Commit | Line | Data |
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9f36eaed MJ |
1 | /* SPDX-License-Identifier: (GPL-2.0 or LGPL-2.1) |
2 | * | |
886d51a3 MD |
3 | * lttng-statedump.c |
4 | * | |
c337ddc2 MD |
5 | * Linux Trace Toolkit Next Generation Kernel State Dump |
6 | * | |
7 | * Copyright 2005 Jean-Hugues Deschenes <jean-hugues.deschenes@polymtl.ca> | |
8 | * Copyright 2006-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
9 | * | |
10 | * Changes: | |
11 | * Eric Clement: Add listing of network IP interface | |
12 | * 2006, 2007 Mathieu Desnoyers Fix kernel threads | |
13 | * Various updates | |
c337ddc2 MD |
14 | */ |
15 | ||
16 | #include <linux/init.h> | |
17 | #include <linux/module.h> | |
18 | #include <linux/netlink.h> | |
19 | #include <linux/inet.h> | |
20 | #include <linux/ip.h> | |
21 | #include <linux/kthread.h> | |
22 | #include <linux/proc_fs.h> | |
23 | #include <linux/file.h> | |
24 | #include <linux/interrupt.h> | |
25 | #include <linux/irqnr.h> | |
26 | #include <linux/cpu.h> | |
27 | #include <linux/netdevice.h> | |
28 | #include <linux/inetdevice.h> | |
29 | #include <linux/sched.h> | |
30 | #include <linux/mm.h> | |
31 | #include <linux/fdtable.h> | |
32 | #include <linux/swap.h> | |
33 | #include <linux/wait.h> | |
34 | #include <linux/mutex.h> | |
f0dbdefb | 35 | #include <linux/device.h> |
c337ddc2 | 36 | |
241ae9a8 MD |
37 | #include <lttng-events.h> |
38 | #include <lttng-tracer.h> | |
39 | #include <wrapper/irqdesc.h> | |
40 | #include <wrapper/spinlock.h> | |
41 | #include <wrapper/fdtable.h> | |
241ae9a8 MD |
42 | #include <wrapper/irq.h> |
43 | #include <wrapper/tracepoint.h> | |
44 | #include <wrapper/genhd.h> | |
45 | #include <wrapper/file.h> | |
46 | #include <wrapper/time.h> | |
c337ddc2 | 47 | |
29784493 | 48 | #ifdef CONFIG_LTTNG_HAS_LIST_IRQ |
c337ddc2 MD |
49 | #include <linux/irq.h> |
50 | #endif | |
51 | ||
52 | /* Define the tracepoints, but do not build the probes */ | |
53 | #define CREATE_TRACE_POINTS | |
241ae9a8 | 54 | #define TRACE_INCLUDE_PATH instrumentation/events/lttng-module |
c337ddc2 | 55 | #define TRACE_INCLUDE_FILE lttng-statedump |
3bc29f0a | 56 | #define LTTNG_INSTRUMENTATION |
241ae9a8 | 57 | #include <instrumentation/events/lttng-module/lttng-statedump.h> |
c337ddc2 | 58 | |
f0dbdefb | 59 | DEFINE_TRACE(lttng_statedump_block_device); |
20591cf7 MD |
60 | DEFINE_TRACE(lttng_statedump_end); |
61 | DEFINE_TRACE(lttng_statedump_interrupt); | |
62 | DEFINE_TRACE(lttng_statedump_file_descriptor); | |
63 | DEFINE_TRACE(lttng_statedump_start); | |
64 | DEFINE_TRACE(lttng_statedump_process_state); | |
65 | DEFINE_TRACE(lttng_statedump_network_interface); | |
d0b55e4c | 66 | #ifdef LTTNG_HAVE_STATEDUMP_CPU_TOPOLOGY |
502e4132 JD |
67 | DEFINE_TRACE(lttng_statedump_cpu_topology); |
68 | #endif | |
20591cf7 | 69 | |
361c023a MD |
70 | struct lttng_fd_ctx { |
71 | char *page; | |
72 | struct lttng_session *session; | |
73 | struct task_struct *p; | |
d561ecfb | 74 | struct files_struct *files; |
361c023a MD |
75 | }; |
76 | ||
c337ddc2 MD |
77 | /* |
78 | * Protected by the trace lock. | |
79 | */ | |
80 | static struct delayed_work cpu_work[NR_CPUS]; | |
81 | static DECLARE_WAIT_QUEUE_HEAD(statedump_wq); | |
82 | static atomic_t kernel_threads_to_run; | |
83 | ||
84 | enum lttng_thread_type { | |
85 | LTTNG_USER_THREAD = 0, | |
86 | LTTNG_KERNEL_THREAD = 1, | |
87 | }; | |
88 | ||
89 | enum lttng_execution_mode { | |
90 | LTTNG_USER_MODE = 0, | |
91 | LTTNG_SYSCALL = 1, | |
92 | LTTNG_TRAP = 2, | |
93 | LTTNG_IRQ = 3, | |
94 | LTTNG_SOFTIRQ = 4, | |
95 | LTTNG_MODE_UNKNOWN = 5, | |
96 | }; | |
97 | ||
98 | enum lttng_execution_submode { | |
99 | LTTNG_NONE = 0, | |
100 | LTTNG_UNKNOWN = 1, | |
101 | }; | |
102 | ||
103 | enum lttng_process_status { | |
104 | LTTNG_UNNAMED = 0, | |
105 | LTTNG_WAIT_FORK = 1, | |
106 | LTTNG_WAIT_CPU = 2, | |
107 | LTTNG_EXIT = 3, | |
108 | LTTNG_ZOMBIE = 4, | |
109 | LTTNG_WAIT = 5, | |
110 | LTTNG_RUN = 6, | |
111 | LTTNG_DEAD = 7, | |
112 | }; | |
113 | ||
f0dbdefb HD |
114 | static |
115 | int lttng_enumerate_block_devices(struct lttng_session *session) | |
116 | { | |
117 | struct class *ptr_block_class; | |
118 | struct device_type *ptr_disk_type; | |
119 | struct class_dev_iter iter; | |
120 | struct device *dev; | |
121 | ||
122 | ptr_block_class = wrapper_get_block_class(); | |
123 | if (!ptr_block_class) | |
124 | return -ENOSYS; | |
125 | ptr_disk_type = wrapper_get_disk_type(); | |
126 | if (!ptr_disk_type) { | |
127 | return -ENOSYS; | |
128 | } | |
129 | class_dev_iter_init(&iter, ptr_block_class, NULL, ptr_disk_type); | |
130 | while ((dev = class_dev_iter_next(&iter))) { | |
131 | struct disk_part_iter piter; | |
132 | struct gendisk *disk = dev_to_disk(dev); | |
133 | struct hd_struct *part; | |
134 | ||
5a91f3df MD |
135 | /* |
136 | * Don't show empty devices or things that have been | |
137 | * suppressed | |
138 | */ | |
139 | if (get_capacity(disk) == 0 || | |
140 | (disk->flags & GENHD_FL_SUPPRESS_PARTITION_INFO)) | |
141 | continue; | |
142 | ||
f0dbdefb HD |
143 | disk_part_iter_init(&piter, disk, DISK_PITER_INCL_PART0); |
144 | while ((part = disk_part_iter_next(&piter))) { | |
145 | char name_buf[BDEVNAME_SIZE]; | |
146 | char *p; | |
147 | ||
148 | p = wrapper_disk_name(disk, part->partno, name_buf); | |
149 | if (!p) { | |
150 | disk_part_iter_exit(&piter); | |
151 | class_dev_iter_exit(&iter); | |
152 | return -ENOSYS; | |
153 | } | |
154 | trace_lttng_statedump_block_device(session, | |
155 | part_devt(part), name_buf); | |
156 | } | |
157 | disk_part_iter_exit(&piter); | |
158 | } | |
159 | class_dev_iter_exit(&iter); | |
160 | return 0; | |
161 | } | |
162 | ||
c337ddc2 | 163 | #ifdef CONFIG_INET |
f0dbdefb | 164 | |
c337ddc2 MD |
165 | static |
166 | void lttng_enumerate_device(struct lttng_session *session, | |
167 | struct net_device *dev) | |
168 | { | |
169 | struct in_device *in_dev; | |
170 | struct in_ifaddr *ifa; | |
171 | ||
172 | if (dev->flags & IFF_UP) { | |
173 | in_dev = in_dev_get(dev); | |
174 | if (in_dev) { | |
175 | for (ifa = in_dev->ifa_list; ifa != NULL; | |
176 | ifa = ifa->ifa_next) { | |
177 | trace_lttng_statedump_network_interface( | |
178 | session, dev, ifa); | |
179 | } | |
180 | in_dev_put(in_dev); | |
181 | } | |
182 | } else { | |
183 | trace_lttng_statedump_network_interface( | |
184 | session, dev, NULL); | |
185 | } | |
186 | } | |
187 | ||
188 | static | |
189 | int lttng_enumerate_network_ip_interface(struct lttng_session *session) | |
190 | { | |
191 | struct net_device *dev; | |
192 | ||
193 | read_lock(&dev_base_lock); | |
194 | for_each_netdev(&init_net, dev) | |
195 | lttng_enumerate_device(session, dev); | |
196 | read_unlock(&dev_base_lock); | |
197 | ||
198 | return 0; | |
199 | } | |
200 | #else /* CONFIG_INET */ | |
201 | static inline | |
202 | int lttng_enumerate_network_ip_interface(struct lttng_session *session) | |
203 | { | |
204 | return 0; | |
205 | } | |
206 | #endif /* CONFIG_INET */ | |
207 | ||
361c023a MD |
208 | static |
209 | int lttng_dump_one_fd(const void *p, struct file *file, unsigned int fd) | |
210 | { | |
211 | const struct lttng_fd_ctx *ctx = p; | |
212 | const char *s = d_path(&file->f_path, ctx->page, PAGE_SIZE); | |
29021503 | 213 | unsigned int flags = file->f_flags; |
d561ecfb | 214 | struct fdtable *fdt; |
361c023a | 215 | |
29021503 MD |
216 | /* |
217 | * We don't expose kernel internal flags, only userspace-visible | |
218 | * flags. | |
219 | */ | |
220 | flags &= ~FMODE_NONOTIFY; | |
d561ecfb MD |
221 | fdt = files_fdtable(ctx->files); |
222 | /* | |
223 | * We need to check here again whether fd is within the fdt | |
224 | * max_fds range, because we might be seeing a different | |
225 | * files_fdtable() than iterate_fd(), assuming only RCU is | |
226 | * protecting the read. In reality, iterate_fd() holds | |
227 | * file_lock, which should ensure the fdt does not change while | |
228 | * the lock is taken, but we are not aware whether this is | |
229 | * guaranteed or not, so play safe. | |
230 | */ | |
aa29f2d3 | 231 | if (fd < fdt->max_fds && lttng_close_on_exec(fd, fdt)) |
29021503 | 232 | flags |= O_CLOEXEC; |
361c023a MD |
233 | if (IS_ERR(s)) { |
234 | struct dentry *dentry = file->f_path.dentry; | |
235 | ||
236 | /* Make sure we give at least some info */ | |
237 | spin_lock(&dentry->d_lock); | |
238 | trace_lttng_statedump_file_descriptor(ctx->session, ctx->p, fd, | |
29021503 | 239 | dentry->d_name.name, flags, file->f_mode); |
361c023a MD |
240 | spin_unlock(&dentry->d_lock); |
241 | goto end; | |
242 | } | |
29021503 MD |
243 | trace_lttng_statedump_file_descriptor(ctx->session, ctx->p, fd, s, |
244 | flags, file->f_mode); | |
361c023a MD |
245 | end: |
246 | return 0; | |
247 | } | |
c337ddc2 MD |
248 | |
249 | static | |
250 | void lttng_enumerate_task_fd(struct lttng_session *session, | |
251 | struct task_struct *p, char *tmp) | |
252 | { | |
361c023a | 253 | struct lttng_fd_ctx ctx = { .page = tmp, .session = session, .p = p }; |
d561ecfb | 254 | struct files_struct *files; |
c337ddc2 MD |
255 | |
256 | task_lock(p); | |
d561ecfb MD |
257 | files = p->files; |
258 | if (!files) | |
259 | goto end; | |
260 | ctx.files = files; | |
261 | lttng_iterate_fd(files, 0, lttng_dump_one_fd, &ctx); | |
262 | end: | |
c337ddc2 MD |
263 | task_unlock(p); |
264 | } | |
265 | ||
266 | static | |
267 | int lttng_enumerate_file_descriptors(struct lttng_session *session) | |
268 | { | |
269 | struct task_struct *p; | |
cfcee1c7 MD |
270 | char *tmp; |
271 | ||
272 | tmp = (char *) __get_free_page(GFP_KERNEL); | |
273 | if (!tmp) | |
274 | return -ENOMEM; | |
c337ddc2 MD |
275 | |
276 | /* Enumerate active file descriptors */ | |
277 | rcu_read_lock(); | |
278 | for_each_process(p) | |
279 | lttng_enumerate_task_fd(session, p, tmp); | |
280 | rcu_read_unlock(); | |
281 | free_page((unsigned long) tmp); | |
282 | return 0; | |
283 | } | |
284 | ||
d0b55e4c | 285 | #ifdef LTTNG_HAVE_STATEDUMP_CPU_TOPOLOGY |
502e4132 JD |
286 | static |
287 | int lttng_enumerate_cpu_topology(struct lttng_session *session) | |
288 | { | |
289 | int cpu; | |
290 | const cpumask_t *cpumask = cpu_possible_mask; | |
291 | ||
292 | for (cpu = cpumask_first(cpumask); cpu < nr_cpu_ids; | |
293 | cpu = cpumask_next(cpu, cpumask)) { | |
294 | trace_lttng_statedump_cpu_topology(session, &cpu_data(cpu)); | |
295 | } | |
296 | ||
297 | return 0; | |
298 | } | |
299 | #else | |
300 | static | |
301 | int lttng_enumerate_cpu_topology(struct lttng_session *session) | |
302 | { | |
303 | return 0; | |
304 | } | |
305 | #endif | |
306 | ||
0658bdda MD |
307 | #if 0 |
308 | /* | |
309 | * FIXME: we cannot take a mmap_sem while in a RCU read-side critical section | |
310 | * (scheduling in atomic). Normally, the tasklist lock protects this kind of | |
311 | * iteration, but it is not exported to modules. | |
312 | */ | |
c337ddc2 MD |
313 | static |
314 | void lttng_enumerate_task_vm_maps(struct lttng_session *session, | |
315 | struct task_struct *p) | |
316 | { | |
317 | struct mm_struct *mm; | |
318 | struct vm_area_struct *map; | |
319 | unsigned long ino; | |
320 | ||
321 | /* get_task_mm does a task_lock... */ | |
322 | mm = get_task_mm(p); | |
323 | if (!mm) | |
324 | return; | |
325 | ||
326 | map = mm->mmap; | |
327 | if (map) { | |
328 | down_read(&mm->mmap_sem); | |
329 | while (map) { | |
330 | if (map->vm_file) | |
b06ed645 | 331 | ino = map->vm_file->lttng_f_dentry->d_inode->i_ino; |
c337ddc2 MD |
332 | else |
333 | ino = 0; | |
334 | trace_lttng_statedump_vm_map(session, p, map, ino); | |
335 | map = map->vm_next; | |
336 | } | |
337 | up_read(&mm->mmap_sem); | |
338 | } | |
339 | mmput(mm); | |
340 | } | |
341 | ||
342 | static | |
343 | int lttng_enumerate_vm_maps(struct lttng_session *session) | |
344 | { | |
345 | struct task_struct *p; | |
346 | ||
347 | rcu_read_lock(); | |
348 | for_each_process(p) | |
349 | lttng_enumerate_task_vm_maps(session, p); | |
350 | rcu_read_unlock(); | |
351 | return 0; | |
352 | } | |
0658bdda | 353 | #endif |
c337ddc2 | 354 | |
29784493 | 355 | #ifdef CONFIG_LTTNG_HAS_LIST_IRQ |
47faec4b JN |
356 | |
357 | #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,39)) | |
358 | #define irq_desc_get_chip(desc) get_irq_desc_chip(desc) | |
359 | #endif | |
360 | ||
c337ddc2 | 361 | static |
cfcee1c7 | 362 | int lttng_list_interrupts(struct lttng_session *session) |
c337ddc2 MD |
363 | { |
364 | unsigned int irq; | |
365 | unsigned long flags = 0; | |
366 | struct irq_desc *desc; | |
367 | ||
368 | #define irq_to_desc wrapper_irq_to_desc | |
369 | /* needs irq_desc */ | |
370 | for_each_irq_desc(irq, desc) { | |
371 | struct irqaction *action; | |
372 | const char *irq_chip_name = | |
373 | irq_desc_get_chip(desc)->name ? : "unnamed_irq_chip"; | |
374 | ||
375 | local_irq_save(flags); | |
3a523f5b | 376 | wrapper_desc_spin_lock(&desc->lock); |
c337ddc2 MD |
377 | for (action = desc->action; action; action = action->next) { |
378 | trace_lttng_statedump_interrupt(session, | |
379 | irq, irq_chip_name, action); | |
380 | } | |
3a523f5b | 381 | wrapper_desc_spin_unlock(&desc->lock); |
c337ddc2 MD |
382 | local_irq_restore(flags); |
383 | } | |
cfcee1c7 | 384 | return 0; |
c337ddc2 MD |
385 | #undef irq_to_desc |
386 | } | |
387 | #else | |
388 | static inline | |
cfcee1c7 | 389 | int lttng_list_interrupts(struct lttng_session *session) |
c337ddc2 | 390 | { |
cfcee1c7 | 391 | return 0; |
c337ddc2 MD |
392 | } |
393 | #endif | |
394 | ||
4ba1f53c MD |
395 | /* |
396 | * Called with task lock held. | |
397 | */ | |
73e8ba37 JD |
398 | static |
399 | void lttng_statedump_process_ns(struct lttng_session *session, | |
400 | struct task_struct *p, | |
401 | enum lttng_thread_type type, | |
402 | enum lttng_execution_mode mode, | |
403 | enum lttng_execution_submode submode, | |
404 | enum lttng_process_status status) | |
405 | { | |
73e8ba37 JD |
406 | struct pid_namespace *pid_ns; |
407 | ||
887bcdac MJ |
408 | pid_ns = task_active_pid_ns(p); |
409 | do { | |
73e8ba37 | 410 | trace_lttng_statedump_process_state(session, |
887bcdac MJ |
411 | p, type, mode, submode, status, pid_ns); |
412 | pid_ns = pid_ns->parent; | |
413 | } while (pid_ns); | |
73e8ba37 JD |
414 | } |
415 | ||
c337ddc2 MD |
416 | static |
417 | int lttng_enumerate_process_states(struct lttng_session *session) | |
418 | { | |
419 | struct task_struct *g, *p; | |
420 | ||
421 | rcu_read_lock(); | |
422 | for_each_process(g) { | |
423 | p = g; | |
424 | do { | |
425 | enum lttng_execution_mode mode = | |
426 | LTTNG_MODE_UNKNOWN; | |
427 | enum lttng_execution_submode submode = | |
428 | LTTNG_UNKNOWN; | |
429 | enum lttng_process_status status; | |
430 | enum lttng_thread_type type; | |
431 | ||
432 | task_lock(p); | |
433 | if (p->exit_state == EXIT_ZOMBIE) | |
434 | status = LTTNG_ZOMBIE; | |
435 | else if (p->exit_state == EXIT_DEAD) | |
436 | status = LTTNG_DEAD; | |
437 | else if (p->state == TASK_RUNNING) { | |
438 | /* Is this a forked child that has not run yet? */ | |
439 | if (list_empty(&p->rt.run_list)) | |
440 | status = LTTNG_WAIT_FORK; | |
441 | else | |
442 | /* | |
443 | * All tasks are considered as wait_cpu; | |
444 | * the viewer will sort out if the task | |
445 | * was really running at this time. | |
446 | */ | |
447 | status = LTTNG_WAIT_CPU; | |
448 | } else if (p->state & | |
449 | (TASK_INTERRUPTIBLE | TASK_UNINTERRUPTIBLE)) { | |
450 | /* Task is waiting for something to complete */ | |
451 | status = LTTNG_WAIT; | |
452 | } else | |
453 | status = LTTNG_UNNAMED; | |
454 | submode = LTTNG_NONE; | |
455 | ||
456 | /* | |
457 | * Verification of t->mm is to filter out kernel | |
458 | * threads; Viewer will further filter out if a | |
459 | * user-space thread was in syscall mode or not. | |
460 | */ | |
461 | if (p->mm) | |
462 | type = LTTNG_USER_THREAD; | |
463 | else | |
464 | type = LTTNG_KERNEL_THREAD; | |
73e8ba37 | 465 | lttng_statedump_process_ns(session, |
c337ddc2 MD |
466 | p, type, mode, submode, status); |
467 | task_unlock(p); | |
468 | } while_each_thread(g, p); | |
469 | } | |
470 | rcu_read_unlock(); | |
471 | ||
472 | return 0; | |
473 | } | |
474 | ||
475 | static | |
476 | void lttng_statedump_work_func(struct work_struct *work) | |
477 | { | |
478 | if (atomic_dec_and_test(&kernel_threads_to_run)) | |
479 | /* If we are the last thread, wake up do_lttng_statedump */ | |
480 | wake_up(&statedump_wq); | |
481 | } | |
482 | ||
483 | static | |
484 | int do_lttng_statedump(struct lttng_session *session) | |
485 | { | |
cfcee1c7 | 486 | int cpu, ret; |
c337ddc2 | 487 | |
c337ddc2 | 488 | trace_lttng_statedump_start(session); |
cfcee1c7 MD |
489 | ret = lttng_enumerate_process_states(session); |
490 | if (ret) | |
491 | return ret; | |
492 | ret = lttng_enumerate_file_descriptors(session); | |
493 | if (ret) | |
494 | return ret; | |
495 | /* | |
496 | * FIXME | |
497 | * ret = lttng_enumerate_vm_maps(session); | |
498 | * if (ret) | |
499 | * return ret; | |
500 | */ | |
501 | ret = lttng_list_interrupts(session); | |
502 | if (ret) | |
503 | return ret; | |
504 | ret = lttng_enumerate_network_ip_interface(session); | |
505 | if (ret) | |
506 | return ret; | |
507 | ret = lttng_enumerate_block_devices(session); | |
508 | switch (ret) { | |
84c7055e MD |
509 | case 0: |
510 | break; | |
cfcee1c7 MD |
511 | case -ENOSYS: |
512 | printk(KERN_WARNING "LTTng: block device enumeration is not supported by kernel\n"); | |
513 | break; | |
514 | default: | |
515 | return ret; | |
516 | } | |
502e4132 JD |
517 | ret = lttng_enumerate_cpu_topology(session); |
518 | if (ret) | |
519 | return ret; | |
c337ddc2 MD |
520 | |
521 | /* TODO lttng_dump_idt_table(session); */ | |
522 | /* TODO lttng_dump_softirq_vec(session); */ | |
523 | /* TODO lttng_list_modules(session); */ | |
524 | /* TODO lttng_dump_swap_files(session); */ | |
525 | ||
526 | /* | |
527 | * Fire off a work queue on each CPU. Their sole purpose in life | |
528 | * is to guarantee that each CPU has been in a state where is was in | |
529 | * syscall mode (i.e. not in a trap, an IRQ or a soft IRQ). | |
530 | */ | |
531 | get_online_cpus(); | |
532 | atomic_set(&kernel_threads_to_run, num_online_cpus()); | |
533 | for_each_online_cpu(cpu) { | |
534 | INIT_DELAYED_WORK(&cpu_work[cpu], lttng_statedump_work_func); | |
535 | schedule_delayed_work_on(cpu, &cpu_work[cpu], 0); | |
536 | } | |
537 | /* Wait for all threads to run */ | |
7a7128e0 | 538 | __wait_event(statedump_wq, (atomic_read(&kernel_threads_to_run) == 0)); |
c337ddc2 MD |
539 | put_online_cpus(); |
540 | /* Our work is done */ | |
c337ddc2 MD |
541 | trace_lttng_statedump_end(session); |
542 | return 0; | |
543 | } | |
544 | ||
545 | /* | |
546 | * Called with session mutex held. | |
547 | */ | |
548 | int lttng_statedump_start(struct lttng_session *session) | |
549 | { | |
c337ddc2 MD |
550 | return do_lttng_statedump(session); |
551 | } | |
552 | EXPORT_SYMBOL_GPL(lttng_statedump_start); | |
553 | ||
dd8d5afb MD |
554 | static |
555 | int __init lttng_statedump_init(void) | |
556 | { | |
d16aa9c9 MD |
557 | /* |
558 | * Allow module to load even if the fixup cannot be done. This | |
559 | * will allow seemless transition when the underlying issue fix | |
560 | * is merged into the Linux kernel, and when tracepoint.c | |
561 | * "tracepoint_module_notify" is turned into a static function. | |
562 | */ | |
563 | (void) wrapper_lttng_fixup_sig(THIS_MODULE); | |
564 | return 0; | |
dd8d5afb MD |
565 | } |
566 | ||
567 | module_init(lttng_statedump_init); | |
568 | ||
461277e7 MD |
569 | static |
570 | void __exit lttng_statedump_exit(void) | |
571 | { | |
572 | } | |
573 | ||
574 | module_exit(lttng_statedump_exit); | |
575 | ||
c337ddc2 MD |
576 | MODULE_LICENSE("GPL and additional rights"); |
577 | MODULE_AUTHOR("Jean-Hugues Deschenes"); | |
1c124020 | 578 | MODULE_DESCRIPTION("LTTng statedump provider"); |
13ab8b0a MD |
579 | MODULE_VERSION(__stringify(LTTNG_MODULES_MAJOR_VERSION) "." |
580 | __stringify(LTTNG_MODULES_MINOR_VERSION) "." | |
581 | __stringify(LTTNG_MODULES_PATCHLEVEL_VERSION) | |
582 | LTTNG_MODULES_EXTRAVERSION); |