-#ifndef _LTTNG_WRAPPER_TRACEPOINT_H
-#define _LTTNG_WRAPPER_TRACEPOINT_H
-
-/*
+/* SPDX-License-Identifier: (GPL-2.0 or LGPL-2.1)
+ *
* wrapper/tracepoint.h
*
* wrapper around DECLARE_EVENT_CLASS.
*
* Copyright (C) 2011-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; only
- * version 2.1 of the License.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
+#ifndef _LTTNG_WRAPPER_TRACEPOINT_H
+#define _LTTNG_WRAPPER_TRACEPOINT_H
+
#include <linux/version.h>
#include <linux/tracepoint.h>
-
-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,35))
-
-#define DECLARE_EVENT_CLASS(name, proto, args, tstruct, assign, print)
-
-#endif
+#include <linux/module.h>
#ifndef HAVE_KABI_2635_TRACEPOINT
#define kabi_2635_tracepoint_probe_register tracepoint_probe_register
#define kabi_2635_tracepoint_probe_unregister tracepoint_probe_unregister
-#define kabi_2635_tracepoint_probe_register_noupdate tracepoint_probe_register_noupdate
-#define kabi_2635_tracepoint_probe_unregister_noupdate tracepoint_probe_unregister_noupdate
#endif /* HAVE_KABI_2635_TRACEPOINT */
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,15,0))
+
+#include <lttng-tracepoint.h>
+
+#define lttng_wrapper_tracepoint_probe_register lttng_tracepoint_probe_register
+#define lttng_wrapper_tracepoint_probe_unregister lttng_tracepoint_probe_unregister
+
+#else /* #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,15,0)) */
+
+#define lttng_wrapper_tracepoint_probe_register kabi_2635_tracepoint_probe_register
+#define lttng_wrapper_tracepoint_probe_unregister kabi_2635_tracepoint_probe_unregister
+
+static inline
+int lttng_tracepoint_init(void)
+{
+ return 0;
+}
+
+static inline
+void lttng_tracepoint_exit(void)
+{
+}
+
+#endif /* #else #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,15,0)) */
+
+#ifdef CONFIG_MODULE_SIG
+
+#include <linux/kallsyms.h>
+#include <wrapper/kallsyms.h>
+
+static inline
+int wrapper_tracepoint_module_notify(struct notifier_block *nb,
+ unsigned long val, struct module *mod)
+{
+ int (*tracepoint_module_notify_sym)(struct notifier_block *nb,
+ unsigned long val, struct module *mod);
+
+ tracepoint_module_notify_sym =
+ (void *) kallsyms_lookup_funcptr("tracepoint_module_notify");
+ if (tracepoint_module_notify_sym) {
+ return tracepoint_module_notify_sym(nb, val, mod);
+ } else {
+ printk_once(KERN_WARNING "LTTng: tracepoint_module_notify symbol lookup failed. It probably means you kernel don't need this work-around. Please consider upgrading LTTng modules to make this warning go away.\n");
+ return -ENOSYS;
+ }
+}
+
+#endif /* CONFIG_MODULE_SIG */
+
+#if defined(CONFIG_MODULE_SIG) && defined(MODULE)
+
+static inline
+int wrapper_lttng_fixup_sig(struct module *mod)
+{
+ int ret = 0;
+
+ /*
+ * This is for module.c confusing force loaded modules with
+ * unsigned modules.
+ */
+ if (!THIS_MODULE->sig_ok &&
+ THIS_MODULE->taints & (1U << TAINT_FORCED_MODULE)) {
+ THIS_MODULE->taints &= ~(1U << TAINT_FORCED_MODULE);
+ ret = wrapper_tracepoint_module_notify(NULL,
+ MODULE_STATE_COMING, mod);
+ THIS_MODULE->taints |= (1U << TAINT_FORCED_MODULE);
+ }
+ return ret;
+}
+
+#else /* #if defined(CONFIG_MODULE_SIG) && defined(MODULE) */
+
+static inline
+int wrapper_lttng_fixup_sig(struct module *mod)
+{
+ return 0;
+}
+
+#endif /*#else #if defined(CONFIG_MODULE_SIG) && defined(MODULE) */
+
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,19,0))
+static inline struct tracepoint *lttng_tracepoint_ptr_deref(tracepoint_ptr_t *p)
+{
+ return tracepoint_ptr_deref(p);
+}
+#else /* #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,19,0)) */
+static inline struct tracepoint *lttng_tracepoint_ptr_deref(struct tracepoint * const *p)
+{
+ return *p;
+}
+#endif /* #else #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,19,0)) */
+
#endif /* _LTTNG_WRAPPER_TRACEPOINT_H */