1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
|
dnl #
dnl # 2.6.35 API change,
dnl # The cachep->gfpflags member was renamed cachep->allocflags. These are
dnl # private allocation flags which are applied when allocating a new slab
dnl # in kmem_getpages(). Unfortunately there is no public API for setting
dnl # non-default flags.
dnl #
AC_DEFUN([ZFS_AC_KERNEL_KMEM_CACHE_ALLOCFLAGS], [
AC_MSG_CHECKING([whether struct kmem_cache has allocflags])
ZFS_LINUX_TRY_COMPILE([
#include <linux/slab.h>
],[
struct kmem_cache cachep __attribute__ ((unused));
cachep.allocflags = GFP_KERNEL;
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_KMEM_CACHE_ALLOCFLAGS, 1,
[struct kmem_cache has allocflags])
],[
AC_MSG_RESULT(no)
AC_MSG_CHECKING([whether struct kmem_cache has gfpflags])
ZFS_LINUX_TRY_COMPILE([
#include <linux/slab.h>
],[
struct kmem_cache cachep __attribute__ ((unused));
cachep.gfpflags = GFP_KERNEL;
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_KMEM_CACHE_GFPFLAGS, 1,
[struct kmem_cache has gfpflags])
],[
AC_MSG_RESULT(no)
])
])
])
dnl #
dnl # grsecurity API change,
dnl # kmem_cache_create() with SLAB_USERCOPY flag replaced by
dnl # kmem_cache_create_usercopy().
dnl #
AC_DEFUN([ZFS_AC_KERNEL_KMEM_CACHE_CREATE_USERCOPY], [
AC_MSG_CHECKING([whether kmem_cache_create_usercopy() exists])
tmp_flags="$EXTRA_KCFLAGS"
EXTRA_KCFLAGS="-Werror"
ZFS_LINUX_TRY_COMPILE([
#include <linux/slab.h>
static void ctor(void *foo)
{
// fake ctor
}
],[
struct kmem_cache *skc_linux_cache;
const char *name = "test";
size_t size = 4096;
size_t align = 8;
unsigned long flags = 0;
size_t useroffset = 0;
size_t usersize = size - useroffset;
skc_linux_cache = kmem_cache_create_usercopy(
name, size, align, flags, useroffset, usersize, ctor);
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_KMEM_CACHE_CREATE_USERCOPY, 1,
[kmem_cache_create_usercopy() exists])
],[
AC_MSG_RESULT(no)
])
EXTRA_KCFLAGS="$tmp_flags"
])
|
