Whamcloud - gitweb
b=20738 FC11 support in Yala is needed
[fs/lustre-release.git] / lustre / autoconf / lustre-core.m4
index e563887..fdc02db 100644 (file)
@@ -7,8 +7,10 @@
 #
 AC_DEFUN([LC_CONFIG_SRCDIR],
 [AC_CONFIG_SRCDIR([lustre/obdclass/obdo.c])
+libcfs_is_module=yes
+ldiskfs_is_ext4=yes
 ])
-                           
+
 #
 # LC_PATH_DEFAULTS
 #
@@ -47,238 +49,24 @@ esac
 ])
 
 #
-# LC_CONFIG_EXT3
-#
-# that ext3 is enabled in the kernel
-#
-AC_DEFUN([LC_CONFIG_EXT3],
-[LB_LINUX_CONFIG([EXT3_FS],[],[
-       LB_LINUX_CONFIG([EXT3_FS_MODULE],[],[$2])
-])
-LB_LINUX_CONFIG([EXT3_FS_XATTR],[$1],[$3])
-])
-
-#
-# LC_FSHOOKS
-#
-# If we have (and can build) fshooks.h
-#
-AC_DEFUN([LC_FSHOOKS],
-[LB_CHECK_FILE([$LINUX/include/linux/fshooks.h],[
-       AC_MSG_CHECKING([if fshooks.h can be compiled])
-       LB_LINUX_TRY_COMPILE([
-               #include <linux/fshooks.h>
-       ],[],[
-               AC_MSG_RESULT([yes])
-       ],[
-               AC_MSG_RESULT([no])
-               AC_MSG_WARN([You might have better luck with gcc 3.3.x.])
-               AC_MSG_WARN([You can set CC=gcc33 before running configure.])
-               AC_MSG_ERROR([Your compiler cannot build fshooks.h.])
-       ])
-$1
-],[
-$2
-])
-])
-
-#
-# LC_STRUCT_KIOBUF
-#
-# rh 2.4.18 has iobuf->dovary, but other kernels do not
-#
-AC_DEFUN([LC_STRUCT_KIOBUF],
-[AC_MSG_CHECKING([if struct kiobuf has a dovary field])
-LB_LINUX_TRY_COMPILE([
-       #include <linux/iobuf.h>
-],[
-       struct kiobuf iobuf;
-       iobuf.dovary = 1;
-],[
-       AC_MSG_RESULT([yes])
-       AC_DEFINE(HAVE_KIOBUF_DOVARY, 1, [struct kiobuf has a dovary field])
-],[
-       AC_MSG_RESULT([no])
-])
-])
-
-#
-# LC_FUNC_COND_RESCHED
-#
-# cond_resched() was introduced in 2.4.20
-#
-AC_DEFUN([LC_FUNC_COND_RESCHED],
-[AC_MSG_CHECKING([if kernel offers cond_resched])
-LB_LINUX_TRY_COMPILE([
-       #include <linux/sched.h>
-],[
-       cond_resched();
-],[
-       AC_MSG_RESULT([yes])
-       AC_DEFINE(HAVE_COND_RESCHED, 1, [cond_resched found])
-],[
-       AC_MSG_RESULT([no])
-])
-])
-
-#
-# LC_FUNC_ZAP_PAGE_RANGE
-#
-# if zap_page_range() takes a vma arg
-#
-AC_DEFUN([LC_FUNC_ZAP_PAGE_RANGE],
-[AC_MSG_CHECKING([if zap_page_range with vma parameter])
-ZAP_PAGE_RANGE_VMA="`grep -c 'zap_page_range.*struct vm_area_struct' $LINUX/include/linux/mm.h`"
-if test "$ZAP_PAGE_RANGE_VMA" != 0 ; then
-       AC_DEFINE(ZAP_PAGE_RANGE_VMA, 1, [zap_page_range with vma parameter])
-       AC_MSG_RESULT([yes])
-else
-       AC_MSG_RESULT([no])
-fi
-])
-
-#
-# LC_FUNC_PDE
-#
-# if proc_fs.h defines PDE()
-#
-AC_DEFUN([LC_FUNC_PDE],
-[AC_MSG_CHECKING([if kernel defines PDE])
-HAVE_PDE="`grep -c 'proc_dir_entry..PDE' $LINUX/include/linux/proc_fs.h`"
-if test "$HAVE_PDE" != 0 ; then
-       AC_DEFINE(HAVE_PDE, 1, [the kernel defines PDE])
-       AC_MSG_RESULT([yes])
-else
-       AC_MSG_RESULT([no])
-fi
-])
-
-#
-# LC_FUNC_FILEMAP_FDATASYNC
+# Ensure stack size big than 8k in Lustre server (all kernels)
 #
-# if filemap_fdatasync() exists
-#
-AC_DEFUN([LC_FUNC_FILEMAP_FDATAWRITE],
-[AC_MSG_CHECKING([whether filemap_fdatawrite() is defined])
-LB_LINUX_TRY_COMPILE([
-       #include <linux/fs.h>
-],[
-       int (*foo)(struct address_space *)= filemap_fdatawrite;
-],[
-       AC_MSG_RESULT([yes])
-       AC_DEFINE(HAVE_FILEMAP_FDATAWRITE, 1, [filemap_fdatawrite() found])
-],[
-       AC_MSG_RESULT([no])
-])
-])
-
-#
-# LC_FUNC_DIRECT_IO
-#
-# if direct_IO takes a struct file argument
-#
-AC_DEFUN([LC_FUNC_DIRECT_IO],
-[AC_MSG_CHECKING([if kernel passes struct file to direct_IO])
-HAVE_DIO_FILE="`grep -c 'direct_IO.*struct file' $LINUX/include/linux/fs.h`"
-if test "$HAVE_DIO_FILE" != 0 ; then
-       AC_DEFINE(HAVE_DIO_FILE, 1, [the kernel passes struct file to direct_IO])
-       AC_MSG_RESULT(yes)
-else
-       AC_MSG_RESULT(no)
-fi
-])
-
-#
-# LC_HEADER_MM_INLINE
-#
-# RHEL kernels define page_count in mm_inline.h
-#
-AC_DEFUN([LC_HEADER_MM_INLINE],
-[AC_MSG_CHECKING([if kernel has mm_inline.h header])
-LB_LINUX_TRY_COMPILE([
-       #include <linux/mm_inline.h>
-],[
-       #ifndef page_count
-       #error mm_inline.h does not define page_count
-       #endif
-],[
-       AC_MSG_RESULT([yes])
-       AC_DEFINE(HAVE_MM_INLINE, 1, [mm_inline found])
-],[
-       AC_MSG_RESULT([no])
-])
-])
-
-#
-# LC_STRUCT_INODE
-#
-# if inode->i_alloc_sem exists
-#
-AC_DEFUN([LC_STRUCT_INODE],
-[AC_MSG_CHECKING([if struct inode has i_alloc_sem])
-LB_LINUX_TRY_COMPILE([
-       #include <linux/fs.h>
-       #include <linux/version.h>
-],[
-       #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,4,24))
-       #error "down_read_trylock broken before 2.4.24"
-       #endif
-       struct inode i;
-       return (char *)&i.i_alloc_sem - (char *)&i;
-],[
-       AC_MSG_RESULT([yes])
-       AC_DEFINE(HAVE_I_ALLOC_SEM, 1, [struct inode has i_alloc_sem])
-],[
-       AC_MSG_RESULT([no])
-])
-])
-
-#
-# LC_FUNC_REGISTER_CACHE
-#
-# if register_cache() is defined by kernel
-#
-AC_DEFUN([LC_FUNC_REGISTER_CACHE],
-[AC_MSG_CHECKING([if kernel defines register_cache()])
+AC_DEFUN([LC_STACK_SIZE],
+[AC_MSG_CHECKING([stack size big than 8k])
 LB_LINUX_TRY_COMPILE([
-       #include <linux/list.h>
-       #include <linux/cache_def.h>
+       #include <linux/thread_info.h>
 ],[
-       struct cache_definition cache;
+        #if THREAD_SIZE < 8192
+        #error "stack size < 8192"
+        #endif
 ],[
-       AC_MSG_RESULT([yes])
-       AC_DEFINE(HAVE_REGISTER_CACHE, 1, [register_cache found])
-       AC_MSG_CHECKING([if kernel expects return from cache shrink function])
-       HAVE_CACHE_RETURN_INT="`grep -c 'int.*shrink' $LINUX/include/linux/cache_def.h`"
-       if test "$HAVE_CACHE_RETURN_INT" != 0 ; then
-               AC_DEFINE(HAVE_CACHE_RETURN_INT, 1, [kernel expects return from shrink_cache])
-               AC_MSG_RESULT(yes)
-       else
-               AC_MSG_RESULT(no)
-       fi
+        AC_MSG_RESULT(yes)
 ],[
-       AC_MSG_RESULT([no])
+        AC_MSG_ERROR([Lustre requires that Linux is configured with at least a 8KB stack.])
 ])
 ])
 
 #
-# LC_FUNC_GRAB_CACHE_PAGE_NOWAIT_GFP
-#
-# check for our patched grab_cache_page_nowait_gfp() function
-#
-AC_DEFUN([LC_FUNC_GRAB_CACHE_PAGE_NOWAIT_GFP],
-[AC_MSG_CHECKING([if kernel defines grab_cache_page_nowait_gfp()])
-HAVE_GCPN_GFP="`grep -c 'grab_cache_page_nowait_gfp' $LINUX/include/linux/pagemap.h`"
-if test "$HAVE_GCPN_GFP" != 0 ; then
-       AC_DEFINE(HAVE_GRAB_CACHE_PAGE_NOWAIT_GFP, 1,
-               [kernel has grab_cache_page_nowait_gfp()])
-       AC_MSG_RESULT(yes)
-else
-       AC_MSG_RESULT(no)
-fi
-])
-
-#
 # LC_FUNC_DEV_SET_RDONLY
 #
 # check for the old-style dev_set_rdonly which took an extra "devno" param
@@ -288,6 +76,7 @@ AC_DEFUN([LC_FUNC_DEV_SET_RDONLY],
 [AC_MSG_CHECKING([if kernel has new dev_set_rdonly])
 LB_LINUX_TRY_COMPILE([
         #include <linux/fs.h>
+        #include <linux/blkdev.h>
 ],[
         #ifndef HAVE_CLEAR_RDONLY_ON_PUT
         #error needs to be patched by lustre kernel patches from Lustre version 1.4.3 or above.
@@ -296,7 +85,7 @@ LB_LINUX_TRY_COMPILE([
         AC_MSG_RESULT([yes])
         AC_DEFINE(HAVE_DEV_SET_RDONLY, 1, [kernel has new dev_set_rdonly])
 ],[
-        AC_MSG_RESULT([no, Linux kernel source needs to be patches by lustre 
+        AC_MSG_ERROR([no, Linux kernel source needs to be patches by lustre
 kernel patches from Lustre version 1.4.3 or above.])
 ])
 ])
@@ -311,19 +100,9 @@ AC_DEFUN([LC_CONFIG_BACKINGFS],
 BACKINGFS="ldiskfs"
 
 if test x$with_ldiskfs = xno ; then
-       BACKINGFS="ext3"
-
        if test x$linux25$enable_server = xyesyes ; then
                AC_MSG_ERROR([ldiskfs is required for 2.6-based servers.])
        fi
-
-       # --- Check that ext3 and ext3 xattr are enabled in the kernel
-       LC_CONFIG_EXT3([],[
-               AC_MSG_ERROR([Lustre requires that ext3 is enabled in the kernel])
-       ],[
-               AC_MSG_WARN([Lustre requires that extended attributes for ext3 are enabled in the kernel])
-               AC_MSG_WARN([This build may fail.])
-       ])
 else
        # ldiskfs is enabled
        LB_DEFINE_LDISKFS_OPTIONS
@@ -352,6 +131,47 @@ fi
 ])
 
 #
+# 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_ARG_ENABLE([checksum],
+       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
+])
+
+#
+# LC_HEADER_LDISKFS_XATTR
+#
+# CHAOS kernel-devel package will not include fs/ldiskfs/xattr.h
+#
+AC_DEFUN([LC_HEADER_LDISKFS_XATTR],
+[AC_MSG_CHECKING([if ldiskfs has xattr.h header])
+tmp_flags="$EXTRA_KCFLAGS"
+EXTRA_KCFLAGS="-I$LINUX/fs -I$LDISKFS_DIR -I$LDISKFS_DIR/ldiskfs"
+LB_LINUX_TRY_COMPILE([
+       #include <ldiskfs/xattr.h>
+],[
+        ldiskfs_xattr_get(NULL, 0, "", NULL, 0);
+        ldiskfs_xattr_set_handle(NULL, NULL, 0, "", NULL, 0, 0);
+
+],[
+       AC_MSG_RESULT([yes])
+       AC_DEFINE(HAVE_LDISKFS_XATTR_H, 1, [ldiskfs/xattr.h found])
+],[
+       AC_MSG_RESULT([no])
+])
+EXTRA_KCFLAGS="$tmp_flags"
+])
+
+#
 # LC_CONFIG_HEALTH_CHECK_WRITE
 #
 # Turn off the actual write to the disk
@@ -439,35 +259,71 @@ AC_TRY_COMPILE([
 ])
 ])
 
-AC_DEFUN([LC_FUNC_PAGE_MAPPED],
-[AC_MSG_CHECKING([if kernel offers page_mapped])
+#
+# LC_FUNC_MS_FLOCK_LOCK
+#
+# 2.6.5 kernel has MS_FLOCK_LOCK sb flag
+#
+AC_DEFUN([LC_FUNC_MS_FLOCK_LOCK],
+[AC_MSG_CHECKING([if kernel has MS_FLOCK_LOCK sb flag])
 LB_LINUX_TRY_COMPILE([
-       #include <linux/mm.h>
+        #include <linux/fs.h>
 ],[
-       page_mapped(NULL);
+        int flags = MS_FLOCK_LOCK;
 ],[
-       AC_MSG_RESULT([yes])
-       AC_DEFINE(HAVE_PAGE_MAPPED, 1, [page_mapped found])
+        AC_DEFINE(HAVE_MS_FLOCK_LOCK, 1,
+                [kernel has MS_FLOCK_LOCK flag])
+        AC_MSG_RESULT([yes])
 ],[
-       AC_MSG_RESULT([no])
+        AC_MSG_RESULT([no])
 ])
 ])
 
-AC_DEFUN([LC_STRUCT_FILE_OPS_UNLOCKED_IOCTL],
-[AC_MSG_CHECKING([if struct file_operations has an unlocked_ioctl field])
+#
+# LC_FUNC_HAVE_CAN_SLEEP_ARG
+#
+# 2.6.5 kernel has third arg can_sleep in fs/locks.c: flock_lock_file_wait()
+#
+AC_DEFUN([LC_FUNC_HAVE_CAN_SLEEP_ARG],
+[AC_MSG_CHECKING([if kernel has third arg can_sleep in fs/locks.c: flock_lock_file_wait()])
 LB_LINUX_TRY_COMPILE([
         #include <linux/fs.h>
 ],[
-        struct file_operations fops;
-        &fops.unlocked_ioctl;
+        int cansleep;
+        struct file *file;
+        struct file_lock *file_lock;
+        flock_lock_file_wait(file, file_lock, cansleep);
 ],[
+        AC_DEFINE(HAVE_CAN_SLEEP_ARG, 1,
+                [kernel has third arg can_sleep in fs/locks.c: flock_lock_file_wait()])
         AC_MSG_RESULT([yes])
-        AC_DEFINE(HAVE_UNLOCKED_IOCTL, 1, [struct file_operations has an unlock ed_ioctl field])
 ],[
         AC_MSG_RESULT([no])
 ])
 ])
 
+#
+# LC_FUNC_RELEASEPAGE_WITH_GFP
+#
+# 2.6.9 ->releasepage() takes a gfp_t arg
+# This kernel defines gfp_t (HAS_GFP_T) but doesn't use it for this function,
+# while others either don't have gfp_t or pass gfp_t as the parameter.
+#
+AC_DEFUN([LC_FUNC_RELEASEPAGE_WITH_GFP],
+[AC_MSG_CHECKING([if releasepage has a gfp_t parameter])
+RELEASEPAGE_WITH_GFP="$(grep -c 'releasepage.*gfp_t' $LINUX/include/linux/fs.h)"
+if test "$RELEASEPAGE_WITH_GFP" != 0 ; then
+       AC_DEFINE(HAVE_RELEASEPAGE_WITH_GFP, 1,
+                  [releasepage with gfp_t parameter])
+       AC_MSG_RESULT([yes])
+else
+       AC_MSG_RESULT([no])
+fi
+])
+
+#
+# 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([
@@ -483,6 +339,9 @@ LB_LINUX_TRY_COMPILE([
 ])
 ])
 
+#
+# added in 2.6.15
+#
 AC_DEFUN([LC_D_ADD_UNIQUE],
 [AC_MSG_CHECKING([for d_add_unique])
 LB_LINUX_TRY_COMPILE([
@@ -497,6 +356,9 @@ LB_LINUX_TRY_COMPILE([
 ])
 ])
 
+#
+# 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])
@@ -515,9 +377,7 @@ AC_DEFUN([LC_BIT_SPINLOCK_H],
 ])
 
 #
-# LC_POSIX_ACL_XATTR
-#
-# If we have xattr_acl.h 
+# After 2.6.26 we no longer have xattr_acl.h
 #
 AC_DEFUN([LC_XATTR_ACL],
 [LB_CHECK_FILE([$LINUX/include/linux/xattr_acl.h],[
@@ -534,6 +394,9 @@ AC_DEFUN([LC_XATTR_ACL],
 [])
 ])
 
+
+# added in 2.6.16
+#
 AC_DEFUN([LC_STRUCT_INTENT_FILE],
 [AC_MSG_CHECKING([if struct open_intent has a file field])
 LB_LINUX_TRY_COMPILE([
@@ -551,6 +414,9 @@ LB_LINUX_TRY_COMPILE([
 ])
 
 
+#
+# After 2.6.16 the xattr_acl API is removed, and posix_acl is used instead
+#
 AC_DEFUN([LC_POSIX_ACL_XATTR_H],
 [LB_CHECK_FILE([$LINUX/include/linux/posix_acl_xattr.h],[
         AC_MSG_CHECKING([if linux/posix_acl_xattr.h can be compiled])
@@ -581,7 +447,9 @@ AC_DEFUN([LC_EXPORT___IGET],
 ])
 ])
 
-
+#
+# only for Lustre-patched kernels
+#
 AC_DEFUN([LC_LUSTRE_VERSION_H],
 [LB_CHECK_FILE([$LINUX/include/linux/lustre_version.h],[
        rm -f "$LUSTRE/include/linux/lustre_version.h"
@@ -596,14 +464,6 @@ AC_DEFUN([LC_LUSTRE_VERSION_H],
 ])
 ])
 
-AC_DEFUN([LC_FUNC_SET_FS_PWD],
-[LB_CHECK_SYMBOL_EXPORT([set_fs_pwd],
-[fs/namespace.c],[
-        AC_DEFINE(HAVE_SET_FS_PWD, 1, [set_fs_pwd is exported])
-],[
-])
-])
-
 #
 # LC_CAPA_CRYPTO
 #
@@ -619,169 +479,121 @@ LB_LINUX_CONFIG_IM([CRYPTO_SHA1],[],[
 ])
 ])
 
-m4_pattern_allow(AC_KERBEROS_V5)
-
 #
-# LC_CONFIG_GSS
+# LC_CONFIG_RMTCLIENT
 #
-# 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
-       LB_LINUX_CONFIG_IM([SUNRPC],[],[
-               AC_MSG_ERROR([GSS require that CONFIG_SUNRPC is enabled in your kernel.])
-       ])
-       LB_LINUX_CONFIG_IM([CRYPTO_DES],[],[
-               AC_MSG_WARN([DES support is recommended by using GSS.])
-       ])
-       LB_LINUX_CONFIG_IM([CRYPTO_MD5],[],[
-               AC_MSG_WARN([MD5 support is recommended by using GSS.])
-       ])
-       LB_LINUX_CONFIG_IM([CRYPTO_SHA256],[],[
-               AC_MSG_WARN([SHA256 support is recommended by using GSS.])
-       ])
-       LB_LINUX_CONFIG_IM([CRYPTO_SHA512],[],[
-               AC_MSG_WARN([SHA512 support is recommended by using GSS.])
-       ])
-       LB_LINUX_CONFIG_IM([CRYPTO_ARC4],[],[
-               AC_MSG_WARN([ARC4 support is recommended by using GSS.])
-       ])
-       #
-       # AES symbol is uncertain (optimized & depend on arch)
-       #
-
-       AC_CHECK_LIB(gssapi, gss_init_sec_context, [
-               GSSAPI_LIBS="$GSSAPI_LDFLAGS -lgssapi"
-               ], [
-               AC_MSG_ERROR([libgssapi is not found, consider --disable-gss.])
-               ], 
-       )
-
-       AC_SUBST(GSSAPI_LIBS)
-       AC_KERBEROS_V5
-fi
+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.])
+])
 ])
 
-# LC_FUNC_MS_FLOCK_LOCK
-#
-# SLES9 kernel has MS_FLOCK_LOCK sb flag
-#
-AC_DEFUN([LC_FUNC_MS_FLOCK_LOCK],
-[AC_MSG_CHECKING([if kernel has MS_FLOCK_LOCK sb flag])
+AC_DEFUN([LC_SUNRPC_CACHE],
+[AC_MSG_CHECKING([if sunrpc struct cache_head uses kref])
 LB_LINUX_TRY_COMPILE([
-        #include <linux/fs.h>
+        #include <linux/sunrpc/cache.h>
 ],[
-        int flags = MS_FLOCK_LOCK;
+        struct cache_head ch;
+        &ch.ref.refcount;
 ],[
-        AC_DEFINE(HAVE_MS_FLOCK_LOCK, 1,
-                [kernel has MS_FLOCK_LOCK flag])
         AC_MSG_RESULT([yes])
+        AC_DEFINE(HAVE_SUNRPC_CACHE_V2, 1, [sunrpc cache facility v2])
 ],[
         AC_MSG_RESULT([no])
 ])
 ])
 
+AC_DEFUN([LC_CONFIG_SUNRPC],
+[LB_LINUX_CONFIG_IM([SUNRPC],[],
+                    [AC_MSG_ERROR([kernel SUNRPC support is required by using GSS.])])
+ LC_SUNRPC_CACHE
+])
+
 #
-# LC_FUNC_HAVE_CAN_SLEEP_ARG
-#
-# SLES9 kernel has third arg can_sleep
-# in fs/locks.c: flock_lock_file_wait()
+# LC_CONFIG_GSS_KEYRING (default enabled, if gss is enabled)
 #
-AC_DEFUN([LC_FUNC_HAVE_CAN_SLEEP_ARG],
-[AC_MSG_CHECKING([if kernel has third arg can_sleep in fs/locks.c: flock_lock_file_wait()])
-LB_LINUX_TRY_COMPILE([
-        #include <linux/fs.h>
-],[
-        int cansleep;
-        struct file *file;
-        struct file_lock *file_lock;
-        flock_lock_file_wait(file, file_lock, cansleep);
-],[
-        AC_DEFINE(HAVE_CAN_SLEEP_ARG, 1,
-                [kernel has third arg can_sleep in fs/locks.c: flock_lock_file_wait()])
-        AC_MSG_RESULT([yes])
-],[
-        AC_MSG_RESULT([no])
-])
+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_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
 ])
 
 #
-# LC_FUNC_F_OP_FLOCK
-#
-# rhel4.2 kernel has f_op->flock field
+# LC_CONFIG_GSS (default disabled)
 #
-AC_DEFUN([LC_FUNC_F_OP_FLOCK],
-[AC_MSG_CHECKING([if struct file_operations has flock field])
-LB_LINUX_TRY_COMPILE([
-        #include <linux/fs.h>
-],[
-        struct file_operations ll_file_operations_flock;
-        ll_file_operations_flock.flock = NULL;
-],[
-        AC_DEFINE(HAVE_F_OP_FLOCK, 1,
-                [struct file_operations has flock field])
-        AC_MSG_RESULT([yes])
-],[
-        AC_MSG_RESULT([no])
-])
-])
-
-#
-# LC_TASK_PPTR
-#
-# task struct has p_pptr instead of parent
+# Build gss and related tools of Lustre. Currently both kernel and user space
+# parts are depend on linux platform.
 #
-AC_DEFUN([LC_TASK_PPTR],
-[AC_MSG_CHECKING([task p_pptr found])
-LB_LINUX_TRY_COMPILE([
-       #include <linux/sched.h>
-],[
-       struct task_struct *p;
-       
-       p = p->p_pptr;
-],[
-       AC_MSG_RESULT([yes])
-       AC_DEFINE(HAVE_TASK_PPTR, 1, [task p_pptr found])
-],[
-       AC_MSG_RESULT([no])
-])
+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
 ])
 
-#
-# LC_FUNC_F_OP_FLOCK
-#
-# rhel4.2 kernel has f_op->flock field
-#
-AC_DEFUN([LC_FUNC_F_OP_FLOCK],
-[AC_MSG_CHECKING([if struct file_operations has flock field])
-LB_LINUX_TRY_COMPILE([
-        #include <linux/fs.h>
-],[
-        struct file_operations ll_file_operations_flock;
-        ll_file_operations_flock.flock = NULL;
-],[
-        AC_DEFINE(HAVE_F_OP_FLOCK, 1,
-                [struct file_operations has flock field])
-        AC_MSG_RESULT([yes])
+# LC_EXPORT_SYNCHRONIZE_RCU
+# after 2.6.12 synchronize_rcu is preferred over synchronize_kernel
+AC_DEFUN([LC_EXPORT_SYNCHRONIZE_RCU],
+[LB_CHECK_SYMBOL_EXPORT([synchronize_rcu],
+[kernel/rcupdate.c],[
+        AC_DEFINE(HAVE_SYNCHRONIZE_RCU, 1,
+                [in 2.6.12 synchronize_rcu preferred over synchronize_kernel])
 ],[
-        AC_MSG_RESULT([no])
 ])
 ])
 
 # LC_INODE_I_MUTEX
 # after 2.6.15 inode have i_mutex intead of i_sem
 AC_DEFUN([LC_INODE_I_MUTEX],
-[AC_MSG_CHECKING([use inode have i_mutex ])
+[AC_MSG_CHECKING([if inode has i_mutex ])
 LB_LINUX_TRY_COMPILE([
        #include <linux/mutex.h>
        #include <linux/fs.h>
+       #undef i_mutex
 ],[
        struct inode i;
 
@@ -791,10 +603,28 @@ LB_LINUX_TRY_COMPILE([
         AC_DEFINE(HAVE_INODE_I_MUTEX, 1,
                 [after 2.6.15 inode have i_mutex intead of i_sem])
 ],[
-        AC_MSG_RESULT(NO)
+        AC_MSG_RESULT(no)
 ])
 ])
 
+# LC_SEQ_LOCK
+# after 2.6.18 seq_file has lock intead of sem
+AC_DEFUN([LC_SEQ_LOCK],
+[AC_MSG_CHECKING([if struct seq_file has lock field])
+LB_LINUX_TRY_COMPILE([
+        #include <linux/seq_file.h>
+],[
+       struct seq_file seq;
+
+       mutex_unlock(&seq.lock);
+],[
+        AC_MSG_RESULT(yes)
+        AC_DEFINE(HAVE_SEQ_LOCK, 1,
+                [after 2.6.18 seq_file has lock intead of sem])
+],[
+        AC_MSG_RESULT(NO)
+])
+])
 
 # LC_DQUOTOFF_MUTEX
 # after 2.6.17 dquote use mutex instead if semaphore
@@ -813,10 +643,10 @@ LB_LINUX_TRY_COMPILE([
         AC_DEFINE(HAVE_DQUOTOFF_MUTEX, 1,
                 [after 2.6.17 dquote use mutex instead if semaphore])
 ],[
-        AC_MSG_RESULT(NO)
+        AC_MSG_RESULT(no)
 ])
 ])
+
 #
 # LC_STATFS_DENTRY_PARAM
 # starting from 2.6.18 linux kernel uses dentry instead of
@@ -857,10 +687,29 @@ LB_LINUX_TRY_COMPILE([
 ])
 ])
 
-# 
+#
+# LC_D_OBTAIN_ALIAS
+# starting from 2.6.18 kernel don't export do_kern_mount
+# and want to use vfs_kern_mount instead.
+#
+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);
+],[
+        AC_DEFINE(HAVE_D_OBTAIN_ALIAS, 1,
+                [d_obtain_alias exist in kernel])
+        AC_MSG_RESULT([yes])
+],[
+        AC_MSG_RESULT([no])
+])
+])
+
+#
 # LC_INVALIDATEPAGE_RETURN_INT
-# more 2.6 api changes.  return type for the invalidatepage
-# address_space_operation is 'void' in new kernels but 'int' in old
+# 2.6.17 changes return type for invalidatepage to 'void' from 'int'
 #
 AC_DEFUN([LC_INVALIDATEPAGE_RETURN_INT],
 [AC_MSG_CHECKING([invalidatepage has return int])
@@ -873,12 +722,12 @@ LB_LINUX_TRY_COMPILE([
        AC_DEFINE(HAVE_INVALIDATEPAGE_RETURN_INT, 1,
                [Define if return type of invalidatepage should be int])
 ],[
-       AC_MSG_RESULT(NO)
+       AC_MSG_RESULT(no)
 ])
 ])
 
 # LC_UMOUNTBEGIN_HAS_VFSMOUNT
-# more 2.6 API changes. 2.6.18 umount_begin has different parameters
+# after 2.6.18 umount_begin has different parameters
 AC_DEFUN([LC_UMOUNTBEGIN_HAS_VFSMOUNT],
 [AC_MSG_CHECKING([if umount_begin needs vfsmount parameter instead of super_block])
 tmp_flags="$EXTRA_KCFLAGS"
@@ -902,11 +751,28 @@ LB_LINUX_TRY_COMPILE([
        AC_DEFINE(HAVE_UMOUNTBEGIN_VFSMOUNT, 1,
                [Define umount_begin need second argument])
 ],[
-       AC_MSG_RESULT(NO)
+       AC_MSG_RESULT(no)
 ])
 EXTRA_KCFLAGS="$tmp_flags"
 ])
 
+# inode have i_private field since 2.6.17
+AC_DEFUN([LC_INODE_IPRIVATE],
+[AC_MSG_CHECKING([if inode has a i_private field])
+LB_LINUX_TRY_COMPILE([
+#include <linux/fs.h>
+],[
+       struct inode i;
+       i.i_private = NULL; 
+],[
+       AC_MSG_RESULT(yes)
+       AC_DEFINE(HAVE_INODE_IPRIVATE, 1,
+               [struct inode has i_private field])
+],[
+       AC_MSG_RESULT(no)
+])
+])
+
 # 2.6.19 API changes
 # inode don't have i_blksize field
 AC_DEFUN([LC_INODE_BLKSIZE],
@@ -915,13 +781,13 @@ LB_LINUX_TRY_COMPILE([
 #include <linux/fs.h>
 ],[
        struct inode i;
-       i.i_blksize = 0; 
+       i.i_blksize = 0;
 ],[
        AC_MSG_RESULT(yes)
        AC_DEFINE(HAVE_INODE_BLKSIZE, 1,
                [struct inode has i_blksize field])
 ],[
-       AC_MSG_RESULT(NO)
+       AC_MSG_RESULT(no)
 ])
 ])
 
@@ -948,44 +814,44 @@ LB_LINUX_TRY_COMPILE([
         AC_DEFINE(HAVE_VFS_READDIR_U64_INO, 1,
                 [if vfs_readdir need 64bit inode number])
 ],[
-        AC_MSG_RESULT(NO)
+        AC_MSG_RESULT(no)
 ])
 EXTRA_KCFLAGS="$tmp_flags"
 ])
 
-# LC_GENERIC_FILE_WRITE
-# 2.6.19 introduce do_sync_write instead of
-# generic_file_write
-AC_DEFUN([LC_GENERIC_FILE_WRITE],
-[AC_MSG_CHECKING([use generic_file_write])
+# 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>
 ],[
-        int result = generic_file_read(NULL, NULL, 0, 0);
+        struct file_operations *fops = NULL;
+        fops->writev = NULL;
 ],[
         AC_MSG_RESULT(yes)
-        AC_DEFINE(HAVE_GENERIC_FILE_WRITE, 1,
-                [use generic_file_write])
+        AC_DEFINE(HAVE_FILE_WRITEV, 1,
+                [use fops->writev])
 ],[
-       AC_MSG_RESULT(NO)
+       AC_MSG_RESULT(no)
 ])
 ])
 
 # LC_GENERIC_FILE_READ
-# 2.6.19 need to use do_sync_read instead of
-# generic_file_read
-AC_DEFUN([LC_GENERIC_FILE_READ],
-[AC_MSG_CHECKING([use generic_file_read])
+# 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>
 ],[
-        int result = generic_file_read(NULL, NULL, 0, 0);
+        struct file_operations *fops = NULL;
+        fops->readv = NULL;
 ],[
         AC_MSG_RESULT(yes)
-        AC_DEFINE(HAVE_GENERIC_FILE_READ, 1,
-                [use generic_file_read])
+        AC_DEFINE(HAVE_FILE_READV, 1,
+                [use fops->readv])
 ],[
-        AC_MSG_RESULT(NO)
+        AC_MSG_RESULT(no)
 ])
 ])
 
@@ -1002,26 +868,33 @@ LB_LINUX_TRY_COMPILE([
         AC_DEFINE(HAVE_NR_PAGECACHE, 1,
                 [is kernel export nr_pagecache])
 ],[
-        AC_MSG_RESULT(NO)
+        AC_MSG_RESULT(no)
 ])
 ])
 
 # LC_CANCEL_DIRTY_PAGE
-# 2.6.20 introduse cancel_dirty_page instead of 
-# clear_page_dirty.
+# 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])
-LB_LINUX_TRY_COMPILE([
-        #include <linux/page-flags.h>
+        [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);
+                        cancel_dirty_page(NULL, 0);
 ],[
-        AC_MSG_RESULT(yes)
-        AC_DEFINE(HAVE_CANCEL_DIRTY_PAGE, 1,
-                  [kernel has cancel_dirty_page instead of clear_page_dirty])
+                        AC_MSG_RESULT(yes)
+                        AC_DEFINE(HAVE_CANCEL_DIRTY_PAGE, 1,
+                                  [kernel has cancel_dirty_page instead of clear_page_dirty])
 ],[
-        AC_MSG_RESULT(NO)
+                        AC_MSG_RESULT(no)
 ])
+        fi
 ])
 
 #
@@ -1034,6 +907,7 @@ LB_LINUX_TRY_COMPILE([
 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>
 ],[
         #ifndef PG_constant
@@ -1047,11 +921,11 @@ LB_LINUX_TRY_COMPILE([
 ])
 ])
 
-# RHEL5 in FS-cache patch rename PG_checked flag
-# into PG_fs_misc
+# RHEL5 in FS-cache patch rename PG_checked flag into PG_fs_misc
 AC_DEFUN([LC_PG_FS_MISC],
 [AC_MSG_CHECKING([kernel has PG_fs_misc])
 LB_LINUX_TRY_COMPILE([
+        #include <linux/mm.h>
         #include <linux/page-flags.h>
 ],[
         #ifndef PG_fs_misc
@@ -1062,7 +936,34 @@ LB_LINUX_TRY_COMPILE([
         AC_DEFINE(HAVE_PG_FS_MISC, 1,
                   [is kernel have PG_fs_misc])
 ],[
-        AC_MSG_RESULT(NO)
+        AC_MSG_RESULT(no)
+])
+])
+
+# RHEL5 PageChecked and SetPageChecked defined
+AC_DEFUN([LC_PAGE_CHECKED],
+[AC_MSG_CHECKING([kernel has PageChecked and SetPageChecked])
+LB_LINUX_TRY_COMPILE([
+        #include <linux/autoconf.h>
+#ifdef HAVE_LINUX_MMTYPES_H
+        #include <linux/mm_types.h>
+#endif
+       #include <linux/page-flags.h>
+],[
+       struct page *p;
+
+        /* before 2.6.26 this define*/
+        #ifndef PageChecked    
+       /* 2.6.26 use function instead of define for it */
+       SetPageChecked(p);
+       PageChecked(p);
+       #endif
+],[
+        AC_MSG_RESULT(yes)
+        AC_DEFINE(HAVE_PAGE_CHECKED, 1,
+                  [does kernel have PageChecked and SetPageChecked])
+],[
+        AC_MSG_RESULT(no)
 ])
 ])
 
@@ -1075,6 +976,15 @@ AC_DEFINE(HAVE_TRUNCATE_COMPLETE_PAGE, 1,
 ])
 ])
 
+AC_DEFUN([LC_EXPORT_TRUNCATE_RANGE],
+[LB_CHECK_SYMBOL_EXPORT([truncate_inode_pages_range],
+[mm/truncate.c],[
+AC_DEFINE(HAVE_TRUNCATE_RANGE, 1,
+            [kernel export truncate_inode_pages_range])
+],[
+])
+])
+
 AC_DEFUN([LC_EXPORT_D_REHASH_COND],
 [LB_CHECK_SYMBOL_EXPORT([d_rehash_cond],
 [fs/dcache.c],[
@@ -1093,13 +1003,62 @@ AC_DEFINE(HAVE___D_REHASH, 1,
 ])
 ])
 
+AC_DEFUN([LC_EXPORT_D_MOVE_LOCKED],
+[LB_CHECK_SYMBOL_EXPORT([d_move_locked],
+[fs/dcache.c],[
+AC_DEFINE(HAVE_D_MOVE_LOCKED, 1,
+            [d_move_locked is exported by the kernel])
+],[
+])
+])
+
+AC_DEFUN([LC_EXPORT___D_MOVE],
+[LB_CHECK_SYMBOL_EXPORT([__d_move],
+[fs/dcache.c],[
+AC_DEFINE(HAVE___D_MOVE, 1,
+            [__d_move is exported by the kernel])
+],[
+])
+])
+
+#
+# LC_EXPORT_INVALIDATE_MAPPING_PAGES
+#
+# SLES9, RHEL4, RHEL5, vanilla 2.6.24 export invalidate_mapping_pages() but
+# SLES10 2.6.16 does not, for some reason.  For filter cache invalidation.
+#
+AC_DEFUN([LC_EXPORT_INVALIDATE_MAPPING_PAGES],
+    [LB_CHECK_SYMBOL_EXPORT([invalidate_mapping_pages], [mm/truncate.c], [
+         AC_DEFINE(HAVE_INVALIDATE_MAPPING_PAGES, 1,
+                        [exported invalidate_mapping_pages])],
+    [LB_CHECK_SYMBOL_EXPORT([invalidate_inode_pages], [mm/truncate.c], [
+         AC_DEFINE(HAVE_INVALIDATE_INODE_PAGES, 1,
+                        [exported invalidate_inode_pages])], [
+       AC_MSG_ERROR([no way to invalidate pages])
+  ])
+    ],[])
+])
+
+#
+# LC_EXPORT_FILEMAP_FDATASYNC_RANGE
+#
+# No standard kernels export this
+#
+AC_DEFUN([LC_EXPORT_FILEMAP_FDATAWRITE_RANGE],
+[LB_CHECK_SYMBOL_EXPORT([filemap_fdatawrite_range],
+[mm/filemap.c],[
+AC_DEFINE(HAVE_FILEMAP_FDATAWRITE_RANGE, 1,
+            [filemap_fdatawrite_range is exported by the kernel])
+],[
+])
+])
+
 # 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_LINUX_ARCH
-          LB_CHECK_SYMBOL_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
@@ -1116,211 +1075,1107 @@ AC_DEFUN([LC_EXPORT_NODE_TO_CPUMASK],
                                              the kernel])]) # i386
           ])
 
-#
-# LC_VFS_INTENT_PATCHES
-#
-# check if the kernel has the VFS intent patches
-AC_DEFUN([LC_VFS_INTENT_PATCHES],
-[AC_MSG_CHECKING([if the kernel has the VFS intent patches])
+# 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/fs.h>
-        #include <linux/namei.h>
+        #include <linux/buffer_head.h>
 ],[
-        struct nameidata nd;
-        struct lookup_intent *it;
-
-        it = &nd.intent;
-        intent_init(it, IT_OPEN);
-        it->d.lustre.it_disposition = 0;
-        it->d.lustre.it_data = NULL;
+        invalidate_bdev(NULL,0);
 ],[
         AC_MSG_RESULT([yes])
-        AC_DEFINE(HAVE_VFS_INTENT_PATCHES, 1, [VFS intent patches are applied])
+        AC_DEFINE(HAVE_INVALIDATE_BDEV_2ARG, 1,
+                [invalidate_bdev has second argument])
 ],[
         AC_MSG_RESULT([no])
 ])
 ])
 
-#
-# LC_PROG_LINUX
-#
-# Lustre linux kernel checks
-#
-AC_DEFUN([LC_PROG_LINUX],
-[ LC_LUSTRE_VERSION_H
-if test x$enable_server = xyes ; then
-        LC_CONFIG_BACKINGFS
-fi
-LC_CONFIG_PINGER
-LC_CONFIG_LIBLUSTRE_RECOVERY
-LC_CONFIG_QUOTA
-LC_CONFIG_HEALTH_CHECK_WRITE
-
-LC_TASK_PPTR
-# RHEL4 patches
-LC_EXPORT_TRUNCATE_COMPLETE
-LC_EXPORT_D_REHASH_COND
-LC_EXPORT___D_REHASH
-LC_EXPORT_NODE_TO_CPUMASK
-
-LC_STRUCT_KIOBUF
-LC_FUNC_COND_RESCHED
-LC_FUNC_ZAP_PAGE_RANGE
-LC_FUNC_PDE
-LC_FUNC_DIRECT_IO
-LC_HEADER_MM_INLINE
-LC_STRUCT_INODE
-LC_FUNC_REGISTER_CACHE
-LC_FUNC_GRAB_CACHE_PAGE_NOWAIT_GFP
-LC_FUNC_DEV_SET_RDONLY
-LC_FUNC_FILEMAP_FDATAWRITE
-LC_STRUCT_STATFS
-LC_FUNC_PAGE_MAPPED
-LC_STRUCT_FILE_OPS_UNLOCKED_IOCTL
-LC_FILEMAP_POPULATE
-LC_D_ADD_UNIQUE
-LC_BIT_SPINLOCK_H
-LC_XATTR_ACL
-LC_STRUCT_INTENT_FILE
-LC_POSIX_ACL_XATTR_H
-LC_FUNC_SET_FS_PWD
-LC_CAPA_CRYPTO
-LC_CONFIG_GSS
-LC_FUNC_MS_FLOCK_LOCK
-LC_FUNC_HAVE_CAN_SLEEP_ARG
-LC_FUNC_F_OP_FLOCK
-LC_QUOTA_READ
-LC_COOKIE_FOLLOW_LINK
-LC_FUNC_RCU
-
-# does the kernel have VFS intent patches?
-LC_VFS_INTENT_PATCHES
-
-# 2.6.15
-LC_INODE_I_MUTEX
-
-# 2.6.17
-LC_DQUOTOFF_MUTEX
-
 # 2.6.18
-LC_NR_PAGECACHE
-LC_STATFS_DENTRY_PARAM
-LC_VFS_KERN_MOUNT
-LC_INVALIDATEPAGE_RETURN_INT
-LC_UMOUNTBEGIN_HAS_VFSMOUNT
 
-#2.6.18 + RHEL5 (fc6)
-LC_PG_FS_MISC
 
-# 2.6.19
-LC_INODE_BLKSIZE
-LC_VFS_READDIR_U64_INO
-LC_GENERIC_FILE_READ
-LC_GENERIC_FILE_WRITE
-
-# 2.6.20
-LC_CANCEL_DIRTY_PAGE
-
-# raid5-zerocopy patch
-LC_PAGE_CONSTANT
+# 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 = unregister_blkdev(0,NULL);
+],[
+        AC_MSG_RESULT([yes])
+        AC_DEFINE(HAVE_UNREGISTER_BLKDEV_RETURN_INT, 1,
+                [unregister_blkdev return int])
+],[
+        AC_MSG_RESULT([no])
+])
 ])
 
-#
-# LC_CONFIG_CLIENT_SERVER
-#
-# Build client/server sides 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])
+# 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>
+],[
+        struct file_operations file;
 
-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])])
+        file.sendfile = NULL;
+], [
+        AC_MSG_RESULT([yes])
+        AC_DEFINE(HAVE_KERNEL_SENDFILE, 1,
+                [kernel has .sendfile])
+],[
+        AC_MSG_RESULT([no])
+])
+])
 
-#
-# LC_CONFIG_LIBLUSTRE
-#
-# whether to build liblustre
-#
-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=$with_sysio])
-AC_MSG_RESULT([$enable_liblustre])
-# only build sysio if liblustre is built
-with_sysio="$enable_liblustre"
+# 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>
+],[
+        struct file_operations file;
 
-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
-AC_MSG_RESULT([$enable_liblustre_tests])
+        file.splice_read = NULL;
+], [
+        AC_MSG_RESULT([yes])
+        AC_DEFINE(HAVE_KERNEL_SPLICE_READ, 1,
+                [kernel has .slice_read])
+],[
+        AC_MSG_RESULT([no])
+])
+])
 
-AC_MSG_CHECKING([whether to build mpitests])
-AC_ARG_ENABLE([mpitests],
-       AC_HELP_STRING([--enable-mpitests],
-                       [build liblustre mpi tests]),
-       [],[enable_mpitests=no])
-AC_MSG_RESULT([$enable_mpitests])
+# 2.6.23 extract nfs export related data into exportfs.h
+AC_DEFUN([LC_HAVE_EXPORTFS_H],
+[LB_CHECK_FILE([$LINUX/include/linux/exportfs.h], [
+        AC_DEFINE(HAVE_LINUX_EXPORTFS_H, 1,
+                [kernel has include/exportfs.h])
+],[
+        AC_MSG_RESULT([no])
+])
+])
 
-AC_MSG_NOTICE([Enabling Lustre configure options for libsysio])
-ac_configure_args="$ac_configure_args --with-lustre-hack --with-sockets"
+# 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>
+],[
+        struct vm_operations_struct op;
 
-LC_CONFIG_PINGER
-LC_CONFIG_LIBLUSTRE_RECOVERY
+        op.fault = NULL;
+], [
+        AC_MSG_RESULT([yes])
+        AC_DEFINE(HAVE_VM_OP_FAULT, 1,
+                [kernel has .fault in vm_operation_struct])
+],[
+        AC_MSG_RESULT([no])
+])
 ])
 
-#
-# LC_CONFIG_QUOTA
-#
-# whether to enable quota support
-#
-AC_DEFUN([LC_CONFIG_QUOTA],
-[AC_MSG_CHECKING([whether to disable quota support])
-AC_ARG_ENABLE([quota], 
-       AC_HELP_STRING([--disable-quota],
-                       [disable quota support]),
-       [],[enable_quota='yes'])
-AC_MSG_RESULT([$enable_quota])
-if test x$linux25 != xyes; then
-   enable_quota='no'
+#2.6.23 has new shrinker API
+AC_DEFUN([LC_REGISTER_SHRINKER],
+[AC_MSG_CHECKING([if kernel has register_shrinker])
+LB_LINUX_TRY_COMPILE([
+        #include <linux/mm.h>
+],[
+        register_shrinker(NULL);
+], [
+        AC_MSG_RESULT([yes])
+        AC_DEFINE(HAVE_REGISTER_SHRINKER, 1,
+                [kernel has register_shrinker])
+],[
+        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([
+#ifdef HAVE_LINUX_EXPORTFS_H
+        #include <linux/exportfs.h>
+#else
+        #include <linux/fs.h>
+#endif
+],[
+        struct export_operations exp;
+
+        exp.fh_to_dentry   = NULL;
+], [
+        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 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 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   = NULL;
+], [
+        AC_MSG_RESULT([yes])
+        AC_DEFINE(HAVE_PROCFS_DELETED, 1,
+                [kernel has deleted member in procfs entry struct])
+],[
+        AC_MSG_RESULT([no])
+])
+])
+
+# 2.6.25 change define to inline
+AC_DEFUN([LC_MAPPING_CAP_WRITEBACK_DIRTY],
+[AC_MSG_CHECKING([if kernel have mapping_cap_writeback_dirty])
+LB_LINUX_TRY_COMPILE([
+        #include <linux/backing-dev.h>
+],[
+        #ifndef mapping_cap_writeback_dirty
+        mapping_cap_writeback_dirty(NULL);
+        #endif
+],[
+        AC_MSG_RESULT([yes])
+        AC_DEFINE(HAVE_MAPPING_CAP_WRITEBACK_DIRTY, 1,
+                [kernel have mapping_cap_writeback_dirty])
+],[
+        AC_MSG_RESULT([no])
+])
+])
+
+
+
+# 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 path path;
+        struct fs_struct fs;
+
+        fs.pwd = path;
+], [
+        AC_MSG_RESULT([yes])
+        AC_DEFINE(HAVE_FS_STRUCT_USE_PATH, 1,
+                [fs_struct use path structure])
+],[
+        AC_MSG_RESULT([no])
+])
+])
+
+#
+# LC_VFS_INTENT_PATCHES
+#
+# check if the kernel has the VFS intent patches
+AC_DEFUN([LC_VFS_INTENT_PATCHES],
+[AC_MSG_CHECKING([if the kernel has the VFS intent patches])
+LB_LINUX_TRY_COMPILE([
+       #include <linux/fs.h>
+        #include <linux/namei.h>
+],[
+        struct nameidata nd;
+        struct lookup_intent *it;
+
+        it = &nd.intent;
+        intent_init(it, IT_OPEN);
+        it->d.lustre.it_disposition = 0;
+        it->d.lustre.it_data = NULL;
+],[
+        AC_MSG_RESULT([yes])
+        AC_DEFINE(HAVE_VFS_INTENT_PATCHES, 1, [VFS intent patches are applied])
+],[
+        AC_MSG_RESULT([no])
+])
+])
+
+AC_DEFUN([LC_S_TIME_GRAN],
+[AC_MSG_CHECKING([if super block has s_time_gran member])
+LB_LINUX_TRY_COMPILE([
+        #include <linux/fs.h>
+],[
+       struct super_block sb;
+
+        return sb.s_time_gran;
+],[
+       AC_MSG_RESULT([yes])
+       AC_DEFINE(HAVE_S_TIME_GRAN, 1, [super block has s_time_gran member])
+],[
+        AC_MSG_RESULT([no])
+])
+])
+
+AC_DEFUN([LC_SB_TIME_GRAN],
+[AC_MSG_CHECKING([if kernel has old get_sb_time_gran])
+LB_LINUX_TRY_COMPILE([
+        #include <linux/fs.h>
+],[
+       return get_sb_time_gran(NULL);
+],[
+        AC_MSG_RESULT([yes])
+       AC_DEFINE(HAVE_SB_TIME_GRAN, 1, [kernel has old get_sb_time_gran])
+],[
+        AC_MSG_RESULT([no])
+])
+])
+
+#
+# LC_FUNC_GRAB_CACHE_PAGE_NOWAIT_GFP
+#
+# Check for our patched grab_cache_page_nowait_gfp() function
+# after 2.6.29 we can emulate this using add_to_page_cache_lru()
+#
+AC_DEFUN([LC_FUNC_GRAB_CACHE_PAGE_NOWAIT_GFP],
+[LB_CHECK_SYMBOL_EXPORT([grab_cache_page_nowait_gfp],
+[mm/filemap.c],[
+        AC_DEFINE(HAVE_GRAB_CACHE_PAGE_NOWAIT_GFP, 1,
+                  [kernel exports grab_cache_page_nowait_gfp])
+        ],
+        [LB_CHECK_SYMBOL_EXPORT([add_to_page_cache_lru],
+        [mm/filemap.c],[
+                AC_DEFINE(HAVE_ADD_TO_PAGE_CACHE_LRU, 1,
+                        [kernel exports add_to_page_cache_lru])
+        ],[
+        ])
+        ])
+])
+
+# ~2.6.12 merge patch from oracle to convert tree_lock from spinlock to rwlock
+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>
+],[
+       struct address_space a;
+
+       write_lock(&a.tree_lock);
+],[
+        AC_MSG_RESULT([yes])
+       AC_DEFINE(HAVE_RW_TREE_LOCK, 1, [kernel has tree_lock as rw_lock])
+],[
+        AC_MSG_RESULT([no])
+])
+EXTRA_KCFLAGS="$tmp_flags"
+])
+
+AC_DEFUN([LC_CONST_ACL_SIZE],
+[AC_MSG_CHECKING([calc acl size])
+tmp_flags="$CFLAGS"
+CFLAGS="$CFLAGS -I$LINUX/include -I$LINUX_OBJ/include -I$LINUX_OBJ/include2 $EXTRA_KCFLAGS"
+AC_TRY_RUN([
+#define __KERNEL__
+#include <linux/autoconf.h>
+#include <linux/types.h>
+#undef __KERNEL__
+// block include
+#define __LINUX_POSIX_ACL_H
+
+# ifdef CONFIG_FS_POSIX_ACL
+#  ifdef HAVE_XATTR_ACL
+#   include <linux/xattr_acl.h>
+#  endif
+#  ifdef HAVE_LINUX_POSIX_ACL_XATTR_H
+#   include <linux/posix_acl_xattr.h>
+#  endif
+# endif
+
+#include <lustre_acl.h>
+
+#include <stdio.h>
+
+int main(void)
+{
+    int size = mds_xattr_acl_size(LUSTRE_POSIX_ACL_MAX_ENTRIES);
+    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 computed])
+])
+CFLAGS="$tmp_flags"
+])
+
+#
+# check for crypto API
+#
+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, 0 );
+],[
+        AC_MSG_RESULT([yes])
+        AC_DEFINE(HAVE_ASYNC_BLOCK_CIPHER, 1, [kernel has block cipher support])
+],[
+        AC_MSG_RESULT([no])
+])
+])
+
+#
+# check for struct hash_desc
+#
+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>
+],[
+        struct hash_desc foo;
+],[
+        AC_MSG_RESULT([yes])
+        AC_DEFINE(HAVE_STRUCT_HASH_DESC, 1, [kernel has struct hash_desc])
+],[
+        AC_MSG_RESULT([no])
+])
+])
+
+#
+# check for struct blkcipher_desc
+#
+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;
+],[
+        AC_MSG_RESULT([yes])
+        AC_DEFINE(HAVE_STRUCT_BLKCIPHER_DESC, 1, [kernel has struct blkcipher_desc])
+],[
+        AC_MSG_RESULT([no])
+])
+])
+
+#
+# 2.6.19 check for FS_RENAME_DOES_D_MOVE flag
+#
+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 = FS_RENAME_DOES_D_MOVE;
+],[
+        AC_MSG_RESULT([yes])
+        AC_DEFINE(HAVE_FS_RENAME_DOES_D_MOVE, 1, [kernel has FS_RENAME_DOES_D_MOVE flag])
+],[
+        AC_MSG_RESULT([no])
+])
+])
+
+#
+# LC_FUNC_F_OP_FLOCK
+#
+# rhel4.2 kernel has f_op->flock field
+#
+AC_DEFUN([LC_FUNC_F_OP_FLOCK],
+[AC_MSG_CHECKING([if struct file_operations has flock field])
+LB_LINUX_TRY_COMPILE([
+        #include <linux/fs.h>
+],[
+        struct file_operations ll_file_operations_flock;
+        ll_file_operations_flock.flock = NULL;
+],[
+        AC_DEFINE(HAVE_F_OP_FLOCK, 1,
+                [struct file_operations has flock field])
+        AC_MSG_RESULT([yes])
+],[
+        AC_MSG_RESULT([no])
+])
+])
+
+# vfs_symlink seems to have started out with 3 args until 2.6.7 where a
+# "mode" argument was added, but then again, in some later version it was
+# removed
+AC_DEFUN([LC_4ARGS_VFS_SYMLINK],
+[AC_MSG_CHECKING([if vfs_symlink wants 4 args])
+LB_LINUX_TRY_COMPILE([
+       #include <linux/fs.h>
+],[
+       struct inode *dir;
+       struct dentry *dentry;
+       const char *oldname = NULL;
+       int mode = 0;
+
+       vfs_symlink(dir, dentry, oldname, mode);
+],[
+        AC_MSG_RESULT(yes)
+        AC_DEFINE(HAVE_4ARGS_VFS_SYMLINK, 1,
+                  [vfs_symlink wants 4 args])
+],[
+        AC_MSG_RESULT(no)
+])
+])
+
+# 2.6.23 has new shrinker API
+AC_DEFUN([LC_REGISTER_SHRINKER],
+[LB_CHECK_SYMBOL_EXPORT([register_shrinker],
+[mm/vmscan.c],[
+        AC_DEFINE(HAVE_REGISTER_SHRINKER, 1,
+                  [kernel exports register_shrinker])
+],[
+])
+])
+
+#2.6.27
+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;
+
+        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 has file_remove_suid instead of remove_suid
+AC_DEFUN([LC_FILE_REMOVE_SUID],
+[AC_MSG_CHECKING([kernel has file_remove_suid])
+LB_LINUX_TRY_COMPILE([
+        #include <linux/fs.h>
+],[
+        file_remove_suid(NULL);
+],[
+        AC_DEFINE(HAVE_FILE_REMOVE_SUID, 1,
+                  [kernel have file_remove_suid])
+        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])
+])
+])
+
+# vfs_symlink seems to have started out with 3 args until 2.6.7 where a
+# "mode" argument was added, but then again, in some later version it was
+# removed
+AC_DEFUN([LC_4ARGS_VFS_SYMLINK],
+[AC_MSG_CHECKING([if vfs_symlink wants 4 args])
+LB_LINUX_TRY_COMPILE([
+       #include <linux/fs.h>
+],[
+       struct inode *dir;
+       struct dentry *dentry;
+       const char *oldname = NULL;
+       int mode = 0;
+
+       vfs_symlink(dir, dentry, oldname, mode);
+],[
+        AC_MSG_RESULT(yes)
+        AC_DEFINE(HAVE_4ARGS_VFS_SYMLINK, 1,
+                  [vfs_symlink wants 4 args])
+],[
+        AC_MSG_RESULT(no)
+])
+])
+
+# 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 = 0;
+],[
+        AC_DEFINE(HAVE_BI_HW_SEGMENTS, 1,
+                [struct bio has a bi_hw_segments field])
+        AC_MSG_RESULT([yes])
+],[
+        AC_MSG_RESULT([no])
+])
+])
+
+# 2.6.27 sles11 move the quotaio_v1.h to fs
+AC_DEFUN([LC_HAVE_QUOTAIO_V1_H],
+[LB_CHECK_FILE([$LINUX/include/linux/quotaio_v1.h],[
+        AC_DEFINE(HAVE_QUOTAIO_V1_H, 1,
+                [kernel has include/linux/quotaio_v1.h])
+],[
+        AC_MSG_RESULT([no])
+])
+])
+
+# sles10 sp2 need 5 parameter for vfs_symlink
+AC_DEFUN([LC_VFS_SYMLINK_5ARGS],
+[AC_MSG_CHECKING([vfs_symlink need 5 parameter])
+LB_LINUX_TRY_COMPILE([
+        #include <linux/fs.h>
+],[
+        struct inode *dir = NULL;
+        struct dentry *dentry = NULL;
+        struct vfsmount *mnt = NULL;
+        const char * path = NULL;
+        vfs_symlink(dir, dentry, mnt, path, 0);
+],[
+        AC_DEFINE(HAVE_VFS_SYMLINK_5ARGS, 1,
+                [vfs_symlink need 5 parameteres])
+        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 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_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/quota.h>
+],[
+        struct quotactl_ops *qop;
+        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/quota.h>
+],[
+        struct quotactl_ops *qop;
+        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_LINUX_FIEMAP_H
+#
+# If we have fiemap.h
+# after 2.6.27 use fiemap.h in include/linux
+#
+AC_DEFUN([LC_LINUX_FIEMAP_H],
+[LB_CHECK_FILE([$LINUX/include/linux/fiemap.h],[
+        AC_MSG_CHECKING([if fiemap.h can be compiled])
+        LB_LINUX_TRY_COMPILE([
+                #include <linux/types.h>
+                #include <linux/fiemap.h>
+        ],[],[
+                AC_MSG_RESULT([yes])
+                AC_DEFINE(HAVE_LINUX_FIEMAP_H, 1, [Kernel has fiemap.h])
+        ],[
+                AC_MSG_RESULT([no])
+        ])
+],
+[])
+])
+
+#
+# LC_PROG_LINUX
+#
+# Lustre linux kernel checks
+#
+AC_DEFUN([LC_PROG_LINUX],
+         [LC_LUSTRE_VERSION_H
+         if test x$enable_server = xyes ; then
+             AC_DEFINE(HAVE_SERVER_SUPPORT, 1, [support server])
+             LC_FUNC_DEV_SET_RDONLY
+             LC_STACK_SIZE
+             LC_CONFIG_BACKINGFS
+         fi
+         LC_CONFIG_PINGER
+         LC_CONFIG_CHECKSUM
+         LC_CONFIG_LIBLUSTRE_RECOVERY
+         LC_CONFIG_HEALTH_CHECK_WRITE
+         LC_CONFIG_LRU_RESIZE
+         LC_QUOTA_MODULE
+
+         # RHEL4 patches
+         LC_EXPORT_TRUNCATE_COMPLETE
+         LC_EXPORT_TRUNCATE_RANGE
+         LC_EXPORT_D_REHASH_COND
+         LC_EXPORT___D_REHASH
+         LC_EXPORT_D_MOVE_LOCKED
+         LC_EXPORT___D_MOVE
+         LC_EXPORT_NODE_TO_CPUMASK
+
+         LC_HEADER_LDISKFS_XATTR
+         LC_FUNC_GRAB_CACHE_PAGE_NOWAIT_GFP
+         LC_STRUCT_STATFS
+         LC_FILEMAP_POPULATE
+         LC_D_ADD_UNIQUE
+         LC_BIT_SPINLOCK_H
+
+         LC_XATTR_ACL
+         LC_POSIX_ACL_XATTR_H
+         LC_CONST_ACL_SIZE
+
+         LC_STRUCT_INTENT_FILE
+
+         LC_CAPA_CRYPTO
+         LC_CONFIG_RMTCLIENT
+         LC_CONFIG_GSS
+         LC_FUNC_MS_FLOCK_LOCK
+         LC_FUNC_HAVE_CAN_SLEEP_ARG
+         LC_FUNC_F_OP_FLOCK
+         LC_QUOTA_READ
+         LC_COOKIE_FOLLOW_LINK
+         LC_FUNC_RCU
+         LC_PERCPU_COUNTER
+         LC_QUOTA64
+         LC_4ARGS_VFS_SYMLINK
+
+         # does the kernel have VFS intent patches?
+         LC_VFS_INTENT_PATCHES
+
+         # ~2.6.11
+         LC_S_TIME_GRAN
+         LC_SB_TIME_GRAN
+
+         # 2.6.12
+         LC_RW_TREE_LOCK
+         LC_EXPORT_SYNCHRONIZE_RCU
+
+         # 2.6.15
+         LC_INODE_I_MUTEX
+
+         # 2.6.16
+         LC_SECURITY_PLUG  # for SLES10 SP2
+
+         # 2.6.17
+         LC_INODE_IPRIVATE
+         LC_DQUOTOFF_MUTEX
+
+         # 2.6.18
+         LC_NR_PAGECACHE
+         LC_STATFS_DENTRY_PARAM
+         LC_VFS_KERN_MOUNT
+         LC_INVALIDATEPAGE_RETURN_INT
+         LC_UMOUNTBEGIN_HAS_VFSMOUNT
+         LC_SEQ_LOCK
+         LC_EXPORT_FILEMAP_FDATAWRITE_RANGE
+         if test x$enable_server = xyes ; then
+                LC_EXPORT_INVALIDATE_MAPPING_PAGES
+         fi
+
+         #2.6.18 + RHEL5 (fc6)
+         LC_PG_FS_MISC
+         LC_PAGE_CHECKED
+         LC_LINUX_FIEMAP_H
+
+         # 2.6.19
+         LC_INODE_BLKSIZE
+         LC_VFS_READDIR_U64_INO
+         LC_FILE_WRITEV
+         LC_FILE_READV
+
+         # 2.6.20
+         LC_CANCEL_DIRTY_PAGE
+
+         # raid5-zerocopy patch
+         LC_PAGE_CONSTANT
+
+        # 2.6.22
+         LC_INVALIDATE_BDEV_2ARG
+         LC_ASYNC_BLOCK_CIPHER
+         LC_STRUCT_HASH_DESC
+         LC_STRUCT_BLKCIPHER_DESC
+         LC_FS_RENAME_DOES_D_MOVE
+         # 2.6.23
+         LC_UNREGISTER_BLKDEV_RETURN_INT
+         LC_KERNEL_SPLICE_READ
+         LC_KERNEL_SENDFILE
+         LC_HAVE_EXPORTFS_H
+         LC_VM_OP_FAULT
+         LC_REGISTER_SHRINKER
+  
+        # 2.6.24
+        LC_HAVE_MMTYPES_H
+         LC_BIO_ENDIO_2ARG
+         LC_FH_TO_DENTRY
+         LC_PROCFS_DELETED
+
+         #2.6.25
+         LC_MAPPING_CAP_WRITEBACK_DIRTY
+  
+         # 2.6.26
+         LC_FS_STRUCT_USE_PATH
+
+         # 2.6.27
+         LC_INODE_PERMISION_2ARGS
+         LC_FILE_REMOVE_SUID
+         LC_TRYLOCKPAGE
+         LC_READ_INODE_IN_SBOPS
+         LC_EXPORT_INODE_PERMISSION
+         LC_QUOTA_ON_5ARGS
+         LC_QUOTA_OFF_3ARGS
+         LC_VFS_DQ_OFF
+
+         # 2.6.27.15-2 sles11
+         LC_BI_HW_SEGMENTS
+         LC_HAVE_QUOTAIO_V1_H
+         LC_VFS_SYMLINK_5ARGS
+         LC_SB_ANY_QUOTA_ACTIVE
+         LC_SB_HAS_QUOTA_ACTIVE
+])
+
+#
+# LC_CONFIG_CLIENT_SERVER
+#
+# Build client/server sides of Lustre
+#
+AC_DEFUN([LC_CONFIG_CLIENT_SERVER],
+[AC_MSG_CHECKING([whether to build Lustre server support])
+AC_ARG_ENABLE([server],
+       AC_HELP_STRING([--disable-server],
+                       [disable Lustre server support]),
+       [],[enable_server='yes'])
+AC_MSG_RESULT([$enable_server])
+
+AC_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([$enable_client])])
+
+#
+# LC_CONFIG_LIBLUSTRE
+#
+# whether to build liblustre
+#
+AC_DEFUN([LC_CONFIG_LIBLUSTRE],
+[AC_MSG_CHECKING([whether to build Lustre library])
+AC_ARG_ENABLE([liblustre],
+       AC_HELP_STRING([--disable-liblustre],
+                       [disable building of Lustre library]),
+       [],[enable_liblustre=$with_sysio])
+AC_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
+AC_MSG_RESULT([$enable_liblustre_tests])
+
+AC_MSG_CHECKING([whether to enable liblustre acl])
+AC_ARG_ENABLE([liblustre-acl],
+       AC_HELP_STRING([--disable-liblustre-acl],
+                       [disable ACL support for liblustre]),
+       [],[enable_liblustre_acl=yes])
+AC_MSG_RESULT([$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])
+])
+])
+
+#
+# --enable-mpitest
+#
+AC_ARG_ENABLE(mpitests,
+       AC_HELP_STRING([--enable-mpitests=yes|no|mpicc wrapper],
+                           [include mpi tests]),
+       [
+        enable_mpitests=yes
+         case $enableval in
+         yes)
+               MPICC_WRAPPER=mpicc
+               ;;
+         no)
+               enable_mpitests=no
+               ;;
+         *)
+               MPICC_WRAPPER=$enableval
+                 ;;
+        esac
+       ],
+       [
+       MPICC_WRAPPER=mpicc
+       enable_mpitests=yes
+       ]
+)
+
+if test x$enable_mpitests != xno; then
+       AC_MSG_CHECKING([whether mpitests can be built])
+       oldcc=$CC
+       CC=$MPICC_WRAPPER
+       AC_LINK_IFELSE(
+           [AC_LANG_PROGRAM([[
+                   #include <mpi.h>
+               ]],[[
+                   int flag;
+                   MPI_Initialized(&flag);
+               ]])],
+           [
+                   AC_MSG_RESULT([yes])
+           ],[
+                   AC_MSG_RESULT([no])
+                   enable_mpitests=no
+       ])
+       CC=$oldcc
 fi
-if test x$enable_quota != xno; then
-   AC_DEFINE(HAVE_QUOTA_SUPPORT, 1, [Enable quota support])
+AC_SUBST(MPICC_WRAPPER)
+
+AC_MSG_NOTICE([Enabling Lustre configure options for libsysio])
+ac_configure_args="$ac_configure_args --with-lustre-hack --with-sockets"
+
+LC_CONFIG_PINGER
+LC_CONFIG_LIBLUSTRE_RECOVERY
+])
+
+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'])
+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
 ])
+
 #
-# LC_CONFIG_SPLIT
+# LC_CONFIG_QUOTA
 #
-# whether to enable split support
+# whether to enable quota support global control
 #
-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'])
-AC_MSG_RESULT([$enable_split])
-if test x$enable_split != xno; then
-   AC_DEFINE(HAVE_SPLIT_SUPPORT, 1, [enable split support])
+AC_DEFUN([LC_CONFIG_QUOTA],
+[AC_ARG_ENABLE([quota],
+       AC_HELP_STRING([--enable-quota],
+                       [enable quota support]),
+       [],[enable_quota='yes'])
+])
+
+# whether to enable quota support(kernel modules)
+AC_DEFUN([LC_QUOTA_MODULE],
+[if test x$enable_quota != xno; then
+    LB_LINUX_CONFIG([QUOTA],[
+       enable_quota_module='yes'
+       AC_DEFINE(HAVE_QUOTA_SUPPORT, 1, [Enable quota support])
+    ],[
+       enable_quota_module='no'
+       AC_MSG_WARN([quota is not enabled because the kernel - lacks quota support])
+    ])
 fi
 ])
+
+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])])
+])
+
 AC_DEFUN([LC_QUOTA_READ],
 [AC_MSG_CHECKING([if kernel supports quota_read])
 LB_LINUX_TRY_COMPILE([
@@ -1337,6 +2192,23 @@ LB_LINUX_TRY_COMPILE([
 ])
 
 #
+# LC_CONFIG_SPLIT
+#
+# 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'])
+AC_MSG_RESULT([$enable_split])
+if test x$enable_split != xno; then
+   AC_DEFINE(HAVE_SPLIT_SUPPORT, 1, [enable split support])
+fi
+])
+
+#
 # LC_COOKIE_FOLLOW_LINK
 #
 # kernel 2.6.13+ ->follow_link returns a cookie
@@ -1363,7 +2235,7 @@ LB_LINUX_TRY_COMPILE([
 #
 # LC_FUNC_RCU
 #
-# kernels prior than 2.6.0(?) have no RCU supported; in kernel 2.6.5(SUSE), 
+# kernels prior than 2.6.0(?) have no RCU supported; in kernel 2.6.5(SUSE),
 # call_rcu takes three parameters.
 #
 AC_DEFUN([LC_FUNC_RCU],
@@ -1384,7 +2256,93 @@ LB_LINUX_TRY_COMPILE([
                 AC_DEFINE(HAVE_CALL_RCU_PARAM, 1, [call_rcu takes three parameters])
                 AC_MSG_RESULT([yes])
         ],[
-                AC_MSG_RESULT([no]) 
+                AC_MSG_RESULT([no])
+        ])
+
+],[
+        AC_MSG_RESULT([no])
+])
+])
+
+#
+# LC_QUOTA64
+# linux kernel have 64-bit limits support
+#
+AC_DEFUN([LC_QUOTA64],
+[if test x$enable_quota_module = xyes -a x$enable_server = xyes ; then
+        AC_MSG_CHECKING([if kernel has 64-bit quota limits support])
+        LB_LINUX_TRY_COMPILE([
+                #include <linux/kernel.h>
+                #include <linux/fs.h>
+                #include <linux/quotaio_v2.h>
+                int versions[] = V2_INITQVERSIONS_R1;
+                struct v2_disk_dqblk_r1 dqblk_r1;
+        ],[],[
+                AC_DEFINE(HAVE_QUOTA64, 1, [have quota64])
+                AC_MSG_RESULT([yes])
+        ],[
+        tmp_flags="$EXTRA_KCFLAGS"
+        EXTRA_KCFLAGS="-I $LINUX/fs"
+        LB_LINUX_TRY_COMPILE([
+                #include <linux/kernel.h>
+                #include <linux/fs.h>
+                #include <quotaio_v2.h>
+                struct v2r1_disk_dqblk dqblk_r1;
+        ],[],[
+                AC_DEFINE(HAVE_QUOTA64, 1, [have quota64])
+                AC_MSG_RESULT([yes])
+        ],[
+                LB_CHECK_FILE([$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
+        ])
+fi
+])
+
+# LC_SECURITY_PLUG  # for SLES10 SP2
+# 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>
+],[
+        struct dentry   *dentry;
+        struct vfsmount *mnt;
+        struct iattr    *iattr;
+
+        notify_change(dentry, mnt, iattr);
+],[
+        AC_MSG_RESULT(yes)
+        AC_DEFINE(HAVE_SECURITY_PLUG, 1,
+                [SLES10 SP2 use extra parameter in vfs])
+],[
+        AC_MSG_RESULT(no)
+])
+])
+
+AC_DEFUN([LC_PERCPU_COUNTER],
+[AC_MSG_CHECKING([if have struct percpu_counter defined])
+LB_LINUX_TRY_COMPILE([
+        #include <linux/percpu_counter.h>
+],[],[
+        AC_DEFINE(HAVE_PERCPU_COUNTER, 1, [percpu_counter found])
+        AC_MSG_RESULT([yes])
+
+        AC_MSG_CHECKING([if percpu_counter_inc takes the 2nd argument])
+        LB_LINUX_TRY_COMPILE([
+                #include <linux/percpu_counter.h>
+        ],[
+                struct percpu_counter c;
+                percpu_counter_init(&c, 0);
+        ],[
+                AC_DEFINE(HAVE_PERCPU_2ND_ARG, 1, [percpu_counter_init has two
+                                                   arguments])
+                AC_MSG_RESULT([yes])
+        ],[
+                AC_MSG_RESULT([no])
         ])
 ],[
         AC_MSG_RESULT([no])
@@ -1399,12 +2357,12 @@ LB_LINUX_TRY_COMPILE([
 AC_DEFUN([LC_CONFIGURE],
 [LC_CONFIG_OBD_BUFFER_SIZE
 
-# include/liblustre.h
-AC_CHECK_HEADERS([asm/page.h sys/user.h sys/vfs.h stdint.h blkid/blkid.h])
+if test $target_cpu == "i686" -o $target_cpu == "x86_64"; then
+        CFLAGS="$CFLAGS -Werror"
+fi
 
-# include/lustre/lustre_user.h
-# See note there re: __ASM_X86_64_PROCESSOR_H
-AC_CHECK_HEADERS([linux/quota.h])
+# include/liblustre.h
+AC_CHECK_HEADERS([sys/user.h sys/vfs.h stdint.h blkid/blkid.h])
 
 # liblustre/llite_lib.h
 AC_CHECK_HEADERS([xtio.h file.h])
@@ -1419,9 +2377,30 @@ 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
+AC_CHECK_HEADERS([linux/random.h], [], [],
+                 [#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_SUBST(ZLIB)
+
 # Super safe df
 AC_ARG_ENABLE([mindf],
       AC_HELP_STRING([--enable-mindf],
@@ -1441,6 +2420,32 @@ if test x$enable_fail_alloc != xno ; then
         AC_DEFINE([RANDOM_FAIL_ALLOC], 1, [enable randomly alloc failure])
 fi
 
+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_MSG_RESULT([$enable_invariants])
+if test x$enable_invariants = xyes ; then
+        AC_DEFINE([INVARIANT_CHECK], 1, [enable invariant checking])
+fi
+
+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_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
+
+         #2.6.29
+         LC_WRITE_BEGIN_END
+         LC_D_OBTAIN_ALIAS
+         LC_BLKDEV_PUT_2ARGS
+         LC_DENTRY_OPEN_4ARGS
+
 ])
 
 #
@@ -1455,11 +2460,13 @@ 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$enable_client = xyes)
 AM_CONDITIONAL(SERVER, test x$enable_server = xyes)
-AM_CONDITIONAL(QUOTA, test x$enable_quota = xyes)
+AM_CONDITIONAL(QUOTA, test x$enable_quota_module = xyes)
 AM_CONDITIONAL(SPLIT, test x$enable_split = xyes)
 AM_CONDITIONAL(BLKID, test x$ac_cv_header_blkid_blkid_h = xyes)
 AM_CONDITIONAL(EXT2FS_DEVEL, test x$ac_cv_header_ext2fs_ext2fs_h = xyes)
 AM_CONDITIONAL(GSS, test x$enable_gss = xyes)
+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)
 ])
 
@@ -1479,19 +2486,24 @@ lustre/include/Makefile
 lustre/include/lustre_ver.h
 lustre/include/linux/Makefile
 lustre/include/lustre/Makefile
-lustre/kernel_patches/targets/2.6-suse.target
 lustre/kernel_patches/targets/2.6-vanilla.target
 lustre/kernel_patches/targets/2.6-rhel4.target
+lustre/kernel_patches/targets/2.6-rhel5.target
 lustre/kernel_patches/targets/2.6-fc5.target
 lustre/kernel_patches/targets/2.6-patchless.target
 lustre/kernel_patches/targets/2.6-sles10.target
+lustre/kernel_patches/targets/2.6-sles11.target
+lustre/kernel_patches/targets/2.6-oel5.target
+lustre/kernel_patches/targets/2.6-fc11.target
 lustre/ldlm/Makefile
 lustre/fid/Makefile
 lustre/fid/autoMakefile
 lustre/liblustre/Makefile
 lustre/liblustre/tests/Makefile
+lustre/liblustre/tests/mpi/Makefile
 lustre/llite/Makefile
 lustre/llite/autoMakefile
+lustre/lclient/Makefile
 lustre/lov/Makefile
 lustre/lov/autoMakefile
 lustre/lvfs/Makefile
@@ -1534,15 +2546,10 @@ lustre/ptlrpc/gss/autoMakefile
 lustre/quota/Makefile
 lustre/quota/autoMakefile
 lustre/scripts/Makefile
-lustre/scripts/version_tag.pl
 lustre/tests/Makefile
+lustre/tests/mpi/Makefile
 lustre/utils/Makefile
 lustre/utils/gss/Makefile
+lustre/obdclass/darwin/Makefile
 ])
-case $lb_target_os in
-        darwin)
-                AC_CONFIG_FILES([ lustre/obdclass/darwin/Makefile ])
-                ;;
-esac
-
 ])