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Split spl-build.m4 

Split the kernel interface configure checks in to seperate m4
macro files.  This is intended to facilitate moving the spl
source code in to the zfs repository.

Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #682
This commit is contained in:
Brian Behlendorf 2018-02-07 11:50:24 -08:00 committed by GitHub
parent 5461eefe50
commit 48ef8ba070
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
22 changed files with 932 additions and 956 deletions
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18
config/kernel-ctl-table-name.m4 Normal file
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dnl #
dnl # 2.6.33 API change,
dnl # Removed .ctl_name from struct ctl_table.
dnl #
AC_DEFUN([SPL_AC_CTL_NAME], [
AC_MSG_CHECKING([whether struct ctl_table has ctl_name])
SPL_LINUX_TRY_COMPILE([
#include <linux/sysctl.h>
],[
struct ctl_table ctl __attribute__ ((unused));
ctl.ctl_name = 0;
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_CTL_NAME, 1, [struct ctl_table has ctl_name])
],[
AC_MSG_RESULT(no)
])
])

68
config/kernel-fallocate.m4 Normal file
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dnl #
dnl # Linux 2.6.38 - 3.x API
dnl #
AC_DEFUN([SPL_AC_KERNEL_FILE_FALLOCATE], [
AC_MSG_CHECKING([whether fops->fallocate() exists])
SPL_LINUX_TRY_COMPILE([
#include <linux/fs.h>
],[
long (*fallocate) (struct file *, int, loff_t, loff_t) = NULL;
struct file_operations fops __attribute__ ((unused)) = {
.fallocate = fallocate,
};
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_FILE_FALLOCATE, 1, [fops->fallocate() exists])
],[
AC_MSG_RESULT(no)
])
])
dnl #
dnl # Linux 2.6.x - 2.6.37 API
dnl #
AC_DEFUN([SPL_AC_KERNEL_INODE_FALLOCATE], [
AC_MSG_CHECKING([whether iops->fallocate() exists])
SPL_LINUX_TRY_COMPILE([
#include <linux/fs.h>
],[
long (*fallocate) (struct inode *, int, loff_t, loff_t) = NULL;
struct inode_operations fops __attribute__ ((unused)) = {
.fallocate = fallocate,
};
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_INODE_FALLOCATE, 1, [fops->fallocate() exists])
],[
AC_MSG_RESULT(no)
])
])
dnl #
dnl # PaX Linux 2.6.38 - 3.x API
dnl #
AC_DEFUN([SPL_AC_PAX_KERNEL_FILE_FALLOCATE], [
AC_MSG_CHECKING([whether fops->fallocate() exists])
SPL_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.
dnl #
AC_DEFUN([SPL_AC_KERNEL_FALLOCATE], [
SPL_AC_KERNEL_FILE_FALLOCATE
SPL_AC_KERNEL_INODE_FALLOCATE
SPL_AC_PAX_KERNEL_FILE_FALLOCATE
])

21
config/kernel-group-info.m4 Normal file
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dnl #
dnl # 4.9 API change
dnl # group_info changed from 2d array via >blocks to 1d array via ->gid
dnl #
AC_DEFUN([SPL_AC_GROUP_INFO_GID], [
AC_MSG_CHECKING([whether group_info->gid exists])
tmp_flags="$EXTRA_KCFLAGS"
EXTRA_KCFLAGS="-Werror"
SPL_LINUX_TRY_COMPILE([
#include <linux/cred.h>
],[
struct group_info *gi = groups_alloc(1);
gi->gid[0] = KGIDT_INIT(0);
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_GROUP_INFO_GID, 1, [group_info->gid exists])
],[
AC_MSG_RESULT(no)
])
EXTRA_KCFLAGS="$tmp_flags"
])

23
config/kernel-inode-lock.m4 Normal file
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dnl #
dnl # 4.7 API change
dnl # i_mutex is changed to i_rwsem. Instead of directly using
dnl # i_mutex/i_rwsem, we should use inode_lock() and inode_lock_shared()
dnl # We test inode_lock_shared because inode_lock is introduced earlier.
dnl #
AC_DEFUN([SPL_AC_INODE_LOCK], [
AC_MSG_CHECKING([whether inode_lock_shared() exists])
tmp_flags="$EXTRA_KCFLAGS"
EXTRA_KCFLAGS="-Werror"
SPL_LINUX_TRY_COMPILE([
#include <linux/fs.h>
],[
struct inode *inode = NULL;
inode_lock_shared(inode);
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_INODE_LOCK_SHARED, 1, [yes])
],[
AC_MSG_RESULT(no)
])
EXTRA_KCFLAGS="$tmp_flags"
])

72
config/kernel-kmem-cache.m4 Normal file
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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([SPL_AC_KMEM_CACHE_ALLOCFLAGS], [
AC_MSG_CHECKING([whether struct kmem_cache has allocflags])
SPL_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])
SPL_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([SPL_AC_KMEM_CACHE_CREATE_USERCOPY], [
AC_MSG_CHECKING([whether kmem_cache_create_usercopy() exists])
tmp_flags="$EXTRA_KCFLAGS"
EXTRA_KCFLAGS="-Werror"
SPL_LINUX_TRY_COMPILE([
#include <linux/slab.h>
static void ctor(void *foo)
{
// fake ctor
}
],[
struct kmem_cache *skc_linux_cache;
const char *name = "test";
size_t size = 4096;
size_t align = 8;
unsigned long flags = 0;
size_t useroffset = 0;
size_t usersize = size - useroffset;
skc_linux_cache = kmem_cache_create_usercopy(
name, size, align, flags, useroffset, usersize, ctor);
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_KMEM_CACHE_CREATE_USERCOPY, 1,
[kmem_cache_create_usercopy() exists])
],[
AC_MSG_RESULT(no)
])
EXTRA_KCFLAGS="$tmp_flags"
])

28
config/kernel-kuidgid.m4 Normal file
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dnl #
dnl # User namespaces, use kuid_t in place of uid_t
dnl # where available. Not strictly a user namespaces thing
dnl # but it should prevent surprises
dnl #
AC_DEFUN([SPL_AC_KUIDGID_T], [
AC_MSG_CHECKING([whether kuid_t/kgid_t is available])
SPL_LINUX_TRY_COMPILE([
#include <linux/uidgid.h>
], [
kuid_t userid = KUIDT_INIT(0);
kgid_t groupid = KGIDT_INIT(0);
],[
SPL_LINUX_TRY_COMPILE([
#include <linux/uidgid.h>
], [
kuid_t userid = 0;
kgid_t groupid = 0;
],[
AC_MSG_RESULT(yes; optional)
],[
AC_MSG_RESULT(yes; mandatory)
AC_DEFINE(HAVE_KUIDGID_T, 1, [kuid_t/kgid_t in use])
])
],[
AC_MSG_RESULT(no)
])
])

17
config/kernel-pde-data.m4 Normal file
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dnl #
dnl # 3.10 API change,
dnl # PDE is replaced by PDE_DATA
dnl #
AC_DEFUN([SPL_AC_PDE_DATA], [
AC_MSG_CHECKING([whether PDE_DATA() is available])
SPL_LINUX_TRY_COMPILE_SYMBOL([
#include <linux/proc_fs.h>
], [
PDE_DATA(NULL);
], [PDE_DATA], [], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_PDE_DATA, 1, [yes])
],[
AC_MSG_RESULT(no)
])
])

57
config/kernel-rw.m4 Normal file
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dnl #
dnl # 4.14 API change
dnl # kernel_write() which was introduced in 3.9 was updated to take
dnl # the offset as a pointer which is needed by vn_rdwr().
dnl #
AC_DEFUN([SPL_AC_KERNEL_WRITE], [
AC_MSG_CHECKING([whether kernel_write() takes loff_t pointer])
tmp_flags="$EXTRA_KCFLAGS"
EXTRA_KCFLAGS="-Werror"
SPL_LINUX_TRY_COMPILE([
#include <linux/fs.h>
],[
struct file *file = NULL;
const void *buf = NULL;
size_t count = 0;
loff_t *pos = NULL;
ssize_t ret;
ret = kernel_write(file, buf, count, pos);
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_KERNEL_WRITE_PPOS, 1,
[kernel_write() take loff_t pointer])
],[
AC_MSG_RESULT(no)
])
EXTRA_KCFLAGS="$tmp_flags"
])
dnl #
dnl # 4.14 API change
dnl # kernel_read() which has existed for forever was updated to take
dnl # the offset as a pointer which is needed by vn_rdwr().
dnl #
AC_DEFUN([SPL_AC_KERNEL_READ], [
AC_MSG_CHECKING([whether kernel_read() takes loff_t pointer])
tmp_flags="$EXTRA_KCFLAGS"
EXTRA_KCFLAGS="-Werror"
SPL_LINUX_TRY_COMPILE([
#include <linux/fs.h>
],[
struct file *file = NULL;
void *buf = NULL;
size_t count = 0;
loff_t *pos = NULL;
ssize_t ret;
ret = kernel_read(file, buf, count, pos);
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_KERNEL_READ_PPOS, 1,
[kernel_read() take loff_t pointer])
],[
AC_MSG_RESULT(no)
])
EXTRA_KCFLAGS="$tmp_flags"
])

75
config/kernel-rwsem.m4 Normal file
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dnl #
dnl # 3.1 API Change
dnl #
dnl # The rw_semaphore.wait_lock member was changed from spinlock_t to
dnl # raw_spinlock_t at commit ddb6c9b58a19edcfac93ac670b066c836ff729f1.
dnl #
AC_DEFUN([SPL_AC_RWSEM_SPINLOCK_IS_RAW], [
AC_MSG_CHECKING([whether struct rw_semaphore member wait_lock is raw])
tmp_flags="$EXTRA_KCFLAGS"
EXTRA_KCFLAGS="-Werror"
SPL_LINUX_TRY_COMPILE([
#include <linux/rwsem.h>
],[
struct rw_semaphore dummy_semaphore __attribute__ ((unused));
raw_spinlock_t dummy_lock __attribute__ ((unused)) =
__RAW_SPIN_LOCK_INITIALIZER(dummy_lock);
dummy_semaphore.wait_lock = dummy_lock;
],[
AC_MSG_RESULT(yes)
AC_DEFINE(RWSEM_SPINLOCK_IS_RAW, 1,
[struct rw_semaphore member wait_lock is raw_spinlock_t])
],[
AC_MSG_RESULT(no)
])
EXTRA_KCFLAGS="$tmp_flags"
])
dnl #
dnl # 3.16 API Change
dnl #
dnl # rwsem-spinlock "->activity" changed to "->count"
dnl #
AC_DEFUN([SPL_AC_RWSEM_ACTIVITY], [
AC_MSG_CHECKING([whether struct rw_semaphore has member activity])
tmp_flags="$EXTRA_KCFLAGS"
EXTRA_KCFLAGS="-Werror"
SPL_LINUX_TRY_COMPILE([
#include <linux/rwsem.h>
],[
struct rw_semaphore dummy_semaphore __attribute__ ((unused));
dummy_semaphore.activity = 0;
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_RWSEM_ACTIVITY, 1,
[struct rw_semaphore has member activity])
],[
AC_MSG_RESULT(no)
])
EXTRA_KCFLAGS="$tmp_flags"
])
dnl #
dnl # 4.8 API Change
dnl #
dnl # rwsem "->count" changed to atomic_long_t type
dnl #
AC_DEFUN([SPL_AC_RWSEM_ATOMIC_LONG_COUNT], [
AC_MSG_CHECKING(
[whether struct rw_semaphore has atomic_long_t member count])
tmp_flags="$EXTRA_KCFLAGS"
EXTRA_KCFLAGS="-Werror"
SPL_LINUX_TRY_COMPILE([
#include <linux/rwsem.h>
],[
DECLARE_RWSEM(dummy_semaphore);
(void) atomic_long_read(&dummy_semaphore.count);
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_RWSEM_ATOMIC_LONG_COUNT, 1,
[struct rw_semaphore has atomic_long_t member count])
],[
AC_MSG_RESULT(no)
])
EXTRA_KCFLAGS="$tmp_flags"
])

56
config/kernel-sched.m4 Normal file
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dnl #
dnl # 3.9 API change,
dnl # Moved things from linux/sched.h to linux/sched/rt.h
dnl #
AC_DEFUN([SPL_AC_SCHED_RT_HEADER],
[AC_MSG_CHECKING([whether header linux/sched/rt.h exists])
SPL_LINUX_TRY_COMPILE([
#include <linux/sched.h>
#include <linux/sched/rt.h>
],[
return 0;
],[
AC_DEFINE(HAVE_SCHED_RT_HEADER, 1, [linux/sched/rt.h exists])
AC_MSG_RESULT(yes)
],[
AC_MSG_RESULT(no)
])
])
dnl #
dnl # 4.11 API change,
dnl # Moved things from linux/sched.h to linux/sched/signal.h
dnl #
AC_DEFUN([SPL_AC_SCHED_SIGNAL_HEADER],
[AC_MSG_CHECKING([whether header linux/sched/signal.h exists])
SPL_LINUX_TRY_COMPILE([
#include <linux/sched.h>
#include <linux/sched/signal.h>
],[
return 0;
],[
AC_DEFINE(HAVE_SCHED_SIGNAL_HEADER, 1, [linux/sched/signal.h exists])
AC_MSG_RESULT(yes)
],[
AC_MSG_RESULT(no)
])
])
dnl #
dnl # 3.19 API change
dnl # The io_schedule_timeout() function is present in all 2.6.32 kernels
dnl # but it was not exported until Linux 3.19. The RHEL 7.x kernels which
dnl # are based on a 3.10 kernel do export this symbol.
dnl #
AC_DEFUN([SPL_AC_IO_SCHEDULE_TIMEOUT], [
AC_MSG_CHECKING([whether io_schedule_timeout() is available])
SPL_LINUX_TRY_COMPILE_SYMBOL([
#include <linux/sched.h>
], [
(void) io_schedule_timeout(1);
], [io_schedule_timeout], [], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_IO_SCHEDULE_TIMEOUT, 1, [yes])
],[
AC_MSG_RESULT(no)
])
])

39
config/kernel-set-fs-pwd.m4 Normal file
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dnl #
dnl # 3.9 API change
dnl # set_fs_pwd takes const struct path *
dnl #
AC_DEFUN([SPL_AC_SET_FS_PWD_WITH_CONST],
tmp_flags="$EXTRA_KCFLAGS"
EXTRA_KCFLAGS="-Werror"
[AC_MSG_CHECKING([whether set_fs_pwd() requires const struct path *])
SPL_LINUX_TRY_COMPILE([
#include <linux/spinlock.h>
#include <linux/fs_struct.h>
#include <linux/path.h>
void (*const set_fs_pwd_func)
(struct fs_struct *, const struct path *)
= set_fs_pwd;
],[
return 0;
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_SET_FS_PWD_WITH_CONST, 1,
[set_fs_pwd() needs const path *])
],[
SPL_LINUX_TRY_COMPILE([
#include <linux/spinlock.h>
#include <linux/fs_struct.h>
#include <linux/path.h>
void (*const set_fs_pwd_func)
(struct fs_struct *, struct path *)
= set_fs_pwd;
],[
return 0;
],[
AC_MSG_RESULT(no)
],[
AC_MSG_ERROR(unknown)
])
])
EXTRA_KCFLAGS="$tmp_flags"
])

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config/kernel-shrinker.m4 Normal file
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AC_DEFUN([SPL_AC_SHRINKER_CALLBACK],[
tmp_flags="$EXTRA_KCFLAGS"
EXTRA_KCFLAGS="-Werror"
dnl #
dnl # 2.6.23 to 2.6.34 API change
dnl # ->shrink(int nr_to_scan, gfp_t gfp_mask)
dnl #
AC_MSG_CHECKING([whether old 2-argument shrinker exists])
SPL_LINUX_TRY_COMPILE([
#include <linux/mm.h>
int shrinker_cb(int nr_to_scan, gfp_t gfp_mask);
],[
struct shrinker cache_shrinker = {
.shrink = shrinker_cb,
.seeks = DEFAULT_SEEKS,
};
register_shrinker(&cache_shrinker);
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_2ARGS_OLD_SHRINKER_CALLBACK, 1,
[old shrinker callback wants 2 args])
],[
AC_MSG_RESULT(no)
dnl #
dnl # 2.6.35 - 2.6.39 API change
dnl # ->shrink(struct shrinker *,
dnl # int nr_to_scan, gfp_t gfp_mask)
dnl #
AC_MSG_CHECKING([whether old 3-argument shrinker exists])
SPL_LINUX_TRY_COMPILE([
#include <linux/mm.h>
int shrinker_cb(struct shrinker *, int nr_to_scan,
gfp_t gfp_mask);
],[
struct shrinker cache_shrinker = {
.shrink = shrinker_cb,
.seeks = DEFAULT_SEEKS,
};
register_shrinker(&cache_shrinker);
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_3ARGS_SHRINKER_CALLBACK, 1,
[old shrinker callback wants 3 args])
],[
AC_MSG_RESULT(no)
dnl #
dnl # 3.0 - 3.11 API change
dnl # ->shrink(struct shrinker *,
dnl # struct shrink_control *sc)
dnl #
AC_MSG_CHECKING(
[whether new 2-argument shrinker exists])
SPL_LINUX_TRY_COMPILE([
#include <linux/mm.h>
int shrinker_cb(struct shrinker *,
struct shrink_control *sc);
],[
struct shrinker cache_shrinker = {
.shrink = shrinker_cb,
.seeks = DEFAULT_SEEKS,
};
register_shrinker(&cache_shrinker);
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_2ARGS_NEW_SHRINKER_CALLBACK, 1,
[new shrinker callback wants 2 args])
],[
AC_MSG_RESULT(no)
dnl #
dnl # 3.12 API change,
dnl # ->shrink() is logically split in to
dnl # ->count_objects() and ->scan_objects()
dnl #
AC_MSG_CHECKING(
[whether ->count_objects callback exists])
SPL_LINUX_TRY_COMPILE([
#include <linux/mm.h>
unsigned long shrinker_cb(
struct shrinker *,
struct shrink_control *sc);
],[
struct shrinker cache_shrinker = {
.count_objects = shrinker_cb,
.scan_objects = shrinker_cb,
.seeks = DEFAULT_SEEKS,
};
register_shrinker(&cache_shrinker);
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_SPLIT_SHRINKER_CALLBACK,
1, [->count_objects exists])
],[
AC_MSG_ERROR(error)
])
])
])
])
EXTRA_KCFLAGS="$tmp_flags"
])
dnl #
dnl # 2.6.39 API change,
dnl # Shrinker adjust to use common shrink_control structure.
dnl #
AC_DEFUN([SPL_AC_SHRINK_CONTROL_STRUCT], [
AC_MSG_CHECKING([whether struct shrink_control exists])
SPL_LINUX_TRY_COMPILE([
#include <linux/mm.h>
],[
struct shrink_control sc __attribute__ ((unused));
sc.nr_to_scan = 0;
sc.gfp_mask = GFP_KERNEL;
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_SHRINK_CONTROL_STRUCT, 1,
[struct shrink_control exists])
],[
AC_MSG_RESULT(no)
])
])

24
config/kernel-spinlock.m4 Normal file
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dnl #
dnl # 2.6.36 API change,
dnl # The 'struct fs_struct->lock' was changed from a rwlock_t to
dnl # a spinlock_t to improve the fastpath performance.
dnl #
AC_DEFUN([SPL_AC_FS_STRUCT_SPINLOCK], [
AC_MSG_CHECKING([whether struct fs_struct uses spinlock_t])
tmp_flags="$EXTRA_KCFLAGS"
EXTRA_KCFLAGS="-Werror"
SPL_LINUX_TRY_COMPILE([
#include <linux/sched.h>
#include <linux/fs_struct.h>
],[
static struct fs_struct fs;
spin_lock_init(&fs.lock);
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_FS_STRUCT_SPINLOCK, 1,
[struct fs_struct uses spinlock_t])
],[
AC_MSG_RESULT(no)
])
EXTRA_KCFLAGS="$tmp_flags"
])

32
config/kernel-timer.m4 Normal file
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dnl #
dnl # 4.15 API change
dnl # https://lkml.org/lkml/2017/11/25/90
dnl # Check if timer_list.func get passed a timer_list or an unsigned long
dnl # (older kernels). Also sanity check the from_timer() and timer_setup()
dnl # macros are available as well, since they will be used in the same newer
dnl # kernels that support the new timer_list.func signature.
dnl #
AC_DEFUN([SPL_AC_KERNEL_TIMER_FUNCTION_TIMER_LIST], [
AC_MSG_CHECKING([whether timer_list.function gets a timer_list])
tmp_flags="$EXTRA_KCFLAGS"
EXTRA_KCFLAGS="-Werror"
SPL_LINUX_TRY_COMPILE([
#include <linux/timer.h>
void task_expire(struct timer_list *tl) {}
],[
#ifndef from_timer
#error "No from_timer() macro"
#endif
struct timer_list timer;
timer.function = task_expire;
timer_setup(&timer, NULL, 0);
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_KERNEL_TIMER_FUNCTION_TIMER_LIST, 1,
[timer_list.function gets a timer_list])
],[
AC_MSG_RESULT(no)
])
EXTRA_KCFLAGS="$tmp_flags"
])

19
config/kernel-trim-unused-symbols.m4 Normal file
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dnl #
dnl # config trim unused symbols,
dnl # Verify the kernel has CONFIG_TRIM_UNUSED_KSYMS DISABLED.
dnl #
AC_DEFUN([SPL_AC_CONFIG_TRIM_UNUSED_KSYMS], [
AC_MSG_CHECKING([whether CONFIG_TRIM_UNUSED_KSYM is disabled])
SPL_LINUX_TRY_COMPILE([
#if defined(CONFIG_TRIM_UNUSED_KSYMS)
#error CONFIG_TRIM_UNUSED_KSYMS not defined
#endif
],[ ],[
AC_MSG_RESULT([yes])
],[
AC_MSG_RESULT([no])
AC_MSG_ERROR([
*** This kernel has unused symbols trimming enabled, please disable.
*** Rebuild the kernel with CONFIG_TRIM_UNUSED_KSYMS=n set.])
])
])

19
config/kernel-truncate-range.m4 Normal file
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dnl #
dnl # 3.5 API change,
dnl # inode_operations.truncate_range removed
dnl #
AC_DEFUN([SPL_AC_INODE_TRUNCATE_RANGE], [
AC_MSG_CHECKING([whether truncate_range() inode operation is available])
SPL_LINUX_TRY_COMPILE([
#include <linux/fs.h>
],[
struct inode_operations ops;
ops.truncate_range = NULL;
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_INODE_TRUNCATE_RANGE, 1,
[truncate_range() inode operation is available])
],[
AC_MSG_RESULT(no)
])
])

21
config/kernel-urange-sleep.m4 Normal file
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@ -0,0 +1,21 @@
dnl #
dnl # 2.6.36 API compatibility.
dnl # Added usleep_range timer.
dnl # usleep_range is a finer precision implementation of msleep
dnl # designed to be a drop-in replacement for udelay where a precise
dnl # sleep / busy-wait is unnecessary.
dnl #
AC_DEFUN([SPL_AC_USLEEP_RANGE], [
AC_MSG_CHECKING([whether usleep_range() is available])
SPL_LINUX_TRY_COMPILE([
#include <linux/delay.h>
],[
usleep_range(0, 0);
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_USLEEP_RANGE, 1,
[usleep_range is available])
],[
AC_MSG_RESULT(no)
])
])

17
config/kernel-vfs-fsync.m4 Normal file
View File

@ -0,0 +1,17 @@
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/fs.h>
],[
vfs_fsync(NULL, 0);
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_2ARGS_VFS_FSYNC, 1, [vfs_fsync() wants 2 args])
],[
AC_MSG_RESULT(no)
])
])

62
config/kernel-vfs-getattr.m4 Normal file
View File

@ -0,0 +1,62 @@
dnl #
dnl # 4.11 API, a528d35e@torvalds/linux
dnl # vfs_getattr(const struct path *p, struct kstat *s, u32 m, unsigned int f)
dnl #
AC_DEFUN([SPL_AC_4ARGS_VFS_GETATTR], [
AC_MSG_CHECKING([whether vfs_getattr() wants 4 args])
SPL_LINUX_TRY_COMPILE([
#include <linux/fs.h>
],[
vfs_getattr((const struct path *)NULL,
(struct kstat *)NULL,
(u32)0,
(unsigned int)0);
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_4ARGS_VFS_GETATTR, 1,
[vfs_getattr wants 4 args])
],[
AC_MSG_RESULT(no)
])
])
dnl #
dnl # 3.9 API
dnl # vfs_getattr(struct path *p, struct kstat *s)
dnl #
AC_DEFUN([SPL_AC_2ARGS_VFS_GETATTR], [
AC_MSG_CHECKING([whether vfs_getattr() wants 2 args])
SPL_LINUX_TRY_COMPILE([
#include <linux/fs.h>
],[
vfs_getattr((struct path *) NULL,
(struct kstat *)NULL);
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_2ARGS_VFS_GETATTR, 1,
[vfs_getattr wants 2 args])
],[
AC_MSG_RESULT(no)
])
])
dnl #
dnl # <3.9 API
dnl # vfs_getattr(struct vfsmount *v, struct dentry *d, struct kstat *k)
dnl #
AC_DEFUN([SPL_AC_3ARGS_VFS_GETATTR], [
AC_MSG_CHECKING([whether vfs_getattr() wants 3 args])
SPL_LINUX_TRY_COMPILE([
#include <linux/fs.h>
],[
vfs_getattr((struct vfsmount *)NULL,
(struct dentry *)NULL,
(struct kstat *)NULL);
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_3ARGS_VFS_GETATTR, 1,
[vfs_getattr wants 3 args])
],[
AC_MSG_RESULT(no)
])
])

76
config/kernel-wait.m4 Normal file
View File

@ -0,0 +1,76 @@
dnl #
dnl # 3.17 API change,
dnl # wait_on_bit() no longer requires an action argument. The former
dnl # "wait_on_bit" interface required an 'action' function to be provided
dnl # which does the actual waiting. There were over 20 such functions in the
dnl # kernel, many of them identical, though most cases can be satisfied by one
dnl # of just two functions: one which uses io_schedule() and one which just
dnl # uses schedule(). This API change was made to consolidate all of those
dnl # redundant wait functions.
dnl #
AC_DEFUN([SPL_AC_WAIT_ON_BIT], [
AC_MSG_CHECKING([whether wait_on_bit() takes an action])
SPL_LINUX_TRY_COMPILE([
#include <linux/wait.h>
],[
int (*action)(void *) = NULL;
wait_on_bit(NULL, 0, action, 0);
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_WAIT_ON_BIT_ACTION, 1, [yes])
],[
AC_MSG_RESULT(no)
])
])
dnl #
dnl # 4.13 API change
dnl # Renamed struct wait_queue -> struct wait_queue_entry.
dnl #
AC_DEFUN([SPL_AC_WAIT_QUEUE_ENTRY_T], [
AC_MSG_CHECKING([whether wait_queue_entry_t exists])
SPL_LINUX_TRY_COMPILE([
#include <linux/wait.h>
],[
wait_queue_entry_t *entry __attribute__ ((unused));
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_WAIT_QUEUE_ENTRY_T, 1,
[wait_queue_entry_t exists])
],[
AC_MSG_RESULT(no)
])
])
dnl #
dnl # 4.13 API change
dnl # Renamed wait_queue_head::task_list -> wait_queue_head::head
dnl # Renamed wait_queue_entry::task_list -> wait_queue_entry::entry
dnl #
AC_DEFUN([SPL_AC_WAIT_QUEUE_HEAD_ENTRY], [
AC_MSG_CHECKING([whether wq_head->head and wq_entry->entry exist])
SPL_LINUX_TRY_COMPILE([
#include <linux/wait.h>
#ifdef HAVE_WAIT_QUEUE_ENTRY_T
typedef wait_queue_head_t spl_wait_queue_head_t;
typedef wait_queue_entry_t spl_wait_queue_entry_t;
#else
typedef wait_queue_head_t spl_wait_queue_head_t;
typedef wait_queue_t spl_wait_queue_entry_t;
#endif
],[
spl_wait_queue_head_t wq_head;
spl_wait_queue_entry_t wq_entry;
struct list_head *head __attribute__ ((unused));
struct list_head *entry __attribute__ ((unused));
head = &wq_head.head;
entry = &wq_entry.entry;
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_WAIT_QUEUE_HEAD_ENTRY, 1,
[wq_head->head and wq_entry->entry exist])
],[
AC_MSG_RESULT(no)
])
])

63
config/kernel-zlib.m4 Normal file
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@ -0,0 +1,63 @@
dnl #
dnl # zlib inflate compat,
dnl # Verify the kernel has CONFIG_ZLIB_INFLATE support enabled.
dnl #
AC_DEFUN([SPL_AC_CONFIG_ZLIB_INFLATE], [
AC_MSG_CHECKING([whether CONFIG_ZLIB_INFLATE is defined])
SPL_LINUX_TRY_COMPILE([
#if !defined(CONFIG_ZLIB_INFLATE) && \
!defined(CONFIG_ZLIB_INFLATE_MODULE)
#error CONFIG_ZLIB_INFLATE not defined
#endif
],[ ],[
AC_MSG_RESULT([yes])
],[
AC_MSG_RESULT([no])
AC_MSG_ERROR([
*** This kernel does not include the required zlib inflate support.
*** Rebuild the kernel with CONFIG_ZLIB_INFLATE=y|m set.])
])
])
dnl #
dnl # zlib deflate compat,
dnl # Verify the kernel has CONFIG_ZLIB_DEFLATE support enabled.
dnl #
AC_DEFUN([SPL_AC_CONFIG_ZLIB_DEFLATE], [
AC_MSG_CHECKING([whether CONFIG_ZLIB_DEFLATE is defined])
SPL_LINUX_TRY_COMPILE([
#if !defined(CONFIG_ZLIB_DEFLATE) && \
!defined(CONFIG_ZLIB_DEFLATE_MODULE)
#error CONFIG_ZLIB_DEFLATE not defined
#endif
],[ ],[
AC_MSG_RESULT([yes])
],[
AC_MSG_RESULT([no])
AC_MSG_ERROR([
*** This kernel does not include the required zlib deflate support.
*** Rebuild the kernel with CONFIG_ZLIB_DEFLATE=y|m set.])
])
])
dnl #
dnl # 2.6.39 API compat,
dnl # The function zlib_deflate_workspacesize() now take 2 arguments.
dnl # This was done to avoid always having to allocate the maximum size
dnl # workspace (268K). The caller can now specific the windowBits and
dnl # memLevel compression parameters to get a smaller workspace.
dnl #
AC_DEFUN([SPL_AC_2ARGS_ZLIB_DEFLATE_WORKSPACESIZE],
[AC_MSG_CHECKING([whether zlib_deflate_workspacesize() wants 2 args])
SPL_LINUX_TRY_COMPILE([
#include <linux/zlib.h>
],[
return zlib_deflate_workspacesize(MAX_WBITS, MAX_MEM_LEVEL);
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_2ARGS_ZLIB_DEFLATE_WORKSPACESIZE, 1,
[zlib_deflate_workspacesize() wants 2 args])
],[
AC_MSG_RESULT(no)
])
])

956
config/spl-build.m4
View File

@ -753,959 +753,3 @@ AC_DEFUN([SPL_AC_ATOMIC_SPINLOCK], [
AC_MSG_CHECKING([whether kernel defines atomic64_t]) AC_MSG_CHECKING([whether kernel defines atomic64_t])
AC_MSG_RESULT([$have_atomic64_t]) AC_MSG_RESULT([$have_atomic64_t])
]) ])
AC_DEFUN([SPL_AC_SHRINKER_CALLBACK],[
tmp_flags="$EXTRA_KCFLAGS"
EXTRA_KCFLAGS="-Werror"
dnl #
dnl # 2.6.23 to 2.6.34 API change
dnl # ->shrink(int nr_to_scan, gfp_t gfp_mask)
dnl #
AC_MSG_CHECKING([whether old 2-argument shrinker exists])
SPL_LINUX_TRY_COMPILE([
#include <linux/mm.h>
int shrinker_cb(int nr_to_scan, gfp_t gfp_mask);
],[
struct shrinker cache_shrinker = {
.shrink = shrinker_cb,
.seeks = DEFAULT_SEEKS,
};
register_shrinker(&cache_shrinker);
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_2ARGS_OLD_SHRINKER_CALLBACK, 1,
[old shrinker callback wants 2 args])
],[
AC_MSG_RESULT(no)
dnl #
dnl # 2.6.35 - 2.6.39 API change
dnl # ->shrink(struct shrinker *,
dnl # int nr_to_scan, gfp_t gfp_mask)
dnl #
AC_MSG_CHECKING([whether old 3-argument shrinker exists])
SPL_LINUX_TRY_COMPILE([
#include <linux/mm.h>
int shrinker_cb(struct shrinker *, int nr_to_scan,
gfp_t gfp_mask);
],[
struct shrinker cache_shrinker = {
.shrink = shrinker_cb,
.seeks = DEFAULT_SEEKS,
};
register_shrinker(&cache_shrinker);
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_3ARGS_SHRINKER_CALLBACK, 1,
[old shrinker callback wants 3 args])
],[
AC_MSG_RESULT(no)
dnl #
dnl # 3.0 - 3.11 API change
dnl # ->shrink(struct shrinker *,
dnl # struct shrink_control *sc)
dnl #
AC_MSG_CHECKING(
[whether new 2-argument shrinker exists])
SPL_LINUX_TRY_COMPILE([
#include <linux/mm.h>
int shrinker_cb(struct shrinker *,
struct shrink_control *sc);
],[
struct shrinker cache_shrinker = {
.shrink = shrinker_cb,
.seeks = DEFAULT_SEEKS,
};
register_shrinker(&cache_shrinker);
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_2ARGS_NEW_SHRINKER_CALLBACK, 1,
[new shrinker callback wants 2 args])
],[
AC_MSG_RESULT(no)
dnl #
dnl # 3.12 API change,
dnl # ->shrink() is logically split in to
dnl # ->count_objects() and ->scan_objects()
dnl #
AC_MSG_CHECKING(
[whether ->count_objects callback exists])
SPL_LINUX_TRY_COMPILE([
#include <linux/mm.h>
unsigned long shrinker_cb(
struct shrinker *,
struct shrink_control *sc);
],[
struct shrinker cache_shrinker = {
.count_objects = shrinker_cb,
.scan_objects = shrinker_cb,
.seeks = DEFAULT_SEEKS,
};
register_shrinker(&cache_shrinker);
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_SPLIT_SHRINKER_CALLBACK,
1, [->count_objects exists])
],[
AC_MSG_ERROR(error)
])
])
])
])
EXTRA_KCFLAGS="$tmp_flags"
])
dnl #
dnl # 2.6.33 API change,
dnl # Removed .ctl_name from struct ctl_table.
dnl #
AC_DEFUN([SPL_AC_CTL_NAME], [
AC_MSG_CHECKING([whether struct ctl_table has ctl_name])
SPL_LINUX_TRY_COMPILE([
#include <linux/sysctl.h>
],[
struct ctl_table ctl __attribute__ ((unused));
ctl.ctl_name = 0;
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_CTL_NAME, 1, [struct ctl_table has ctl_name])
],[
AC_MSG_RESULT(no)
])
])
dnl #
dnl # 3.10 API change,
dnl # PDE is replaced by PDE_DATA
dnl #
AC_DEFUN([SPL_AC_PDE_DATA], [
AC_MSG_CHECKING([whether PDE_DATA() is available])
SPL_LINUX_TRY_COMPILE_SYMBOL([
#include <linux/proc_fs.h>
], [
PDE_DATA(NULL);
], [PDE_DATA], [], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_PDE_DATA, 1, [yes])
],[
AC_MSG_RESULT(no)
])
])
dnl #
dnl # 3.9 API change
dnl # set_fs_pwd takes const struct path *
dnl #
AC_DEFUN([SPL_AC_SET_FS_PWD_WITH_CONST],
tmp_flags="$EXTRA_KCFLAGS"
EXTRA_KCFLAGS="-Werror"
[AC_MSG_CHECKING([whether set_fs_pwd() requires const struct path *])
SPL_LINUX_TRY_COMPILE([
#include <linux/spinlock.h>
#include <linux/fs_struct.h>
#include <linux/path.h>
void (*const set_fs_pwd_func)
(struct fs_struct *, const struct path *)
= set_fs_pwd;
],[
return 0;
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_SET_FS_PWD_WITH_CONST, 1,
[set_fs_pwd() needs const path *])
],[
SPL_LINUX_TRY_COMPILE([
#include <linux/spinlock.h>
#include <linux/fs_struct.h>
#include <linux/path.h>
void (*const set_fs_pwd_func)
(struct fs_struct *, struct path *)
= set_fs_pwd;
],[
return 0;
],[
AC_MSG_RESULT(no)
],[
AC_MSG_ERROR(unknown)
])
])
EXTRA_KCFLAGS="$tmp_flags"
])
dnl #
dnl # 2.6.36 API change,
dnl # The 'struct fs_struct->lock' was changed from a rwlock_t to
dnl # a spinlock_t to improve the fastpath performance.
dnl #
AC_DEFUN([SPL_AC_FS_STRUCT_SPINLOCK], [
AC_MSG_CHECKING([whether struct fs_struct uses spinlock_t])
tmp_flags="$EXTRA_KCFLAGS"
EXTRA_KCFLAGS="-Werror"
SPL_LINUX_TRY_COMPILE([
#include <linux/sched.h>
#include <linux/fs_struct.h>
],[
static struct fs_struct fs;
spin_lock_init(&fs.lock);
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_FS_STRUCT_SPINLOCK, 1,
[struct fs_struct uses spinlock_t])
],[
AC_MSG_RESULT(no)
])
EXTRA_KCFLAGS="$tmp_flags"
])
dnl #
dnl # User namespaces, use kuid_t in place of uid_t
dnl # where available. Not strictly a user namespaces thing
dnl # but it should prevent surprises
dnl #
AC_DEFUN([SPL_AC_KUIDGID_T], [
AC_MSG_CHECKING([whether kuid_t/kgid_t is available])
SPL_LINUX_TRY_COMPILE([
#include <linux/uidgid.h>
], [
kuid_t userid = KUIDT_INIT(0);
kgid_t groupid = KGIDT_INIT(0);
],[
SPL_LINUX_TRY_COMPILE([
#include <linux/uidgid.h>
], [
kuid_t userid = 0;
kgid_t groupid = 0;
],[
AC_MSG_RESULT(yes; optional)
],[
AC_MSG_RESULT(yes; mandatory)
AC_DEFINE(HAVE_KUIDGID_T, 1, [kuid_t/kgid_t in use])
])
],[
AC_MSG_RESULT(no)
])
])
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/fs.h>
],[
vfs_fsync(NULL, 0);
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_2ARGS_VFS_FSYNC, 1, [vfs_fsync() wants 2 args])
],[
AC_MSG_RESULT(no)
])
])
dnl #
dnl # 3.5 API change,
dnl # inode_operations.truncate_range removed
dnl #
AC_DEFUN([SPL_AC_INODE_TRUNCATE_RANGE], [
AC_MSG_CHECKING([whether truncate_range() inode operation is available])
SPL_LINUX_TRY_COMPILE([
#include <linux/fs.h>
],[
struct inode_operations ops;
ops.truncate_range = NULL;
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_INODE_TRUNCATE_RANGE, 1,
[truncate_range() inode operation is available])
],[
AC_MSG_RESULT(no)
])
])
dnl #
dnl # Linux 2.6.38 - 3.x API
dnl #
AC_DEFUN([SPL_AC_KERNEL_FILE_FALLOCATE], [
AC_MSG_CHECKING([whether fops->fallocate() exists])
SPL_LINUX_TRY_COMPILE([
#include <linux/fs.h>
],[
long (*fallocate) (struct file *, int, loff_t, loff_t) = NULL;
struct file_operations fops __attribute__ ((unused)) = {
.fallocate = fallocate,
};
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_FILE_FALLOCATE, 1, [fops->fallocate() exists])
],[
AC_MSG_RESULT(no)
])
])
dnl #
dnl # Linux 2.6.x - 2.6.37 API
dnl #
AC_DEFUN([SPL_AC_KERNEL_INODE_FALLOCATE], [
AC_MSG_CHECKING([whether iops->fallocate() exists])
SPL_LINUX_TRY_COMPILE([
#include <linux/fs.h>
],[
long (*fallocate) (struct inode *, int, loff_t, loff_t) = NULL;
struct inode_operations fops __attribute__ ((unused)) = {
.fallocate = fallocate,
};
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_INODE_FALLOCATE, 1, [fops->fallocate() exists])
],[
AC_MSG_RESULT(no)
])
])
dnl #
dnl # PaX Linux 2.6.38 - 3.x API
dnl #
AC_DEFUN([SPL_AC_PAX_KERNEL_FILE_FALLOCATE], [
AC_MSG_CHECKING([whether fops->fallocate() exists])
SPL_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.
dnl #
AC_DEFUN([SPL_AC_KERNEL_FALLOCATE], [
SPL_AC_KERNEL_FILE_FALLOCATE
SPL_AC_KERNEL_INODE_FALLOCATE
SPL_AC_PAX_KERNEL_FILE_FALLOCATE
])
dnl #
dnl # zlib inflate compat,
dnl # Verify the kernel has CONFIG_ZLIB_INFLATE support enabled.
dnl #
AC_DEFUN([SPL_AC_CONFIG_ZLIB_INFLATE], [
AC_MSG_CHECKING([whether CONFIG_ZLIB_INFLATE is defined])
SPL_LINUX_TRY_COMPILE([
#if !defined(CONFIG_ZLIB_INFLATE) && \
!defined(CONFIG_ZLIB_INFLATE_MODULE)
#error CONFIG_ZLIB_INFLATE not defined
#endif
],[ ],[
AC_MSG_RESULT([yes])
],[
AC_MSG_RESULT([no])
AC_MSG_ERROR([
*** This kernel does not include the required zlib inflate support.
*** Rebuild the kernel with CONFIG_ZLIB_INFLATE=y|m set.])
])
])
dnl #
dnl # zlib deflate compat,
dnl # Verify the kernel has CONFIG_ZLIB_DEFLATE support enabled.
dnl #
AC_DEFUN([SPL_AC_CONFIG_ZLIB_DEFLATE], [
AC_MSG_CHECKING([whether CONFIG_ZLIB_DEFLATE is defined])
SPL_LINUX_TRY_COMPILE([
#if !defined(CONFIG_ZLIB_DEFLATE) && \
!defined(CONFIG_ZLIB_DEFLATE_MODULE)
#error CONFIG_ZLIB_DEFLATE not defined
#endif
],[ ],[
AC_MSG_RESULT([yes])
],[
AC_MSG_RESULT([no])
AC_MSG_ERROR([
*** This kernel does not include the required zlib deflate support.
*** Rebuild the kernel with CONFIG_ZLIB_DEFLATE=y|m set.])
])
])
dnl #
dnl # config trim unused symbols,
dnl # Verify the kernel has CONFIG_TRIM_UNUSED_KSYMS DISABLED.
dnl #
AC_DEFUN([SPL_AC_CONFIG_TRIM_UNUSED_KSYMS], [
AC_MSG_CHECKING([whether CONFIG_TRIM_UNUSED_KSYM is disabled])
SPL_LINUX_TRY_COMPILE([
#if defined(CONFIG_TRIM_UNUSED_KSYMS)
#error CONFIG_TRIM_UNUSED_KSYMS not defined
#endif
],[ ],[
AC_MSG_RESULT([yes])
],[
AC_MSG_RESULT([no])
AC_MSG_ERROR([
*** This kernel has unused symbols trimming enabled, please disable.
*** Rebuild the kernel with CONFIG_TRIM_UNUSED_KSYMS=n set.])
])
])
dnl #
dnl # 2.6.39 API compat,
dnl # The function zlib_deflate_workspacesize() now take 2 arguments.
dnl # This was done to avoid always having to allocate the maximum size
dnl # workspace (268K). The caller can now specific the windowBits and
dnl # memLevel compression parameters to get a smaller workspace.
dnl #
AC_DEFUN([SPL_AC_2ARGS_ZLIB_DEFLATE_WORKSPACESIZE],
[AC_MSG_CHECKING([whether zlib_deflate_workspacesize() wants 2 args])
SPL_LINUX_TRY_COMPILE([
#include <linux/zlib.h>
],[
return zlib_deflate_workspacesize(MAX_WBITS, MAX_MEM_LEVEL);
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_2ARGS_ZLIB_DEFLATE_WORKSPACESIZE, 1,
[zlib_deflate_workspacesize() wants 2 args])
],[
AC_MSG_RESULT(no)
])
])
dnl #
dnl # 2.6.39 API change,
dnl # Shrinker adjust to use common shrink_control structure.
dnl #
AC_DEFUN([SPL_AC_SHRINK_CONTROL_STRUCT], [
AC_MSG_CHECKING([whether struct shrink_control exists])
SPL_LINUX_TRY_COMPILE([
#include <linux/mm.h>
],[
struct shrink_control sc __attribute__ ((unused));
sc.nr_to_scan = 0;
sc.gfp_mask = GFP_KERNEL;
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_SHRINK_CONTROL_STRUCT, 1,
[struct shrink_control exists])
],[
AC_MSG_RESULT(no)
])
])
dnl #
dnl # 3.1 API Change
dnl #
dnl # The rw_semaphore.wait_lock member was changed from spinlock_t to
dnl # raw_spinlock_t at commit ddb6c9b58a19edcfac93ac670b066c836ff729f1.
dnl #
AC_DEFUN([SPL_AC_RWSEM_SPINLOCK_IS_RAW], [
AC_MSG_CHECKING([whether struct rw_semaphore member wait_lock is raw])
tmp_flags="$EXTRA_KCFLAGS"
EXTRA_KCFLAGS="-Werror"
SPL_LINUX_TRY_COMPILE([
#include <linux/rwsem.h>
],[
struct rw_semaphore dummy_semaphore __attribute__ ((unused));
raw_spinlock_t dummy_lock __attribute__ ((unused)) =
__RAW_SPIN_LOCK_INITIALIZER(dummy_lock);
dummy_semaphore.wait_lock = dummy_lock;
],[
AC_MSG_RESULT(yes)
AC_DEFINE(RWSEM_SPINLOCK_IS_RAW, 1,
[struct rw_semaphore member wait_lock is raw_spinlock_t])
],[
AC_MSG_RESULT(no)
])
EXTRA_KCFLAGS="$tmp_flags"
])
dnl #
dnl # 3.16 API Change
dnl #
dnl # rwsem-spinlock "->activity" changed to "->count"
dnl #
AC_DEFUN([SPL_AC_RWSEM_ACTIVITY], [
AC_MSG_CHECKING([whether struct rw_semaphore has member activity])
tmp_flags="$EXTRA_KCFLAGS"
EXTRA_KCFLAGS="-Werror"
SPL_LINUX_TRY_COMPILE([
#include <linux/rwsem.h>
],[
struct rw_semaphore dummy_semaphore __attribute__ ((unused));
dummy_semaphore.activity = 0;
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_RWSEM_ACTIVITY, 1,
[struct rw_semaphore has member activity])
],[
AC_MSG_RESULT(no)
])
EXTRA_KCFLAGS="$tmp_flags"
])
dnl #
dnl # 4.8 API Change
dnl #
dnl # rwsem "->count" changed to atomic_long_t type
dnl #
AC_DEFUN([SPL_AC_RWSEM_ATOMIC_LONG_COUNT], [
AC_MSG_CHECKING(
[whether struct rw_semaphore has atomic_long_t member count])
tmp_flags="$EXTRA_KCFLAGS"
EXTRA_KCFLAGS="-Werror"
SPL_LINUX_TRY_COMPILE([
#include <linux/rwsem.h>
],[
DECLARE_RWSEM(dummy_semaphore);
(void) atomic_long_read(&dummy_semaphore.count);
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_RWSEM_ATOMIC_LONG_COUNT, 1,
[struct rw_semaphore has atomic_long_t member count])
],[
AC_MSG_RESULT(no)
])
EXTRA_KCFLAGS="$tmp_flags"
])
dnl #
dnl # 3.9 API change,
dnl # Moved things from linux/sched.h to linux/sched/rt.h
dnl #
AC_DEFUN([SPL_AC_SCHED_RT_HEADER],
[AC_MSG_CHECKING([whether header linux/sched/rt.h exists])
SPL_LINUX_TRY_COMPILE([
#include <linux/sched.h>
#include <linux/sched/rt.h>
],[
return 0;
],[
AC_DEFINE(HAVE_SCHED_RT_HEADER, 1, [linux/sched/rt.h exists])
AC_MSG_RESULT(yes)
],[
AC_MSG_RESULT(no)
])
])
dnl #
dnl # 4.11 API change,
dnl # Moved things from linux/sched.h to linux/sched/signal.h
dnl #
AC_DEFUN([SPL_AC_SCHED_SIGNAL_HEADER],
[AC_MSG_CHECKING([whether header linux/sched/signal.h exists])
SPL_LINUX_TRY_COMPILE([
#include <linux/sched.h>
#include <linux/sched/signal.h>
],[
return 0;
],[
AC_DEFINE(HAVE_SCHED_SIGNAL_HEADER, 1, [linux/sched/signal.h exists])
AC_MSG_RESULT(yes)
],[
AC_MSG_RESULT(no)
])
])
dnl #
dnl # 4.11 API, a528d35e@torvalds/linux
dnl # vfs_getattr(const struct path *p, struct kstat *s, u32 m, unsigned int f)
dnl #
AC_DEFUN([SPL_AC_4ARGS_VFS_GETATTR], [
AC_MSG_CHECKING([whether vfs_getattr() wants 4 args])
SPL_LINUX_TRY_COMPILE([
#include <linux/fs.h>
],[
vfs_getattr((const struct path *)NULL,
(struct kstat *)NULL,
(u32)0,
(unsigned int)0);
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_4ARGS_VFS_GETATTR, 1,
[vfs_getattr wants 4 args])
],[
AC_MSG_RESULT(no)
])
])
dnl #
dnl # 3.9 API
dnl # vfs_getattr(struct path *p, struct kstat *s)
dnl #
AC_DEFUN([SPL_AC_2ARGS_VFS_GETATTR], [
AC_MSG_CHECKING([whether vfs_getattr() wants 2 args])
SPL_LINUX_TRY_COMPILE([
#include <linux/fs.h>
],[
vfs_getattr((struct path *) NULL,
(struct kstat *)NULL);
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_2ARGS_VFS_GETATTR, 1,
[vfs_getattr wants 2 args])
],[
AC_MSG_RESULT(no)
])
])
dnl #
dnl # <3.9 API
dnl # vfs_getattr(struct vfsmount *v, struct dentry *d, struct kstat *k)
dnl #
AC_DEFUN([SPL_AC_3ARGS_VFS_GETATTR], [
AC_MSG_CHECKING([whether vfs_getattr() wants 3 args])
SPL_LINUX_TRY_COMPILE([
#include <linux/fs.h>
],[
vfs_getattr((struct vfsmount *)NULL,
(struct dentry *)NULL,
(struct kstat *)NULL);
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_3ARGS_VFS_GETATTR, 1,
[vfs_getattr wants 3 args])
],[
AC_MSG_RESULT(no)
])
])
dnl #
dnl # 2.6.36 API compatibility.
dnl # Added usleep_range timer.
dnl # usleep_range is a finer precision implementation of msleep
dnl # designed to be a drop-in replacement for udelay where a precise
dnl # sleep / busy-wait is unnecessary.
dnl #
AC_DEFUN([SPL_AC_USLEEP_RANGE], [
AC_MSG_CHECKING([whether usleep_range() is available])
SPL_LINUX_TRY_COMPILE([
#include <linux/delay.h>
],[
usleep_range(0, 0);
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_USLEEP_RANGE, 1,
[usleep_range is available])
],[
AC_MSG_RESULT(no)
])
])
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([SPL_AC_KMEM_CACHE_ALLOCFLAGS], [
AC_MSG_CHECKING([whether struct kmem_cache has allocflags])
SPL_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])
SPL_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 # 3.17 API change,
dnl # wait_on_bit() no longer requires an action argument. The former
dnl # "wait_on_bit" interface required an 'action' function to be provided
dnl # which does the actual waiting. There were over 20 such functions in the
dnl # kernel, many of them identical, though most cases can be satisfied by one
dnl # of just two functions: one which uses io_schedule() and one which just
dnl # uses schedule(). This API change was made to consolidate all of those
dnl # redundant wait functions.
dnl #
AC_DEFUN([SPL_AC_WAIT_ON_BIT], [
AC_MSG_CHECKING([whether wait_on_bit() takes an action])
SPL_LINUX_TRY_COMPILE([
#include <linux/wait.h>
],[
int (*action)(void *) = NULL;
wait_on_bit(NULL, 0, action, 0);
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_WAIT_ON_BIT_ACTION, 1, [yes])
],[
AC_MSG_RESULT(no)
])
])
dnl #
dnl # 4.7 API change
dnl # i_mutex is changed to i_rwsem. Instead of directly using
dnl # i_mutex/i_rwsem, we should use inode_lock() and inode_lock_shared()
dnl # We test inode_lock_shared because inode_lock is introduced earlier.
dnl #
AC_DEFUN([SPL_AC_INODE_LOCK], [
AC_MSG_CHECKING([whether inode_lock_shared() exists])
tmp_flags="$EXTRA_KCFLAGS"
EXTRA_KCFLAGS="-Werror"
SPL_LINUX_TRY_COMPILE([
#include <linux/fs.h>
],[
struct inode *inode = NULL;
inode_lock_shared(inode);
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_INODE_LOCK_SHARED, 1, [yes])
],[
AC_MSG_RESULT(no)
])
EXTRA_KCFLAGS="$tmp_flags"
])
dnl #
dnl # 4.9 API change
dnl # group_info changed from 2d array via >blocks to 1d array via ->gid
dnl #
AC_DEFUN([SPL_AC_GROUP_INFO_GID], [
AC_MSG_CHECKING([whether group_info->gid exists])
tmp_flags="$EXTRA_KCFLAGS"
EXTRA_KCFLAGS="-Werror"
SPL_LINUX_TRY_COMPILE([
#include <linux/cred.h>
],[
struct group_info *gi = groups_alloc(1);
gi->gid[0] = KGIDT_INIT(0);
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_GROUP_INFO_GID, 1, [group_info->gid exists])
],[
AC_MSG_RESULT(no)
])
EXTRA_KCFLAGS="$tmp_flags"
])
dnl #
dnl # grsecurity API change,
dnl # kmem_cache_create() with SLAB_USERCOPY flag replaced by
dnl # kmem_cache_create_usercopy().
dnl #
AC_DEFUN([SPL_AC_KMEM_CACHE_CREATE_USERCOPY], [
AC_MSG_CHECKING([whether kmem_cache_create_usercopy() exists])
tmp_flags="$EXTRA_KCFLAGS"
EXTRA_KCFLAGS="-Werror"
SPL_LINUX_TRY_COMPILE([
#include <linux/slab.h>
static void ctor(void *foo)
{
// fake ctor
}
],[
struct kmem_cache *skc_linux_cache;
const char *name = "test";
size_t size = 4096;
size_t align = 8;
unsigned long flags = 0;
size_t useroffset = 0;
size_t usersize = size - useroffset;
skc_linux_cache = kmem_cache_create_usercopy(
name, size, align, flags, useroffset, usersize, ctor);
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_KMEM_CACHE_CREATE_USERCOPY, 1,
[kmem_cache_create_usercopy() exists])
],[
AC_MSG_RESULT(no)
])
EXTRA_KCFLAGS="$tmp_flags"
])
dnl #
dnl # 4.13 API change
dnl # Renamed struct wait_queue -> struct wait_queue_entry.
dnl #
AC_DEFUN([SPL_AC_WAIT_QUEUE_ENTRY_T], [
AC_MSG_CHECKING([whether wait_queue_entry_t exists])
SPL_LINUX_TRY_COMPILE([
#include <linux/wait.h>
],[
wait_queue_entry_t *entry __attribute__ ((unused));
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_WAIT_QUEUE_ENTRY_T, 1,
[wait_queue_entry_t exists])
],[
AC_MSG_RESULT(no)
])
])
dnl #
dnl # 4.13 API change
dnl # Renamed wait_queue_head::task_list -> wait_queue_head::head
dnl # Renamed wait_queue_entry::task_list -> wait_queue_entry::entry
dnl #
AC_DEFUN([SPL_AC_WAIT_QUEUE_HEAD_ENTRY], [
AC_MSG_CHECKING([whether wq_head->head and wq_entry->entry exist])
SPL_LINUX_TRY_COMPILE([
#include <linux/wait.h>
#ifdef HAVE_WAIT_QUEUE_ENTRY_T
typedef wait_queue_head_t spl_wait_queue_head_t;
typedef wait_queue_entry_t spl_wait_queue_entry_t;
#else
typedef wait_queue_head_t spl_wait_queue_head_t;
typedef wait_queue_t spl_wait_queue_entry_t;
#endif
],[
spl_wait_queue_head_t wq_head;
spl_wait_queue_entry_t wq_entry;
struct list_head *head __attribute__ ((unused));
struct list_head *entry __attribute__ ((unused));
head = &wq_head.head;
entry = &wq_entry.entry;
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_WAIT_QUEUE_HEAD_ENTRY, 1,
[wq_head->head and wq_entry->entry exist])
],[
AC_MSG_RESULT(no)
])
])
dnl #
dnl # 3.19 API change
dnl # The io_schedule_timeout() function is present in all 2.6.32 kernels
dnl # but it was not exported until Linux 3.19. The RHEL 7.x kernels which
dnl # are based on a 3.10 kernel do export this symbol.
dnl #
AC_DEFUN([SPL_AC_IO_SCHEDULE_TIMEOUT], [
AC_MSG_CHECKING([whether io_schedule_timeout() is available])
SPL_LINUX_TRY_COMPILE_SYMBOL([
#include <linux/sched.h>
], [
(void) io_schedule_timeout(1);
], [io_schedule_timeout], [], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_IO_SCHEDULE_TIMEOUT, 1, [yes])
],[
AC_MSG_RESULT(no)
])
])
dnl #
dnl # 4.14 API change
dnl # kernel_write() which was introduced in 3.9 was updated to take
dnl # the offset as a pointer which is needed by vn_rdwr().
dnl #
AC_DEFUN([SPL_AC_KERNEL_WRITE], [
AC_MSG_CHECKING([whether kernel_write() takes loff_t pointer])
tmp_flags="$EXTRA_KCFLAGS"
EXTRA_KCFLAGS="-Werror"
SPL_LINUX_TRY_COMPILE([
#include <linux/fs.h>
],[
struct file *file = NULL;
const void *buf = NULL;
size_t count = 0;
loff_t *pos = NULL;
ssize_t ret;
ret = kernel_write(file, buf, count, pos);
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_KERNEL_WRITE_PPOS, 1,
[kernel_write() take loff_t pointer])
],[
AC_MSG_RESULT(no)
])
EXTRA_KCFLAGS="$tmp_flags"
])
dnl #
dnl # 4.14 API change
dnl # kernel_read() which has existed for forever was updated to take
dnl # the offset as a pointer which is needed by vn_rdwr().
dnl #
AC_DEFUN([SPL_AC_KERNEL_READ], [
AC_MSG_CHECKING([whether kernel_read() takes loff_t pointer])
tmp_flags="$EXTRA_KCFLAGS"
EXTRA_KCFLAGS="-Werror"
SPL_LINUX_TRY_COMPILE([
#include <linux/fs.h>
],[
struct file *file = NULL;
void *buf = NULL;
size_t count = 0;
loff_t *pos = NULL;
ssize_t ret;
ret = kernel_read(file, buf, count, pos);
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_KERNEL_READ_PPOS, 1,
[kernel_read() take loff_t pointer])
],[
AC_MSG_RESULT(no)
])
EXTRA_KCFLAGS="$tmp_flags"
])
dnl #
dnl # 4.15 API change
dnl # https://lkml.org/lkml/2017/11/25/90
dnl # Check if timer_list.func get passed a timer_list or an unsigned long
dnl # (older kernels). Also sanity check the from_timer() and timer_setup()
dnl # macros are available as well, since they will be used in the same newer
dnl # kernels that support the new timer_list.func signature.
dnl #
AC_DEFUN([SPL_AC_KERNEL_TIMER_FUNCTION_TIMER_LIST], [
AC_MSG_CHECKING([whether timer_list.function gets a timer_list])
tmp_flags="$EXTRA_KCFLAGS"
EXTRA_KCFLAGS="-Werror"
SPL_LINUX_TRY_COMPILE([
#include <linux/timer.h>
void task_expire(struct timer_list *tl) {}
],[
#ifndef from_timer
#error "No from_timer() macro"
#endif
struct timer_list timer;
timer.function = task_expire;
timer_setup(&timer, NULL, 0);
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_KERNEL_TIMER_FUNCTION_TIMER_LIST, 1,
[timer_list.function gets a timer_list])
],[
AC_MSG_RESULT(no)
])
EXTRA_KCFLAGS="$tmp_flags"
])