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Linux 3.1 compat, vfs_fsync()

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Preferentially use the vfs_fsync() function.  This function was
initially introduced in 2.6.29 and took three arguments.  As
of 2.6.35 the dentry argument was dropped from the function.
For older kernels fall back to using file_fsync() which also
took three arguments including the dentry.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Issue #52
This commit is contained in:
Brian Behlendorf
2011-11-09 12:45:35 -08:00
parent 12ff95ff57
commit 0d0b523728
4 changed files with 248 additions and 147 deletions
Download Patch File Download Diff File Expand all files Collapse all files
config/spl-build.m4
+21 -9
View File
@@ -68,13 +68,14 @@ AC_DEFUN([SPL_AC_CONFIG_KERNEL], [
SPL_AC_2ARGS_SET_FS_PWD
SPL_AC_2ARGS_VFS_UNLINK
SPL_AC_4ARGS_VFS_RENAME
SPL_AC_VFS_FSYNC
SPL_AC_2ARGS_VFS_FSYNC
SPL_AC_FS_STRUCT_SPINLOCK
SPL_AC_CRED_STRUCT
SPL_AC_GROUPS_SEARCH
SPL_AC_PUT_TASK_STRUCT
SPL_AC_5ARGS_PROC_HANDLER
SPL_AC_KVASPRINTF
SPL_AC_3ARGS_FILE_FSYNC
SPL_AC_EXPORTED_RWSEM_IS_LOCKED
SPL_AC_KERNEL_INVALIDATE_INODES
SPL_AC_KERNEL_2ARGS_INVALIDATE_INODES
@@ -1718,19 +1719,30 @@ AC_DEFUN([SPL_AC_KVASPRINTF], [
])
dnl #
dnl # 2.6.35 API change,
dnl # Unused 'struct dentry *' removed from prototype.
dnl # 2.6.29 API change,
dnl # vfs_fsync() funcation added, prior to this use file_fsync().
dnl #
AC_DEFUN([SPL_AC_3ARGS_FILE_FSYNC], [
AC_MSG_CHECKING([whether file_fsync() wants 3 args])
AC_DEFUN([SPL_AC_VFS_FSYNC], [
SPL_CHECK_SYMBOL_EXPORT(
[vfs_fsync],
[fs/sync.c],
[AC_DEFINE(HAVE_VFS_FSYNC, 1, [vfs_fsync() is available])],
[])
])
dnl #
dnl # 2.6.35 API change,
dnl # Unused 'struct dentry *' removed from vfs_fsync() prototype.
dnl #
AC_DEFUN([SPL_AC_2ARGS_VFS_FSYNC], [
AC_MSG_CHECKING([whether vfs_fsync() wants 2 args])
SPL_LINUX_TRY_COMPILE([
#include <linux/buffer_head.h>
#include <linux/fs.h>
],[
file_fsync(NULL, NULL, 0);
vfs_fsync(NULL, 0);
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_3ARGS_FILE_FSYNC, 1,
[file_fsync() wants 3 args])
AC_DEFINE(HAVE_2ARGS_VFS_FSYNC, 1, [vfs_fsync() wants 2 args])
],[
AC_MSG_RESULT(no)
])