]) # LIBCFS_SYSCTL_CTLNAME
#
+# LIBCFS_MODULE_LOCKING
+#
+# 2.6.36 introduced locking to module params. RHEL6 lacks this support
+#
+AC_DEFUN([LIBCFS_MODULE_LOCKING],[
+LB_CHECK_COMPILE([does the kernel support module param locking],
+module_param_locking, [
+ #include <linux/moduleparam.h>
+],[
+ __kernel_param_lock(NULL);
+ __kernel_param_unlock(NULL);
+],[
+ AC_DEFINE(HAVE_MODULE_PARAM_LOCKING, 1,
+ [locking module param is supported])
+])
+]) # LIBCFS_MODULE_LOCKING
+
+#
# LIBCFS_KSTRTOUL
#
# 2.6.38 kstrtoul is added
]) # LIBCFS_I_UID_READ
#
-# LIBCFS_SOCK_ALLOC_FILE
-#
-# FC18 3.7.2-201 unexport sock_map_fd() change to
-# use sock_alloc_file().
-# upstream commit 56b31d1c9f1e6a3ad92e7bfe252721e05d92b285
-#
-AC_DEFUN([LIBCFS_SOCK_ALLOC_FILE], [
-LB_CHECK_EXPORT([sock_alloc_file], [net/socket.c], [
- LB_CHECK_COMPILE([if 'sock_alloc_file' takes 3 arguments],
- sock_alloc_file_3args, [
- #include <linux/net.h>
- ],[
- sock_alloc_file(NULL, 0, NULL);
- ],[
- AC_DEFINE(HAVE_SOCK_ALLOC_FILE_3ARGS, 1,
- [sock_alloc_file takes 3 arguments])
- ],[
- AC_DEFINE(HAVE_SOCK_ALLOC_FILE, 1,
- [sock_alloc_file is exported])
- ])
-])
-]) # LIBCFS_SOCK_ALLOC_FILE
-
-#
# LIBCFS_HAVE_CRC32
#
AC_DEFUN([LIBCFS_HAVE_CRC32], [
AC_DEFUN([LIBCFS_KTIME_GET_TS64],[
LB_CHECK_COMPILE([does function 'ktime_get_ts64' exist],
ktime_get_ts64, [
+ #include <linux/hrtimer.h>
#include <linux/ktime.h>
],[
struct timespec64 *ts = NULL;
]) # LIBCFS_KTIME_GET_TS64
#
+# Linux kernel 3.12 introduced struct kernel_param_ops
+# This has been backported to all lustre supported
+# clients except RHEL6. We have to handle the differences.
+#
+AC_DEFUN([LIBCFS_KERNEL_PARAM_OPS],[
+LB_CHECK_COMPILE([does 'struct kernel_param_ops' exist],
+kernel_param_ops, [
+ #include <linux/module.h>
+],[
+ struct kernel_param_ops ops;
+
+ ops.set = NULL;
+],[
+ AC_DEFINE(HAVE_KERNEL_PARAM_OPS, 1,
+ ['struct kernel_param_ops' is available])
+])
+]) # LIBCFS_KERNEL_PARAM_OPS
+
+#
# Kernel version 3.12 introduced ktime_add
#
AC_DEFUN([LIBCFS_KTIME_ADD],[
LB_CHECK_COMPILE([does function 'ktime_add' exist],
ktime_add, [
+ #include <linux/hrtimer.h>
#include <linux/ktime.h>
],[
ktime_t start = ktime_set(0, 0);
AC_DEFUN([LIBCFS_KTIME_AFTER],[
LB_CHECK_COMPILE([does function 'ktime_after' exist],
ktime_after, [
+ #include <linux/hrtimer.h>
#include <linux/ktime.h>
],[
ktime_t start = ktime_set(0, 0);
]) # LIBCFS_KTIME_AFTER
#
+# Kernel version 3.12 introduced ktime_before
+# See linux commit 67cb9366ff5f99868100198efba5ca88aaa6ad25
+#
+AC_DEFUN([LIBCFS_KTIME_BEFORE],[
+LB_CHECK_COMPILE([does function 'ktime_before' exist],
+ktime_before, [
+ #include <linux/hrtimer.h>
+ #include <linux/ktime.h>
+],[
+ ktime_t start = ktime_set(0, 0);
+ ktime_t end = start;
+
+ ktime_before(start, end);
+],[
+ AC_DEFINE(HAVE_KTIME_BEFORE, 1,
+ [ktime_before is available])
+])
+]) # LIBCFS_KTIME_BEFORE
+
+#
+# Kernel version 3.12 introduced ktime_compare
+#
+AC_DEFUN([LIBCFS_KTIME_COMPARE],[
+LB_CHECK_COMPILE([does function 'ktime_compare' exist],
+ktime_compare, [
+ #include <linux/hrtimer.h>
+ #include <linux/ktime.h>
+],[
+ ktime_t start = ktime_set(0, 0);
+ ktime_t end = start;
+
+ ktime_compare(start, end);
+],[
+ AC_DEFINE(HAVE_KTIME_COMPARE, 1,
+ [ktime_compare is available])
+])
+]) # LIBCFS_KTIME_COMPARE
+
+#
# FC19 3.12 kernel struct shrinker change
#
AC_DEFUN([LIBCFS_SHRINKER_COUNT],[
#include <linux/mmzone.h>
#include <linux/shrinker.h>
],[
- ((struct shrinker*)0)->count_objects(NULL, NULL);
+ struct shrinker shrinker;
+
+ shrinker.count_objects = NULL;
],[
AC_DEFINE(HAVE_SHRINKER_COUNT, 1,
[shrinker has count_objects member])
AC_DEFUN([LIBCFS_KTIME_GET_REAL_SECONDS],[
LB_CHECK_COMPILE([does function 'ktime_get_real_seconds' exist],
ktime_get_real_seconds, [
+ #include <linux/hrtimer.h>
#include <linux/ktime.h>
],[
time64_t now;
]) # LIBCFS_KTIME_GET_REAL_SECONDS
#
+# Kernel version 3.17 created ktime_get_ns wrapper
+#
+AC_DEFUN([LIBCFS_KTIME_GET_NS],[
+LB_CHECK_COMPILE([does function 'ktime_get_ns' exist],
+ktime_get_ns, [
+ #include <linux/hrtimer.h>
+ #include <linux/ktime.h>
+],[
+ u64 nanoseconds;
+
+ nanoseconds = ktime_get_ns();
+],[],[
+ AC_DEFINE(NEED_KTIME_GET_NS, 1,
+ ['ktime_get_ns' is not available])
+])
+]) # LIBCFS_KTIME_GET_NS
+
+#
# Kernel version 3.17 created ktime_get_real_ns wrapper
#
AC_DEFUN([LIBCFS_KTIME_GET_REAL_NS],[
LB_CHECK_COMPILE([does function 'ktime_get_real_ns' exist],
ktime_get_real_ns, [
+ #include <linux/hrtimer.h>
#include <linux/ktime.h>
],[
u64 nanoseconds;
AC_DEFUN([LIBCFS_KTIME_TO_TIMESPEC64],[
LB_CHECK_COMPILE([does function 'ktime_to_timespec64' exist],
ktime_to_timespec64, [
+ #include <linux/hrtimer.h>
#include <linux/ktime.h>
],[
+ ktime_t now = ktime_set(0, 0);
struct timespec64 ts;
- ktime_t now;
ts = ktime_to_timespec64(now);
],[
timespec64_sub, [
#include <linux/time.h>
],[
- struct timespec64 later,earlier,diff;
+ struct timespec64 later = { }, earlier = { }, diff;
diff = timespec64_sub(later, earlier);
],[
]) # LIBCFS_HAVE_CPUMASK_PRINT_TO_PAGEBUF
#
+# Kernel version 4.0 commit 41fbf3b39d5eca01527338b4d0ee15ee1ae1023c
+# introduced the helper function ktime_ms_delta.
+#
+AC_DEFUN([LIBCFS_KTIME_MS_DELTA],[
+LB_CHECK_COMPILE([does function 'ktime_ms_delta' exist],
+ktime_ms_delta, [
+ #include <linux/ktime.h>
+],[
+ ktime_t start = ktime_set(0, 0);
+ ktime_t end = start;
+
+ ktime_ms_delta(start, end);
+],[
+ AC_DEFINE(HAVE_KTIME_MS_DELTA, 1,
+ ['ktime_ms_delta' is available])
+])
+]) # LIBCFS_KTIME_MS_DELTA
+
+#
+# Kernel version 4.1 commit b51d23e4e9fea6f264d39535c2a62d1f51e7ccc3
+# create per module locks which added kernel_param_[un]lock(). Older
+# kernels you have to use __kernel_param_[un]lock(). In that case its
+# a global lock for all modules but that is okay since its a rare event.
+#
+AC_DEFUN([LIBCFS_KERNEL_PARAM_LOCK],[
+LB_CHECK_COMPILE([does function 'kernel_param_[un]lock' exist],
+kernel_param_lock, [
+ #include <linux/moduleparam.h>
+],[
+ kernel_param_lock(NULL);
+ kernel_param_unlock(NULL);
+],[
+ AC_DEFINE(HAVE_KERNEL_PARAM_LOCK, 1,
+ ['kernel_param_[un]lock' is available])
+])
+]) # LIBCFS_KERNEL_PARAM_LOCK
+
+#
# Kernel version 4.2 changed topology_thread_cpumask
# to topology_sibling_cpumask
#
]) # LIBCFS_FPU_API
#
+# Kernel version 4.4 commit ef951599074ba4fad2d0efa0a977129b41e6d203
+# introduced kstrtobool and kstrtobool_from_user.
+#
+AC_DEFUN([LIBCFS_KSTRTOBOOL_FROM_USER], [
+LB_CHECK_COMPILE([if Linux kernel has 'kstrtobool_from_user'],
+kstrtobool_from_user, [
+ #include <linux/kernel.h>
+],[
+ bool result;
+ return kstrtobool_from_user(NULL, 0, &result);
+],[
+ AC_DEFINE(HAVE_KSTRTOBOOL_FROM_USER, 1,
+ [kernel has kstrtobool_from_user])
+])
+]) # LIBCFS_KSTRTOBOOL_FROM_USER
+
+#
# Kernel version 4.5-rc1 commit d12481bc58fba89427565f8592e88446ec084a24
# added crypto hash helpers
#
]) # LIBCFS_CRYPTO_HASH_HELPERS
#
+# Kernerl version 4.5-rc3 commit 2fe829aca9d7bed5fd6b49c6a1452e5e486b6cc3dd
+# made kset_find_obj() exportable to modules
+#
+AC_DEFUN([LIBCFS_EXPORT_KSET_FIND_OBJ], [
+LB_CHECK_EXPORT([kset_find_obj], [lib/kobject.c],
+ [AC_DEFINE(HAVE_KSET_FIND_OBJ, 1,
+ [kset_find_obj is exported by the kernel])])
+]) # LIBCFS_EXPORT_KSET_FIND_OBJ
+
+#
# LIBCFS_STACKTRACE_OPS_ADDRESS_RETURN_INT
#
# linux 4.6 kernel changed stacktrace_ops address to return an int
]) # LIBCFS_GET_USER_PAGES_GUP_FLAGS
#
+# Kernel version 4.10 commit 7b737965b33188bd3dbb44e938535c4006d97fbb
+# libcfs: Convert to hotplug state machine
+#
+AC_DEFUN([LIBCFS_HOTPLUG_STATE_MACHINE], [
+LB_CHECK_COMPILE([if libcfs supports CPU hotplug state machine],
+cpu_hotplug_state_machine, [
+ #include <linux/cpuhotplug.h>
+],[
+ cpuhp_remove_state(CPUHP_LUSTRE_CFS_DEAD);
+],[
+ AC_DEFINE(HAVE_HOTPLUG_STATE_MACHINE, 1,
+ [hotplug state machine is supported])
+])
+]) # LIBCFS_HOTPLUG_STATE_MACHINE
+
+#
+# LIBCFS_SCHED_HEADERS
+#
+# 4.11 has broken up sched.h into more headers.
+#
+AC_DEFUN([LIBCFS_SCHED_HEADERS], [
+LB_CHECK_LINUX_HEADER([linux/sched/signal.h], [
+ AC_DEFINE(HAVE_SCHED_HEADERS, 1,
+ [linux/sched header directory exist])])
+]) # LIBCFS_SCHED_HEADERS
+
+#
+# LIBCFS_WAIT_QUEUE_ENTRY
+#
+# Kernel version 4.13 ac6424b981bce1c4bc55675c6ce11bfe1bbfa64f
+# Rename wait_queue_t => wait_queue_entry_t
+#
+AC_DEFUN([LIBCFS_WAIT_QUEUE_ENTRY], [
+LB_CHECK_COMPILE([if 'wait_queue_entry_t' exists],
+wait_queue_entry, [
+ #include <linux/wait.h>
+],[
+ wait_queue_entry_t e;
+
+ e.flags = 0;
+],[
+ AC_DEFINE(HAVE_WAIT_QUEUE_ENTRY, 1,
+ ['wait_queue_entry_t' is available])
+])
+]) # LIBCFS_WAIT_QUEUE_ENTRY
+
+#
+# LIBCFS_NEW_KERNEL_WRITE
+#
+# Kernel version 4.14 e13ec939e96b13e664bb6cee361cc976a0ee621a
+# changed kernel_write prototype to make is plug compatible
+# with the unexported vfs_write()
+#
+AC_DEFUN([LIBCFS_NEW_KERNEL_WRITE], [
+tmp_flags="$EXTRA_KCFLAGS"
+EXTRA_KCFLAGS="-Werror"
+LB_CHECK_COMPILE([if 'kernel_write' matches other read/write helpers],
+kernel_write_match, [
+ #include <linux/fs.h>
+],[
+ const void *buf = NULL;
+ loff_t pos = 0;
+ return kernel_write(NULL, buf, 0, &pos);
+],[
+ AC_DEFINE(HAVE_NEW_KERNEL_WRITE, 1,
+ ['kernel_write' aligns with read/write helpers])
+])
+EXTRA_KCFLAGS="$tmp_flags"
+]) # LIBCFS_NEW_KERNEL_WRITE
+
+#
+# LIBCFS_TIMER_SETUP
+#
+# Kernel version 4.15 commit e99e88a9d2b067465adaa9c111ada99a041bef9a
+# setup_timer() was replaced by timer_setup(), where the callback
+# argument is the structure already holding the struct timer_list.
+#
+AC_DEFUN([LIBCFS_TIMER_SETUP], [
+LB_CHECK_COMPILE([if setup_timer has been replaced with timer_setup],
+timer_setup, [
+ #include <linux/timer.h>
+],[
+ timer_setup(NULL, NULL, 0);
+],[
+ AC_DEFINE(HAVE_TIMER_SETUP, 1,
+ [timer_setup has replaced setup_timer])
+])
+]) # LIBCFS_TIMER_SETUP
+
+#
# LIBCFS_PROG_LINUX
#
# LibCFS linux kernel checks
LC_SHRINKER_WANT_SHRINK_PTR
# 2.6.33
LIBCFS_SYSCTL_CTLNAME
+# 2.6.36
+LIBCFS_MODULE_LOCKING
# 2.6.38
LIBCFS_KSTRTOUL
# 2.6.39
# 3.5
LIBCFS_PROCESS_NAMESPACE
LIBCFS_I_UID_READ
-# 3.7
-LIBCFS_SOCK_ALLOC_FILE
# 3.8
LIBCFS_HAVE_CRC32
LIBCFS_ENABLE_CRC32_ACCEL
# 3.11
LIBCFS_KTIME_GET_TS64
# 3.12
+LIBCFS_KERNEL_PARAM_OPS
LIBCFS_KTIME_ADD
LIBCFS_KTIME_AFTER
+LIBCFS_KTIME_BEFORE
+LIBCFS_KTIME_COMPARE
LIBCFS_SHRINKER_COUNT
# 3.17
LIBCFS_HLIST_ADD_AFTER
LIBCFS_TIMESPEC64
+LIBCFS_KTIME_GET_NS
LIBCFS_KTIME_GET_REAL_TS64
LIBCFS_KTIME_GET_REAL_SECONDS
LIBCFS_KTIME_GET_REAL_NS
# 3.19
LIBCFS_KTIME_GET_SECONDS
LIBCFS_HAVE_CPUMASK_PRINT_TO_PAGEBUF
+# 4.0
+LIBCFS_KTIME_MS_DELTA
+# 4.1
+LIBCFS_KERNEL_PARAM_LOCK
# 4.2
LIBCFS_HAVE_TOPOLOGY_SIBLING_CPUMASK
LIBCFS_FPU_API
+# 4.4
+LIBCFS_KSTRTOBOOL_FROM_USER
# 4.5
LIBCFS_CRYPTO_HASH_HELPERS
+LIBCFS_EXPORT_KSET_FIND_OBJ
# 4.6
LIBCFS_STACKTRACE_OPS_ADDRESS_RETURN_INT
LIBCFS_GET_USER_PAGES_6ARG
LIBCFS_STACKTRACE_OPS
# 4.9
LIBCFS_GET_USER_PAGES_GUP_FLAGS
+# 4.10
+LIBCFS_HOTPLUG_STATE_MACHINE
+# 4.11
+LIBCFS_SCHED_HEADERS
+# 4.13
+LIBCFS_WAIT_QUEUE_ENTRY
+# 4.14
+LIBCFS_NEW_KERNEL_WRITE
+# 4.15
+LIBCFS_TIMER_SETUP
]) # LIBCFS_PROG_LINUX
#
AC_MSG_NOTICE([LibCFS core checks
==============================================================================])
-# lnet/utils/portals.c
-AC_CHECK_HEADERS([asm/types.h endian.h sys/ioctl.h])
-
-# lnet/utils/debug.c
-AC_CHECK_HEADERS([linux/version.h])
-
-AC_CHECK_TYPE([spinlock_t],
- [AC_DEFINE(HAVE_SPINLOCK_T, 1, [spinlock_t is defined])],
- [],
- [#include <linux/spinlock.h>])
-
-# lnet/utils/wirecheck.c
-AC_CHECK_FUNCS([strnlen])
-
-# lnet/libcfs/user-prim.c, missing for RHEL5 and earlier userspace
-AC_CHECK_FUNCS([strlcpy])
-
-# libcfs/libcfs/user-prim.c, missing for RHEL5 and earlier userspace
-AC_CHECK_FUNCS([strlcat])
-
-# libcfs/include/libcfs/linux/linux-prim.h, ...
-AC_CHECK_HEADERS([linux/types.h sys/types.h linux/unistd.h unistd.h])
-
-# libcfs/include/libcfs/linux/linux-prim.h
-AC_CHECK_HEADERS([linux/random.h], [], [],
- [#ifdef HAVE_LINUX_TYPES_H
- #include <linux/types.h>
- #endif
- ])
-
-# libcfs/include/libcfs/linux/libcfs.h
-# libcfs/include/libcfs/byteorder.h
# libcfs/libcfs/util/nidstrings.c
AC_CHECK_HEADERS([netdb.h asm/types.h endian.h])
AC_CHECK_FUNCS([gethostbyname])