+# 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);
+],[
+ AC_MSG_RESULT([yes])
+ AC_DEFINE(HAVE_INVALIDATE_BDEV_2ARG, 1,
+ [invalidate_bdev has second argument])
+],[
+ AC_MSG_RESULT([no])
+])
+])
+
+# 2.6.18
+
+
+# 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])
+])
+])
+
+# 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;
+
+ file.sendfile = NULL;
+], [
+ AC_MSG_RESULT([yes])
+ AC_DEFINE(HAVE_KERNEL_SENDFILE, 1,
+ [kernel has .sendfile])
+],[
+ AC_MSG_RESULT([no])
+])
+])
+
+# 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;
+
+ file.splice_read = NULL;
+], [
+ AC_MSG_RESULT([yes])
+ AC_DEFINE(HAVE_KERNEL_SPLICE_READ, 1,
+ [kernel has .slice_read])
+],[
+ AC_MSG_RESULT([no])
+])
+])
+
+# 2.6.23 extract nfs export related data into exportfs.h
+AC_DEFUN([LC_HAVE_EXPORTFS_H],
+[LB_CHECK_FILE([$LINUX/include/linux/exportfs.h], [
+ AC_DEFINE(HAVE_LINUX_EXPORTFS_H, 1,
+ [kernel has include/exportfs.h])
+],[
+ AC_MSG_RESULT([no])
+])
+])
+
+# 2.6.23 has new page fault handling API
+AC_DEFUN([LC_VM_OP_FAULT],
+[AC_MSG_CHECKING([kernel has .fault in vm_operation_struct])
+LB_LINUX_TRY_COMPILE([
+ #include <linux/mm.h>
+],[
+ struct vm_operations_struct op;
+
+ op.fault = NULL;
+], [
+ AC_MSG_RESULT([yes])
+ AC_DEFINE(HAVE_VM_OP_FAULT, 1,
+ [kernel has .fault in vm_operation_struct])
+],[
+ AC_MSG_RESULT([no])
+])
+])
+
+#2.6.23 has new shrinker API
+AC_DEFUN([LC_REGISTER_SHRINKER],
+[AC_MSG_CHECKING([if kernel has register_shrinker])
+LB_LINUX_TRY_COMPILE([
+ #include <linux/mm.h>
+],[
+ register_shrinker(NULL);
+], [
+ AC_MSG_RESULT([yes])
+ AC_DEFINE(HAVE_REGISTER_SHRINKER, 1,
+ [kernel has register_shrinker])
+],[
+ AC_MSG_RESULT([no])
+])
+])
+
+# 2.6.24 has bio_endio with 2 args
+AC_DEFUN([LC_BIO_ENDIO_2ARG],
+[AC_MSG_CHECKING([if kernel has bio_endio with 2 args])
+LB_LINUX_TRY_COMPILE([
+ #include <linux/bio.h>
+],[
+ bio_endio(NULL, 0);
+], [
+ AC_MSG_RESULT([yes])
+ AC_DEFINE(HAVE_BIO_ENDIO_2ARG, 1,
+ [kernel has bio_endio with 2 args])
+],[
+ AC_MSG_RESULT([no])
+])
+])
+
+# 2.6.24 has new members in exports struct.
+AC_DEFUN([LC_FH_TO_DENTRY],
+[AC_MSG_CHECKING([if kernel has .fh_to_dentry member in export_operations struct])
+LB_LINUX_TRY_COMPILE([
+#ifdef HAVE_LINUX_EXPORTFS_H
+ #include <linux/exportfs.h>
+#else
+ #include <linux/fs.h>
+#endif
+],[
+ struct export_operations exp;
+
+ exp.fh_to_dentry = NULL;
+], [
+ AC_MSG_RESULT([yes])
+ AC_DEFINE(HAVE_FH_TO_DENTRY, 1,
+ [kernel has .fh_to_dentry member in export_operations struct])
+],[
+ AC_MSG_RESULT([no])
+])
+])
+
+# 2.6.24 need linux/mm_types.h included
+AC_DEFUN([LC_HAVE_MMTYPES_H],
+[LB_CHECK_FILE([$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$LINUX_OBJ/include2 -I$LINUX/arch/`uname -m|sed -e 's/ppc.*/powerpc/' -e 's/x86_64/x86/' -e 's/i.86/x86/'`/include $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])