Drop support for kernels < 3.0 from skb instrumentation

[lttng-modules.git] / lttng-events.h

diff --git a/lttng-events.h b/lttng-events.h
index 2b1370520ecd85ab4d39364586ee08fe949d1f6a..19037062d8f4b6c08348aa885c4bbc54b04b4182 100644 (file)
--- a/lttng-events.h
+++ b/lttng-events.h
@@ -1,34 +1,22 @@
-#ifndef _LTTNG_EVENTS_H
-#define _LTTNG_EVENTS_H
-
-/*
+/* SPDX-License-Identifier: (GPL-2.0 or LGPL-2.1)
+ *
  * lttng-events.h
  *
  * Holds LTTng per-session event registry.
  *
  * Copyright (C) 2010-2012 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_EVENTS_H
+#define _LTTNG_EVENTS_H
+
 #include <linux/version.h>
 #include <linux/list.h>
 #include <linux/kprobes.h>
 #include <linux/kref.h>
 #include <lttng-cpuhotplug.h>
-#include <wrapper/uuid.h>
+#include <linux/uuid.h>
+#include <wrapper/uprobes.h>
 #include <lttng-tracer.h>
 #include <lttng-abi.h>
 #include <lttng-abi-old.h>
@@ -297,6 +285,13 @@ struct lttng_enabler_ref {
        struct lttng_enabler *ref;              /* backward ref */
 };
 
+struct lttng_uprobe_handler {
+       struct lttng_event *event;
+       loff_t offset;
+       struct uprobe_consumer up_consumer;
+       struct list_head node;
+};
+
 /*
  * lttng_event structure is referred to by the tracing fast path. It must be
  * kept small.
@@ -322,6 +317,10 @@ struct lttng_event {
                struct {
                        char *symbol_name;
                } ftrace;
+               struct {
+                       struct inode *inode;
+                       struct list_head head;
+               } uprobe;
        } u;
        struct list_head list;          /* Event list in session */
        unsigned int metadata_dumped:1;
@@ -717,7 +716,7 @@ int lttng_add_migratable_to_ctx(struct lttng_ctx **ctx)
 
 int lttng_add_callstack_to_ctx(struct lttng_ctx **ctx, int type);
 
-#if defined(CONFIG_PERF_EVENTS) && (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,33))
+#if defined(CONFIG_PERF_EVENTS)
 int lttng_add_perf_counter_to_ctx(uint32_t type,
                                  uint64_t config,
                                  const char *name,
@@ -784,6 +783,42 @@ void lttng_kprobes_destroy_private(struct lttng_event *event)
 }
 #endif
 
+int lttng_event_add_callsite(struct lttng_event *event,
+       struct lttng_kernel_event_callsite *callsite);
+
+#ifdef CONFIG_UPROBES
+int lttng_uprobes_register(const char *name,
+       int fd, struct lttng_event *event);
+int lttng_uprobes_add_callsite(struct lttng_event *event,
+       struct lttng_kernel_event_callsite *callsite);
+void lttng_uprobes_unregister(struct lttng_event *event);
+void lttng_uprobes_destroy_private(struct lttng_event *event);
+#else
+static inline
+int lttng_uprobes_register(const char *name,
+       int fd, struct lttng_event *event)
+{
+       return -ENOSYS;
+}
+
+static inline
+int lttng_uprobes_add_callsite(struct lttng_event *event,
+       struct lttng_kernel_event_callsite *callsite)
+{
+       return -ENOSYS;
+}
+
+static inline
+void lttng_uprobes_unregister(struct lttng_event *event)
+{
+}
+
+static inline
+void lttng_uprobes_destroy_private(struct lttng_event *event)
+{
+}
+#endif
+
 #ifdef CONFIG_KRETPROBES
 int lttng_kretprobes_register(const char *name,
                const char *symbol_name,
@@ -856,8 +891,6 @@ int lttng_calibrate(struct lttng_kernel_calibrate *calibrate);
 extern const struct file_operations lttng_tracepoint_list_fops;
 extern const struct file_operations lttng_syscall_list_fops;
 
-#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35))
 #define TRACEPOINT_HAS_DATA_ARG
-#endif
 
 #endif /* _LTTNG_EVENTS_H */