261 lines
7.2 KiB
Plaintext
261 lines
7.2 KiB
Plaintext
dnl #
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dnl # 3.1 API change
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dnl # The super_block structure now stores a per-filesystem shrinker.
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dnl # This interface is preferable because it can be used to specifically
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dnl # target only the zfs filesystem for pruning.
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dnl #
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AC_DEFUN([ZFS_AC_KERNEL_SRC_SUPER_BLOCK_S_SHRINK], [
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ZFS_LINUX_TEST_SRC([super_block_s_shrink], [
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#include <linux/fs.h>
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static const struct super_block
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sb __attribute__ ((unused)) = {
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.s_shrink.seeks = DEFAULT_SEEKS,
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.s_shrink.batch = 0,
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};
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],[])
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])
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dnl #
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dnl # 6.7 API change
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dnl # s_shrink is now a pointer.
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dnl #
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AC_DEFUN([ZFS_AC_KERNEL_SRC_SUPER_BLOCK_S_SHRINK_PTR], [
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ZFS_LINUX_TEST_SRC([super_block_s_shrink_ptr], [
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#include <linux/fs.h>
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static unsigned long shrinker_cb(struct shrinker *shrink,
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struct shrink_control *sc) { return 0; }
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static struct shrinker shrinker = {
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.count_objects = shrinker_cb,
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.scan_objects = shrinker_cb,
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.seeks = DEFAULT_SEEKS,
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};
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static const struct super_block
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sb __attribute__ ((unused)) = {
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.s_shrink = &shrinker,
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};
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],[])
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])
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AC_DEFUN([ZFS_AC_KERNEL_SUPER_BLOCK_S_SHRINK], [
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AC_MSG_CHECKING([whether super_block has s_shrink])
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ZFS_LINUX_TEST_RESULT([super_block_s_shrink], [
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AC_MSG_RESULT(yes)
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AC_DEFINE(HAVE_SUPER_BLOCK_S_SHRINK, 1,
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[have super_block s_shrink])
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],[
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AC_MSG_RESULT(no)
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AC_MSG_CHECKING([whether super_block has s_shrink pointer])
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ZFS_LINUX_TEST_RESULT([super_block_s_shrink_ptr], [
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AC_MSG_RESULT(yes)
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AC_DEFINE(HAVE_SUPER_BLOCK_S_SHRINK_PTR, 1,
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[have super_block s_shrink pointer])
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],[
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AC_MSG_RESULT(no)
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ZFS_LINUX_TEST_ERROR([sb->s_shrink()])
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])
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])
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])
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dnl #
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dnl # 3.12 API change
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dnl # The nid member was added to struct shrink_control to support
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dnl # NUMA-aware shrinkers.
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dnl #
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AC_DEFUN([ZFS_AC_KERNEL_SRC_SHRINK_CONTROL_HAS_NID], [
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ZFS_LINUX_TEST_SRC([shrink_control_nid], [
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#include <linux/fs.h>
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],[
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struct shrink_control sc __attribute__ ((unused));
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unsigned long scnidsize __attribute__ ((unused)) =
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sizeof(sc.nid);
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])
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])
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AC_DEFUN([ZFS_AC_KERNEL_SHRINK_CONTROL_HAS_NID], [
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AC_MSG_CHECKING([whether shrink_control has nid])
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ZFS_LINUX_TEST_RESULT([shrink_control_nid], [
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AC_MSG_RESULT(yes)
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AC_DEFINE(SHRINK_CONTROL_HAS_NID, 1,
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[struct shrink_control has nid])
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],[
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AC_MSG_RESULT(no)
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])
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])
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AC_DEFUN([ZFS_AC_KERNEL_SRC_REGISTER_SHRINKER_VARARG], [
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ZFS_LINUX_TEST_SRC([register_shrinker_vararg], [
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#include <linux/mm.h>
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static unsigned long shrinker_cb(struct shrinker *shrink,
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struct shrink_control *sc) { return 0; }
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],[
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struct shrinker cache_shrinker = {
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.count_objects = shrinker_cb,
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.scan_objects = shrinker_cb,
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.seeks = DEFAULT_SEEKS,
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};
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register_shrinker(&cache_shrinker, "vararg-reg-shrink-test");
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])
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])
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AC_DEFUN([ZFS_AC_KERNEL_SRC_SHRINKER_CALLBACK], [
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ZFS_LINUX_TEST_SRC([shrinker_cb_shrink_control], [
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#include <linux/mm.h>
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static int shrinker_cb(struct shrinker *shrink,
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struct shrink_control *sc) { return 0; }
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],[
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struct shrinker cache_shrinker = {
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.shrink = shrinker_cb,
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.seeks = DEFAULT_SEEKS,
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};
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register_shrinker(&cache_shrinker);
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])
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ZFS_LINUX_TEST_SRC([shrinker_cb_shrink_control_split], [
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#include <linux/mm.h>
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static unsigned long shrinker_cb(struct shrinker *shrink,
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struct shrink_control *sc) { return 0; }
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],[
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struct shrinker cache_shrinker = {
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.count_objects = shrinker_cb,
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.scan_objects = shrinker_cb,
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.seeks = DEFAULT_SEEKS,
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};
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register_shrinker(&cache_shrinker);
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])
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])
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dnl #
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dnl # 6.7 API change
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dnl # register_shrinker has been replaced by shrinker_register.
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dnl #
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AC_DEFUN([ZFS_AC_KERNEL_SRC_SHRINKER_REGISTER], [
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ZFS_LINUX_TEST_SRC([shrinker_register], [
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#include <linux/shrinker.h>
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static unsigned long shrinker_cb(struct shrinker *shrink,
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struct shrink_control *sc) { return 0; }
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],[
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struct shrinker cache_shrinker = {
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.count_objects = shrinker_cb,
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.scan_objects = shrinker_cb,
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.seeks = DEFAULT_SEEKS,
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};
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shrinker_register(&cache_shrinker);
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])
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])
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AC_DEFUN([ZFS_AC_KERNEL_SHRINKER_CALLBACK],[
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dnl #
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dnl # 6.0 API change
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dnl # register_shrinker() becomes a var-arg function that takes
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dnl # a printf-style format string as args > 0
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dnl #
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AC_MSG_CHECKING([whether new var-arg register_shrinker() exists])
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ZFS_LINUX_TEST_RESULT([register_shrinker_vararg], [
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AC_MSG_RESULT(yes)
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AC_DEFINE(HAVE_REGISTER_SHRINKER_VARARG, 1,
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[register_shrinker is vararg])
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dnl # We assume that the split shrinker callback exists if the
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dnl # vararg register_shrinker() exists, because the latter is
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dnl # a much more recent addition, and the macro test for the
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dnl # var-arg version only works if the callback is split
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AC_DEFINE(HAVE_SPLIT_SHRINKER_CALLBACK, 1,
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[cs->count_objects exists])
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],[
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AC_MSG_RESULT(no)
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dnl #
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dnl # 3.0 - 3.11 API change
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dnl # cs->shrink(struct shrinker *, struct shrink_control *sc)
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dnl #
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AC_MSG_CHECKING([whether new 2-argument shrinker exists])
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ZFS_LINUX_TEST_RESULT([shrinker_cb_shrink_control], [
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AC_MSG_RESULT(yes)
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AC_DEFINE(HAVE_SINGLE_SHRINKER_CALLBACK, 1,
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[new shrinker callback wants 2 args])
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],[
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AC_MSG_RESULT(no)
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dnl #
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dnl # 3.12 API change,
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dnl # cs->shrink() is logically split in to
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dnl # cs->count_objects() and cs->scan_objects()
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dnl #
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AC_MSG_CHECKING(
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[whether cs->count_objects callback exists])
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ZFS_LINUX_TEST_RESULT(
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[shrinker_cb_shrink_control_split],[
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AC_MSG_RESULT(yes)
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AC_DEFINE(HAVE_SPLIT_SHRINKER_CALLBACK, 1,
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[cs->count_objects exists])
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],[
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AC_MSG_RESULT(no)
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AC_MSG_CHECKING(
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[whether shrinker_register exists])
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ZFS_LINUX_TEST_RESULT([shrinker_register], [
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AC_MSG_RESULT(yes)
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AC_DEFINE(HAVE_SHRINKER_REGISTER, 1,
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[shrinker_register exists])
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dnl # We assume that the split shrinker
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dnl # callback exists if
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dnl # shrinker_register() exists,
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dnl # because the latter is a much more
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dnl # recent addition, and the macro
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dnl # test for shrinker_register() only
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dnl # works if the callback is split
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AC_DEFINE(HAVE_SPLIT_SHRINKER_CALLBACK,
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1, [cs->count_objects exists])
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],[
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AC_MSG_RESULT(no)
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ZFS_LINUX_TEST_ERROR([shrinker])
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])
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])
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])
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])
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])
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dnl #
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dnl # 2.6.39 API change,
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dnl # Shrinker adjust to use common shrink_control structure.
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dnl #
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AC_DEFUN([ZFS_AC_KERNEL_SRC_SHRINK_CONTROL_STRUCT], [
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ZFS_LINUX_TEST_SRC([shrink_control_struct], [
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#include <linux/mm.h>
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],[
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struct shrink_control sc __attribute__ ((unused));
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sc.nr_to_scan = 0;
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sc.gfp_mask = GFP_KERNEL;
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])
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])
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AC_DEFUN([ZFS_AC_KERNEL_SHRINK_CONTROL_STRUCT], [
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AC_MSG_CHECKING([whether struct shrink_control exists])
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ZFS_LINUX_TEST_RESULT([shrink_control_struct], [
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AC_MSG_RESULT(yes)
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AC_DEFINE(HAVE_SHRINK_CONTROL_STRUCT, 1,
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[struct shrink_control exists])
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],[
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ZFS_LINUX_TEST_ERROR([shrink_control])
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])
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])
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AC_DEFUN([ZFS_AC_KERNEL_SRC_SHRINKER], [
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ZFS_AC_KERNEL_SRC_SUPER_BLOCK_S_SHRINK
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ZFS_AC_KERNEL_SRC_SUPER_BLOCK_S_SHRINK_PTR
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ZFS_AC_KERNEL_SRC_SHRINK_CONTROL_HAS_NID
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ZFS_AC_KERNEL_SRC_SHRINKER_CALLBACK
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ZFS_AC_KERNEL_SRC_SHRINK_CONTROL_STRUCT
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ZFS_AC_KERNEL_SRC_REGISTER_SHRINKER_VARARG
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ZFS_AC_KERNEL_SRC_SHRINKER_REGISTER
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])
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AC_DEFUN([ZFS_AC_KERNEL_SHRINKER], [
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ZFS_AC_KERNEL_SUPER_BLOCK_S_SHRINK
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ZFS_AC_KERNEL_SHRINK_CONTROL_HAS_NID
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ZFS_AC_KERNEL_SHRINKER_CALLBACK
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ZFS_AC_KERNEL_SHRINK_CONTROL_STRUCT
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])
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