projects / lttng-modules.git / blame
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|---|---|---|
| 3a523f5b MD |
1 | #ifndef _LTTNG_WRAPPER_TRACEPOINT_H |
| 2 | #define _LTTNG_WRAPPER_TRACEPOINT_H | |
| 3 | ||
| 4 | /* | |
| 5 | * wrapper/tracepoint.h | |
| 6 | * | |
| 7 | * wrapper around DECLARE_EVENT_CLASS. | |
| 8 | * | |
| 9 | * Copyright (C) 2011-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
| 10 | * | |
| 11 | * This library is free software; you can redistribute it and/or | |
| 12 | * modify it under the terms of the GNU Lesser General Public | |
| 13 | * License as published by the Free Software Foundation; only | |
| 14 | * version 2.1 of the License. | |
| 15 | * | |
| 16 | * This library is distributed in the hope that it will be useful, | |
| 17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 19 | * Lesser General Public License for more details. | |
| 20 | * | |
| 21 | * You should have received a copy of the GNU Lesser General Public | |
| 22 | * License along with this library; if not, write to the Free Software | |
| 23 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
| 24 | */ | |
| 25 | ||
| 26 | #include <linux/version.h> | |
| 27 | #include <linux/tracepoint.h> | |
| 9f9f9409 | 28 | #include <linux/module.h> |
| 3a523f5b MD |
29 | |
| 30 | #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,35)) | |
| 31 | ||
| 32 | #define DECLARE_EVENT_CLASS(name, proto, args, tstruct, assign, print) | |
| 33 | ||
| 34 | #endif | |
| 35 | ||
| 36 | #ifndef HAVE_KABI_2635_TRACEPOINT | |
| 37 | ||
| 38 | #define kabi_2635_tracepoint_probe_register tracepoint_probe_register | |
| 39 | #define kabi_2635_tracepoint_probe_unregister tracepoint_probe_unregister | |
| 40 | #define kabi_2635_tracepoint_probe_register_noupdate tracepoint_probe_register_noupdate | |
| 41 | #define kabi_2635_tracepoint_probe_unregister_noupdate tracepoint_probe_unregister_noupdate | |
| 42 | ||
| 43 | #endif /* HAVE_KABI_2635_TRACEPOINT */ | |
| 44 | ||
| 9f9f9409 MD |
45 | #ifdef CONFIG_MODULE_SIG |
| 46 | ||
| 47 | #include <linux/kallsyms.h> | |
| 48 | #include "kallsyms.h" | |
| 49 | ||
| 50 | static inline | |
| 51 | int wrapper_tracepoint_module_notify(struct notifier_block *nb, | |
| 52 | unsigned long val, struct module *mod) | |
| 53 | { | |
| 54 | int (*tracepoint_module_notify_sym)(struct notifier_block *nb, | |
| 55 | unsigned long val, struct module *mod); | |
| 56 | ||
| 57 | tracepoint_module_notify_sym = | |
| 58 | (void *) kallsyms_lookup_funcptr("tracepoint_module_notify"); | |
| 59 | if (tracepoint_module_notify_sym) { | |
| 60 | return tracepoint_module_notify_sym(nb, val, mod); | |
| 61 | } else { | |
| 62 | printk(KERN_WARNING "LTTng: tracepoint_module_notify symbol lookup failed.\n"); | |
| 63 | return -ENOSYS; | |
| 64 | } | |
| 65 | } | |
| 66 | ||
| 67 | static inline | |
| 68 | int wrapper_lttng_fixup_sig(struct module *mod) | |
| 69 | { | |
| 70 | int ret = 0; | |
| 71 | ||
| 72 | /* | |
| 73 | * This is for module.c confusing force loaded modules with | |
| 74 | * unsigned modules. | |
| 75 | */ | |
| 76 | if (!THIS_MODULE->sig_ok && | |
| 77 | THIS_MODULE->taints & (1U << TAINT_FORCED_MODULE)) { | |
| 78 | THIS_MODULE->taints &= ~(1U << TAINT_FORCED_MODULE); | |
| 79 | ret = wrapper_tracepoint_module_notify(NULL, | |
| 80 | MODULE_STATE_COMING, mod); | |
| 81 | THIS_MODULE->taints |= (1U << TAINT_FORCED_MODULE); | |
| 82 | } | |
| 83 | return ret; | |
| 84 | } | |
| 85 | ||
| 86 | #else /* CONFIG_MODULE_SIG */ | |
| 87 | ||
| 88 | static inline | |
| 89 | int wrapper_lttng_fixup_sig(struct module *mod) | |
| 90 | { | |
| 91 | return 0; | |
| 92 | } | |
| 93 | ||
| 94 | #endif /* #else CONFIG_MODULE_SIG */ | |
| 95 | ||
| 3a523f5b | 96 | #endif /* _LTTNG_WRAPPER_TRACEPOINT_H */ |