/usr/src/lttng-modules-2.4.0/wrapper/tracepoint.h is in lttng-modules-dkms 2.4.0-1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 | #ifndef _LTTNG_WRAPPER_TRACEPOINT_H
#define _LTTNG_WRAPPER_TRACEPOINT_H
/*
* 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
*/
#include <linux/version.h>
#include <linux/tracepoint.h>
#include <linux/module.h>
#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,35))
#define DECLARE_EVENT_CLASS(name, proto, args, tstruct, assign, print)
#endif
#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 */
#ifdef CONFIG_MODULE_SIG
#include <linux/kallsyms.h>
#include "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(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;
}
}
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 /* CONFIG_MODULE_SIG */
static inline
int wrapper_lttng_fixup_sig(struct module *mod)
{
return 0;
}
#endif /* #else CONFIG_MODULE_SIG */
#endif /* _LTTNG_WRAPPER_TRACEPOINT_H */
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