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zfs/config/kernel-xattr-handler.m4

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Linux 2.6.35 compat, const struct xattr_handler The const keyword was added to the 'struct xattr_handler' in the generic Linux super_block structure. To handle this we define an appropriate xattr_handler_t typedef which can be used. This was the preferred solution because it keeps the code clean and readable.
2011-02-11 00:16:52 +00:00
dnl #
dnl # 2.6.35 API change,
dnl # The 'struct xattr_handler' was constified in the generic
dnl # super_block structure.
dnl #
AC_DEFUN([ZFS_AC_KERNEL_CONST_XATTR_HANDLER],
[AC_MSG_CHECKING([whether super_block uses const struct xattr_hander])
ZFS_LINUX_TRY_COMPILE([
#include <linux/fs.h>
#include <linux/xattr.h>
const struct xattr_handler xattr_test_handler = {
.prefix = "test",
.get = NULL,
.set = NULL,
};
const struct xattr_handler *xattr_handlers[] = {
&xattr_test_handler,
};
],[
struct super_block sb;
sb.s_xattr = xattr_handlers;
],[
AC_MSG_RESULT([yes])
AC_DEFINE(HAVE_CONST_XATTR_HANDLER, 1,
[super_block uses const struct xattr_hander])
],[
AC_MSG_RESULT([no])
])
])
Linux 2.6.33 compat, get/set xattr callbacks The xattr handler prototypes were sanitized with the idea being that the same handlers could be used for multiple methods. The result of this was the inode type was changes to a dentry, and both the get() and set() hooks had a handler_flags argument added. The list() callback was similiarly effected but no autoconf check was added because we do not use the list() callback.
2011-02-11 18:33:01 +00:00
dnl #
dnl # 2.6.33 API change,
dnl # The xattr_hander->get() callback was changed to take a dentry
dnl # instead of an inode, and a handler_flags argument was added.
dnl #
AC_DEFUN([ZFS_AC_KERNEL_XATTR_HANDLER_GET], [
AC_MSG_CHECKING([whether xattr_handler->get() wants dentry])
ZFS_LINUX_TRY_COMPILE([
#include <linux/xattr.h>
],[
int (*get)(struct dentry *dentry, const char *name,
void *buffer, size_t size, int handler_flags) = NULL;
struct xattr_handler xops;
xops.get = get;
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_DENTRY_XATTR_GET, 1,
[xattr_handler->get() wants dentry])
],[
AC_MSG_RESULT(no)
])
])
dnl #
dnl # 2.6.33 API change,
dnl # The xattr_hander->set() callback was changed to take a dentry
dnl # instead of an inode, and a handler_flags argument was added.
dnl #
AC_DEFUN([ZFS_AC_KERNEL_XATTR_HANDLER_SET], [
AC_MSG_CHECKING([whether xattr_handler->set() wants dentry])
ZFS_LINUX_TRY_COMPILE([
#include <linux/xattr.h>
],[
int (*set)(struct dentry *dentry, const char *name,
const void *buffer, size_t size, int flags,
int handler_flags) = NULL;
struct xattr_handler xops;
xops.set = set;
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_DENTRY_XATTR_SET, 1,
[xattr_handler->set() wants dentry])
],[
AC_MSG_RESULT(no)
])
])