LU-6215 llite: handle kernel symlink api changes in 4.2+

[fs/lustre-release.git] / lustre / autoconf / lustre-core.m4

diff --git a/lustre/autoconf/lustre-core.m4 b/lustre/autoconf/lustre-core.m4
index 0d83e19..97f1a2d 100644 (file)
--- a/lustre/autoconf/lustre-core.m4
+++ b/lustre/autoconf/lustre-core.m4
@@ -1786,9 +1786,48 @@ ki_nbytes, [
 ]) # LC_KIOCB_HAS_NBYTES
 
 #
+# LC_BACKING_DEV_INFO_REMOVAL
+#
+# 3.20 kernel removed backing_dev_info from address_space
+#
+AC_DEFUN([LC_BACKING_DEV_INFO_REMOVAL], [
+LB_CHECK_COMPILE([if struct address_space has backing_dev_info],
+backing_dev_info, [
+       #include <linux/fs.h>
+],[
+       struct address_space mapping;
+
+       mapping.backing_dev_info = NULL;
+],[
+       AC_DEFINE(HAVE_BACKING_DEV_INFO, 1, [backing_dev_info exist])
+])
+]) # LC_BACKING_DEV_INFO_REMOVAL
+
+#
+# LC_HAVE_BDI_CAP_MAP_COPY
+#
+# 3.20  removed mmap handling for backing devices since
+#      it breaks on non-MMU systems. See kernel commit
+#      b4caecd48005fbed3949dde6c1cb233142fd69e9
+#
+AC_DEFUN([LC_HAVE_BDI_CAP_MAP_COPY], [
+LB_CHECK_COMPILE([if have 'BDI_CAP_MAP_COPY'],
+bdi_cap_map_copy, [
+       #include <linux/backing-dev.h>
+],[
+       struct backing_dev_info info;
+
+       info.capabilities = BDI_CAP_MAP_COPY;
+],[
+       AC_DEFINE(HAVE_BDI_CAP_MAP_COPY, 1,
+               [BDI_CAP_MAP_COPY exist])
+])
+]) # LC_HAVE_BDI_CAP_MAP_COPY
+
+#
 # LC_CANCEL_DIRTY_PAGE
 #
-# 4.0.0 kernel removed cancle_dirty_page
+# 4.0.0 kernel removed cancel_dirty_page
 #
 AC_DEFUN([LC_CANCEL_DIRTY_PAGE], [
 LB_CHECK_COMPILE([if cancel_dirty_page still exist],
@@ -1834,6 +1873,45 @@ LB_CHECK_EXPORT([new_sync_read], [fs/read_write.c],
 ]) # LC_HAVE_SYNC_READ_WRITE
 
 #
+# LC_NEW_CANCEL_DIRTY_PAGE
+#
+# 4.2 kernel has new cancel_dirty_page
+#
+AC_DEFUN([LC_NEW_CANCEL_DIRTY_PAGE], [
+LB_CHECK_COMPILE([if cancel_dirty_page with one argument exist],
+new_cancel_dirty_page, [
+       #include <linux/mm.h>
+],[
+       cancel_dirty_page(NULL);
+],[
+       AC_DEFINE(HAVE_NEW_CANCEL_DIRTY_PAGE, 1,
+               [cancel_dirty_page with one arguement is available])
+])
+]) # LC_NEW_CANCEL_DIRTY_PAGE
+
+#
+# LC_SYMLINK_OPS_USE_NAMEIDATA
+#
+# For the 4.2+ kernels the file system internal symlink api no
+# longer uses struct nameidata as a argument
+#
+AC_DEFUN([LC_SYMLINK_OPS_USE_NAMEIDATA], [
+LB_CHECK_COMPILE([if symlink inode operations have struct nameidata argument],
+symlink_use_nameidata, [
+       #include <linux/namei.h>
+       #include <linux/fs.h>
+],[
+       struct nameidata *nd = NULL;
+
+       ((struct inode_operations *)0)->follow_link(NULL, nd);
+       ((struct inode_operations *)0)->put_link(NULL, nd, NULL);
+],[
+       AC_DEFINE(HAVE_SYMLINK_OPS_USE_NAMEIDATA, 1,
+               [symlink inode operations need struct nameidata argument])
+])
+]) # LC_SYMLINK_OPS_USE_NAMEIDATA
+
+#
 # LC_PROG_LINUX
 #
 # Lustre linux kernel checks
@@ -1977,6 +2055,10 @@ AC_DEFUN([LC_PROG_LINUX], [
        # 3.19
        LC_KIOCB_HAS_NBYTES
 
+       # 3.20
+       LC_BACKING_DEV_INFO_REMOVAL
+       LC_HAVE_BDI_CAP_MAP_COPY
+
        # 4.0.0
        LC_CANCEL_DIRTY_PAGE
 
@@ -1984,6 +2066,10 @@ AC_DEFUN([LC_PROG_LINUX], [
        LC_IOV_ITER_RW
        LC_HAVE_SYNC_READ_WRITE
 
+       # 4.2
+       LC_NEW_CANCEL_DIRTY_PAGE
+       LC_SYMLINK_OPS_USE_NAMEIDATA
+
        #
        AS_IF([test "x$enable_server" != xno], [
                LC_FUNC_DEV_SET_RDONLY
@@ -2296,6 +2382,7 @@ lustre/include/Makefile
 lustre/include/lustre_ver.h
 lustre/include/lustre/Makefile
 lustre/kernel_patches/targets/3.10-rhel7.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