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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> | |
60063497 | 34 | #include <linux/atomic.h> |
64db4cff PM |
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 | ||
d7e187c8 PM |
49 | static int show_rcubarrier(struct seq_file *m, void *unused) |
50 | { | |
c0cc962d PM |
51 | struct rcu_state *rsp; |
52 | ||
53 | for_each_rcu_flavor(rsp) | |
54 | seq_printf(m, "%s: %c bcc: %d nbd: %lu\n", | |
55 | rsp->name, rsp->rcu_barrier_in_progress ? 'B' : '.', | |
56 | atomic_read(&rsp->barrier_cpu_count), | |
57 | rsp->n_barrier_done); | |
d7e187c8 PM |
58 | return 0; |
59 | } | |
60 | ||
61 | static int rcubarrier_open(struct inode *inode, struct file *file) | |
62 | { | |
63 | return single_open(file, show_rcubarrier, NULL); | |
64 | } | |
65 | ||
66 | static const struct file_operations rcubarrier_fops = { | |
67 | .owner = THIS_MODULE, | |
68 | .open = rcubarrier_open, | |
69 | .read = seq_read, | |
70 | .llseek = seq_lseek, | |
71 | .release = single_release, | |
72 | }; | |
73 | ||
a46e0899 PM |
74 | #ifdef CONFIG_RCU_BOOST |
75 | ||
d71df90e PM |
76 | static char convert_kthread_status(unsigned int kthread_status) |
77 | { | |
78 | if (kthread_status > RCU_KTHREAD_MAX) | |
79 | return '?'; | |
15ba0ba8 | 80 | return "SRWOY"[kthread_status]; |
d71df90e PM |
81 | } |
82 | ||
a46e0899 PM |
83 | #endif /* #ifdef CONFIG_RCU_BOOST */ |
84 | ||
64db4cff PM |
85 | static void print_one_rcu_data(struct seq_file *m, struct rcu_data *rdp) |
86 | { | |
87 | if (!rdp->beenonline) | |
88 | return; | |
e4cc1f22 | 89 | seq_printf(m, "%3d%cc=%lu g=%lu pq=%d pgp=%lu qp=%d", |
64db4cff PM |
90 | rdp->cpu, |
91 | cpu_is_offline(rdp->cpu) ? '!' : ' ', | |
92 | rdp->completed, rdp->gpnum, | |
e4cc1f22 | 93 | rdp->passed_quiesce, rdp->passed_quiesce_gpnum, |
ef631b0c | 94 | rdp->qs_pending); |
9b2e4f18 | 95 | seq_printf(m, " dt=%d/%llx/%d df=%lu", |
23b5c8fa | 96 | atomic_read(&rdp->dynticks->dynticks), |
64db4cff | 97 | rdp->dynticks->dynticks_nesting, |
23b5c8fa | 98 | rdp->dynticks->dynticks_nmi_nesting, |
64db4cff | 99 | rdp->dynticks_fqs); |
2036d94a | 100 | seq_printf(m, " of=%lu", rdp->offline_fqs); |
486e2593 PM |
101 | seq_printf(m, " ql=%ld/%ld qs=%c%c%c%c", |
102 | rdp->qlen_lazy, rdp->qlen, | |
0ac3d136 PM |
103 | ".N"[rdp->nxttail[RCU_NEXT_READY_TAIL] != |
104 | rdp->nxttail[RCU_NEXT_TAIL]], | |
105 | ".R"[rdp->nxttail[RCU_WAIT_TAIL] != | |
106 | rdp->nxttail[RCU_NEXT_READY_TAIL]], | |
107 | ".W"[rdp->nxttail[RCU_DONE_TAIL] != | |
108 | rdp->nxttail[RCU_WAIT_TAIL]], | |
a46e0899 PM |
109 | ".D"[&rdp->nxtlist != rdp->nxttail[RCU_DONE_TAIL]]); |
110 | #ifdef CONFIG_RCU_BOOST | |
111 | seq_printf(m, " kt=%d/%c/%d ktl=%x", | |
d71df90e PM |
112 | per_cpu(rcu_cpu_has_work, rdp->cpu), |
113 | convert_kthread_status(per_cpu(rcu_cpu_kthread_status, | |
114 | rdp->cpu)), | |
15ba0ba8 | 115 | per_cpu(rcu_cpu_kthread_cpu, rdp->cpu), |
a46e0899 PM |
116 | per_cpu(rcu_cpu_kthread_loops, rdp->cpu) & 0xffff); |
117 | #endif /* #ifdef CONFIG_RCU_BOOST */ | |
118 | seq_printf(m, " b=%ld", rdp->blimit); | |
269dcc1c PM |
119 | seq_printf(m, " ci=%lu co=%lu ca=%lu\n", |
120 | rdp->n_cbs_invoked, rdp->n_cbs_orphaned, rdp->n_cbs_adopted); | |
64db4cff PM |
121 | } |
122 | ||
64db4cff PM |
123 | static int show_rcudata(struct seq_file *m, void *unused) |
124 | { | |
c0cc962d PM |
125 | int cpu; |
126 | struct rcu_state *rsp; | |
127 | ||
128 | for_each_rcu_flavor(rsp) { | |
129 | seq_printf(m, "%s:\n", rsp->name); | |
130 | for_each_possible_cpu(cpu) | |
131 | print_one_rcu_data(m, per_cpu_ptr(rsp->rda, cpu)); | |
132 | } | |
64db4cff PM |
133 | return 0; |
134 | } | |
135 | ||
136 | static int rcudata_open(struct inode *inode, struct file *file) | |
137 | { | |
138 | return single_open(file, show_rcudata, NULL); | |
139 | } | |
140 | ||
9b2619af | 141 | static const struct file_operations rcudata_fops = { |
64db4cff PM |
142 | .owner = THIS_MODULE, |
143 | .open = rcudata_open, | |
144 | .read = seq_read, | |
145 | .llseek = seq_lseek, | |
146 | .release = single_release, | |
147 | }; | |
148 | ||
149 | static void print_one_rcu_data_csv(struct seq_file *m, struct rcu_data *rdp) | |
150 | { | |
151 | if (!rdp->beenonline) | |
152 | return; | |
20133cfc | 153 | seq_printf(m, "%d,%s,%lu,%lu,%d,%lu,%d", |
64db4cff | 154 | rdp->cpu, |
5699ed8f | 155 | cpu_is_offline(rdp->cpu) ? "\"N\"" : "\"Y\"", |
64db4cff | 156 | rdp->completed, rdp->gpnum, |
e4cc1f22 | 157 | rdp->passed_quiesce, rdp->passed_quiesce_gpnum, |
ef631b0c | 158 | rdp->qs_pending); |
9b2e4f18 | 159 | seq_printf(m, ",%d,%llx,%d,%lu", |
23b5c8fa | 160 | atomic_read(&rdp->dynticks->dynticks), |
64db4cff | 161 | rdp->dynticks->dynticks_nesting, |
23b5c8fa | 162 | rdp->dynticks->dynticks_nmi_nesting, |
64db4cff | 163 | rdp->dynticks_fqs); |
2036d94a | 164 | seq_printf(m, ",%lu", rdp->offline_fqs); |
486e2593 | 165 | seq_printf(m, ",%ld,%ld,\"%c%c%c%c\"", rdp->qlen_lazy, rdp->qlen, |
0ac3d136 PM |
166 | ".N"[rdp->nxttail[RCU_NEXT_READY_TAIL] != |
167 | rdp->nxttail[RCU_NEXT_TAIL]], | |
168 | ".R"[rdp->nxttail[RCU_WAIT_TAIL] != | |
169 | rdp->nxttail[RCU_NEXT_READY_TAIL]], | |
170 | ".W"[rdp->nxttail[RCU_DONE_TAIL] != | |
171 | rdp->nxttail[RCU_WAIT_TAIL]], | |
a46e0899 PM |
172 | ".D"[&rdp->nxtlist != rdp->nxttail[RCU_DONE_TAIL]]); |
173 | #ifdef CONFIG_RCU_BOOST | |
174 | seq_printf(m, ",%d,\"%c\"", | |
d71df90e PM |
175 | per_cpu(rcu_cpu_has_work, rdp->cpu), |
176 | convert_kthread_status(per_cpu(rcu_cpu_kthread_status, | |
a46e0899 PM |
177 | rdp->cpu))); |
178 | #endif /* #ifdef CONFIG_RCU_BOOST */ | |
179 | seq_printf(m, ",%ld", rdp->blimit); | |
269dcc1c PM |
180 | seq_printf(m, ",%lu,%lu,%lu\n", |
181 | rdp->n_cbs_invoked, rdp->n_cbs_orphaned, rdp->n_cbs_adopted); | |
64db4cff PM |
182 | } |
183 | ||
184 | static int show_rcudata_csv(struct seq_file *m, void *unused) | |
185 | { | |
c0cc962d PM |
186 | int cpu; |
187 | struct rcu_state *rsp; | |
188 | ||
e4cc1f22 | 189 | seq_puts(m, "\"CPU\",\"Online?\",\"c\",\"g\",\"pq\",\"pgp\",\"pq\","); |
23b5c8fa | 190 | seq_puts(m, "\"dt\",\"dt nesting\",\"dt NMI nesting\",\"df\","); |
2036d94a | 191 | seq_puts(m, "\"of\",\"qll\",\"ql\",\"qs\""); |
a46e0899 PM |
192 | #ifdef CONFIG_RCU_BOOST |
193 | seq_puts(m, "\"kt\",\"ktl\""); | |
194 | #endif /* #ifdef CONFIG_RCU_BOOST */ | |
195 | seq_puts(m, ",\"b\",\"ci\",\"co\",\"ca\"\n"); | |
c0cc962d PM |
196 | for_each_rcu_flavor(rsp) { |
197 | seq_printf(m, "\"%s:\"\n", rsp->name); | |
198 | for_each_possible_cpu(cpu) | |
199 | print_one_rcu_data_csv(m, per_cpu_ptr(rsp->rda, cpu)); | |
200 | } | |
64db4cff PM |
201 | return 0; |
202 | } | |
203 | ||
204 | static int rcudata_csv_open(struct inode *inode, struct file *file) | |
205 | { | |
206 | return single_open(file, show_rcudata_csv, NULL); | |
207 | } | |
208 | ||
9b2619af | 209 | static const struct file_operations rcudata_csv_fops = { |
64db4cff PM |
210 | .owner = THIS_MODULE, |
211 | .open = rcudata_csv_open, | |
212 | .read = seq_read, | |
213 | .llseek = seq_lseek, | |
214 | .release = single_release, | |
215 | }; | |
216 | ||
0ea1f2eb PM |
217 | #ifdef CONFIG_RCU_BOOST |
218 | ||
219 | static void print_one_rcu_node_boost(struct seq_file *m, struct rcu_node *rnp) | |
220 | { | |
5cf05ad7 | 221 | seq_printf(m, "%d:%d tasks=%c%c%c%c kt=%c ntb=%lu neb=%lu nnb=%lu ", |
0ea1f2eb PM |
222 | rnp->grplo, rnp->grphi, |
223 | "T."[list_empty(&rnp->blkd_tasks)], | |
224 | "N."[!rnp->gp_tasks], | |
225 | "E."[!rnp->exp_tasks], | |
226 | "B."[!rnp->boost_tasks], | |
d71df90e | 227 | convert_kthread_status(rnp->boost_kthread_status), |
0ea1f2eb | 228 | rnp->n_tasks_boosted, rnp->n_exp_boosts, |
5cf05ad7 PM |
229 | rnp->n_normal_boosts); |
230 | seq_printf(m, "j=%04x bt=%04x\n", | |
0ea1f2eb PM |
231 | (int)(jiffies & 0xffff), |
232 | (int)(rnp->boost_time & 0xffff)); | |
5cf05ad7 | 233 | seq_printf(m, " balk: nt=%lu egt=%lu bt=%lu nb=%lu ny=%lu nos=%lu\n", |
0ea1f2eb PM |
234 | rnp->n_balk_blkd_tasks, |
235 | rnp->n_balk_exp_gp_tasks, | |
236 | rnp->n_balk_boost_tasks, | |
237 | rnp->n_balk_notblocked, | |
238 | rnp->n_balk_notyet, | |
239 | rnp->n_balk_nos); | |
240 | } | |
241 | ||
242 | static int show_rcu_node_boost(struct seq_file *m, void *unused) | |
243 | { | |
244 | struct rcu_node *rnp; | |
245 | ||
246 | rcu_for_each_leaf_node(&rcu_preempt_state, rnp) | |
247 | print_one_rcu_node_boost(m, rnp); | |
248 | return 0; | |
249 | } | |
250 | ||
251 | static int rcu_node_boost_open(struct inode *inode, struct file *file) | |
252 | { | |
253 | return single_open(file, show_rcu_node_boost, NULL); | |
254 | } | |
255 | ||
256 | static const struct file_operations rcu_node_boost_fops = { | |
257 | .owner = THIS_MODULE, | |
258 | .open = rcu_node_boost_open, | |
259 | .read = seq_read, | |
260 | .llseek = seq_lseek, | |
261 | .release = single_release, | |
262 | }; | |
263 | ||
264 | /* | |
265 | * Create the rcuboost debugfs entry. Standard error return. | |
266 | */ | |
267 | static int rcu_boost_trace_create_file(struct dentry *rcudir) | |
268 | { | |
269 | return !debugfs_create_file("rcuboost", 0444, rcudir, NULL, | |
270 | &rcu_node_boost_fops); | |
271 | } | |
272 | ||
273 | #else /* #ifdef CONFIG_RCU_BOOST */ | |
274 | ||
275 | static int rcu_boost_trace_create_file(struct dentry *rcudir) | |
276 | { | |
277 | return 0; /* There cannot be an error if we didn't create it! */ | |
278 | } | |
279 | ||
280 | #endif /* #else #ifdef CONFIG_RCU_BOOST */ | |
281 | ||
64db4cff PM |
282 | static void print_one_rcu_state(struct seq_file *m, struct rcu_state *rsp) |
283 | { | |
20133cfc | 284 | unsigned long gpnum; |
64db4cff PM |
285 | int level = 0; |
286 | struct rcu_node *rnp; | |
287 | ||
3397e040 | 288 | gpnum = rsp->gpnum; |
5cf05ad7 | 289 | seq_printf(m, "%s: c=%lu g=%lu s=%d jfq=%ld j=%x ", |
c0cc962d | 290 | rsp->name, rsp->completed, gpnum, rsp->fqs_state, |
64db4cff | 291 | (long)(rsp->jiffies_force_qs - jiffies), |
5cf05ad7 PM |
292 | (int)(jiffies & 0xffff)); |
293 | seq_printf(m, "nfqs=%lu/nfqsng=%lu(%lu) fqlh=%lu oqlen=%ld/%ld\n", | |
64db4cff PM |
294 | rsp->n_force_qs, rsp->n_force_qs_ngp, |
295 | rsp->n_force_qs - rsp->n_force_qs_ngp, | |
b1420f1c | 296 | rsp->n_force_qs_lh, rsp->qlen_lazy, rsp->qlen); |
f885b7f2 | 297 | for (rnp = &rsp->node[0]; rnp - &rsp->node[0] < rcu_num_nodes; rnp++) { |
64db4cff PM |
298 | if (rnp->level != level) { |
299 | seq_puts(m, "\n"); | |
300 | level = rnp->level; | |
301 | } | |
12f5f524 | 302 | seq_printf(m, "%lx/%lx %c%c>%c %d:%d ^%d ", |
64db4cff | 303 | rnp->qsmask, rnp->qsmaskinit, |
12f5f524 PM |
304 | ".G"[rnp->gp_tasks != NULL], |
305 | ".E"[rnp->exp_tasks != NULL], | |
306 | ".T"[!list_empty(&rnp->blkd_tasks)], | |
64db4cff PM |
307 | rnp->grplo, rnp->grphi, rnp->grpnum); |
308 | } | |
309 | seq_puts(m, "\n"); | |
310 | } | |
311 | ||
312 | static int show_rcuhier(struct seq_file *m, void *unused) | |
313 | { | |
c0cc962d PM |
314 | struct rcu_state *rsp; |
315 | ||
316 | for_each_rcu_flavor(rsp) | |
317 | print_one_rcu_state(m, rsp); | |
64db4cff PM |
318 | return 0; |
319 | } | |
320 | ||
321 | static int rcuhier_open(struct inode *inode, struct file *file) | |
322 | { | |
323 | return single_open(file, show_rcuhier, NULL); | |
324 | } | |
325 | ||
9b2619af | 326 | static const struct file_operations rcuhier_fops = { |
64db4cff PM |
327 | .owner = THIS_MODULE, |
328 | .open = rcuhier_open, | |
329 | .read = seq_read, | |
330 | .llseek = seq_lseek, | |
331 | .release = single_release, | |
332 | }; | |
333 | ||
15ba0ba8 PM |
334 | static void show_one_rcugp(struct seq_file *m, struct rcu_state *rsp) |
335 | { | |
336 | unsigned long flags; | |
337 | unsigned long completed; | |
338 | unsigned long gpnum; | |
339 | unsigned long gpage; | |
340 | unsigned long gpmax; | |
341 | struct rcu_node *rnp = &rsp->node[0]; | |
342 | ||
343 | raw_spin_lock_irqsave(&rnp->lock, flags); | |
344 | completed = rsp->completed; | |
345 | gpnum = rsp->gpnum; | |
346 | if (rsp->completed == rsp->gpnum) | |
347 | gpage = 0; | |
348 | else | |
349 | gpage = jiffies - rsp->gp_start; | |
350 | gpmax = rsp->gp_max; | |
351 | raw_spin_unlock_irqrestore(&rnp->lock, flags); | |
352 | seq_printf(m, "%s: completed=%ld gpnum=%lu age=%ld max=%ld\n", | |
353 | rsp->name, completed, gpnum, gpage, gpmax); | |
354 | } | |
355 | ||
64db4cff PM |
356 | static int show_rcugp(struct seq_file *m, void *unused) |
357 | { | |
c0cc962d PM |
358 | struct rcu_state *rsp; |
359 | ||
360 | for_each_rcu_flavor(rsp) | |
361 | show_one_rcugp(m, rsp); | |
64db4cff PM |
362 | return 0; |
363 | } | |
364 | ||
365 | static int rcugp_open(struct inode *inode, struct file *file) | |
366 | { | |
367 | return single_open(file, show_rcugp, NULL); | |
368 | } | |
369 | ||
9b2619af | 370 | static const struct file_operations rcugp_fops = { |
64db4cff PM |
371 | .owner = THIS_MODULE, |
372 | .open = rcugp_open, | |
373 | .read = seq_read, | |
374 | .llseek = seq_lseek, | |
375 | .release = single_release, | |
376 | }; | |
377 | ||
7ba5c840 PM |
378 | static void print_one_rcu_pending(struct seq_file *m, struct rcu_data *rdp) |
379 | { | |
5cf05ad7 | 380 | seq_printf(m, "%3d%cnp=%ld ", |
7ba5c840 PM |
381 | rdp->cpu, |
382 | cpu_is_offline(rdp->cpu) ? '!' : ' ', | |
5cf05ad7 PM |
383 | rdp->n_rcu_pending); |
384 | seq_printf(m, "qsp=%ld rpq=%ld cbr=%ld cng=%ld ", | |
7ba5c840 | 385 | rdp->n_rp_qs_pending, |
d21670ac | 386 | rdp->n_rp_report_qs, |
7ba5c840 | 387 | rdp->n_rp_cb_ready, |
5cf05ad7 PM |
388 | rdp->n_rp_cpu_needs_gp); |
389 | seq_printf(m, "gpc=%ld gps=%ld nf=%ld nn=%ld\n", | |
7ba5c840 PM |
390 | rdp->n_rp_gp_completed, |
391 | rdp->n_rp_gp_started, | |
392 | rdp->n_rp_need_fqs, | |
393 | rdp->n_rp_need_nothing); | |
394 | } | |
395 | ||
c0cc962d | 396 | static int show_rcu_pending(struct seq_file *m, void *unused) |
7ba5c840 PM |
397 | { |
398 | int cpu; | |
399 | struct rcu_data *rdp; | |
c0cc962d PM |
400 | struct rcu_state *rsp; |
401 | ||
402 | for_each_rcu_flavor(rsp) { | |
403 | seq_printf(m, "%s:\n", rsp->name); | |
404 | for_each_possible_cpu(cpu) { | |
405 | rdp = per_cpu_ptr(rsp->rda, cpu); | |
406 | if (rdp->beenonline) | |
407 | print_one_rcu_pending(m, rdp); | |
408 | } | |
7ba5c840 | 409 | } |
7ba5c840 PM |
410 | return 0; |
411 | } | |
412 | ||
413 | static int rcu_pending_open(struct inode *inode, struct file *file) | |
414 | { | |
415 | return single_open(file, show_rcu_pending, NULL); | |
416 | } | |
417 | ||
9b2619af | 418 | static const struct file_operations rcu_pending_fops = { |
7ba5c840 PM |
419 | .owner = THIS_MODULE, |
420 | .open = rcu_pending_open, | |
421 | .read = seq_read, | |
422 | .llseek = seq_lseek, | |
423 | .release = single_release, | |
424 | }; | |
425 | ||
4a298656 PM |
426 | static int show_rcutorture(struct seq_file *m, void *unused) |
427 | { | |
428 | seq_printf(m, "rcutorture test sequence: %lu %s\n", | |
429 | rcutorture_testseq >> 1, | |
430 | (rcutorture_testseq & 0x1) ? "(test in progress)" : ""); | |
431 | seq_printf(m, "rcutorture update version number: %lu\n", | |
432 | rcutorture_vernum); | |
433 | return 0; | |
434 | } | |
435 | ||
436 | static int rcutorture_open(struct inode *inode, struct file *file) | |
437 | { | |
438 | return single_open(file, show_rcutorture, NULL); | |
439 | } | |
440 | ||
441 | static const struct file_operations rcutorture_fops = { | |
442 | .owner = THIS_MODULE, | |
443 | .open = rcutorture_open, | |
444 | .read = seq_read, | |
445 | .llseek = seq_lseek, | |
446 | .release = single_release, | |
447 | }; | |
448 | ||
7ba5c840 | 449 | static struct dentry *rcudir; |
7ba5c840 | 450 | |
deb7a418 | 451 | static int __init rcutree_trace_init(void) |
64db4cff | 452 | { |
22f00b69 PM |
453 | struct dentry *retval; |
454 | ||
64db4cff PM |
455 | rcudir = debugfs_create_dir("rcu", NULL); |
456 | if (!rcudir) | |
22f00b69 | 457 | goto free_out; |
64db4cff | 458 | |
d7e187c8 PM |
459 | retval = debugfs_create_file("rcubarrier", 0444, rcudir, |
460 | NULL, &rcubarrier_fops); | |
461 | if (!retval) | |
462 | goto free_out; | |
463 | ||
22f00b69 | 464 | retval = debugfs_create_file("rcudata", 0444, rcudir, |
64db4cff | 465 | NULL, &rcudata_fops); |
22f00b69 | 466 | if (!retval) |
64db4cff PM |
467 | goto free_out; |
468 | ||
22f00b69 | 469 | retval = debugfs_create_file("rcudata.csv", 0444, rcudir, |
64db4cff | 470 | NULL, &rcudata_csv_fops); |
22f00b69 | 471 | if (!retval) |
64db4cff PM |
472 | goto free_out; |
473 | ||
0ea1f2eb PM |
474 | if (rcu_boost_trace_create_file(rcudir)) |
475 | goto free_out; | |
476 | ||
22f00b69 PM |
477 | retval = debugfs_create_file("rcugp", 0444, rcudir, NULL, &rcugp_fops); |
478 | if (!retval) | |
64db4cff PM |
479 | goto free_out; |
480 | ||
22f00b69 | 481 | retval = debugfs_create_file("rcuhier", 0444, rcudir, |
64db4cff | 482 | NULL, &rcuhier_fops); |
22f00b69 | 483 | if (!retval) |
64db4cff | 484 | goto free_out; |
7ba5c840 | 485 | |
22f00b69 | 486 | retval = debugfs_create_file("rcu_pending", 0444, rcudir, |
7ba5c840 | 487 | NULL, &rcu_pending_fops); |
22f00b69 | 488 | if (!retval) |
7ba5c840 | 489 | goto free_out; |
4a298656 PM |
490 | |
491 | retval = debugfs_create_file("rcutorture", 0444, rcudir, | |
492 | NULL, &rcutorture_fops); | |
493 | if (!retval) | |
494 | goto free_out; | |
64db4cff PM |
495 | return 0; |
496 | free_out: | |
22f00b69 | 497 | debugfs_remove_recursive(rcudir); |
64db4cff PM |
498 | return 1; |
499 | } | |
500 | ||
deb7a418 | 501 | static void __exit rcutree_trace_cleanup(void) |
64db4cff | 502 | { |
22f00b69 | 503 | debugfs_remove_recursive(rcudir); |
64db4cff PM |
504 | } |
505 | ||
506 | ||
deb7a418 PM |
507 | module_init(rcutree_trace_init); |
508 | module_exit(rcutree_trace_cleanup); | |
64db4cff PM |
509 | |
510 | MODULE_AUTHOR("Paul E. McKenney"); | |
511 | MODULE_DESCRIPTION("Read-Copy Update tracing for hierarchical implementation"); | |
512 | MODULE_LICENSE("GPL"); |