        enable_llite_lloop_module='yes'
-        AC_MSG_RESULT([yes])
-],[
-        enable_llite_lloop_module='no'
-        AC_MSG_RESULT([no])
-])
-])
+       #if PAGE_SIZE >= 65536
+       #error "PAGE_SIZE >= 65536"
+       #endif
+],
+       [enable_llite_lloop_module="yes"],
+       [enable_llite_lloop_module="no"])
+]) # LC_LLITE_LLOOP_MODULE
 
 #
 # LC_OSD_ADDON
 #
 # configure support for optional OSD implementation
 #
-AC_DEFUN([LC_OSD_ADDON],
-[AC_MSG_CHECKING([for osd])
+AC_DEFUN([LC_OSD_ADDON], [
+AC_MSG_CHECKING([whether to use OSD addon])
 AC_ARG_WITH([osd],
        AC_HELP_STRING([--with-osd=path],
-                       [set path to optional osd]),
-        [
-               case $with_osd in
-                       no)     ENABLEOSDADDON=0
-                               ;;
-                       *)      OSDADDON="${with_osd}"
-                               ENABLEOSDADDON=1
-                               ;;
-               esac
+               [set path to optional osd]),
+       [
+       case "$with_osd" in
+       no)
+               ENABLEOSDADDON=0
+               ;;
+       *)
+               OSDADDON="$with_osd"
+               ENABLEOSDADDON=1
+               ;;
+       esac
        ], [
                ENABLEOSDADDON=0
        ])
-if test $ENABLEOSDADDON -eq 0; then
+AS_IF([test $ENABLEOSDADDON -eq 0], [
        AC_MSG_RESULT([no])
-       OSDADDON=
-else
-       OSDMODNAME=`basename $OSDADDON`
-       if test -e $LUSTRE/$OSDMODNAME; then
+       OSDADDON=""
+], [
+       OSDMODNAME=$(basename $OSDADDON)
+       AS_IF([test -e $LUSTRE/$OSDMODNAME], [
                AC_MSG_RESULT([can't link])
-               OSDADDON=
-       elif ln -s $OSDADDON $LUSTRE/$OSDMODNAME; then
+               OSDADDON=""
+       ], [ln -s $OSDADDON $LUSTRE/$OSDMODNAME], [
                AC_MSG_RESULT([$OSDMODNAME])
                OSDADDON="subdir-m += $OSDMODNAME"
-       else
+       ], [
                AC_MSG_RESULT([can't link])
-               OSDADDON=
-       fi
-fi
-AC_SUBST(OSDADDON)
+               OSDADDON=""
+       ])
 ])
+AC_SUBST(OSDADDON)
+]) # LC_OSD_ADDON
 
 #
 # LC_CONFIGURE
 #
 # other configure checks
 #
-AC_DEFUN([LC_CONFIGURE],
-[LC_CONFIG_OBD_BUFFER_SIZE
+AC_DEFUN([LC_CONFIGURE], [
+AC_MSG_NOTICE([Lustre core checks
+==============================================================================])
 
-if test $target_cpu == "i686" -o $target_cpu == "x86_64"; then
-        CFLAGS="$CFLAGS -Werror"
-fi
+LC_CONFIG_OBD_BUFFER_SIZE
+
+AS_IF([test $target_cpu == "i686" -o $target_cpu == "x86_64"],
+       [CFLAGS="$CFLAGS -Werror"])
 
 # maximum MDS thread count
 LC_MDS_MAX_THREADS
@@ -2574,97 +1853,112 @@ AC_CHECK_FUNCS([inet_ntoa])
 # libsysio/src/readlink.c
 LC_READLINK_SSIZE_T
 
-# lvfs/prng.c - depends on linux/types.h from liblustre/dir.c
+# libcfs prng.c - depends on linux/types.h from liblustre/dir.c
 AC_CHECK_HEADERS([linux/random.h], [], [],
-                 [#ifdef HAVE_LINUX_TYPES_H
-                  # include <linux/types.h>
-                  #endif
-                 ])
+                [#ifdef HAVE_LINUX_TYPES_H
+                 #include <linux/types.h>
+                 #endif
+                ])
 
 # utils/llverfs.c
 AC_CHECK_HEADERS([ext2fs/ext2fs.h])
 
 # check for -lz support
 ZLIB=""
-AC_CHECK_LIB([z],
-             [adler32],
-             [AC_CHECK_HEADERS([zlib.h],
-                               [ZLIB="-lz"
-                                AC_DEFINE([HAVE_ADLER], 1,
-                                          [support alder32 checksum type])],
-                               [AC_MSG_WARN([No zlib-devel package found,
-                                             unable to use adler32 checksum])])],
-             [AC_MSG_WARN([No zlib package found, unable to use adler32 checksum])]
-)
+AC_CHECK_LIB([z], [adler32],
+       [AC_CHECK_HEADERS([zlib.h], [
+               ZLIB="-lz"
+               AC_DEFINE([HAVE_ADLER], 1,
+                       [support alder32 checksum type])
+       ], [
+               AC_MSG_WARN([
+
+No zlib-devel package found, unable to use adler32 checksum
+])
+])], [
+       AC_MSG_WARN([
+
+No zlib package found, unable to use adler32 checksum
+])
+])
 AC_SUBST(ZLIB)
 
+SELINUX=""
+AC_CHECK_LIB([selinux], [is_selinux_enabled],
+       [AC_CHECK_HEADERS([selinux.h],
+                       [SELINUX="-lselinux"
+                       AC_DEFINE([HAVE_SELINUX], 1,
+                               [support for selinux ])],
+                       [AC_MSG_WARN([
+
+No selinux-devel package found, unable to build selinux enabled tools
+])
+])],
+       [AC_MSG_WARN([
+
+No selinux package found, unable to build selinux enabled tools
+])
+])
+AC_SUBST(SELINUX)
+
 # Super safe df
+AC_MSG_CHECKING([whether to report minimum OST free space])
 AC_ARG_ENABLE([mindf],
-      AC_HELP_STRING([--enable-mindf],
-                      [Make statfs report the minimum available space on any single OST instead of the sum of free space on all OSTs]),
-      [],[])
-if test "$enable_mindf" = "yes" ;  then
-      AC_DEFINE([MIN_DF], 1, [Report minimum OST free space])
-fi
+       AC_HELP_STRING([--enable-mindf],
+               [Make statfs report the minimum available space on any single OST instead of the sum of free space on all OSTs]),
+       [], [enable_mindf="no"])
+AC_MSG_RESULT([$enable_mindf])
+AS_IF([test "$enable_mindf" = "yes"],
+       [AC_DEFINE([MIN_DF], 1, [Report minimum OST free space])])
 
-AC_ARG_ENABLE([fail_alloc],
-        AC_HELP_STRING([--disable-fail-alloc],
-                [disable randomly alloc failure]),
-        [],[enable_fail_alloc=yes])
 AC_MSG_CHECKING([whether to randomly failing memory alloc])
+AC_ARG_ENABLE([fail_alloc],
+       AC_HELP_STRING([--disable-fail-alloc],
+               [disable randomly alloc failure]),
+       [], [enable_fail_alloc="yes"])
 AC_MSG_RESULT([$enable_fail_alloc])
-if test x$enable_fail_alloc != xno ; then
-        AC_DEFINE([RANDOM_FAIL_ALLOC], 1, [enable randomly alloc failure])
-fi
+AS_IF([test "x$enable_fail_alloc" != xno],
+       [AC_DEFINE([RANDOM_FAIL_ALLOC], 1,
+               [enable randomly alloc failure])])
 
-AC_ARG_ENABLE([invariants],
-        AC_HELP_STRING([--enable-invariants],
-                [enable invariant checking (cpu intensive)]),
-        [],[])
 AC_MSG_CHECKING([whether to check invariants (expensive cpu-wise)])
+AC_ARG_ENABLE([invariants],
+       AC_HELP_STRING([--enable-invariants],
+               [enable invariant checking (cpu intensive)]),
+       [], [enable_invariants="no"])
 AC_MSG_RESULT([$enable_invariants])
-if test x$enable_invariants = xyes ; then
-        AC_DEFINE([INVARIANT_CHECK], 1, [enable invariant checking])
-fi
+AS_IF([test "x$enable_invariants" = xyes],
+       [AC_DEFINE([CONFIG_LUSTRE_DEBUG_EXPENSIVE_CHECK], 1,
+               [enable invariant checking])])
 
-AC_ARG_ENABLE([lu_ref],
-        AC_HELP_STRING([--enable-lu_ref],
-                [enable lu_ref reference tracking code]),
-        [],[])
 AC_MSG_CHECKING([whether to track references with lu_ref])
+AC_ARG_ENABLE([lu_ref],
+       AC_HELP_STRING([--enable-lu_ref],
+               [enable lu_ref reference tracking code]),
+       [], [enable_lu_ref="no"])
 AC_MSG_RESULT([$enable_lu_ref])
-if test x$enable_lu_ref = xyes ; then
-        AC_DEFINE([USE_LU_REF], 1, [enable lu_ref reference tracking code])
-fi
+AS_IF([test "x$enable_lu_ref" = xyes],
+       [AC_DEFINE([USE_LU_REF], 1,
+               [enable lu_ref reference tracking code])])
 
-AC_ARG_ENABLE([pgstate-track],
-              AC_HELP_STRING([--enable-pgstate-track],
-                             [enable page state tracking]),
-              [enable_pgstat_track='yes'],[])
 AC_MSG_CHECKING([whether to enable page state tracking])
+AC_ARG_ENABLE([pgstate-track],
+       AC_HELP_STRING([--enable-pgstate-track],
+               [enable page state tracking]),
+       [], [enable_pgstat_track="no"])
 AC_MSG_RESULT([$enable_pgstat_track])
-if test x$enable_pgstat_track = xyes ; then
-        AC_DEFINE([LUSTRE_PAGESTATE_TRACKING], 1,
-                  [enable page state tracking code])
-fi
-
-         #2.6.29
-         LC_WRITE_BEGIN_END
-         LC_D_OBTAIN_ALIAS
-         LC_BLKDEV_PUT_2ARGS
-         LC_DENTRY_OPEN_4ARGS
-         LC_PAGEVEC_LRU_ADD_FILE
-
-])
+AS_IF([test "x$enable_pgstat_track" = xyes],
+       [AC_DEFINE([CONFIG_DEBUG_PAGESTATE_TRACKING], 1,
+               [enable page state tracking code])])
+]) # LC_CONFIGURE
 
 #
 # LC_CONDITIONALS
 #
 # AM_CONDITIONALS for lustre
 #
-AC_DEFUN([LC_CONDITIONALS],
-[AM_CONDITIONAL(LIBLUSTRE, test x$enable_liblustre = xyes)
-AM_CONDITIONAL(USE_QUILT, test x$QUILT != xno)
+AC_DEFUN([LC_CONDITIONALS], [
+AM_CONDITIONAL(LIBLUSTRE, test x$enable_liblustre = xyes)
 AM_CONDITIONAL(LIBLUSTRE_TESTS, test x$enable_liblustre_tests = xyes)
 AM_CONDITIONAL(MPITESTS, test x$enable_mpitests = xyes, Build MPI Tests)
 AM_CONDITIONAL(CLIENT, test x$enable_client = xyes)
@@ -2677,7 +1971,7 @@ AM_CONDITIONAL(GSS_KEYRING, test x$enable_gss_keyring = xyes)
 AM_CONDITIONAL(GSS_PIPEFS, test x$enable_gss_pipefs = xyes)
 AM_CONDITIONAL(LIBPTHREAD, test x$enable_libpthread = xyes)
 AM_CONDITIONAL(LLITE_LLOOP, test x$enable_llite_lloop_module = xyes)
-])
+]) # LC_CONDITIONALS
 
 #
 # LC_CONFIG_FILES
@@ -2699,13 +1993,13 @@ lustre/include/darwin/Makefile
 lustre/include/lustre/Makefile
 lustre/kernel_patches/targets/2.6-rhel6.target
 lustre/kernel_patches/targets/2.6-rhel5.target
-lustre/kernel_patches/targets/2.6-sles10.target
 lustre/kernel_patches/targets/2.6-sles11.target
 lustre/kernel_patches/targets/3.0-sles11.target
-lustre/kernel_patches/targets/2.6-oel5.target
+lustre/kernel_patches/targets/3.0-sles11sp3.target
 lustre/kernel_patches/targets/2.6-fc11.target
 lustre/kernel_patches/targets/2.6-fc12.target
 lustre/kernel_patches/targets/2.6-fc15.target
+lustre/kernel_patches/targets/3.x-fc18.target
 lustre/ldlm/Makefile
 lustre/fid/Makefile
 lustre/fid/autoMakefile
@@ -2717,14 +2011,16 @@ lustre/llite/autoMakefile
 lustre/lclient/Makefile
 lustre/lov/Makefile
 lustre/lov/autoMakefile
-lustre/lvfs/Makefile
-lustre/lvfs/autoMakefile
 lustre/mdc/Makefile
 lustre/mdc/autoMakefile
 lustre/lmv/Makefile
 lustre/lmv/autoMakefile
+lustre/lfsck/Makefile
+lustre/lfsck/autoMakefile
 lustre/mdt/Makefile
 lustre/mdt/autoMakefile
+lustre/nodemap/Makefile
+lustre/nodemap/autoMakefile
 lustre/mdd/Makefile
 lustre/mdd/autoMakefile
 lustre/fld/Makefile
@@ -2766,4 +2062,4 @@ lustre/lod/Makefile
 lustre/lod/autoMakefile
 lustre/obdclass/darwin/Makefile
 ])
-])
+]) # LC_CONFIG_FILES