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Fix build failures on PaX/GRSecurity patched kernels

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Gentoo Hardened kernels include the PaX/GRSecurity patches. They use a
dialect of C that relies on a GCC plugin. In particular, struct
file_operations has been marked do_const in the PaX/GRSecurity dialect,
which causes GCC to consider all instances of it as const. This caused
failures in the autotools checks and the ZFS source code.

To address this, we modify the autotools checks to take into account
differences between the PaX C dialect and the regular C dialect. We also
modify struct zfs_acl's z_ops member to be a pointer to a function
pointer table. Lastly, we modify zpl_put_link() to address a PaX change
to the function prototype of nd_get_link().  This avoids compiler errors
in the PaX/GRSecurity dialect.

Note that the change in zpl_put_link() causes a warning that becomes a
build failure when debugging is enabled. Fixing that warning requires
ryao/spl@5ca50ef459.

Signed-off-by: Richard Yao <ryao@cs.stonybrook.edu>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #484
This commit is contained in:
Richard Yao
2012-05-30 23:25:31 -04:00
committed by Brian Behlendorf
parent b5a28807cd
commit 0a6b03d3b8
7 changed files with 640 additions and 40 deletions
Download Patch File Download Diff File Expand all files Collapse all files
config/kernel-evict-inode.m4
+3 -3
View File
@@ -7,11 +7,11 @@ AC_DEFUN([ZFS_AC_KERNEL_EVICT_INODE], [
AC_MSG_CHECKING([whether sops->evict_inode() exists])
ZFS_LINUX_TRY_COMPILE([
#include <linux/fs.h>
],[
void (*evict_inode) (struct inode *) = NULL;
struct super_operations sops __attribute__ ((unused)) = {
void evict_inode (struct inode * t) { return; }
static struct super_operations sops __attribute__ ((unused)) = {
.evict_inode = evict_inode,
};
],[
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_EVICT_INODE, 1, [sops->evict_inode() exists])
config/kernel-fallocate.m4
+21
View File
@@ -38,6 +38,26 @@ AC_DEFUN([ZFS_AC_KERNEL_INODE_FALLOCATE], [
])
])
dnl #
dnl # PaX Linux 2.6.38 - 3.x API
dnl #
AC_DEFUN([ZFS_AC_PAX_KERNEL_FILE_FALLOCATE], [
AC_MSG_CHECKING([whether fops->fallocate() exists])
ZFS_LINUX_TRY_COMPILE([
#include <linux/fs.h>
],[
long (*fallocate) (struct file *, int, loff_t, loff_t) = NULL;
struct file_operations_no_const fops __attribute__ ((unused)) = {
.fallocate = fallocate,
};
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_FILE_FALLOCATE, 1, [fops->fallocate() exists])
],[
AC_MSG_RESULT(no)
])
])
dnl #
dnl # The fallocate callback was moved from the inode_operations
dnl # structure to the file_operations structure.
@@ -45,4 +65,5 @@ dnl #
AC_DEFUN([ZFS_AC_KERNEL_FALLOCATE], [
ZFS_AC_KERNEL_FILE_FALLOCATE
ZFS_AC_KERNEL_INODE_FALLOCATE
ZFS_AC_PAX_KERNEL_FILE_FALLOCATE
])
config/kernel-fsync.m4
+61 -1
View File
@@ -37,7 +37,7 @@ AC_DEFUN([ZFS_AC_KERNEL_FSYNC_WITHOUT_DENTRY], [
])
dnl #
dnl # Linux 3.1 -x 3.x API
dnl # Linux 3.1 - 3.x API
dnl #
AC_DEFUN([ZFS_AC_KERNEL_FSYNC_RANGE], [
ZFS_LINUX_TRY_COMPILE([
@@ -55,9 +55,69 @@ AC_DEFUN([ZFS_AC_KERNEL_FSYNC_RANGE], [
])
])
dnl #
dnl # PaX Linux 2.6.x - 2.6.34 API
dnl #
AC_DEFUN([ZFS_AC_PAX_KERNEL_FSYNC_WITH_DENTRY], [
ZFS_LINUX_TRY_COMPILE([
#include <linux/fs.h>
],[
int (*fsync) (struct file *, struct dentry *, int) = NULL;
file_operations_no_const fops __attribute__ ((unused));
fops.fsync = fsync;
],[
AC_MSG_RESULT([dentry])
AC_DEFINE(HAVE_FSYNC_WITH_DENTRY, 1,
[fops->fsync() with dentry])
],[
])
])
dnl #
dnl # PaX Linux 2.6.35 - Linux 3.0 API
dnl #
AC_DEFUN([ZFS_AC_PAX_KERNEL_FSYNC_WITHOUT_DENTRY], [
ZFS_LINUX_TRY_COMPILE([
#include <linux/fs.h>
],[
int (*fsync) (struct file *, int) = NULL;
file_operations_no_const fops __attribute__ ((unused));
fops.fsync = fsync;
],[
AC_MSG_RESULT([no dentry])
AC_DEFINE(HAVE_FSYNC_WITHOUT_DENTRY, 1,
[fops->fsync() without dentry])
],[
])
])
dnl #
dnl # PaX Linux 3.1 - 3.x API
dnl #
AC_DEFUN([ZFS_AC_PAX_KERNEL_FSYNC_RANGE], [
ZFS_LINUX_TRY_COMPILE([
#include <linux/fs.h>
],[
int (*fsync) (struct file *, loff_t, loff_t, int) = NULL;
file_operations_no_const fops __attribute__ ((unused));
fops.fsync = fsync;
],[
AC_MSG_RESULT([range])
AC_DEFINE(HAVE_FSYNC_RANGE, 1,
[fops->fsync() with range])
],[
])
])
AC_DEFUN([ZFS_AC_KERNEL_FSYNC], [
AC_MSG_CHECKING([whether fops->fsync() wants])
ZFS_AC_KERNEL_FSYNC_WITH_DENTRY
ZFS_AC_KERNEL_FSYNC_WITHOUT_DENTRY
ZFS_AC_KERNEL_FSYNC_RANGE
ZFS_AC_PAX_KERNEL_FSYNC_WITH_DENTRY
ZFS_AC_PAX_KERNEL_FSYNC_WITHOUT_DENTRY
ZFS_AC_PAX_KERNEL_FSYNC_RANGE
])