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LU-12400 llite: Use the new vm_fault_t type
[fs/lustre-release.git] / lustre / autoconf / lustre-core.m4
index 9d74fcd..635563f 100644 (file)
@@ -47,23 +47,6 @@ 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([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=$with_obd_buffer_size],
-       [OBD_BUFFER_SIZE=8192])
-AC_MSG_RESULT([$OBD_BUFFER_SIZE bytes])
-AC_DEFINE_UNQUOTED(CONFIG_LUSTRE_OBD_MAX_IOCTL_BUFFER, $OBD_BUFFER_SIZE,
-       [IOCTL Buffer Size])
-]) # LC_CONFIG_OBD_BUFFER_SIZE
-
-#
 # LC_GLIBC_SUPPORT_FHANDLES
 #
 AC_DEFUN([LC_GLIBC_SUPPORT_FHANDLES], [
@@ -74,19 +57,6 @@ AC_CHECK_FUNCS([name_to_handle_at],
 ]) # LC_GLIBC_SUPPORT_FHANDLES
 
 #
-# LC_FUNC_DEV_SET_RDONLY
-#
-# 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_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 the stack size is at least 8k in Lustre server (all kernels)
@@ -153,6 +123,22 @@ AS_IF([test "x$enable_checksum" != xno],
 ]) # LC_CONFIG_CHECKSUM
 
 #
+# LC_CONFIG_FLOCK
+#
+# enable distributed flock by default
+#
+AC_DEFUN([LC_CONFIG_FLOCK], [
+AC_MSG_CHECKING([whether to enable flock by default])
+AC_ARG_ENABLE([flock],
+       AC_HELP_STRING([--disable-flock],
+               [disable flock by default]),
+       [], [enable_flock="yes"])
+AC_MSG_RESULT([$enable_flock])
+AS_IF([test "x$enable_flock" != xno],
+       [AC_DEFINE(ENABLE_FLOCK, 1, [enable flock by default])])
+]) # LC_CONFIG_FLOCK
+
+#
 # LC_CONFIG_HEALTH_CHECK_WRITE
 #
 # Turn off the actual write to the disk
@@ -335,33 +321,65 @@ AS_IF([test "x$enable_gss" != xno], [
                gss_conf_test="failure"
        ])
 
-       AS_IF([test "x$gss_conf_test" = xsuccess], [
+       AS_IF([test "x$gss_conf_test" = xsuccess && test "x$enable_gss" != xno], [
                AC_DEFINE([HAVE_GSS], [1], [Define this is if you enable gss])
                enable_gss="yes"
        ], [
+               enable_gss_keyring="no"
                enable_gss="no"
        ])
+
+       enable_ssk=$enable_gss
+], [
+       enable_gss_keyring="no"
 ])
 ]) # LC_CONFIG_GSS
 
-# LC_HAVE_VOID_OPENSSL_HMAC_FUNCS
+# LC_OPENSSL_SSK
 #
-# OpenSSL 1.0+ return int for HMAC functions but previous versions do not
-AC_DEFUN([LC_HAVE_VOID_OPENSSL_HMAC_FUNCS], [
+# OpenSSL 1.0+ return int for HMAC functions but older SLES11 versions do not
+AC_DEFUN([LC_OPENSSL_SSK], [
+AC_MSG_CHECKING([whether OpenSSL has functions needed for SSK])
+AS_IF([test "x$enable_ssk" != xno], [
 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
        #include <openssl/hmac.h>
        #include <openssl/evp.h>
 
        int main(void) {
                int rc;
-               HMAC_CTX ctx;
-               HMAC_CTX_init(&ctx);
-               rc = HMAC_Init_ex(&ctx, "test", 4, EVP_md_null(), NULL);
+               rc = HMAC_Init_ex(NULL, "test", 4, EVP_md_null(), NULL);
+       }
+])],[AC_DEFINE(HAVE_OPENSSL_SSK, 1,
+              [OpenSSL HMAC functions needed for SSK])],
+       [enable_ssk="no"])
+])
+AC_MSG_RESULT([$enable_ssk])
+]) # LC_OPENSSL_SSK
+
+# LC_OPENSSL_GETSEPOL
+#
+# OpenSSL is needed for l_getsepol
+AC_DEFUN([LC_OPENSSL_GETSEPOL], [
+AC_MSG_CHECKING([whether openssl-devel is present])
+AC_COMPILE_IFELSE([AC_LANG_SOURCE([
+       #include <openssl/evp.h>
+
+       int main(void) {
+               EVP_MD_CTX *mdctx = EVP_MD_CTX_create();
        }
-])],[],[AC_DEFINE(HAVE_VOID_OPENSSL_HMAC_FUNCS, 1,
-               [OpenSSL HMAC functions return void instead of int])
+])],[
+       AC_DEFINE(HAVE_OPENSSL_GETSEPOL, 1, [openssl-devel is present])
+       enable_getsepol="yes"
+
+],[
+       enable_getsepol="no"
+       AC_MSG_WARN([
+
+No openssk-devel headers found, unable to build l_getsepol and SELinux status checking
+])
 ])
-]) # LC_HAVE_VOID_OPENSSL_HMAC_FUNCS
+AC_MSG_RESULT([$enable_getsepol])
+]) # LC_OPENSSL_GETSEPOL
 
 # LC_INODE_PERMISION_2ARGS
 #
@@ -403,6 +421,24 @@ blk_queue_max_segments, [
 ]) # LC_BLK_QUEUE_MAX_SEGMENTS
 
 #
+# LC_HAVE_XATTR_HANDLER_FLAGS
+#
+# 2.6.33 added a private flag to xattr_handler
+#
+AC_DEFUN([LC_HAVE_XATTR_HANDLER_FLAGS], [
+LB_CHECK_COMPILE([if 'struct xattr_handler' has flags field],
+xattr_handler_flags, [
+       #include <linux/xattr.h>
+],[
+       struct xattr_handler handler;
+
+       handler.flags = 0;
+],[
+       AC_DEFINE(HAVE_XATTR_HANDLER_FLAGS, 1, [flags field exist])
+])
+]) # LC_HAVE_XATTR_HANDLER_FLAGS
+
+#
 # LC_HAVE_DQUOT_FS_DISK_QUOTA
 #
 # 2.6.34 has quotactl_ops->[sg]et_dqblk that take struct fs_disk_quota
@@ -493,8 +529,9 @@ LB_CHECK_COMPILE([if '__add_wait_queue_exclusive' exists],
 __add_wait_queue_exclusive, [
        #include <linux/wait.h>
 ],[
-       wait_queue_head_t queue;
-       wait_queue_t      wait;
+       wait_queue_head_t queue = { };
+       wait_queue_t wait = { };
+
        __add_wait_queue_exclusive(&queue, &wait);
 ],[
        AC_DEFINE(HAVE___ADD_WAIT_QUEUE_EXCLUSIVE, 1,
@@ -514,7 +551,10 @@ fs_struct_rwlock, [
        #include <linux/spinlock.h>
        #include <linux/fs_struct.h>
 ],[
-       ((struct fs_struct *)0)->lock = (rwlock_t){ 0 };
+       struct fs_struct fss = { };
+       rwlock_t rwl = { };
+
+       fss.lock = rwl;
 ],[
        AC_DEFINE(HAVE_FS_STRUCT_RWLOCK, 1, [fs_struct.lock use rwlock])
 ])
@@ -539,34 +579,6 @@ super_ops_evict_inode, [
 ]) # LC_SBOPS_EVICT_INODE
 
 #
-# LC_FILE_FSYNC
-#
-# 2.6.35 file_operations.fsync taken 2 arguments.
-# 3.0.0 file_operations.fsync takes 4 arguments.
-#
-AC_DEFUN([LC_FILE_FSYNC], [
-LB_CHECK_COMPILE([if 'file_operations.fsync' takes 4 arguments],
-file_ops_fsync_4args, [
-       #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])
-],[
-       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
-
-#
 # LC_KERNEL_LOCKED
 #
 # 2.6.37 remove kernel_locked
@@ -583,6 +595,39 @@ kernel_locked, [
 ]) # LC_KERNEL_LOCKED
 
 #
+# LC_FS_STRUCT_SEQCOUNT
+#
+# 2.6.37 uses seqlock in fs_struct
+#
+AC_DEFUN([LC_FS_STRUCT_SEQCOUNT], [
+LB_CHECK_COMPILE([if fs_struct use seqcount],
+fs_struct_seqcount, [
+       #include <linux/fs_struct.h>
+],[
+       ((struct fs_struct *)0)->seq = (struct seqcount){ 0 };
+],[
+       AC_DEFINE(HAVE_FS_STRUCT_SEQCOUNT, 1, [fs_struct use seqcount])
+])
+]) # LC_FS_STRUCT_SEQCOUNT
+
+# LC_DENTRY_PATH_RAW
+#
+# Kernel version 2.6.37 commit ec2447c278ee973d35f38e53ca16ba7f965ae33d
+# dentry_path_raw is exported
+#
+AC_DEFUN([LC_DENTRY_PATH_RAW], [
+LB_CHECK_COMPILE([if 'dentry_path_raw' exist],
+dentry_path_raw, [
+       #include <linux/dcache.h>
+],[
+       dentry_path_raw(NULL, NULL, 0);
+],[
+       AC_DEFINE(HAVE_DENTRY_PATH_RAW, 1,
+               ['dentry_path_raw' is available])
+])
+]) # LC_DENTRY_PATH_RAW
+
+#
 # LC_D_COMPARE_7ARGS
 #
 # 2.6.38 dentry_operations.d_compare() taken 7 arguments.
@@ -681,38 +726,24 @@ LB_CHECK_EXPORT([simple_setattr], [fs/libfs.c],
 ]) # LC_EXPORT_SIMPLE_SETATTR
 
 #
-# LC_IOP_TRUNCATE
+# LC_HAVE_BLK_PLUG
 #
-# truncate callback removed since 2.6.39
+# 2.6.38 add struct blk_plug
 #
-AC_DEFUN([LC_IOP_TRUNCATE], [
-LB_CHECK_COMPILE([if 'inode_operations' has '.truncate' member function],
-inode_ops_truncate, [
-       #include <linux/fs.h>
-],[
-       ((struct inode_operations *)0)->truncate(NULL);
-],[
-       AC_DEFINE(HAVE_INODEOPS_TRUNCATE, 1,
-               [inode_operations has .truncate member function])
-])
-]) # LC_IOP_TRUNCATE
-
-#
-# 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, [
+AC_DEFUN([LC_HAVE_BLK_PLUG], [
+LB_CHECK_COMPILE([if 'struct blk_plug' exists],
+blk_plug, [
        #include <linux/blkdev.h>
 ],[
-       do {} while(sizeof(((struct request_queue *)0)->unplug_fn));
+       struct blk_plug plug;
+
+       blk_start_plug(&plug);
+       blk_finish_plug(&plug);
 ],[
-       AC_DEFINE(HAVE_REQUEST_QUEUE_UNPLUG_FN, 1,
-               [request_queue has unplug_fn field])
+       AC_DEFINE(HAVE_BLK_PLUG, 1,
+               [blk_plug struct exists])
 ])
-]) # LC_REQUEST_QUEUE_UNPLUG_FN
+]) # LC_HAVE_BLK_PLUG
 
 #
 # LC_HAVE_FSTYPE_MOUNT
@@ -724,8 +755,10 @@ LB_CHECK_COMPILE([if 'file_system_type' has 'mount' field],
 file_system_type_mount, [
        #include <linux/fs.h>
 ],[
-       struct file_system_type fst;
-       void *i = (void *) fst.mount;
+       struct file_system_type fst = { };
+       void *mount;
+
+       mount = (void *)fst.mount;
 ],[
        AC_DEFINE(HAVE_FSTYPE_MOUNT, 1,
                [struct file_system_type has mount field])
@@ -774,7 +807,7 @@ LB_CHECK_COMPILE([if 'dirty_inode' super_operation takes flag],
 dirty_inode_super_operation_flag, [
        #include <linux/fs.h>
 ],[
-       struct inode *inode;
+       struct inode *inode = NULL;
        inode->i_sb->s_op->dirty_inode(NULL, 0);
 ],[
        AC_DEFINE(HAVE_DIRTY_INODE_HAS_FLAG, 1,
@@ -783,6 +816,18 @@ dirty_inode_super_operation_flag, [
 ]) # LC_DIRTY_INODE_WITH_FLAG
 
 #
+# LC_SETNS
+#
+# 3.0 introduced setns
+#
+AC_DEFUN([LC_SETNS], [
+AC_CHECK_HEADERS([sched.h], [], [],
+                [#define _GNU_SOURCE
+                ])
+AC_CHECK_FUNCS([setns])
+]) # LC_SETNS
+
+#
 # LC_GENERIC_PERMISSION
 #
 # 2.6.38 generic_permission taken 4 parameters.
@@ -898,26 +943,6 @@ radix_tree_exceptional_entry, [
 ]) # LC_RADIX_EXCEPTION_ENTRY
 
 #
-# LC_HAVE_VOID_MAKE_REQUEST_FN
-#
-# 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>
-],[
-       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
-
-#
 # LC_HAVE_PROTECT_I_NLINK
 #
 # 3.2 protects inode->i_nlink from direct modification
@@ -965,6 +990,23 @@ security_inode_init_security_callback, [
 ]) # LC_HAVE_SECURITY_IINITSEC
 
 #
+# 2.6.39 vfs_create takes a 'struct nameidata' parameter
+#
+AC_DEFUN([LC_VFS_CREATE_USE_NAMEIDATA], [
+LB_CHECK_COMPILE([if vfs_create takes a struct nameidata parameter],
+vfs_create, [
+       #include <linux/namei.h>
+       #include <linux/fs.h>
+],[
+       struct nameidata *nd;
+       vfs_create(NULL, NULL, 0, nd);
+],[
+       AC_DEFINE(HAVE_VFS_CREATE_USE_NAMEIDATA, 1,
+               [vfs_create use nameidata as parameter])
+])
+]) # LC_VFS_CREATE_USE_NAMEIDATA
+
+#
 # LC_HAVE_MIGRATE_HEADER
 #
 # 3.3 introduces migrate_mode.h and migratepage has 4 args
@@ -994,7 +1036,7 @@ address_space_ops_migratepage_4args, [
        #include <linux/migrate_mode.h>
 #endif
 ],[
-       struct address_space_operations aops;
+       struct address_space_operations aops = { };
        aops.migratepage(NULL, NULL, NULL, MIGRATE_ASYNC);
 ],[
        AC_DEFINE(HAVE_MIGRATEPAGE_4ARGS, 1,
@@ -1367,9 +1409,10 @@ LB_CHECK_COMPILE([if 'bio_end_sector' is defined],
 bio_end_sector, [
        #include <linux/bio.h>
 ],[
-       struct bio bio;
+       struct bio bio = { };
+       unsigned long long end;
 
-       bio_end_sector(&bio);
+       end = bio_end_sector(&bio);
 ],[
        AC_DEFINE(HAVE_BIO_END_SECTOR, 1,
                  [bio_end_sector is defined])
@@ -1377,6 +1420,39 @@ bio_end_sector, [
 ]) # LC_HAVE_BIO_END_SECTOR
 
 #
+# 3.9 created is_sxid
+#
+AC_DEFUN([LC_HAVE_IS_SXID], [
+LB_CHECK_COMPILE([if 'is_sxid' is defined],
+is_sxid, [
+       #include <linux/fs.h>
+],[
+       struct inode inode = { };
+
+       is_sxid(inode.i_mode);
+],[
+       AC_DEFINE(HAVE_IS_SXID, 1, [is_sxid is defined])
+])
+]) # LC_HAVE_IS_SXID
+
+#
+# LC_HAVE_VFS_GETATTR_2ARGS
+#
+AC_DEFUN([LC_HAVE_VFS_GETATTR_2ARGS], [
+LB_CHECK_COMPILE([if vfs_getattr takes 2 args],
+vfs_getattr, [
+       #include <linux/fs.h>
+],[
+       struct path path;
+
+       vfs_getattr(&path, NULL);
+],[
+       AC_DEFINE(HAVE_VFS_GETATTR_2ARGS, 1,
+               [vfs_getattr takes 2 args])
+])
+]) # LC_HAVE_VFS_GETATTR_2ARGS
+
+#
 # LC_HAVE_REMOVE_PROC_SUBTREE
 #
 # 3.10 introduced remove_proc_subtree
@@ -1410,25 +1486,53 @@ proc_remove, [
 ])
 ]) # LC_HAVE_PROC_REMOVE
 
+AC_DEFUN([LC_HAVE_PROJECT_QUOTA], [
+LB_CHECK_COMPILE([if get_projid exists],
+get_projid, [
+       struct inode;
+       #include <linux/quota.h>
+],[
+       struct dquot_operations ops = { };
+
+       ops.get_projid(NULL, NULL);
+],[
+       AC_DEFINE(HAVE_PROJECT_QUOTA, 1,
+               [get_projid function exists])
+])
+]) # LC_HAVE_PROJECT_QUOTA
+
+
 #
-# LC_BLKDEV_RELEASE_RETURN_INT
+# LC_HAVE_SECURITY_DENTRY_INIT_SECURITY
 #
-# 3.10 release for block device doesn't return int
+# 3.10 introduced security_dentry_init_security()
 #
-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>
+AC_DEFUN([LC_HAVE_SECURITY_DENTRY_INIT_SECURITY], [
+LB_CHECK_COMPILE([if 'security_dentry_init_security' is defined],
+security_dentry_init_security, [
+       #include <linux/security.h>
+],[
+       security_dentry_init_security(NULL, 0, NULL, NULL, NULL);
 ],[
-       struct block_device_operations fops;
-       int i __attribute__ ((unused));
+       AC_DEFINE(HAVE_SECURITY_DENTRY_INIT_SECURITY, 1,
+               [security_dentry_init_security' is defined])
+])
+]) # LC_HAVE_SECURITY_DENTRY_INIT_SECURITY
 
-       i = fops.release(NULL, 0);
+#
+# 3.10 exports security_inode_listsecurity
+#
+AC_DEFUN([LC_HAVE_SECURITY_INODE_LISTSECURITY], [
+LB_CHECK_COMPILE([if security_inode_listsecurity() is available/exported],
+security_inode_listsecurity, [
+       #include <linux/security.h>
 ],[
-       AC_DEFINE(HAVE_BLKDEV_RELEASE_RETURN_INT, 1,
-               [block device release returns int])
+       security_inode_listsecurity(NULL, NULL, 0);
+],[
+       AC_DEFINE(HAVE_SECURITY_INODE_LISTSECURITY, 1,
+                 [security_inode_listsecurity() is available/exported])
 ])
-]) # LC_BLKDEV_RELEASE_RETURN_INT
+]) # LC_HAVE_SECURITY_INODE_LISTSECURITY
 
 #
 # LC_INVALIDATE_RANGE
@@ -1458,8 +1562,13 @@ LB_CHECK_COMPILE([if 'dir_context' exist],
 dir_context, [
        #include <linux/fs.h>
 ],[
+#ifdef FMODE_KABI_ITERATE
+#error "back to use readdir in kabi_extand mode"
+#else
        struct dir_context ctx;
+
        ctx.pos = 0;
+#endif
 ],[
        AC_DEFINE(HAVE_DIR_CONTEXT, 1,
                [dir_context exist])
@@ -1489,12 +1598,14 @@ d_compare_5args, [
 # 3.11 need to access d_count to get dentry reference count
 #
 AC_DEFUN([LC_HAVE_DCOUNT], [
-LB_CHECK_COMPILE([if 'd_count' exist],
+LB_CHECK_COMPILE([if 'd_count' exists],
 d_count, [
        #include <linux/dcache.h>
 ],[
-       struct dentry de;
-       d_count(&de);
+       struct dentry de = { };
+       int count;
+
+       count = d_count(&de);
 ],[
        AC_DEFINE(HAVE_D_COUNT, 1,
                [d_count exist])
@@ -1502,6 +1613,24 @@ d_count, [
 ]) # LC_HAVE_DCOUNT
 
 #
+# LC_PID_NS_FOR_CHILDREN
+#
+# 3.11 replaces pid_ns by pid_ns_for_children in struct nsproxy
+#
+AC_DEFUN([LC_PID_NS_FOR_CHILDREN], [
+LB_CHECK_COMPILE([if 'struct nsproxy' has 'pid_ns_for_children'],
+pid_ns_for_children, [
+       #include <linux/nsproxy.h>
+],[
+       struct nsproxy ns;
+       ns.pid_ns_for_children = NULL;
+],[
+       AC_DEFINE(HAVE_PID_NS_FOR_CHILDREN, 1,
+                 ['struct nsproxy' has 'pid_ns_for_children'])
+])
+]) # LC_PID_NS_FOR_CHILDREN
+
+#
 # LC_OLDSIZE_TRUNCATE_PAGECACHE
 #
 # 3.12 truncate_pagecache without oldsize parameter
@@ -1519,6 +1648,24 @@ truncate_pagecache_old_size, [
 ]) # LC_OLDSIZE_TRUNCATE_PAGECACHE
 
 #
+# LC_PTR_ERR_OR_ZERO
+#
+# For some reason SLES11SP4 is missing the PTR_ERR_OR_ZERO macro
+# It was added to linux kernel 3.12
+#
+AC_DEFUN([LC_PTR_ERR_OR_ZERO_MISSING], [
+LB_CHECK_COMPILE([if 'PTR_ERR_OR_ZERO' is missing],
+is_err_or_null, [
+       #include <linux/err.h>
+],[
+       if (PTR_ERR_OR_ZERO(NULL)) return 0;
+],[
+       AC_DEFINE(HAVE_PTR_ERR_OR_ZERO, 1,
+               ['PTR_ERR_OR_ZERO' exist])
+])
+]) # LC_PTR_ERR_OR_ZERO_MISSING
+
+#
 # LC_HAVE_DENTRY_D_U_D_ALIAS
 #
 # 3.11 kernel moved d_alias to the union d_u in struct dentry
@@ -1591,6 +1738,27 @@ kiocb_ki_left, [
 ]) # LC_KIOCB_KI_LEFT
 
 #
+# LC_INIT_LIST_HEAD_RCU
+#
+# 3.12 added INIT_LIST_HEAD_RCU in commit 2a855b644c310d5db5
+# which is unfortunately an inline function and not a macro
+# that can be tested directly, so it needs a configure check.
+#
+AC_DEFUN([LC_INIT_LIST_HEAD_RCU], [
+LB_CHECK_COMPILE([if 'INIT_LIST_HEAD_RCU' exists],
+init_list_head_rcu, [
+       #include <linux/list.h>
+       #include <linux/rculist.h>
+],[
+       struct list_head list;
+       INIT_LIST_HEAD_RCU(&list);
+],[
+       AC_DEFINE(HAVE_INIT_LIST_HEAD_RCU, 1,
+                 [INIT_LIST_HEAD_RCU exists])
+])
+]) # LC_INIT_LIST_HEAD_RCU
+
+#
 # LC_VFS_RENAME_5ARGS
 #
 # 3.13 has vfs_rename with 5 args
@@ -1624,6 +1792,23 @@ vfs_unlink_3args, [
 ])
 ]) # LC_VFS_UNLINK_3ARGS
 
+# LC_HAVE_D_IS_POSITIVE
+#
+# Kernel version 3.13 b18825a7c8e37a7cf6abb97a12a6ad71af160de7
+# d_is_positive is added
+#
+AC_DEFUN([LC_HAVE_D_IS_POSITIVE], [
+LB_CHECK_COMPILE([if 'd_is_positive' exist],
+d_is_positive, [
+       #include <linux/dcache.h>
+],[
+       d_is_positive(NULL);
+],[
+       AC_DEFINE(HAVE_D_IS_POSITIVE, 1,
+               ['d_is_positive' is available])
+])
+]) # LC_HAVE_D_IS_POSITIVE
+
 #
 # LC_HAVE_BVEC_ITER
 #
@@ -1636,6 +1821,7 @@ have_bvec_iter, [
        #include <linux/bio.h>
 ],[
        struct bvec_iter iter;
+
        iter.bi_bvec_done = 0;
 ], [
        AC_DEFINE(HAVE_BVEC_ITER, 1,
@@ -1644,6 +1830,25 @@ have_bvec_iter, [
 ]) # LC_HAVE_BVEC_ITER
 
 #
+# LC_IOP_SET_ACL
+#
+# 3.14 adds set_acl method to inode_operations
+# see kernel commit 893d46e443346370cd4ea81d9d35f72952c62a37
+#
+AC_DEFUN([LC_IOP_SET_ACL], [
+LB_CHECK_COMPILE([if 'inode_operations' has '.set_acl' member function],
+inode_ops_set_acl, [
+       #include <linux/fs.h>
+],[
+       struct inode_operations iop;
+       iop.set_acl = NULL;
+],[
+       AC_DEFINE(HAVE_IOP_SET_ACL, 1,
+               [inode_operations has .set_acl member function])
+])
+]) # LC_IOP_SET_ACL
+
+#
 # LC_HAVE_TRUNCATE_IPAGE_FINAL
 #
 # 3.14 bring truncate_inode_pages_final for evict_inode
@@ -1661,6 +1866,27 @@ truncate_ipages_final, [
 ]) # LC_HAVE_TRUNCATE_IPAGES_FINAL
 
 #
+# LC_IOPS_RENAME_WITH_FLAGS
+#
+# 3.14 has inode_operations->rename with 5 args
+# commit 520c8b16505236fc82daa352e6c5e73cd9870cff
+#
+AC_DEFUN([LC_IOPS_RENAME_WITH_FLAGS], [
+LB_CHECK_COMPILE([if 'inode_operations->rename' taken flags as argument],
+iops_rename_with_flags, [
+       #include <linux/fs.h>
+],[
+       struct inode *i1 = NULL, *i2 = NULL;
+       struct dentry *d1 = NULL, *d2 = NULL;
+       int rc;
+       rc = ((struct inode_operations *)0)->rename(i1, d1, i2, d2, 0);
+], [
+       AC_DEFINE(HAVE_IOPS_RENAME_WITH_FLAGS, 1,
+               [inode_operations->rename need flags as argument])
+])
+]) # LC_IOPS_RENAME_WITH_FLAGS
+
+#
 # LC_VFS_RENAME_6ARGS
 #
 # 3.15 has vfs_rename with 6 args
@@ -1687,7 +1913,7 @@ LB_CHECK_COMPILE([if direct IO uses iov_iter],
 direct_io_iter, [
        #include <linux/fs.h>
 ],[
-       struct address_space_operations ops;
+       struct address_space_operations ops = { };
        struct iov_iter *iter = NULL;
        loff_t offset = 0;
 
@@ -1766,6 +1992,23 @@ file_function_iter, [
 ]) # LC_HAVE_FILE_OPERATIONS_READ_WRITE_ITER
 
 #
+# LC_HAVE_INTERVAL_BLK_INTEGRITY
+#
+# 3.17 replace sector_size with interval in struct blk_integrity
+#
+AC_DEFUN([LC_HAVE_INTERVAL_BLK_INTEGRITY], [
+LB_CHECK_COMPILE([if 'blk_integrity.interval' exist],
+interval_blk_integrity, [
+       #include <linux/blkdev.h>
+],[
+       ((struct blk_integrity *)0)->interval = 0;
+],[
+       AC_DEFINE(HAVE_INTERVAL_BLK_INTEGRITY, 1,
+               [blk_integrity.interval exist])
+])
+]) # LC_HAVE_INTERVAL_BLK_INTEGRITY
+
+#
 # LC_KEY_MATCH_DATA
 #
 # 3.17 replaces key_type::match with match_preparse
@@ -1777,6 +2020,8 @@ key_match, [
        #include <linux/key-type.h>
 ],[
        struct key_match_data data;
+
+       data.raw_data = NULL;
 ],[
        AC_DEFINE(HAVE_KEY_MATCH_DATA, 1,
                [struct key_match_data exist])
@@ -1842,7 +2087,7 @@ LB_CHECK_COMPILE([if struct kiocb has ki_nbytes field],
 ki_nbytes, [
        #include <linux/fs.h>
 ],[
-       struct kiocb iocb;
+       struct kiocb iocb = { };
 
        iocb.ki_nbytes = 0;
 ],[
@@ -1851,6 +2096,30 @@ ki_nbytes, [
 ]) # LC_KIOCB_HAS_NBYTES
 
 #
+# LC_HAVE_DQUOT_QC_DQBLK
+#
+# 3.19 has quotactl_ops->[sg]et_dqblk that take struct kqid and qc_dqblk
+# Added in commit 14bf61ffe
+#
+AC_DEFUN([LC_HAVE_DQUOT_QC_DQBLK], [
+tmp_flags="$EXTRA_KCFLAGS"
+EXTRA_KCFLAGS="-Werror"
+LB_CHECK_COMPILE([if 'quotactl_ops.set_dqblk' takes struct qc_dqblk],
+qc_dqblk, [
+       #include <linux/fs.h>
+       #include <linux/quota.h>
+],[
+       ((struct quotactl_ops *)0)->set_dqblk(NULL, *((struct kqid*)0), (struct qc_dqblk*)0);
+],[
+       AC_DEFINE(HAVE_DQUOT_QC_DQBLK, 1,
+               [quotactl_ops.set_dqblk takes struct qc_dqblk])
+       AC_DEFINE(HAVE_DQUOT_KQID, 1,
+               [quotactl_ops.set_dqblk takes struct kqid])
+])
+EXTRA_KCFLAGS="$tmp_flags"
+]) # LC_HAVE_DQUOT_QC_DQBLK
+
+#
 # LC_BACKING_DEV_INFO_REMOVAL
 #
 # 3.20 kernel removed backing_dev_info from address_space
@@ -1938,6 +2207,27 @@ LB_CHECK_EXPORT([new_sync_read], [fs/read_write.c],
 ]) # LC_HAVE_SYNC_READ_WRITE
 
 #
+# LC_HAVE___BI_CNT
+#
+# 4.1 redefined bi_cnt as __bi_cnt in commit dac56212e8127dbc0
+#
+AC_DEFUN([LC_HAVE___BI_CNT], [
+LB_CHECK_COMPILE([if Linux kernel has __bi_cnt in struct bio],
+have___bi_cnt, [
+       #include <asm/atomic.h>
+       #include <linux/bio.h>
+       #include <linux/blk_types.h>
+],[
+       struct bio bio = { };
+       int cnt;
+       cnt = atomic_read(&bio.__bi_cnt);
+], [
+       AC_DEFINE(HAVE___BI_CNT, 1,
+               [struct bio has __bi_cnt])
+])
+]) # LC_HAVE___BI_CNT
+
+#
 # LC_NEW_CANCEL_DIRTY_PAGE
 #
 # 4.2 kernel has new cancel_dirty_page
@@ -1994,6 +2284,25 @@ bio_endio, [
 ]) # LC_BIO_ENDIO_USES_ONE_ARG
 
 #
+# LC_HAVE_INTERVAL_EXP_BLK_INTEGRITY
+#
+# 4.3 replace interval with interval_exp in 'struct blk_integrity'
+# 'struct blk_integrity_profile' is also added in this version,
+# thus use this to determine whether 'struct blk_integrity' has profile
+#
+AC_DEFUN([LC_HAVE_INTERVAL_EXP_BLK_INTEGRITY], [
+LB_CHECK_COMPILE([if 'blk_integrity.interval_exp' exist],
+blk_integrity_interval_exp, [
+       #include <linux/blkdev.h>
+],[
+       ((struct blk_integrity *)0)->interval_exp = 0;
+],[
+       AC_DEFINE(HAVE_INTERVAL_EXP_BLK_INTEGRITY, 1,
+               [blk_integrity.interval_exp exist])
+])
+]) # LC_HAVE_INTERVAL_EXP_BLK_INTEGRITY
+
+#
 # LC_HAVE_LOOP_CTL_GET_FREE
 #
 # 4.x kernel have moved userspace APIs to
@@ -2037,75 +2346,868 @@ cache_head_has_hlist, [
 ]) # LC_HAVE_CACHE_HEAD_HLIST
 
 #
-# LC_HAVE_LOCKS_LOCK_FILE_WAIT
+# LC_HAVE_XATTR_HANDLER_SIMPLIFIED
 #
-# 4.4 kernel have moved locks API users to
-# locks_lock_inode_wait()
+# Kernel version 4.3 commit e409de992e3ea3674393465f07cc71c948edd87a
+# simplified xattr_handler handling by passing in the handler pointer
 #
-AC_DEFUN([LC_HAVE_LOCKS_LOCK_FILE_WAIT], [
-LB_CHECK_COMPILE([if 'locks_lock_file_wait' exists],
-locks_lock_file_wait, [
-       #include <linux/fs.h>
+AC_DEFUN([LC_HAVE_XATTR_HANDLER_SIMPLIFIED], [
+tmp_flags="$EXTRA_KCFLAGS"
+EXTRA_KCFLAGS="-Werror"
+LB_CHECK_COMPILE([if 'struct xattr_handler' functions pass in handler pointer],
+xattr_handler_simplified, [
+       #include <linux/xattr.h>
 ],[
-       locks_lock_file_wait(NULL, NULL);
+       struct xattr_handler handler;
+
+       ((struct xattr_handler *)0)->get(&handler, NULL, NULL, NULL, 0);
+       ((struct xattr_handler *)0)->set(&handler, NULL, NULL, NULL, 0, 0);
 ],[
-       AC_DEFINE(HAVE_LOCKS_LOCK_FILE_WAIT, 1,
-               [kernel has locks_lock_file_wait])
+       AC_DEFINE(HAVE_XATTR_HANDLER_SIMPLIFIED, 1, [handler pointer is parameter])
 ])
-]) # LC_HAVE_LOCKS_LOCK_FILE_WAIT
+EXTRA_KCFLAGS="$tmp_flags"
+]) # LC_HAVE_XATTR_HANDLER_SIMPLIFIED
 
 #
-# LC_HAVE_QC_MAKE_REQUEST_FN
+# LC_HAVE_BIP_ITER_BIO_INTEGRITY_PAYLOAD
 #
-# 4.4 request_queue.make_request_fn defined as function returns with blk_qc_t
-# see kernel commit dece16353ef47d8d33f5302bc158072a9d65e26f
+# 4.3 replace interval with interval_exp in 'struct blk_integrity'.
 #
-AC_DEFUN([LC_HAVE_QC_MAKE_REQUEST_FN], [
-LB_CHECK_COMPILE([if 'request_queue.make_request_fn' returns blk_qc_t],
-make_request_fn_blk_qc_t, [
-       #include <linux/blkdev.h>
+AC_DEFUN([LC_HAVE_BIP_ITER_BIO_INTEGRITY_PAYLOAD], [
+LB_CHECK_COMPILE([if 'bio_integrity_payload.bip_iter' exist],
+bio_integrity_payload_bip_iter, [
+       #include <linux/bio.h>
 ],[
-       blk_qc_t ret;
-       make_request_fn *mrf;
-       ret = mrf(NULL, NULL);
+       ((struct bio_integrity_payload *)0)->bip_iter.bi_size = 0;
 ],[
-       AC_DEFINE(HAVE_QC_MAKE_REQUEST_FN, 1,
-               [request_queue.make_request_fn returns blk_qc_t])
+       AC_DEFINE(HAVE_BIP_ITER_BIO_INTEGRITY_PAYLOAD, 1,
+               [bio_integrity_payload.bip_iter exist])
 ])
-]) # LC_HAVE_QC_MAKE_REQUEST_FN
+]) # LC_HAVE_BIP_ITER_BIO_INTEGRITY_PAYLOAD
 
 #
-# LC_HAVE_KEY_PAYLOAD_DATA_ARRAY
+# LC_BIO_INTEGRITY_PREP_FN
 #
-# 4.4 kernel merged type-specific data with the payload data for keys
+# Lustre kernel patch extents bio_integrity_prep to accept optional
+# generate/verify_fn as extra args.
 #
-AC_DEFUN([LC_HAVE_KEY_PAYLOAD_DATA_ARRAY], [
-LB_CHECK_COMPILE([if 'struct key' has 'payload.data' as an array],
-key_payload_data_array, [
-       #include <linux/key.h>
+AC_DEFUN([LC_BIO_INTEGRITY_PREP_FN], [
+LB_CHECK_COMPILE([if 'bio_integrity_prep_fn' exists],
+bio_integrity_prep_fn, [
+       #include <linux/bio.h>
 ],[
-       ((struct key *)0)->payload.data[0] = NULL;
+       bio_integrity_prep_fn(NULL, NULL, NULL);
 ],[
-       AC_DEFINE(HAVE_KEY_PAYLOAD_DATA_ARRAY, 1, [payload.data is an array])
+       AC_DEFINE(HAVE_BIO_INTEGRITY_PREP_FN, 1,
+               [kernel has bio_integrity_prep_fn])
+       AC_SUBST(PATCHED_INTEGRITY_INTF)
+],[
+       AC_SUBST(PATCHED_INTEGRITY_INTF, [#])
 ])
-]) #LC_HAVE_KEY_PAYLOAD_DATA_ARRAY
+]) # LC_BIO_INTEGRITY_PREP_FN
 
 #
-# LC_HAVE_FILE_DENTRY
+# LC_HAVE_BI_OPF
 #
-# 4.5 adds wrapper file_dentry
+# 4.4/4.8 redefined bi_rw as bi_opf (SLES12/kernel commit 4382e33ad37486)
 #
-AC_DEFUN([LC_HAVE_FILE_DENTRY], [
-LB_CHECK_COMPILE([if Linux kernel has 'file_dentry'],
-file_dentry, [
-       #include <linux/fs.h>
+AC_DEFUN([LC_HAVE_BI_OPF], [
+LB_CHECK_COMPILE([if Linux kernel has bi_opf in struct bio],
+have_bi_opf, [
+       #include <linux/bio.h>
 ],[
-       file_dentry(NULL);
+       struct bio bio;
+
+       bio.bi_opf = 0;
 ], [
-       AC_DEFINE(HAVE_FILE_DENTRY, 1,
-               [kernel has file_dentry])
+       AC_DEFINE(HAVE_BI_OPF, 1,
+               [struct bio has bi_opf])
 ])
-]) # LC_HAVE_FILE_DENTRY
+]) # LC_HAVE_BI_OPF
+
+#
+# LC_HAVE_SUBMIT_BIO_2ARGS
+#
+# 4.4 removed an argument from submit_bio
+#
+AC_DEFUN([LC_HAVE_SUBMIT_BIO_2ARGS], [
+LB_CHECK_COMPILE([if submit_bio takes two arguments],
+have_submit_bio_2args, [
+       #include <linux/bio.h>
+],[
+       struct bio bio;
+       submit_bio(READ, &bio);
+], [
+       AC_DEFINE(HAVE_SUBMIT_BIO_2ARGS, 1,
+               [submit_bio takes two arguments])
+])
+]) # LC_HAVE_SUBMIT_BIO_2_ARGS
+
+#
+# LC_HAVE_CLEAN_BDEV_ALIASES
+#
+# 4.4/4.9 unmap_underlying_metadata was replaced by clean_bdev_aliases
+# (SLES12/kernel commit 29f3ad7d8380364c)
+#
+AC_DEFUN([LC_HAVE_CLEAN_BDEV_ALIASES], [
+LB_CHECK_COMPILE([if kernel has clean_bdev_aliases],
+have_clean_bdev_aliases, [
+       #include <linux/buffer_head.h>
+],[
+       struct block_device bdev;
+       clean_bdev_aliases(&bdev,1,1);
+], [
+       AC_DEFINE(HAVE_CLEAN_BDEV_ALIASES, 1,
+               [kernel has clean_bdev_aliases])
+])
+]) # LC_HAVE_CLEAN_BDEV_ALIASES
+
+#
+# LC_HAVE_LOCKS_LOCK_FILE_WAIT
+#
+# 4.4 kernel have moved locks API users to
+# locks_lock_inode_wait()
+#
+AC_DEFUN([LC_HAVE_LOCKS_LOCK_FILE_WAIT], [
+LB_CHECK_COMPILE([if 'locks_lock_file_wait' exists],
+locks_lock_file_wait, [
+       #include <linux/fs.h>
+],[
+       locks_lock_file_wait(NULL, NULL);
+],[
+       AC_DEFINE(HAVE_LOCKS_LOCK_FILE_WAIT, 1,
+               [kernel has locks_lock_file_wait])
+])
+]) # LC_HAVE_LOCKS_LOCK_FILE_WAIT
+
+#
+# LC_HAVE_KEY_PAYLOAD_DATA_ARRAY
+#
+# 4.4 kernel merged type-specific data with the payload data for keys
+#
+AC_DEFUN([LC_HAVE_KEY_PAYLOAD_DATA_ARRAY], [
+LB_CHECK_COMPILE([if 'struct key' has 'payload.data' as an array],
+key_payload_data_array, [
+       #include <linux/key.h>
+],[
+       struct key key = { };
+
+       key.payload.data[0] = NULL;
+],[
+       AC_DEFINE(HAVE_KEY_PAYLOAD_DATA_ARRAY, 1, [payload.data is an array])
+])
+]) #LC_HAVE_KEY_PAYLOAD_DATA_ARRAY
+
+#
+# LC_HAVE_XATTR_HANDLER_NAME
+#
+# Kernel version 4.4 commit 98e9cb5711c68223f0e4d5201b9a6add255ec550
+# add a name member to struct xattr_handler
+#
+AC_DEFUN([LC_HAVE_XATTR_HANDLER_NAME], [
+tmp_flags="$EXTRA_KCFLAGS"
+EXTRA_KCFLAGS="-Werror"
+LB_CHECK_COMPILE([if 'struct xattr_handler' has a name member],
+xattr_handler_name, [
+       #include <linux/xattr.h>
+],[
+       ((struct xattr_handler *)NULL)->name = NULL;
+],[
+       AC_DEFINE(HAVE_XATTR_HANDLER_NAME, 1, [xattr_handler has a name member])
+])
+EXTRA_KCFLAGS="$tmp_flags"
+]) # LC_HAVE_XATTR_HANDLER_NAME
+
+#
+# LC_HAVE_FILE_DENTRY
+#
+# 4.5 adds wrapper file_dentry
+#
+AC_DEFUN([LC_HAVE_FILE_DENTRY], [
+LB_CHECK_COMPILE([if Linux kernel has 'file_dentry'],
+file_dentry, [
+       #include <linux/fs.h>
+],[
+       file_dentry(NULL);
+], [
+       AC_DEFINE(HAVE_FILE_DENTRY, 1,
+               [kernel has file_dentry])
+])
+]) # LC_HAVE_FILE_DENTRY
+
+#
+# LC_HAVE_INODE_LOCK
+#
+# 4.5 introduced inode_lock
+#
+AC_DEFUN([LC_HAVE_INODE_LOCK], [
+LB_CHECK_COMPILE([if 'inode_lock' is defined],
+inode_lock, [
+       #include <linux/fs.h>
+],[
+       inode_lock(NULL);
+], [
+       AC_DEFINE(HAVE_INODE_LOCK, 1,
+                 [inode_lock is defined])
+])
+]) # LC_HAVE_INODE_LOCK
+
+#
+# LC_HAVE_IOP_GET_LINK
+#
+# 4.5 vfs replaced iop->follow_link with
+# iop->get_link
+#
+AC_DEFUN([LC_HAVE_IOP_GET_LINK], [
+LB_CHECK_COMPILE([if 'iop' has 'get_link'],
+inode_ops_get_link, [
+       #include <linux/fs.h>
+],[
+       struct inode_operations iop;
+       iop.get_link = NULL;
+],[
+       AC_DEFINE(HAVE_IOP_GET_LINK, 1,
+               [have iop get_link])
+])
+]) # LC_HAVE_IOP_GET_LINK
+
+#
+# LC_HAVE_IN_COMPAT_SYSCALL
+#
+# 4.6 renamed is_compat_task to in_compat_syscall
+#
+AC_DEFUN([LC_HAVE_IN_COMPAT_SYSCALL], [
+LB_CHECK_COMPILE([if 'in_compat_syscall' is defined],
+in_compat_syscall, [
+       #include <linux/compat.h>
+],[
+       in_compat_syscall();
+],[
+       AC_DEFINE(HAVE_IN_COMPAT_SYSCALL, 1,
+               [have in_compat_syscall])
+])
+]) # LC_HAVE_IN_COMPAT_SYSCALL
+
+#
+# LC_HAVE_XATTR_HANDLER_INODE_PARAM
+#
+# Kernel version 4.6 commit b296821a7c42fa58baa17513b2b7b30ae66f3336
+# and commit 5930122683dff58f0846b0f0405b4bd598a3ba6a added inode parameter
+# to xattr_handler functions
+#
+AC_DEFUN([LC_HAVE_XATTR_HANDLER_INODE_PARAM], [
+tmp_flags="$EXTRA_KCFLAGS"
+EXTRA_KCFLAGS="-Werror"
+LB_CHECK_COMPILE([if 'struct xattr_handler' functions have inode parameter],
+xattr_handler_inode_param, [
+       #include <linux/xattr.h>
+],[
+       const struct xattr_handler handler;
+
+       ((struct xattr_handler *)0)->get(&handler, NULL, NULL, NULL, NULL, 0);
+       ((struct xattr_handler *)0)->set(&handler, NULL, NULL, NULL, NULL, 0, 0);
+],[
+       AC_DEFINE(HAVE_XATTR_HANDLER_INODE_PARAM, 1, [needs inode parameter])
+])
+EXTRA_KCFLAGS="$tmp_flags"
+]) # LC_HAVE_XATTR_HANDLER_INODE_PARAM
+
+#
+# LC_D_IN_LOOKUP
+#
+# Kernel version 4.6 commit 85c7f81041d57cfe9dc97f4680d5586b54534a39
+# introduced parallel lookups in the VFS layer. The inline function
+# d_in_lookup was added to notify when the same item was being queried
+# at the same time.
+#
+AC_DEFUN([LC_D_IN_LOOKUP], [
+tmp_flags="$EXTRA_KCFLAGS"
+EXTRA_KCFLAGS="-Werror"
+LB_CHECK_COMPILE([if 'd_in_lookup' is defined],
+d_in_lookup, [
+       #include <linux/dcache.h>
+],[
+       d_in_lookup(NULL);
+],[
+       AC_DEFINE(HAVE_D_IN_LOOKUP, 1, [d_in_lookup is defined])
+])
+EXTRA_KCFLAGS="$tmp_flags"
+]) # LC_D_IN_LOOKUP
+
+#
+# LC_DIRECTIO_2ARGS
+#
+# Kernel version 4.7 commit c8b8e32d700fe943a935e435ae251364d016c497
+# direct-io: eliminate the offset argument to ->direct_IO
+#
+AC_DEFUN([LC_DIRECTIO_2ARGS], [
+LB_CHECK_COMPILE([if '->direct_IO()' taken 2 arguments],
+direct_io_2args, [
+       #include <linux/fs.h>
+],[
+       struct address_space_operations ops = { };
+       struct iov_iter *iter = NULL;
+       struct kiocb *iocb = NULL;
+       int rc;
+
+       rc = ops.direct_IO(iocb, iter);
+],[
+       AC_DEFINE(HAVE_DIRECTIO_2ARGS, 1,
+               [direct_IO need 2 arguments])
+])
+]) # LC_DIRECTIO_2ARGS
+
+#
+# LC_GENERIC_WRITE_SYNC_2ARGS
+#
+# Kernel version 4.7 commit dde0c2e79848298cc25621ad080d47f94dbd7cce
+# fs: add IOCB_SYNC and IOCB_DSYNC
+#
+AC_DEFUN([LC_GENERIC_WRITE_SYNC_2ARGS], [
+LB_CHECK_COMPILE([if 'generic_write_sync()' taken 2 arguments],
+generic_write_sync_2args, [
+       #include <linux/fs.h>
+],[
+       struct kiocb *iocb = NULL;
+       ssize_t rc;
+
+       rc = generic_write_sync(iocb, 0);
+],[
+       AC_DEFINE(HAVE_GENERIC_WRITE_SYNC_2ARGS, 1,
+               [generic_write_sync need 2 arguments])
+])
+]) # LC_GENERIC_WRITE_SYNC_2ARGS
+
+#
+# LC_FOP_ITERATE_SHARED
+#
+# Kernel version 4.7 adds iterate_shared method to file_operations
+#
+AC_DEFUN([LC_FOP_ITERATE_SHARED], [
+LB_CHECK_COMPILE([if 'file_operations' has 'iterate_shared'],
+fop_iterate_shared, [
+       #include <linux/fs.h>
+],[
+       struct file_operations fop;
+       fop.iterate_shared = NULL;
+],[
+       AC_DEFINE(HAVE_FOP_ITERATE_SHARED, 1,
+               [file_operations has iterate_shared])
+])
+]) # LC_FOP_ITERATE_SHARED
+
+#
+# LC_FOPS_ITERATE_SHARED
+#
+# 4.7 commit ae05327a00fd47c34dfe25294b359a3f3fef96e8
+# ext4: switch to ->iterate_shared()
+# this replaces ext4_dir_operations iterate with iterate_shared.
+# dir_relaxed_shared() was also added in this commit, so we can
+# use that function to verify that the ext4_dir_operations is using
+# iterate_shared.
+#
+AC_DEFUN([LC_FOPS_ITERATE_SHARED], [
+LB_CHECK_COMPILE([if ext4_dir_operations uses iterate_shared],
+iterate_shared, [
+       #include <linux/fs.h>
+],[
+       ((struct file_operations *)0)->iterate_shared(NULL, NULL);
+       dir_relax_shared(NULL);
+],[
+       AC_DEFINE(HAVE_ITERATE_SHARED, 1,
+               ['iterate_shared' is available])
+])
+]) # LC_FOPS_ITERATE_SHARED
+
+#
+# LC_HAVE_POSIX_ACL_VALID_USER_NS
+#
+# 4.8 posix_acl_valid takes struct user_namespace
+#
+AC_DEFUN([LC_HAVE_POSIX_ACL_VALID_USER_NS], [
+LB_CHECK_COMPILE([if 'posix_acl_valid' takes 'struct user_namespace'],
+posix_acl_valid, [
+       #include <linux/fs.h>
+       #include <linux/posix_acl.h>
+],[
+       posix_acl_valid((struct user_namespace*)NULL, (const struct posix_acl*)NULL);
+],[
+       AC_DEFINE(HAVE_POSIX_ACL_VALID_USER_NS, 1,
+               [posix_acl_valid takes struct user_namespace])
+])
+]) # LC_HAVE_POSIX_ACL_VALID_USER_NS
+
+#
+# LC_D_COMPARE_4ARGS
+#
+# Kernel version 4.8 commit 6fa67e707559303e086303aeecc9e8b91ef497d5
+# get rid of 'parent' argument of ->d_compare()
+#
+AC_DEFUN([LC_D_COMPARE_4ARGS], [
+LB_CHECK_COMPILE([if 'd_compare' taken 4 arguments],
+d_compare_4args, [
+       #include <linux/dcache.h>
+],[
+       ((struct dentry_operations*)0)->d_compare(NULL,0,NULL,NULL);
+],[
+       AC_DEFINE(HAVE_D_COMPARE_4ARGS, 1,
+               [d_compare need 4 arguments])
+])
+]) # LC_D_COMPARE_4ARGS
+
+#
+# LC_FULL_NAME_HASH_3ARGS
+#
+# Kernel version 4.8 commit 8387ff2577eb9ed245df9a39947f66976c6bcd02
+# vfs: make the string hashes salt the hash
+#
+AC_DEFUN([LC_FULL_NAME_HASH_3ARGS], [
+LB_CHECK_COMPILE([if 'full_name_hash' taken 3 arguments],
+full_name_hash_3args, [
+       #include <linux/stringhash.h>
+],[
+       unsigned int hash;
+       hash = full_name_hash(NULL,NULL,0);
+],[
+       AC_DEFINE(HAVE_FULL_NAME_HASH_3ARGS, 1,
+               [full_name_hash need 3 arguments])
+])
+]) # LC_FULL_NAME_HASH_3ARGS
+
+#
+# LC_STRUCT_POSIX_ACL_XATTR
+#
+# Kernel version 4.8 commit 2211d5ba5c6c4e972ba6dbc912b2897425ea6621
+# posix_acl: xattr representation cleanups
+#
+AC_DEFUN([LC_STRUCT_POSIX_ACL_XATTR], [
+LB_CHECK_COMPILE([if 'struct posix_acl_xattr_{header,entry}' defined],
+struct_posix_acl_xattr, [
+       #include <linux/fs.h>
+       #include <linux/posix_acl_xattr.h>
+],[
+       struct posix_acl_xattr_header *h = NULL;
+       struct posix_acl_xattr_entry  *e;
+       e = (void *)(h + 1);
+],[
+       AC_DEFINE(HAVE_STRUCT_POSIX_ACL_XATTR, 1,
+               [struct posix_acl_xattr_{header,entry} defined])
+])
+]) # LC_STRUCT_POSIX_ACL_XATTR
+
+#
+# LC_IOP_XATTR
+#
+# Kernel version 4.8 commit fd50ecaddf8372a1d96e0daeaac0f93cf04e4d42
+# removed {get,set,remove}xattr inode operations
+#
+AC_DEFUN([LC_IOP_XATTR], [
+LB_CHECK_COMPILE([if 'inode_operations' has {get,set,remove}xattr members],
+inode_ops_xattr, [
+       #include <linux/fs.h>
+],[
+       struct inode_operations iop;
+       iop.setxattr = NULL;
+       iop.getxattr = NULL;
+       iop.removexattr = NULL;
+],[
+       AC_DEFINE(HAVE_IOP_XATTR, 1,
+               [inode_operations has {get,set,remove}xattr members])
+])
+]) # LC_IOP_XATTR
+
+#
+# LC_GROUP_INFO_GID
+#
+# Kernel version 4.9 commit 81243eacfa400f5f7b89f4c2323d0de9982bb0fb
+# cred: simpler, 1D supplementary groups
+#
+AC_DEFUN([LC_GROUP_INFO_GID], [
+LB_CHECK_COMPILE([if 'struct group_info' has member 'gid'],
+group_info_gid, [
+       #include <linux/cred.h>
+],[
+       kgid_t *p;
+       p = ((struct group_info *)0)->gid;
+],[
+       AC_DEFINE(HAVE_GROUP_INFO_GID, 1,
+               [struct group_info has member gid])
+])
+]) # LC_GROUP_INFO_GID
+
+#
+# LC_VFS_SETXATTR
+#
+# Kernel version 4.9 commit 5d6c31910bc0713e37628dc0ce677dcb13c8ccf4
+# added __vfs_{get,set,remove}xattr helpers
+#
+AC_DEFUN([LC_VFS_SETXATTR], [
+LB_CHECK_COMPILE([if '__vfs_setxattr' helper is available],
+vfs_setxattr, [
+       #include <linux/xattr.h>
+],[
+       __vfs_setxattr(NULL, NULL, NULL, NULL, 0, 0);
+],[
+       AC_DEFINE(HAVE_VFS_SETXATTR, 1,
+               ['__vfs_setxattr is available])
+])
+]) # LC_VFS_SETXATTR
+
+#
+# LC_POSIX_ACL_UPDATE_MODE
+#
+# Kernel version 4.9 commit 073931017b49d9458aa351605b43a7e34598caef
+# posix_acl: Clear SGID bit when setting file permissions
+#
+AC_DEFUN([LC_POSIX_ACL_UPDATE_MODE], [
+LB_CHECK_COMPILE([if 'posix_acl_update_mode' exists],
+posix_acl_update_mode, [
+       #include <linux/fs.h>
+       #include <linux/posix_acl.h>
+],[
+       posix_acl_update_mode(NULL, NULL, NULL);
+],[
+       AC_DEFINE(HAVE_POSIX_ACL_UPDATE_MODE, 1,
+               ['posix_acl_update_mode' is available])
+])
+]) # LC_POSIX_ACL_UPDATE_MODE
+
+#
+# LC_IOP_GENERIC_READLINK
+#
+# Kernel version 4.10 commit dfeef68862edd7d4bafe68ef7aeb5f658ef24bb5
+# removed generic_readlink from individual file systems
+#
+AC_DEFUN([LC_IOP_GENERIC_READLINK], [
+LB_CHECK_COMPILE([if 'generic_readlink' still exist],
+inode_ops_readlink, [
+       #include <linux/fs.h>
+],[
+       struct inode_operations iop;
+       iop.readlink = generic_readlink;
+],[
+       AC_DEFINE(HAVE_IOP_GENERIC_READLINK, 1,
+               [generic_readlink has been removed])
+])
+]) # LC_IOP_GENERIC_READLINK
+
+#
+# LC_HAVE_VM_FAULT_ADDRESS
+#
+# Kernel version 4.10 commit 1a29d85eb0f19b7d8271923d8917d7b4f5540b3e
+# removed virtual_address field. Need to use address field instead
+#
+AC_DEFUN([LC_HAVE_VM_FAULT_ADDRESS], [
+LB_CHECK_COMPILE([if 'struct vm_fault' replaced virtual_address with address field],
+vm_fault_address, [
+       #include <linux/mm.h>
+],[
+       struct vm_fault vmf;
+       vmf.address = NULL;
+],[
+       AC_DEFINE(HAVE_VM_FAULT_ADDRESS, 1,
+               [virtual_address has been replaced by address field])
+])
+]) # LC_HAVE_VM_FAULT_ADDRESS
+
+#
+# LC_INODEOPS_ENHANCED_GETATTR
+#
+# Kernel version 4.11 commit a528d35e8bfcc521d7cb70aaf03e1bd296c8493f
+# expanded getattr to be able to get more stat information.
+#
+AC_DEFUN([LC_INODEOPS_ENHANCED_GETATTR], [
+LB_CHECK_COMPILE([if 'inode_operations' getattr member can gather advance stats],
+getattr_path, [
+       #include <linux/fs.h>
+],[
+       struct path path;
+
+       ((struct inode_operations *)1)->getattr(&path, NULL, 0, 0);
+],[
+       AC_DEFINE(HAVE_INODEOPS_ENHANCED_GETATTR, 1,
+               [inode_operations .getattr member function can gather advance stats])
+])
+]) # LC_INODEOPS_ENHANCED_GETATTR
+
+#
+# LC_VM_OPERATIONS_REMOVE_VMF_ARG
+#
+# Kernel version 4.11 commit 11bac80004499ea59f361ef2a5516c84b6eab675
+# removed struct vm_area_struct as an argument for vm_operations since
+# in the same kernel version struct vma_area_struct was folded into
+# struct vm_fault.
+#
+AC_DEFUN([LC_VM_OPERATIONS_REMOVE_VMF_ARG], [
+LB_CHECK_COMPILE([if 'struct vm_operations' removed struct vm_area_struct],
+vm_operations_no_vm_area_struct, [
+       #include <linux/mm.h>
+],[
+       struct vm_fault vmf;
+
+       ((struct vm_operations_struct *)0)->fault(&vmf);
+       ((struct vm_operations_struct *)0)->page_mkwrite(&vmf);
+],[
+       AC_DEFINE(HAVE_VM_OPS_USE_VM_FAULT_ONLY, 1,
+               ['struct vm_operations' remove struct vm_area_struct argument])
+])
+]) # LC_VM_OPERATIONS_REMOVE_VMF_ARG
+
+#
+# LC_HAVE_KEY_USAGE_REFCOUNT
+#
+# Kernel version 4.11 commit fff292914d3a2f1efd05ca71c2ba72a3c663201e
+# converted key.usage from atomic_t to refcount_t.
+#
+AC_DEFUN([LC_HAVE_KEY_USAGE_REFCOUNT], [
+LB_CHECK_COMPILE([if 'key.usage' is refcount_t],
+key_usage_refcount, [
+       #include <linux/key.h>
+],[
+       struct key key = { };
+
+       refcount_read(&key.usage);
+],[
+       AC_DEFINE(HAVE_KEY_USAGE_REFCOUNT, 1, [key.usage is of type refcount_t])
+])
+]) #LC_HAVE_KEY_USAGE_REFCOUNT
+
+#
+# LC_HAVE_CRYPTO_MAX_ALG_NAME_128
+#
+# Kernel version 4.11 commit f437a3f477cce402dbec6537b29e9e33962c9f73
+# switched CRYPTO_MAX_ALG_NAME from 64 to 128.
+#
+AC_DEFUN([LC_HAVE_CRYPTO_MAX_ALG_NAME_128], [
+LB_CHECK_COMPILE([if 'CRYPTO_MAX_ALG_NAME' is 128],
+crypto_max_alg_name, [
+       #include <linux/crypto.h>
+],[
+       #if CRYPTO_MAX_ALG_NAME != 128
+       exit(1);
+       #endif
+],[
+       AC_DEFINE(HAVE_CRYPTO_MAX_ALG_NAME_128, 1,
+               ['CRYPTO_MAX_ALG_NAME' is 128])
+])
+]) # LC_HAVE_CRYPTO_MAX_ALG_NAME_128
+
+#
+# Kernel version 4.12 commit 47f38c539e9a42344ff5a664942075bd4df93876
+# CURRENT_TIME is not 64 bit time safe so it was replaced with
+# current_time()
+#
+AC_DEFUN([LC_CURRENT_TIME], [
+LB_CHECK_COMPILE([if CURRENT_TIME has been replaced with current_time],
+current_time, [
+       #include <linux/fs.h>
+],[
+       struct iattr attr;
+
+       attr.ia_atime = current_time(NULL);
+],[
+       AC_DEFINE(HAVE_CURRENT_TIME, 1,
+               [current_time() has replaced CURRENT_TIME])
+])
+]) # LIBCFS_CURRENT_TIME
+
+#
+# Kernel version 4.12-rc3 85787090a21eb749d8b347eaf9ff1a455637473c
+# changed struct super_block s_uuid into a proper uuid_t
+#
+AC_DEFUN([LC_SUPER_BLOCK_S_UUID], [
+LB_CHECK_COMPILE([if 'struct super_block' s_uuid is uuid_t],
+super_block_s_uuid, [
+       #include <linux/fs.h>
+],[
+       struct super_block sb;
+
+       uuid_parse(NULL, &sb.s_uuid);
+],[
+       AC_DEFINE(HAVE_S_UUID_AS_UUID_T, 1, ['s_uuid' is an uuid_t])
+])
+]) # LC_SUPER_BLOCK_S_UUID
+
+#
+# LC_SUPER_SETUP_BDI_NAME
+#
+# Kernel version 4.12 commit 9594caf216dc0fe3e318b34af0127276db661241
+# unified bdi handling
+#
+AC_DEFUN([LC_SUPER_SETUP_BDI_NAME], [
+LB_CHECK_COMPILE([if 'super_setup_bdi_name' exist],
+super_setup_bdi_name, [
+       #include <linux/fs.h>
+],[
+       super_setup_bdi_name(NULL, "lustre");
+],[
+       AC_DEFINE(HAVE_SUPER_SETUP_BDI_NAME, 1,
+               ['super_setup_bdi_name' is available])
+])
+]) # LC_SUPER_SETUP_BDI_NAME
+
+#
+# LC_BI_STATUS
+#
+# 4.12 replace bi_error to bi_status
+#
+AC_DEFUN([LC_BI_STATUS], [
+LB_CHECK_COMPILE([if 'bi_status' exist],
+bi_status, [
+       #include <linux/blk_types.h>
+],[
+       ((struct bio *)0)->bi_status = 0;
+],[
+       AC_DEFINE(HAVE_BI_STATUS, 1,
+               ['bi_status' is available])
+])
+]) # LC_BI_STATUS
+
+#
+# LC_UAPI_LINUX_MOUNT_H
+#
+# kernel 4.20 commit e262e32d6bde0f77fb0c95d977482fc872c51996
+# vfs: Suppress MS_* flag defs within the kernel ...
+#
+AC_DEFUN([LC_UAPI_LINUX_MOUNT_H], [
+tmp_flags="$EXTRA_KCFLAGS"
+EXTRA_KCFLAGS="-Werror"
+LB_CHECK_COMPILE([if MS_RDONLY was moved to uapi/linux/mount.h],
+uapi_linux_mount, [
+       #include <uapi/linux/mount.h>
+],[
+       int x = MS_RDONLY;
+       (void)x;
+],[
+       AC_DEFINE(HAVE_UAPI_LINUX_MOUNT_H, 1,
+               [if MS_RDONLY was moved to uapi/linux/mount.h])
+])
+EXTRA_KCFLAGS="$tmp_flags"
+]) # LC_UAPI_LINUX_MOUNT_H
+
+#
+# LC_BIO_INTEGRITY_ENABLED
+#
+# 4.13 removed bio_integrity_enabled
+#
+AC_DEFUN([LC_BIO_INTEGRITY_ENABLED], [
+LB_CHECK_COMPILE([if 'bio_integrity_enabled' exist],
+bio_integrity_enabled, [
+       #include <linux/bio.h>
+],[
+       bio_integrity_enabled(NULL);
+],[
+       AC_DEFINE(HAVE_BIO_INTEGRITY_ENABLED, 1,
+               ['bio_integrity_enabled' is available])
+])
+]) # LC_BIO_INTEGRITY_ENABLED
+
+#
+# LC_PAGEVEC_INIT_ONE_PARAM
+#
+# 4.14 pagevec_init takes one parameter
+#
+AC_DEFUN([LC_PAGEVEC_INIT_ONE_PARAM], [
+LB_CHECK_COMPILE([if 'pagevec_init' takes one parameter],
+pagevec_init, [
+       #include <linux/pagevec.h>
+],[
+       pagevec_init(NULL);
+],[
+       AC_DEFINE(HAVE_PAGEVEC_INIT_ONE_PARAM, 1,
+               ['pagevec_init' takes one parameter])
+])
+]) # LC_PAGEVEC_INIT_ONE_PARAM
+
+#
+# LC_BI_BDEV
+#
+# 4.14 replaced bi_bdev to bi_disk
+#
+AC_DEFUN([LC_BI_BDEV], [
+LB_CHECK_COMPILE([if 'bi_bdev' exist],
+bi_bdev, [
+       #include <linux/bio.h>
+],[
+       ((struct bio *)0)->bi_bdev = NULL;
+],[
+       AC_DEFINE(HAVE_BI_BDEV, 1,
+               ['bi_bdev' is available])
+])
+]) # LC_BI_BDEV
+
+#
+# LC_I_PAGES
+#
+# kernel 4.17 commit b93b016313b3ba8003c3b8bb71f569af91f19fc7
+#
+AC_DEFUN([LC_I_PAGES], [
+LB_CHECK_COMPILE([if struct address_space has i_pages],
+i_pages, [
+       #include <linux/fs.h>
+],[
+       struct address_space mapping = {};
+       void *i_pages;
+
+       i_pages = &mapping.i_pages;
+],[
+       AC_DEFINE(HAVE_I_PAGES, 1,
+               [struct address_space has i_pages])
+])
+]) # LC_I_PAGES
+
+#
+# LC_VM_FAULT_T
+#
+# kernel 4.17 commit 3d3539018d2cbd12e5af4a132636ee7fd8d43ef0
+# mm: create the new vm_fault_t type
+#
+AC_DEFUN([LC_VM_FAULT_T], [
+LB_CHECK_COMPILE([if vm_fault_t type exists],
+vm_fault_t, [
+       #include <linux/mm_types.h>
+],[
+       vm_fault_t x = VM_FAULT_SIGBUS;
+       (void)x
+],[
+       AC_DEFINE(HAVE_VM_FAULT_T, 1,
+               [if vm_fault_t type exists])
+])
+]) # LC_VM_FAULT_T
+
+#
+# LC_INODE_TIMESPEC64
+#
+# kernel 4.17-rc7 commit 8efd6894ff089adeeac7cb9f32125b85d963d1bc
+# fs: add timespec64_truncate()
+# kernel 4.18 commit 95582b00838837fc07e042979320caf917ce3fe6
+# inode timestamps switched to timespec64
+# kernel 4.19-rc2 commit 976516404ff3fab2a8caa8bd6f5efc1437fed0b8
+# y2038: remove unused time interfaces
+# ...
+#  timespec_trunc
+# ...
+# When inode times are timespec64 stop using the deprecated
+# time interfaces.
+#
+AC_DEFUN([LC_INODE_TIMESPEC64], [
+tmp_flags="$EXTRA_KCFLAGS"
+EXTRA_KCFLAGS="-Werror"
+LB_CHECK_COMPILE([if inode timestamps are struct timespec64],
+inode_timespec64, [
+       #include <linux/fs.h>
+],[
+       struct inode inode = {};
+       struct timespec64 ts = {};
+
+       inode.i_atime = timespec64_trunc(ts, 1);
+       (void)inode;
+],[
+       AC_DEFINE(HAVE_INODE_TIMESPEC64, 1,
+               [inode times are using timespec64])
+])
+EXTRA_KCFLAGS="$tmp_flags"
+]) # LC_INODE_TIMESPEC64
 
 #
 # LC_PROG_LINUX
@@ -2118,24 +3220,27 @@ AC_DEFUN([LC_PROG_LINUX], [
 
        LC_CONFIG_PINGER
        LC_CONFIG_CHECKSUM
+       LC_CONFIG_FLOCK
        LC_CONFIG_HEALTH_CHECK_WRITE
        LC_CONFIG_LRU_RESIZE
-       LC_LLITE_LLOOP_MODULE
 
        LC_GLIBC_SUPPORT_FHANDLES
        LC_CONFIG_GSS
-       LC_HAVE_VOID_OPENSSL_HMAC_FUNCS
+       LC_OPENSSL_SSK
+       LC_OPENSSL_GETSEPOL
 
        # 2.6.32
        LC_BLK_QUEUE_MAX_SEGMENTS
 
+       # 2.6.33
+       LC_HAVE_XATTR_HANDLER_FLAGS
+
        # 2.6.34
        LC_HAVE_DQUOT_FS_DISK_QUOTA
        LC_HAVE_DQUOT_SUSPEND
        LC_HAVE_ADD_WAIT_QUEUE_EXCLUSIVE
 
        # 2.6.35, 3.0.0
-       LC_FILE_FSYNC
        LC_EXPORT_SIMPLE_SETATTR
        LC_EXPORT_TRUNCATE_COMPLETE_PAGE
 
@@ -2145,6 +3250,8 @@ AC_DEFUN([LC_PROG_LINUX], [
 
        # 2.6.37
        LC_KERNEL_LOCKED
+       LC_FS_STRUCT_SEQCOUNT
+       LC_DENTRY_PATH_RAW
 
        # 2.6.38
        LC_BLKDEV_GET_BY_DEV
@@ -2153,17 +3260,18 @@ AC_DEFUN([LC_PROG_LINUX], [
        LC_INODE_I_RCU
        LC_D_COMPARE_7ARGS
        LC_D_DELETE_CONST
+       LC_HAVE_BLK_PLUG
 
        # 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
        LC_HAVE_SECURITY_IINITSEC
+       LC_VFS_CREATE_USE_NAMEIDATA
 
        # 3.0
        LC_DIRTY_INODE_WITH_FLAG
+       LC_SETNS
 
        # 3.1
        LC_LM_XXX_LOCK_MANAGER_OPS
@@ -2175,7 +3283,6 @@ AC_DEFUN([LC_PROG_LINUX], [
        LC_HAVE_LOOP_CTL_GET_FREE
 
        # 3.2
-       LC_HAVE_VOID_MAKE_REQUEST_FN
        LC_HAVE_PROTECT_I_NLINK
 
        # 3.3
@@ -2211,11 +3318,15 @@ AC_DEFUN([LC_PROG_LINUX], [
        # 3.9
        LC_HAVE_HLIST_FOR_EACH_3ARG
        LC_HAVE_BIO_END_SECTOR
+       LC_HAVE_IS_SXID
+       LC_HAVE_VFS_GETATTR_2ARGS
 
        # 3.10
-       LC_BLKDEV_RELEASE_RETURN_INT
        LC_HAVE_REMOVE_PROC_SUBTREE
        LC_HAVE_PROC_REMOVE
+       LC_HAVE_PROJECT_QUOTA
+       LC_HAVE_SECURITY_DENTRY_INIT_SECURITY
+       LC_HAVE_SECURITY_INODE_LISTSECURITY
 
        # 3.11
        LC_INVALIDATE_RANGE
@@ -2224,18 +3335,24 @@ AC_DEFUN([LC_PROG_LINUX], [
        LC_HAVE_DCOUNT
        LC_HAVE_DENTRY_D_U_D_ALIAS
        LC_HAVE_DENTRY_D_CHILD
+       LC_PID_NS_FOR_CHILDREN
 
        # 3.12
        LC_OLDSIZE_TRUNCATE_PAGECACHE
+       LC_PTR_ERR_OR_ZERO_MISSING
        LC_KIOCB_KI_LEFT
+       LC_INIT_LIST_HEAD_RCU
 
        # 3.13
        LC_VFS_RENAME_5ARGS
        LC_VFS_UNLINK_3ARGS
+       LC_HAVE_D_IS_POSITIVE
 
        # 3.14
        LC_HAVE_BVEC_ITER
        LC_HAVE_TRUNCATE_IPAGES_FINAL
+       LC_IOPS_RENAME_WITH_FLAGS
+       LC_IOP_SET_ACL
 
        # 3.15
        LC_VFS_RENAME_6ARGS
@@ -2247,6 +3364,7 @@ AC_DEFUN([LC_PROG_LINUX], [
        LC_HAVE_FILE_OPERATIONS_READ_WRITE_ITER
 
        # 3.17
+       LC_HAVE_INTERVAL_BLK_INTEGRITY
        LC_KEY_MATCH_DATA
 
        # 3.18
@@ -2255,6 +3373,7 @@ AC_DEFUN([LC_PROG_LINUX], [
 
        # 3.19
        LC_KIOCB_HAS_NBYTES
+       LC_HAVE_DQUOT_QC_DQBLK
 
        # 3.20
        LC_BACKING_DEV_INFO_REMOVAL
@@ -2266,6 +3385,7 @@ AC_DEFUN([LC_PROG_LINUX], [
        # 4.1.0
        LC_IOV_ITER_RW
        LC_HAVE_SYNC_READ_WRITE
+       LC_HAVE___BI_CNT
 
        # 4.2
        LC_NEW_CANCEL_DIRTY_PAGE
@@ -2273,19 +3393,86 @@ AC_DEFUN([LC_PROG_LINUX], [
        LC_SYMLINK_OPS_USE_NAMEIDATA
 
        # 4.3
+       LC_HAVE_INTERVAL_EXP_BLK_INTEGRITY
+       LC_HAVE_BIP_ITER_BIO_INTEGRITY_PAYLOAD
        LC_HAVE_CACHE_HEAD_HLIST
+       LC_HAVE_XATTR_HANDLER_SIMPLIFIED
 
        # 4.4
        LC_HAVE_LOCKS_LOCK_FILE_WAIT
-       LC_HAVE_QC_MAKE_REQUEST_FN
        LC_HAVE_KEY_PAYLOAD_DATA_ARRAY
+       LC_HAVE_XATTR_HANDLER_NAME
+       LC_HAVE_BI_OPF
+       LC_HAVE_SUBMIT_BIO_2ARGS
+       LC_HAVE_CLEAN_BDEV_ALIASES
 
        # 4.5
        LC_HAVE_FILE_DENTRY
 
+       # 4.5
+       LC_HAVE_INODE_LOCK
+       LC_HAVE_IOP_GET_LINK
+
+       # 4.6
+       LC_HAVE_IN_COMPAT_SYSCALL
+       LC_HAVE_XATTR_HANDLER_INODE_PARAM
+
+       # 4.7
+       LC_D_IN_LOOKUP
+       LC_DIRECTIO_2ARGS
+       LC_GENERIC_WRITE_SYNC_2ARGS
+       LC_FOPS_ITERATE_SHARED
+
+       # 4.8
+       LC_HAVE_POSIX_ACL_VALID_USER_NS
+       LC_D_COMPARE_4ARGS
+       LC_FULL_NAME_HASH_3ARGS
+       LC_STRUCT_POSIX_ACL_XATTR
+       LC_IOP_XATTR
+
+       # 4.9
+       LC_GROUP_INFO_GID
+       LC_VFS_SETXATTR
+       LC_POSIX_ACL_UPDATE_MODE
+
+       # 4.10
+       LC_IOP_GENERIC_READLINK
+       LC_HAVE_VM_FAULT_ADDRESS
+
+       # 4.11
+       LC_INODEOPS_ENHANCED_GETATTR
+       LC_VM_OPERATIONS_REMOVE_VMF_ARG
+       LC_HAVE_KEY_USAGE_REFCOUNT
+       LC_HAVE_CRYPTO_MAX_ALG_NAME_128
+
+       # 4.12
+       LC_CURRENT_TIME
+       LC_SUPER_BLOCK_S_UUID
+       LC_SUPER_SETUP_BDI_NAME
+       LC_BI_STATUS
+
+       # 4.13
+       LC_BIO_INTEGRITY_ENABLED
+
+       # 4.14
+       LC_PAGEVEC_INIT_ONE_PARAM
+       LC_BI_BDEV
+
+       # 4.17
+       LC_VM_FAULT_T
+       LC_I_PAGES
+
+       # 4.18
+       LC_INODE_TIMESPEC64
+
+       # 5.0
+       LC_UAPI_LINUX_MOUNT_H
+
+       # kernel patch to extend integrity interface
+       LC_BIO_INTEGRITY_PREP_FN
+
        #
        AS_IF([test "x$enable_server" != xno], [
-               LC_FUNC_DEV_SET_RDONLY
                LC_STACK_SIZE
                LC_QUOTA64
                LC_QUOTA_CONFIG
@@ -2317,17 +3504,21 @@ AC_ARG_ENABLE([mpitests],
                case $enableval in
                yes)
                        MPICC_WRAPPER="mpicc"
+                       MPI_BIN=$(eval which $MPICC_WRAPPER | xargs dirname)
                        ;;
                no)
                        enable_mpitests="no"
+                       MPI_BIN=""
                        ;;
                *)
                        MPICC_WRAPPER=$enableval
+                       MPI_BIN=$(eval echo $MPICC_WRAPPER | xargs dirname)
                        ;;
                esac
        ], [
                enable_mpitests="yes"
                MPICC_WRAPPER="mpicc"
+               MPI_BIN=$(eval which $MPICC_WRAPPER | xargs dirname)
        ])
 
        if test "x$enable_mpitests" != "xno"; then
@@ -2346,6 +3537,7 @@ AC_ARG_ENABLE([mpitests],
                enable_mpitests=$lb_cv_mpi_tests
                CC=$oldcc
        fi
+       AC_SUBST(MPI_BIN)
        AC_SUBST(MPICC_WRAPPER)
 ]) # LB_CONFIG_MPITESTS
 
@@ -2381,42 +3573,6 @@ AS_IF([test "x$enable_quota" != xno -a "x$enable_utils" != xno], [
 ]) # LC_QUOTA
 
 #
-# 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], [
-LB_CHECK_COMPILE([whether to enable 'llite_lloop' module],
-enable_llite_lloop_module, [
-       #include <asm/page.h>
-],[
-       #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
@@ -2467,8 +3623,6 @@ AC_DEFUN([LC_CONFIGURE], [
 AC_MSG_NOTICE([Lustre core checks
 ==============================================================================])
 
-LC_CONFIG_OBD_BUFFER_SIZE
-
 AS_IF([test $target_cpu == "i686" -o $target_cpu == "x86_64"],
        [CFLAGS="$CFLAGS -Wall -Werror"])
 
@@ -2490,6 +3644,17 @@ AC_CHECK_HEADERS([blkid/blkid.h])
 # lustre/utils/llverfs.c
 AC_CHECK_HEADERS([ext2fs/ext2fs.h])
 
+# lustre/utils/lfs.c
+AS_IF([test "$enable_dist" = "no"], [
+               AC_CHECK_LIB([z], [crc32], [
+                                AC_CHECK_HEADER([zlib.h], [], [
+                                                AC_MSG_ERROR([zlib.h not found.])])
+                                ], [
+                                AC_MSG_ERROR([
+               zlib library not found. Please install zlib development package.])
+               ])
+])
+
 SELINUX=""
 AC_CHECK_LIB([selinux], [is_selinux_enabled],
        [AC_CHECK_HEADERS([selinux/selinux.h],
@@ -2557,6 +3722,23 @@ AC_MSG_RESULT([$enable_pgstat_track])
 AS_IF([test "x$enable_pgstat_track" = xyes],
        [AC_DEFINE([CONFIG_DEBUG_PAGESTATE_TRACKING], 1,
                [enable page state tracking code])])
+
+PKG_PROG_PKG_CONFIG
+AC_MSG_CHECKING([systemd unit file directory])
+AC_ARG_WITH([systemdsystemunitdir],
+       [AS_HELP_STRING([--with-systemdsystemunitdir=DIR],
+               [Directory for systemd service files])],
+       [], [with_systemdsystemunitdir=auto])
+AS_IF([test "x$with_systemdsystemunitdir" = "xyes" -o "x$with_systemdsystemunitdir" = "xauto"],
+       [def_systemdsystemunitdir=$($PKG_CONFIG --variable=systemdsystemunitdir systemd)
+       AS_IF([test "x$def_systemdsystemunitdir" = "x"],
+               [AS_IF([test "x$with_systemdsystemunitdir" = "xyes"],
+               [AC_MSG_ERROR([systemd support requested but pkg-config unable to query systemd package])])
+               with_systemdsystemunitdir=no],
+       [with_systemdsystemunitdir="$def_systemdsystemunitdir"])])
+AS_IF([test "x$with_systemdsystemunitdir" != "xno"],
+       [AC_SUBST([systemdsystemunitdir], [$with_systemdsystemunitdir])])
+AC_MSG_RESULT([$with_systemdsystemunitdir])
 ]) # LC_CONFIGURE
 
 #
@@ -2574,8 +3756,12 @@ 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(GSS_SSK, test x$enable_ssk = xyes)
 AM_CONDITIONAL(LIBPTHREAD, test x$enable_libpthread = xyes)
-AM_CONDITIONAL(LLITE_LLOOP, test x$enable_llite_lloop_module = xyes)
+AM_CONDITIONAL(HAVE_SYSTEMD, test "x$with_systemdsystemunitdir" != "xno")
+AM_CONDITIONAL(XATTR_HANDLER, test "x$lb_cv_compile_xattr_handler_flags" = xyes)
+AM_CONDITIONAL(SELINUX, test "$SELINUX" = "-lselinux")
+AM_CONDITIONAL(GETSEPOL, test x$enable_getsepol = xyes)
 ]) # LC_CONDITIONALS
 
 #
@@ -2589,24 +3775,24 @@ lustre/Makefile
 lustre/autoMakefile
 lustre/autoconf/Makefile
 lustre/conf/Makefile
+lustre/conf/resource/Makefile
 lustre/contrib/Makefile
 lustre/doc/Makefile
 lustre/include/Makefile
 lustre/include/lustre/Makefile
-lustre/kernel_patches/targets/3.10-rhel7.target
-lustre/kernel_patches/targets/2.6-rhel6.8.target
-lustre/kernel_patches/targets/2.6-rhel6.7.target
-lustre/kernel_patches/targets/2.6-rhel6.6.target
-lustre/kernel_patches/targets/2.6-rhel6.target
-lustre/kernel_patches/targets/2.6-rhel5.target
-lustre/kernel_patches/targets/2.6-sles11.target
+lustre/include/uapi/linux/lustre/Makefile
+lustre/kernel_patches/targets/4.18-rhel8.target
+lustre/kernel_patches/targets/3.10-rhel7.6.target
+lustre/kernel_patches/targets/3.10-rhel7.5.target
+lustre/kernel_patches/targets/4.14-rhel7.5.target
+lustre/kernel_patches/targets/4.14-rhel7.6.target
 lustre/kernel_patches/targets/3.0-sles11.target
 lustre/kernel_patches/targets/3.0-sles11sp3.target
 lustre/kernel_patches/targets/3.0-sles11sp4.target
 lustre/kernel_patches/targets/3.12-sles12.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/4.4-sles12.target
+lustre/kernel_patches/targets/4.4-sles12sp3.target
+lustre/kernel_patches/targets/4.12-sles12sp4.target
 lustre/kernel_patches/targets/3.x-fc18.target
 lustre/ldlm/Makefile
 lustre/fid/Makefile
@@ -2629,7 +3815,6 @@ lustre/fld/Makefile
 lustre/fld/autoMakefile
 lustre/obdclass/Makefile
 lustre/obdclass/autoMakefile
-lustre/obdclass/linux/Makefile
 lustre/obdecho/Makefile
 lustre/obdecho/autoMakefile
 lustre/ofd/Makefile
@@ -2654,8 +3839,11 @@ lustre/ptlrpc/gss/autoMakefile
 lustre/quota/Makefile
 lustre/quota/autoMakefile
 lustre/scripts/Makefile
+lustre/scripts/systemd/Makefile
 lustre/tests/Makefile
 lustre/tests/mpi/Makefile
+lustre/tests/kernel/Makefile
+lustre/tests/kernel/autoMakefile
 lustre/utils/Makefile
 lustre/utils/gss/Makefile
 lustre/osp/Makefile