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64db4cff PM |
1 | /* |
2 | * Read-Copy Update tracing for classic implementation | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify | |
5 | * it under the terms of the GNU General Public License as published by | |
6 | * the Free Software Foundation; either version 2 of the License, or | |
7 | * (at your option) any later version. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program; if not, write to the Free Software | |
16 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
17 | * | |
18 | * Copyright IBM Corporation, 2008 | |
19 | * | |
20 | * Papers: http://www.rdrop.com/users/paulmck/RCU | |
21 | * | |
22 | * For detailed explanation of Read-Copy Update mechanism see - | |
a71fca58 | 23 | * Documentation/RCU |
64db4cff PM |
24 | * |
25 | */ | |
26 | #include <linux/types.h> | |
27 | #include <linux/kernel.h> | |
28 | #include <linux/init.h> | |
29 | #include <linux/spinlock.h> | |
30 | #include <linux/smp.h> | |
31 | #include <linux/rcupdate.h> | |
32 | #include <linux/interrupt.h> | |
33 | #include <linux/sched.h> | |
34 | #include <asm/atomic.h> | |
35 | #include <linux/bitops.h> | |
36 | #include <linux/module.h> | |
37 | #include <linux/completion.h> | |
38 | #include <linux/moduleparam.h> | |
39 | #include <linux/percpu.h> | |
40 | #include <linux/notifier.h> | |
41 | #include <linux/cpu.h> | |
42 | #include <linux/mutex.h> | |
43 | #include <linux/debugfs.h> | |
44 | #include <linux/seq_file.h> | |
45 | ||
9f77da9f | 46 | #define RCU_TREE_NONCORE |
6258c4fb IM |
47 | #include "rcutree.h" |
48 | ||
d71df90e | 49 | DECLARE_PER_CPU(unsigned int, rcu_cpu_kthread_status); |
15ba0ba8 | 50 | DECLARE_PER_CPU(unsigned int, rcu_cpu_kthread_cpu); |
5ece5bab | 51 | DECLARE_PER_CPU(unsigned int, rcu_cpu_kthread_loops); |
d71df90e PM |
52 | DECLARE_PER_CPU(char, rcu_cpu_has_work); |
53 | ||
54 | static char convert_kthread_status(unsigned int kthread_status) | |
55 | { | |
56 | if (kthread_status > RCU_KTHREAD_MAX) | |
57 | return '?'; | |
15ba0ba8 | 58 | return "SRWOY"[kthread_status]; |
d71df90e PM |
59 | } |
60 | ||
64db4cff PM |
61 | static void print_one_rcu_data(struct seq_file *m, struct rcu_data *rdp) |
62 | { | |
63 | if (!rdp->beenonline) | |
64 | return; | |
20133cfc | 65 | seq_printf(m, "%3d%cc=%lu g=%lu pq=%d pqc=%lu qp=%d", |
64db4cff PM |
66 | rdp->cpu, |
67 | cpu_is_offline(rdp->cpu) ? '!' : ' ', | |
68 | rdp->completed, rdp->gpnum, | |
69 | rdp->passed_quiesc, rdp->passed_quiesc_completed, | |
ef631b0c | 70 | rdp->qs_pending); |
64db4cff | 71 | #ifdef CONFIG_NO_HZ |
23b5c8fa PM |
72 | seq_printf(m, " dt=%d/%d/%d df=%lu", |
73 | atomic_read(&rdp->dynticks->dynticks), | |
64db4cff | 74 | rdp->dynticks->dynticks_nesting, |
23b5c8fa | 75 | rdp->dynticks->dynticks_nmi_nesting, |
64db4cff PM |
76 | rdp->dynticks_fqs); |
77 | #endif /* #ifdef CONFIG_NO_HZ */ | |
78 | seq_printf(m, " of=%lu ri=%lu", rdp->offline_fqs, rdp->resched_ipi); | |
5ece5bab | 79 | seq_printf(m, " ql=%ld qs=%c%c%c%c kt=%d/%c/%d ktl=%x b=%ld", |
0ac3d136 PM |
80 | rdp->qlen, |
81 | ".N"[rdp->nxttail[RCU_NEXT_READY_TAIL] != | |
82 | rdp->nxttail[RCU_NEXT_TAIL]], | |
83 | ".R"[rdp->nxttail[RCU_WAIT_TAIL] != | |
84 | rdp->nxttail[RCU_NEXT_READY_TAIL]], | |
85 | ".W"[rdp->nxttail[RCU_DONE_TAIL] != | |
86 | rdp->nxttail[RCU_WAIT_TAIL]], | |
87 | ".D"[&rdp->nxtlist != rdp->nxttail[RCU_DONE_TAIL]], | |
d71df90e PM |
88 | per_cpu(rcu_cpu_has_work, rdp->cpu), |
89 | convert_kthread_status(per_cpu(rcu_cpu_kthread_status, | |
90 | rdp->cpu)), | |
15ba0ba8 | 91 | per_cpu(rcu_cpu_kthread_cpu, rdp->cpu), |
5ece5bab | 92 | per_cpu(rcu_cpu_kthread_loops, rdp->cpu) & 0xffff, |
0ac3d136 | 93 | rdp->blimit); |
269dcc1c PM |
94 | seq_printf(m, " ci=%lu co=%lu ca=%lu\n", |
95 | rdp->n_cbs_invoked, rdp->n_cbs_orphaned, rdp->n_cbs_adopted); | |
64db4cff PM |
96 | } |
97 | ||
98 | #define PRINT_RCU_DATA(name, func, m) \ | |
99 | do { \ | |
100 | int _p_r_d_i; \ | |
101 | \ | |
102 | for_each_possible_cpu(_p_r_d_i) \ | |
103 | func(m, &per_cpu(name, _p_r_d_i)); \ | |
104 | } while (0) | |
105 | ||
106 | static int show_rcudata(struct seq_file *m, void *unused) | |
107 | { | |
f41d911f PM |
108 | #ifdef CONFIG_TREE_PREEMPT_RCU |
109 | seq_puts(m, "rcu_preempt:\n"); | |
110 | PRINT_RCU_DATA(rcu_preempt_data, print_one_rcu_data, m); | |
111 | #endif /* #ifdef CONFIG_TREE_PREEMPT_RCU */ | |
d6714c22 PM |
112 | seq_puts(m, "rcu_sched:\n"); |
113 | PRINT_RCU_DATA(rcu_sched_data, print_one_rcu_data, m); | |
64db4cff PM |
114 | seq_puts(m, "rcu_bh:\n"); |
115 | PRINT_RCU_DATA(rcu_bh_data, print_one_rcu_data, m); | |
116 | return 0; | |
117 | } | |
118 | ||
119 | static int rcudata_open(struct inode *inode, struct file *file) | |
120 | { | |
121 | return single_open(file, show_rcudata, NULL); | |
122 | } | |
123 | ||
9b2619af | 124 | static const struct file_operations rcudata_fops = { |
64db4cff PM |
125 | .owner = THIS_MODULE, |
126 | .open = rcudata_open, | |
127 | .read = seq_read, | |
128 | .llseek = seq_lseek, | |
129 | .release = single_release, | |
130 | }; | |
131 | ||
132 | static void print_one_rcu_data_csv(struct seq_file *m, struct rcu_data *rdp) | |
133 | { | |
134 | if (!rdp->beenonline) | |
135 | return; | |
20133cfc | 136 | seq_printf(m, "%d,%s,%lu,%lu,%d,%lu,%d", |
64db4cff | 137 | rdp->cpu, |
5699ed8f | 138 | cpu_is_offline(rdp->cpu) ? "\"N\"" : "\"Y\"", |
64db4cff PM |
139 | rdp->completed, rdp->gpnum, |
140 | rdp->passed_quiesc, rdp->passed_quiesc_completed, | |
ef631b0c | 141 | rdp->qs_pending); |
64db4cff PM |
142 | #ifdef CONFIG_NO_HZ |
143 | seq_printf(m, ",%d,%d,%d,%lu", | |
23b5c8fa | 144 | atomic_read(&rdp->dynticks->dynticks), |
64db4cff | 145 | rdp->dynticks->dynticks_nesting, |
23b5c8fa | 146 | rdp->dynticks->dynticks_nmi_nesting, |
64db4cff PM |
147 | rdp->dynticks_fqs); |
148 | #endif /* #ifdef CONFIG_NO_HZ */ | |
149 | seq_printf(m, ",%lu,%lu", rdp->offline_fqs, rdp->resched_ipi); | |
d71df90e | 150 | seq_printf(m, ",%ld,\"%c%c%c%c\",%d,\"%c\",%ld", rdp->qlen, |
0ac3d136 PM |
151 | ".N"[rdp->nxttail[RCU_NEXT_READY_TAIL] != |
152 | rdp->nxttail[RCU_NEXT_TAIL]], | |
153 | ".R"[rdp->nxttail[RCU_WAIT_TAIL] != | |
154 | rdp->nxttail[RCU_NEXT_READY_TAIL]], | |
155 | ".W"[rdp->nxttail[RCU_DONE_TAIL] != | |
156 | rdp->nxttail[RCU_WAIT_TAIL]], | |
157 | ".D"[&rdp->nxtlist != rdp->nxttail[RCU_DONE_TAIL]], | |
d71df90e PM |
158 | per_cpu(rcu_cpu_has_work, rdp->cpu), |
159 | convert_kthread_status(per_cpu(rcu_cpu_kthread_status, | |
160 | rdp->cpu)), | |
0ac3d136 | 161 | rdp->blimit); |
269dcc1c PM |
162 | seq_printf(m, ",%lu,%lu,%lu\n", |
163 | rdp->n_cbs_invoked, rdp->n_cbs_orphaned, rdp->n_cbs_adopted); | |
64db4cff PM |
164 | } |
165 | ||
166 | static int show_rcudata_csv(struct seq_file *m, void *unused) | |
167 | { | |
ef631b0c | 168 | seq_puts(m, "\"CPU\",\"Online?\",\"c\",\"g\",\"pq\",\"pqc\",\"pq\","); |
64db4cff | 169 | #ifdef CONFIG_NO_HZ |
23b5c8fa | 170 | seq_puts(m, "\"dt\",\"dt nesting\",\"dt NMI nesting\",\"df\","); |
64db4cff | 171 | #endif /* #ifdef CONFIG_NO_HZ */ |
269dcc1c | 172 | seq_puts(m, "\"of\",\"ri\",\"ql\",\"b\",\"ci\",\"co\",\"ca\"\n"); |
f41d911f PM |
173 | #ifdef CONFIG_TREE_PREEMPT_RCU |
174 | seq_puts(m, "\"rcu_preempt:\"\n"); | |
175 | PRINT_RCU_DATA(rcu_preempt_data, print_one_rcu_data_csv, m); | |
176 | #endif /* #ifdef CONFIG_TREE_PREEMPT_RCU */ | |
d6714c22 PM |
177 | seq_puts(m, "\"rcu_sched:\"\n"); |
178 | PRINT_RCU_DATA(rcu_sched_data, print_one_rcu_data_csv, m); | |
64db4cff PM |
179 | seq_puts(m, "\"rcu_bh:\"\n"); |
180 | PRINT_RCU_DATA(rcu_bh_data, print_one_rcu_data_csv, m); | |
181 | return 0; | |
182 | } | |
183 | ||
184 | static int rcudata_csv_open(struct inode *inode, struct file *file) | |
185 | { | |
186 | return single_open(file, show_rcudata_csv, NULL); | |
187 | } | |
188 | ||
9b2619af | 189 | static const struct file_operations rcudata_csv_fops = { |
64db4cff PM |
190 | .owner = THIS_MODULE, |
191 | .open = rcudata_csv_open, | |
192 | .read = seq_read, | |
193 | .llseek = seq_lseek, | |
194 | .release = single_release, | |
195 | }; | |
196 | ||
0ea1f2eb PM |
197 | #ifdef CONFIG_RCU_BOOST |
198 | ||
199 | static void print_one_rcu_node_boost(struct seq_file *m, struct rcu_node *rnp) | |
200 | { | |
d71df90e | 201 | seq_printf(m, "%d:%d tasks=%c%c%c%c kt=%c ntb=%lu neb=%lu nnb=%lu " |
0ea1f2eb PM |
202 | "j=%04x bt=%04x\n", |
203 | rnp->grplo, rnp->grphi, | |
204 | "T."[list_empty(&rnp->blkd_tasks)], | |
205 | "N."[!rnp->gp_tasks], | |
206 | "E."[!rnp->exp_tasks], | |
207 | "B."[!rnp->boost_tasks], | |
d71df90e | 208 | convert_kthread_status(rnp->boost_kthread_status), |
0ea1f2eb PM |
209 | rnp->n_tasks_boosted, rnp->n_exp_boosts, |
210 | rnp->n_normal_boosts, | |
211 | (int)(jiffies & 0xffff), | |
212 | (int)(rnp->boost_time & 0xffff)); | |
213 | seq_printf(m, "%s: nt=%lu egt=%lu bt=%lu nb=%lu ny=%lu nos=%lu\n", | |
214 | " balk", | |
215 | rnp->n_balk_blkd_tasks, | |
216 | rnp->n_balk_exp_gp_tasks, | |
217 | rnp->n_balk_boost_tasks, | |
218 | rnp->n_balk_notblocked, | |
219 | rnp->n_balk_notyet, | |
220 | rnp->n_balk_nos); | |
221 | } | |
222 | ||
223 | static int show_rcu_node_boost(struct seq_file *m, void *unused) | |
224 | { | |
225 | struct rcu_node *rnp; | |
226 | ||
227 | rcu_for_each_leaf_node(&rcu_preempt_state, rnp) | |
228 | print_one_rcu_node_boost(m, rnp); | |
229 | return 0; | |
230 | } | |
231 | ||
232 | static int rcu_node_boost_open(struct inode *inode, struct file *file) | |
233 | { | |
234 | return single_open(file, show_rcu_node_boost, NULL); | |
235 | } | |
236 | ||
237 | static const struct file_operations rcu_node_boost_fops = { | |
238 | .owner = THIS_MODULE, | |
239 | .open = rcu_node_boost_open, | |
240 | .read = seq_read, | |
241 | .llseek = seq_lseek, | |
242 | .release = single_release, | |
243 | }; | |
244 | ||
245 | /* | |
246 | * Create the rcuboost debugfs entry. Standard error return. | |
247 | */ | |
248 | static int rcu_boost_trace_create_file(struct dentry *rcudir) | |
249 | { | |
250 | return !debugfs_create_file("rcuboost", 0444, rcudir, NULL, | |
251 | &rcu_node_boost_fops); | |
252 | } | |
253 | ||
254 | #else /* #ifdef CONFIG_RCU_BOOST */ | |
255 | ||
256 | static int rcu_boost_trace_create_file(struct dentry *rcudir) | |
257 | { | |
258 | return 0; /* There cannot be an error if we didn't create it! */ | |
259 | } | |
260 | ||
261 | #endif /* #else #ifdef CONFIG_RCU_BOOST */ | |
262 | ||
64db4cff PM |
263 | static void print_one_rcu_state(struct seq_file *m, struct rcu_state *rsp) |
264 | { | |
20133cfc | 265 | unsigned long gpnum; |
64db4cff PM |
266 | int level = 0; |
267 | struct rcu_node *rnp; | |
268 | ||
3397e040 | 269 | gpnum = rsp->gpnum; |
20133cfc | 270 | seq_printf(m, "c=%lu g=%lu s=%d jfq=%ld j=%x " |
29494be7 | 271 | "nfqs=%lu/nfqsng=%lu(%lu) fqlh=%lu\n", |
3397e040 | 272 | rsp->completed, gpnum, rsp->signaled, |
64db4cff PM |
273 | (long)(rsp->jiffies_force_qs - jiffies), |
274 | (int)(jiffies & 0xffff), | |
275 | rsp->n_force_qs, rsp->n_force_qs_ngp, | |
276 | rsp->n_force_qs - rsp->n_force_qs_ngp, | |
29494be7 | 277 | rsp->n_force_qs_lh); |
64db4cff PM |
278 | for (rnp = &rsp->node[0]; rnp - &rsp->node[0] < NUM_RCU_NODES; rnp++) { |
279 | if (rnp->level != level) { | |
280 | seq_puts(m, "\n"); | |
281 | level = rnp->level; | |
282 | } | |
12f5f524 | 283 | seq_printf(m, "%lx/%lx %c%c>%c %d:%d ^%d ", |
64db4cff | 284 | rnp->qsmask, rnp->qsmaskinit, |
12f5f524 PM |
285 | ".G"[rnp->gp_tasks != NULL], |
286 | ".E"[rnp->exp_tasks != NULL], | |
287 | ".T"[!list_empty(&rnp->blkd_tasks)], | |
64db4cff PM |
288 | rnp->grplo, rnp->grphi, rnp->grpnum); |
289 | } | |
290 | seq_puts(m, "\n"); | |
291 | } | |
292 | ||
293 | static int show_rcuhier(struct seq_file *m, void *unused) | |
294 | { | |
f41d911f PM |
295 | #ifdef CONFIG_TREE_PREEMPT_RCU |
296 | seq_puts(m, "rcu_preempt:\n"); | |
297 | print_one_rcu_state(m, &rcu_preempt_state); | |
298 | #endif /* #ifdef CONFIG_TREE_PREEMPT_RCU */ | |
d6714c22 PM |
299 | seq_puts(m, "rcu_sched:\n"); |
300 | print_one_rcu_state(m, &rcu_sched_state); | |
64db4cff PM |
301 | seq_puts(m, "rcu_bh:\n"); |
302 | print_one_rcu_state(m, &rcu_bh_state); | |
303 | return 0; | |
304 | } | |
305 | ||
306 | static int rcuhier_open(struct inode *inode, struct file *file) | |
307 | { | |
308 | return single_open(file, show_rcuhier, NULL); | |
309 | } | |
310 | ||
9b2619af | 311 | static const struct file_operations rcuhier_fops = { |
64db4cff PM |
312 | .owner = THIS_MODULE, |
313 | .open = rcuhier_open, | |
314 | .read = seq_read, | |
315 | .llseek = seq_lseek, | |
316 | .release = single_release, | |
317 | }; | |
318 | ||
15ba0ba8 PM |
319 | static void show_one_rcugp(struct seq_file *m, struct rcu_state *rsp) |
320 | { | |
321 | unsigned long flags; | |
322 | unsigned long completed; | |
323 | unsigned long gpnum; | |
324 | unsigned long gpage; | |
325 | unsigned long gpmax; | |
326 | struct rcu_node *rnp = &rsp->node[0]; | |
327 | ||
328 | raw_spin_lock_irqsave(&rnp->lock, flags); | |
329 | completed = rsp->completed; | |
330 | gpnum = rsp->gpnum; | |
331 | if (rsp->completed == rsp->gpnum) | |
332 | gpage = 0; | |
333 | else | |
334 | gpage = jiffies - rsp->gp_start; | |
335 | gpmax = rsp->gp_max; | |
336 | raw_spin_unlock_irqrestore(&rnp->lock, flags); | |
337 | seq_printf(m, "%s: completed=%ld gpnum=%lu age=%ld max=%ld\n", | |
338 | rsp->name, completed, gpnum, gpage, gpmax); | |
339 | } | |
340 | ||
64db4cff PM |
341 | static int show_rcugp(struct seq_file *m, void *unused) |
342 | { | |
f41d911f | 343 | #ifdef CONFIG_TREE_PREEMPT_RCU |
15ba0ba8 | 344 | show_one_rcugp(m, &rcu_preempt_state); |
f41d911f | 345 | #endif /* #ifdef CONFIG_TREE_PREEMPT_RCU */ |
15ba0ba8 PM |
346 | show_one_rcugp(m, &rcu_sched_state); |
347 | show_one_rcugp(m, &rcu_bh_state); | |
64db4cff PM |
348 | return 0; |
349 | } | |
350 | ||
351 | static int rcugp_open(struct inode *inode, struct file *file) | |
352 | { | |
353 | return single_open(file, show_rcugp, NULL); | |
354 | } | |
355 | ||
9b2619af | 356 | static const struct file_operations rcugp_fops = { |
64db4cff PM |
357 | .owner = THIS_MODULE, |
358 | .open = rcugp_open, | |
359 | .read = seq_read, | |
360 | .llseek = seq_lseek, | |
361 | .release = single_release, | |
362 | }; | |
363 | ||
7ba5c840 PM |
364 | static void print_one_rcu_pending(struct seq_file *m, struct rcu_data *rdp) |
365 | { | |
366 | seq_printf(m, "%3d%cnp=%ld " | |
d21670ac PM |
367 | "qsp=%ld rpq=%ld cbr=%ld cng=%ld " |
368 | "gpc=%ld gps=%ld nf=%ld nn=%ld\n", | |
7ba5c840 PM |
369 | rdp->cpu, |
370 | cpu_is_offline(rdp->cpu) ? '!' : ' ', | |
371 | rdp->n_rcu_pending, | |
372 | rdp->n_rp_qs_pending, | |
d21670ac | 373 | rdp->n_rp_report_qs, |
7ba5c840 PM |
374 | rdp->n_rp_cb_ready, |
375 | rdp->n_rp_cpu_needs_gp, | |
376 | rdp->n_rp_gp_completed, | |
377 | rdp->n_rp_gp_started, | |
378 | rdp->n_rp_need_fqs, | |
379 | rdp->n_rp_need_nothing); | |
380 | } | |
381 | ||
382 | static void print_rcu_pendings(struct seq_file *m, struct rcu_state *rsp) | |
383 | { | |
384 | int cpu; | |
385 | struct rcu_data *rdp; | |
386 | ||
387 | for_each_possible_cpu(cpu) { | |
394f99a9 | 388 | rdp = per_cpu_ptr(rsp->rda, cpu); |
7ba5c840 PM |
389 | if (rdp->beenonline) |
390 | print_one_rcu_pending(m, rdp); | |
391 | } | |
392 | } | |
393 | ||
394 | static int show_rcu_pending(struct seq_file *m, void *unused) | |
395 | { | |
f41d911f PM |
396 | #ifdef CONFIG_TREE_PREEMPT_RCU |
397 | seq_puts(m, "rcu_preempt:\n"); | |
398 | print_rcu_pendings(m, &rcu_preempt_state); | |
399 | #endif /* #ifdef CONFIG_TREE_PREEMPT_RCU */ | |
d6714c22 PM |
400 | seq_puts(m, "rcu_sched:\n"); |
401 | print_rcu_pendings(m, &rcu_sched_state); | |
7ba5c840 PM |
402 | seq_puts(m, "rcu_bh:\n"); |
403 | print_rcu_pendings(m, &rcu_bh_state); | |
404 | return 0; | |
405 | } | |
406 | ||
407 | static int rcu_pending_open(struct inode *inode, struct file *file) | |
408 | { | |
409 | return single_open(file, show_rcu_pending, NULL); | |
410 | } | |
411 | ||
9b2619af | 412 | static const struct file_operations rcu_pending_fops = { |
7ba5c840 PM |
413 | .owner = THIS_MODULE, |
414 | .open = rcu_pending_open, | |
415 | .read = seq_read, | |
416 | .llseek = seq_lseek, | |
417 | .release = single_release, | |
418 | }; | |
419 | ||
4a298656 PM |
420 | static int show_rcutorture(struct seq_file *m, void *unused) |
421 | { | |
422 | seq_printf(m, "rcutorture test sequence: %lu %s\n", | |
423 | rcutorture_testseq >> 1, | |
424 | (rcutorture_testseq & 0x1) ? "(test in progress)" : ""); | |
425 | seq_printf(m, "rcutorture update version number: %lu\n", | |
426 | rcutorture_vernum); | |
427 | return 0; | |
428 | } | |
429 | ||
430 | static int rcutorture_open(struct inode *inode, struct file *file) | |
431 | { | |
432 | return single_open(file, show_rcutorture, NULL); | |
433 | } | |
434 | ||
435 | static const struct file_operations rcutorture_fops = { | |
436 | .owner = THIS_MODULE, | |
437 | .open = rcutorture_open, | |
438 | .read = seq_read, | |
439 | .llseek = seq_lseek, | |
440 | .release = single_release, | |
441 | }; | |
442 | ||
7ba5c840 | 443 | static struct dentry *rcudir; |
7ba5c840 | 444 | |
deb7a418 | 445 | static int __init rcutree_trace_init(void) |
64db4cff | 446 | { |
22f00b69 PM |
447 | struct dentry *retval; |
448 | ||
64db4cff PM |
449 | rcudir = debugfs_create_dir("rcu", NULL); |
450 | if (!rcudir) | |
22f00b69 | 451 | goto free_out; |
64db4cff | 452 | |
22f00b69 | 453 | retval = debugfs_create_file("rcudata", 0444, rcudir, |
64db4cff | 454 | NULL, &rcudata_fops); |
22f00b69 | 455 | if (!retval) |
64db4cff PM |
456 | goto free_out; |
457 | ||
22f00b69 | 458 | retval = debugfs_create_file("rcudata.csv", 0444, rcudir, |
64db4cff | 459 | NULL, &rcudata_csv_fops); |
22f00b69 | 460 | if (!retval) |
64db4cff PM |
461 | goto free_out; |
462 | ||
0ea1f2eb PM |
463 | if (rcu_boost_trace_create_file(rcudir)) |
464 | goto free_out; | |
465 | ||
22f00b69 PM |
466 | retval = debugfs_create_file("rcugp", 0444, rcudir, NULL, &rcugp_fops); |
467 | if (!retval) | |
64db4cff PM |
468 | goto free_out; |
469 | ||
22f00b69 | 470 | retval = debugfs_create_file("rcuhier", 0444, rcudir, |
64db4cff | 471 | NULL, &rcuhier_fops); |
22f00b69 | 472 | if (!retval) |
64db4cff | 473 | goto free_out; |
7ba5c840 | 474 | |
22f00b69 | 475 | retval = debugfs_create_file("rcu_pending", 0444, rcudir, |
7ba5c840 | 476 | NULL, &rcu_pending_fops); |
22f00b69 | 477 | if (!retval) |
7ba5c840 | 478 | goto free_out; |
4a298656 PM |
479 | |
480 | retval = debugfs_create_file("rcutorture", 0444, rcudir, | |
481 | NULL, &rcutorture_fops); | |
482 | if (!retval) | |
483 | goto free_out; | |
64db4cff PM |
484 | return 0; |
485 | free_out: | |
22f00b69 | 486 | debugfs_remove_recursive(rcudir); |
64db4cff PM |
487 | return 1; |
488 | } | |
489 | ||
deb7a418 | 490 | static void __exit rcutree_trace_cleanup(void) |
64db4cff | 491 | { |
22f00b69 | 492 | debugfs_remove_recursive(rcudir); |
64db4cff PM |
493 | } |
494 | ||
495 | ||
deb7a418 PM |
496 | module_init(rcutree_trace_init); |
497 | module_exit(rcutree_trace_cleanup); | |
64db4cff PM |
498 | |
499 | MODULE_AUTHOR("Paul E. McKenney"); | |
500 | MODULE_DESCRIPTION("Read-Copy Update tracing for hierarchical implementation"); | |
501 | MODULE_LICENSE("GPL"); |