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zfs/config/kernel-show-options.m4

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Linux 3.3 compat, sops->show_options() The second argument of sops->show_options() was changed from a 'struct vfsmount *' to a 'struct dentry *'. Add an autoconf check to detect the API change and then conditionally define the expected interface. In either case we are only interested in the zfs_sb_t. Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Closes #549
2012-02-02 19:55:48 +00:00
dnl #
dnl # Linux 3.3 API
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SHOW_OPTIONS], [
AC_MSG_CHECKING([whether sops->show_options() wants dentry])
ZFS_LINUX_TRY_COMPILE([
#include <linux/fs.h>
Fix NULL pointer dereference on PaX/GRSecurity patched Linux 3.3 and later kernels Support for PaX/GRSecurity patched kernels was developed against Linux 3.2. Unfortunately, an autotools check introduced for a Linux 3.3 API fails on PaX/GRSecurity patched kernels. This causes the module to be built against the Linux 3.2 ABI, which results in a NULL pointer dereference at runtime. Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Richard Yao <ryao@cs.stonybrook.edu> Closes #794 Closes #809
2012-07-19 22:37:56 +00:00
int show_options (struct seq_file * x, struct dentry * y) { return 0; };
static struct super_operations sops __attribute__ ((unused)) = {
.show_options = show_options,
};
],[
Linux 3.3 compat, sops->show_options() The second argument of sops->show_options() was changed from a 'struct vfsmount *' to a 'struct dentry *'. Add an autoconf check to detect the API change and then conditionally define the expected interface. In either case we are only interested in the zfs_sb_t. Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Closes #549
2012-02-02 19:55:48 +00:00
],[
AC_MSG_RESULT([yes])
AC_DEFINE(HAVE_SHOW_OPTIONS_WITH_DENTRY, 1,
[sops->show_options() with dentry])
],[
AC_MSG_RESULT([no])
])
])