AC_MSG_CHECKING([whether kernel defines 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"
-])
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