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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 | ||
374b928e MW |
49 | static int r_open(struct inode *inode, struct file *file, |
50 | const struct seq_operations *op) | |
51 | { | |
52 | int ret = seq_open(file, op); | |
53 | if (!ret) { | |
54 | struct seq_file *m = (struct seq_file *)file->private_data; | |
55 | m->private = inode->i_private; | |
56 | } | |
57 | return ret; | |
58 | } | |
59 | ||
60 | static void *r_start(struct seq_file *m, loff_t *pos) | |
61 | { | |
62 | struct rcu_state *rsp = (struct rcu_state *)m->private; | |
63 | *pos = cpumask_next(*pos - 1, cpu_possible_mask); | |
64 | if ((*pos) < nr_cpu_ids) | |
65 | return per_cpu_ptr(rsp->rda, *pos); | |
66 | return NULL; | |
67 | } | |
68 | ||
69 | static void *r_next(struct seq_file *m, void *v, loff_t *pos) | |
70 | { | |
71 | (*pos)++; | |
72 | return r_start(m, pos); | |
73 | } | |
74 | ||
75 | static void r_stop(struct seq_file *m, void *v) | |
76 | { | |
77 | } | |
78 | ||
d7e187c8 PM |
79 | static int show_rcubarrier(struct seq_file *m, void *unused) |
80 | { | |
c0cc962d PM |
81 | struct rcu_state *rsp; |
82 | ||
83 | for_each_rcu_flavor(rsp) | |
1331e7a1 PM |
84 | seq_printf(m, "%s: bcc: %d nbd: %lu\n", |
85 | rsp->name, | |
c0cc962d PM |
86 | atomic_read(&rsp->barrier_cpu_count), |
87 | rsp->n_barrier_done); | |
d7e187c8 PM |
88 | return 0; |
89 | } | |
90 | ||
91 | static int rcubarrier_open(struct inode *inode, struct file *file) | |
92 | { | |
93 | return single_open(file, show_rcubarrier, NULL); | |
94 | } | |
95 | ||
96 | static const struct file_operations rcubarrier_fops = { | |
97 | .owner = THIS_MODULE, | |
98 | .open = rcubarrier_open, | |
99 | .read = seq_read, | |
100 | .llseek = seq_lseek, | |
101 | .release = single_release, | |
102 | }; | |
103 | ||
a46e0899 PM |
104 | #ifdef CONFIG_RCU_BOOST |
105 | ||
d71df90e PM |
106 | static char convert_kthread_status(unsigned int kthread_status) |
107 | { | |
108 | if (kthread_status > RCU_KTHREAD_MAX) | |
109 | return '?'; | |
15ba0ba8 | 110 | return "SRWOY"[kthread_status]; |
d71df90e PM |
111 | } |
112 | ||
a46e0899 PM |
113 | #endif /* #ifdef CONFIG_RCU_BOOST */ |
114 | ||
64db4cff PM |
115 | static void print_one_rcu_data(struct seq_file *m, struct rcu_data *rdp) |
116 | { | |
117 | if (!rdp->beenonline) | |
118 | return; | |
d7d6a11e | 119 | seq_printf(m, "%3d%cc=%lu g=%lu pq=%d qp=%d", |
64db4cff PM |
120 | rdp->cpu, |
121 | cpu_is_offline(rdp->cpu) ? '!' : ' ', | |
122 | rdp->completed, rdp->gpnum, | |
d7d6a11e | 123 | rdp->passed_quiesce, rdp->qs_pending); |
9b2e4f18 | 124 | seq_printf(m, " dt=%d/%llx/%d df=%lu", |
23b5c8fa | 125 | atomic_read(&rdp->dynticks->dynticks), |
64db4cff | 126 | rdp->dynticks->dynticks_nesting, |
23b5c8fa | 127 | rdp->dynticks->dynticks_nmi_nesting, |
64db4cff | 128 | rdp->dynticks_fqs); |
2036d94a | 129 | seq_printf(m, " of=%lu", rdp->offline_fqs); |
486e2593 PM |
130 | seq_printf(m, " ql=%ld/%ld qs=%c%c%c%c", |
131 | rdp->qlen_lazy, rdp->qlen, | |
0ac3d136 PM |
132 | ".N"[rdp->nxttail[RCU_NEXT_READY_TAIL] != |
133 | rdp->nxttail[RCU_NEXT_TAIL]], | |
134 | ".R"[rdp->nxttail[RCU_WAIT_TAIL] != | |
135 | rdp->nxttail[RCU_NEXT_READY_TAIL]], | |
136 | ".W"[rdp->nxttail[RCU_DONE_TAIL] != | |
137 | rdp->nxttail[RCU_WAIT_TAIL]], | |
a46e0899 PM |
138 | ".D"[&rdp->nxtlist != rdp->nxttail[RCU_DONE_TAIL]]); |
139 | #ifdef CONFIG_RCU_BOOST | |
62ab7072 | 140 | seq_printf(m, " kt=%d/%c ktl=%x", |
d71df90e PM |
141 | per_cpu(rcu_cpu_has_work, rdp->cpu), |
142 | convert_kthread_status(per_cpu(rcu_cpu_kthread_status, | |
143 | rdp->cpu)), | |
a46e0899 PM |
144 | per_cpu(rcu_cpu_kthread_loops, rdp->cpu) & 0xffff); |
145 | #endif /* #ifdef CONFIG_RCU_BOOST */ | |
146 | seq_printf(m, " b=%ld", rdp->blimit); | |
269dcc1c PM |
147 | seq_printf(m, " ci=%lu co=%lu ca=%lu\n", |
148 | rdp->n_cbs_invoked, rdp->n_cbs_orphaned, rdp->n_cbs_adopted); | |
64db4cff PM |
149 | } |
150 | ||
64db4cff PM |
151 | static int show_rcudata(struct seq_file *m, void *unused) |
152 | { | |
c0cc962d PM |
153 | int cpu; |
154 | struct rcu_state *rsp; | |
155 | ||
156 | for_each_rcu_flavor(rsp) { | |
157 | seq_printf(m, "%s:\n", rsp->name); | |
158 | for_each_possible_cpu(cpu) | |
159 | print_one_rcu_data(m, per_cpu_ptr(rsp->rda, cpu)); | |
160 | } | |
64db4cff PM |
161 | return 0; |
162 | } | |
163 | ||
164 | static int rcudata_open(struct inode *inode, struct file *file) | |
165 | { | |
166 | return single_open(file, show_rcudata, NULL); | |
167 | } | |
168 | ||
9b2619af | 169 | static const struct file_operations rcudata_fops = { |
64db4cff PM |
170 | .owner = THIS_MODULE, |
171 | .open = rcudata_open, | |
172 | .read = seq_read, | |
173 | .llseek = seq_lseek, | |
174 | .release = single_release, | |
175 | }; | |
176 | ||
878eda72 MW |
177 | static int new_show_rcudata(struct seq_file *m, void *v) |
178 | { | |
179 | print_one_rcu_data(m, (struct rcu_data *)v); | |
180 | return 0; | |
181 | } | |
182 | ||
183 | static const struct seq_operations new_rcudate_op = { | |
184 | .start = r_start, | |
185 | .next = r_next, | |
186 | .stop = r_stop, | |
187 | .show = new_show_rcudata, | |
188 | }; | |
189 | ||
190 | static int new_rcudata_open(struct inode *inode, struct file *file) | |
191 | { | |
192 | return r_open(inode, file, &new_rcudate_op); | |
193 | } | |
194 | ||
195 | static const struct file_operations new_rcudata_fops = { | |
196 | .owner = THIS_MODULE, | |
197 | .open = new_rcudata_open, | |
198 | .read = seq_read, | |
199 | .llseek = no_llseek, | |
200 | .release = seq_release, | |
201 | }; | |
202 | ||
64db4cff PM |
203 | static void print_one_rcu_data_csv(struct seq_file *m, struct rcu_data *rdp) |
204 | { | |
205 | if (!rdp->beenonline) | |
206 | return; | |
d7d6a11e | 207 | seq_printf(m, "%d,%s,%lu,%lu,%d,%d", |
64db4cff | 208 | rdp->cpu, |
5699ed8f | 209 | cpu_is_offline(rdp->cpu) ? "\"N\"" : "\"Y\"", |
64db4cff | 210 | rdp->completed, rdp->gpnum, |
d7d6a11e | 211 | rdp->passed_quiesce, rdp->qs_pending); |
9b2e4f18 | 212 | seq_printf(m, ",%d,%llx,%d,%lu", |
23b5c8fa | 213 | atomic_read(&rdp->dynticks->dynticks), |
64db4cff | 214 | rdp->dynticks->dynticks_nesting, |
23b5c8fa | 215 | rdp->dynticks->dynticks_nmi_nesting, |
64db4cff | 216 | rdp->dynticks_fqs); |
2036d94a | 217 | seq_printf(m, ",%lu", rdp->offline_fqs); |
486e2593 | 218 | seq_printf(m, ",%ld,%ld,\"%c%c%c%c\"", rdp->qlen_lazy, rdp->qlen, |
0ac3d136 PM |
219 | ".N"[rdp->nxttail[RCU_NEXT_READY_TAIL] != |
220 | rdp->nxttail[RCU_NEXT_TAIL]], | |
221 | ".R"[rdp->nxttail[RCU_WAIT_TAIL] != | |
222 | rdp->nxttail[RCU_NEXT_READY_TAIL]], | |
223 | ".W"[rdp->nxttail[RCU_DONE_TAIL] != | |
224 | rdp->nxttail[RCU_WAIT_TAIL]], | |
a46e0899 PM |
225 | ".D"[&rdp->nxtlist != rdp->nxttail[RCU_DONE_TAIL]]); |
226 | #ifdef CONFIG_RCU_BOOST | |
227 | seq_printf(m, ",%d,\"%c\"", | |
d71df90e PM |
228 | per_cpu(rcu_cpu_has_work, rdp->cpu), |
229 | convert_kthread_status(per_cpu(rcu_cpu_kthread_status, | |
a46e0899 PM |
230 | rdp->cpu))); |
231 | #endif /* #ifdef CONFIG_RCU_BOOST */ | |
232 | seq_printf(m, ",%ld", rdp->blimit); | |
269dcc1c PM |
233 | seq_printf(m, ",%lu,%lu,%lu\n", |
234 | rdp->n_cbs_invoked, rdp->n_cbs_orphaned, rdp->n_cbs_adopted); | |
64db4cff PM |
235 | } |
236 | ||
237 | static int show_rcudata_csv(struct seq_file *m, void *unused) | |
238 | { | |
c0cc962d PM |
239 | int cpu; |
240 | struct rcu_state *rsp; | |
241 | ||
d7d6a11e | 242 | seq_puts(m, "\"CPU\",\"Online?\",\"c\",\"g\",\"pq\",\"pq\","); |
23b5c8fa | 243 | seq_puts(m, "\"dt\",\"dt nesting\",\"dt NMI nesting\",\"df\","); |
2036d94a | 244 | seq_puts(m, "\"of\",\"qll\",\"ql\",\"qs\""); |
a46e0899 PM |
245 | #ifdef CONFIG_RCU_BOOST |
246 | seq_puts(m, "\"kt\",\"ktl\""); | |
247 | #endif /* #ifdef CONFIG_RCU_BOOST */ | |
248 | seq_puts(m, ",\"b\",\"ci\",\"co\",\"ca\"\n"); | |
c0cc962d PM |
249 | for_each_rcu_flavor(rsp) { |
250 | seq_printf(m, "\"%s:\"\n", rsp->name); | |
251 | for_each_possible_cpu(cpu) | |
252 | print_one_rcu_data_csv(m, per_cpu_ptr(rsp->rda, cpu)); | |
253 | } | |
64db4cff PM |
254 | return 0; |
255 | } | |
256 | ||
257 | static int rcudata_csv_open(struct inode *inode, struct file *file) | |
258 | { | |
259 | return single_open(file, show_rcudata_csv, NULL); | |
260 | } | |
261 | ||
9b2619af | 262 | static const struct file_operations rcudata_csv_fops = { |
64db4cff PM |
263 | .owner = THIS_MODULE, |
264 | .open = rcudata_csv_open, | |
265 | .read = seq_read, | |
266 | .llseek = seq_lseek, | |
267 | .release = single_release, | |
268 | }; | |
269 | ||
d29200ef MW |
270 | static int new_show_rcudata_csv(struct seq_file *m, void *v) |
271 | { | |
272 | struct rcu_data *rdp = (struct rcu_data *)v; | |
273 | if (cpumask_first(cpu_possible_mask) == rdp->cpu) { | |
274 | seq_puts(m, "\"CPU\",\"Online?\",\"c\",\"g\",\"pq\",\"pq\","); | |
275 | seq_puts(m, "\"dt\",\"dt nesting\",\"dt NMI nesting\",\"df\","); | |
276 | seq_puts(m, "\"of\",\"qll\",\"ql\",\"qs\""); | |
277 | #ifdef CONFIG_RCU_BOOST | |
278 | seq_puts(m, "\"kt\",\"ktl\""); | |
279 | #endif /* #ifdef CONFIG_RCU_BOOST */ | |
280 | seq_puts(m, ",\"b\",\"ci\",\"co\",\"ca\"\n"); | |
281 | } | |
282 | ||
283 | print_one_rcu_data_csv(m, rdp); | |
284 | return 0; | |
285 | } | |
286 | ||
287 | static const struct seq_operations new_rcudate_csv_op = { | |
288 | .start = r_start, | |
289 | .next = r_next, | |
290 | .stop = r_stop, | |
291 | .show = new_show_rcudata_csv, | |
292 | }; | |
293 | ||
294 | static int new_rcudata_csv_open(struct inode *inode, struct file *file) | |
295 | { | |
296 | return r_open(inode, file, &new_rcudate_csv_op); | |
297 | } | |
298 | ||
299 | static const struct file_operations new_rcudata_csv_fops = { | |
300 | .owner = THIS_MODULE, | |
301 | .open = new_rcudata_csv_open, | |
302 | .read = seq_read, | |
303 | .llseek = no_llseek, | |
304 | .release = seq_release, | |
305 | }; | |
306 | ||
0ea1f2eb PM |
307 | #ifdef CONFIG_RCU_BOOST |
308 | ||
309 | static void print_one_rcu_node_boost(struct seq_file *m, struct rcu_node *rnp) | |
310 | { | |
5cf05ad7 | 311 | seq_printf(m, "%d:%d tasks=%c%c%c%c kt=%c ntb=%lu neb=%lu nnb=%lu ", |
0ea1f2eb PM |
312 | rnp->grplo, rnp->grphi, |
313 | "T."[list_empty(&rnp->blkd_tasks)], | |
314 | "N."[!rnp->gp_tasks], | |
315 | "E."[!rnp->exp_tasks], | |
316 | "B."[!rnp->boost_tasks], | |
d71df90e | 317 | convert_kthread_status(rnp->boost_kthread_status), |
0ea1f2eb | 318 | rnp->n_tasks_boosted, rnp->n_exp_boosts, |
5cf05ad7 PM |
319 | rnp->n_normal_boosts); |
320 | seq_printf(m, "j=%04x bt=%04x\n", | |
0ea1f2eb PM |
321 | (int)(jiffies & 0xffff), |
322 | (int)(rnp->boost_time & 0xffff)); | |
5cf05ad7 | 323 | seq_printf(m, " balk: nt=%lu egt=%lu bt=%lu nb=%lu ny=%lu nos=%lu\n", |
0ea1f2eb PM |
324 | rnp->n_balk_blkd_tasks, |
325 | rnp->n_balk_exp_gp_tasks, | |
326 | rnp->n_balk_boost_tasks, | |
327 | rnp->n_balk_notblocked, | |
328 | rnp->n_balk_notyet, | |
329 | rnp->n_balk_nos); | |
330 | } | |
331 | ||
332 | static int show_rcu_node_boost(struct seq_file *m, void *unused) | |
333 | { | |
334 | struct rcu_node *rnp; | |
335 | ||
336 | rcu_for_each_leaf_node(&rcu_preempt_state, rnp) | |
337 | print_one_rcu_node_boost(m, rnp); | |
338 | return 0; | |
339 | } | |
340 | ||
341 | static int rcu_node_boost_open(struct inode *inode, struct file *file) | |
342 | { | |
343 | return single_open(file, show_rcu_node_boost, NULL); | |
344 | } | |
345 | ||
346 | static const struct file_operations rcu_node_boost_fops = { | |
347 | .owner = THIS_MODULE, | |
348 | .open = rcu_node_boost_open, | |
349 | .read = seq_read, | |
350 | .llseek = seq_lseek, | |
351 | .release = single_release, | |
352 | }; | |
353 | ||
354 | /* | |
355 | * Create the rcuboost debugfs entry. Standard error return. | |
356 | */ | |
357 | static int rcu_boost_trace_create_file(struct dentry *rcudir) | |
358 | { | |
359 | return !debugfs_create_file("rcuboost", 0444, rcudir, NULL, | |
360 | &rcu_node_boost_fops); | |
361 | } | |
362 | ||
363 | #else /* #ifdef CONFIG_RCU_BOOST */ | |
364 | ||
365 | static int rcu_boost_trace_create_file(struct dentry *rcudir) | |
366 | { | |
367 | return 0; /* There cannot be an error if we didn't create it! */ | |
368 | } | |
369 | ||
370 | #endif /* #else #ifdef CONFIG_RCU_BOOST */ | |
371 | ||
64db4cff PM |
372 | static void print_one_rcu_state(struct seq_file *m, struct rcu_state *rsp) |
373 | { | |
20133cfc | 374 | unsigned long gpnum; |
64db4cff PM |
375 | int level = 0; |
376 | struct rcu_node *rnp; | |
377 | ||
3397e040 | 378 | gpnum = rsp->gpnum; |
5cf05ad7 | 379 | seq_printf(m, "%s: c=%lu g=%lu s=%d jfq=%ld j=%x ", |
c0cc962d | 380 | rsp->name, rsp->completed, gpnum, rsp->fqs_state, |
64db4cff | 381 | (long)(rsp->jiffies_force_qs - jiffies), |
5cf05ad7 PM |
382 | (int)(jiffies & 0xffff)); |
383 | seq_printf(m, "nfqs=%lu/nfqsng=%lu(%lu) fqlh=%lu oqlen=%ld/%ld\n", | |
64db4cff PM |
384 | rsp->n_force_qs, rsp->n_force_qs_ngp, |
385 | rsp->n_force_qs - rsp->n_force_qs_ngp, | |
b1420f1c | 386 | rsp->n_force_qs_lh, rsp->qlen_lazy, rsp->qlen); |
f885b7f2 | 387 | for (rnp = &rsp->node[0]; rnp - &rsp->node[0] < rcu_num_nodes; rnp++) { |
64db4cff PM |
388 | if (rnp->level != level) { |
389 | seq_puts(m, "\n"); | |
390 | level = rnp->level; | |
391 | } | |
12f5f524 | 392 | seq_printf(m, "%lx/%lx %c%c>%c %d:%d ^%d ", |
64db4cff | 393 | rnp->qsmask, rnp->qsmaskinit, |
12f5f524 PM |
394 | ".G"[rnp->gp_tasks != NULL], |
395 | ".E"[rnp->exp_tasks != NULL], | |
396 | ".T"[!list_empty(&rnp->blkd_tasks)], | |
64db4cff PM |
397 | rnp->grplo, rnp->grphi, rnp->grpnum); |
398 | } | |
399 | seq_puts(m, "\n"); | |
400 | } | |
401 | ||
402 | static int show_rcuhier(struct seq_file *m, void *unused) | |
403 | { | |
c0cc962d PM |
404 | struct rcu_state *rsp; |
405 | ||
406 | for_each_rcu_flavor(rsp) | |
407 | print_one_rcu_state(m, rsp); | |
64db4cff PM |
408 | return 0; |
409 | } | |
410 | ||
411 | static int rcuhier_open(struct inode *inode, struct file *file) | |
412 | { | |
413 | return single_open(file, show_rcuhier, NULL); | |
414 | } | |
415 | ||
9b2619af | 416 | static const struct file_operations rcuhier_fops = { |
64db4cff PM |
417 | .owner = THIS_MODULE, |
418 | .open = rcuhier_open, | |
419 | .read = seq_read, | |
420 | .llseek = seq_lseek, | |
421 | .release = single_release, | |
422 | }; | |
423 | ||
15ba0ba8 PM |
424 | static void show_one_rcugp(struct seq_file *m, struct rcu_state *rsp) |
425 | { | |
426 | unsigned long flags; | |
427 | unsigned long completed; | |
428 | unsigned long gpnum; | |
429 | unsigned long gpage; | |
430 | unsigned long gpmax; | |
431 | struct rcu_node *rnp = &rsp->node[0]; | |
432 | ||
433 | raw_spin_lock_irqsave(&rnp->lock, flags); | |
434 | completed = rsp->completed; | |
435 | gpnum = rsp->gpnum; | |
436 | if (rsp->completed == rsp->gpnum) | |
437 | gpage = 0; | |
438 | else | |
439 | gpage = jiffies - rsp->gp_start; | |
440 | gpmax = rsp->gp_max; | |
441 | raw_spin_unlock_irqrestore(&rnp->lock, flags); | |
442 | seq_printf(m, "%s: completed=%ld gpnum=%lu age=%ld max=%ld\n", | |
443 | rsp->name, completed, gpnum, gpage, gpmax); | |
444 | } | |
445 | ||
64db4cff PM |
446 | static int show_rcugp(struct seq_file *m, void *unused) |
447 | { | |
c0cc962d PM |
448 | struct rcu_state *rsp; |
449 | ||
450 | for_each_rcu_flavor(rsp) | |
451 | show_one_rcugp(m, rsp); | |
64db4cff PM |
452 | return 0; |
453 | } | |
454 | ||
455 | static int rcugp_open(struct inode *inode, struct file *file) | |
456 | { | |
457 | return single_open(file, show_rcugp, NULL); | |
458 | } | |
459 | ||
9b2619af | 460 | static const struct file_operations rcugp_fops = { |
64db4cff PM |
461 | .owner = THIS_MODULE, |
462 | .open = rcugp_open, | |
463 | .read = seq_read, | |
464 | .llseek = seq_lseek, | |
465 | .release = single_release, | |
466 | }; | |
467 | ||
7ba5c840 PM |
468 | static void print_one_rcu_pending(struct seq_file *m, struct rcu_data *rdp) |
469 | { | |
51d0f16d MW |
470 | if (!rdp->beenonline) |
471 | return; | |
5cf05ad7 | 472 | seq_printf(m, "%3d%cnp=%ld ", |
7ba5c840 PM |
473 | rdp->cpu, |
474 | cpu_is_offline(rdp->cpu) ? '!' : ' ', | |
5cf05ad7 PM |
475 | rdp->n_rcu_pending); |
476 | seq_printf(m, "qsp=%ld rpq=%ld cbr=%ld cng=%ld ", | |
7ba5c840 | 477 | rdp->n_rp_qs_pending, |
d21670ac | 478 | rdp->n_rp_report_qs, |
7ba5c840 | 479 | rdp->n_rp_cb_ready, |
5cf05ad7 | 480 | rdp->n_rp_cpu_needs_gp); |
4605c014 | 481 | seq_printf(m, "gpc=%ld gps=%ld nn=%ld\n", |
7ba5c840 PM |
482 | rdp->n_rp_gp_completed, |
483 | rdp->n_rp_gp_started, | |
7ba5c840 PM |
484 | rdp->n_rp_need_nothing); |
485 | } | |
486 | ||
c0cc962d | 487 | static int show_rcu_pending(struct seq_file *m, void *unused) |
7ba5c840 PM |
488 | { |
489 | int cpu; | |
c0cc962d PM |
490 | struct rcu_state *rsp; |
491 | ||
492 | for_each_rcu_flavor(rsp) { | |
493 | seq_printf(m, "%s:\n", rsp->name); | |
51d0f16d MW |
494 | for_each_possible_cpu(cpu) |
495 | print_one_rcu_pending(m, per_cpu_ptr(rsp->rda, cpu)); | |
7ba5c840 | 496 | } |
7ba5c840 PM |
497 | return 0; |
498 | } | |
499 | ||
500 | static int rcu_pending_open(struct inode *inode, struct file *file) | |
501 | { | |
502 | return single_open(file, show_rcu_pending, NULL); | |
503 | } | |
504 | ||
9b2619af | 505 | static const struct file_operations rcu_pending_fops = { |
7ba5c840 PM |
506 | .owner = THIS_MODULE, |
507 | .open = rcu_pending_open, | |
508 | .read = seq_read, | |
509 | .llseek = seq_lseek, | |
510 | .release = single_release, | |
511 | }; | |
512 | ||
51d0f16d MW |
513 | static int new_show_rcu_pending(struct seq_file *m, void *v) |
514 | { | |
515 | print_one_rcu_pending(m, (struct rcu_data *)v); | |
516 | return 0; | |
517 | } | |
518 | ||
519 | static const struct seq_operations new_rcu_pending_op = { | |
520 | .start = r_start, | |
521 | .next = r_next, | |
522 | .stop = r_stop, | |
523 | .show = new_show_rcu_pending, | |
524 | }; | |
525 | ||
526 | static int new_rcu_pending_open(struct inode *inode, struct file *file) | |
527 | { | |
528 | return r_open(inode, file, &new_rcu_pending_op); | |
529 | } | |
530 | ||
531 | static const struct file_operations new_rcu_pending_fops = { | |
532 | .owner = THIS_MODULE, | |
533 | .open = new_rcu_pending_open, | |
534 | .read = seq_read, | |
535 | .llseek = no_llseek, | |
536 | .release = seq_release, | |
537 | }; | |
538 | ||
4a298656 PM |
539 | static int show_rcutorture(struct seq_file *m, void *unused) |
540 | { | |
541 | seq_printf(m, "rcutorture test sequence: %lu %s\n", | |
542 | rcutorture_testseq >> 1, | |
543 | (rcutorture_testseq & 0x1) ? "(test in progress)" : ""); | |
544 | seq_printf(m, "rcutorture update version number: %lu\n", | |
545 | rcutorture_vernum); | |
546 | return 0; | |
547 | } | |
548 | ||
549 | static int rcutorture_open(struct inode *inode, struct file *file) | |
550 | { | |
551 | return single_open(file, show_rcutorture, NULL); | |
552 | } | |
553 | ||
554 | static const struct file_operations rcutorture_fops = { | |
555 | .owner = THIS_MODULE, | |
556 | .open = rcutorture_open, | |
557 | .read = seq_read, | |
558 | .llseek = seq_lseek, | |
559 | .release = single_release, | |
560 | }; | |
561 | ||
7ba5c840 | 562 | static struct dentry *rcudir; |
7ba5c840 | 563 | |
deb7a418 | 564 | static int __init rcutree_trace_init(void) |
64db4cff | 565 | { |
573bcd40 | 566 | struct rcu_state *rsp; |
22f00b69 | 567 | struct dentry *retval; |
573bcd40 | 568 | struct dentry *rspdir; |
22f00b69 | 569 | |
64db4cff PM |
570 | rcudir = debugfs_create_dir("rcu", NULL); |
571 | if (!rcudir) | |
22f00b69 | 572 | goto free_out; |
64db4cff | 573 | |
573bcd40 MW |
574 | for_each_rcu_flavor(rsp) { |
575 | rspdir = debugfs_create_dir(rsp->name, rcudir); | |
576 | if (!rspdir) | |
577 | goto free_out; | |
878eda72 MW |
578 | |
579 | retval = debugfs_create_file("rcudata", 0444, | |
580 | rspdir, rsp, &new_rcudata_fops); | |
581 | if (!retval) | |
582 | goto free_out; | |
d29200ef MW |
583 | |
584 | retval = debugfs_create_file("rcudata.csv", 0444, | |
585 | rspdir, rsp, &new_rcudata_csv_fops); | |
586 | if (!retval) | |
587 | goto free_out; | |
51d0f16d MW |
588 | |
589 | retval = debugfs_create_file("rcu_pending", 0444, | |
590 | rspdir, rsp, &new_rcu_pending_fops); | |
591 | if (!retval) | |
592 | goto free_out; | |
573bcd40 MW |
593 | } |
594 | ||
d7e187c8 PM |
595 | retval = debugfs_create_file("rcubarrier", 0444, rcudir, |
596 | NULL, &rcubarrier_fops); | |
597 | if (!retval) | |
598 | goto free_out; | |
599 | ||
22f00b69 | 600 | retval = debugfs_create_file("rcudata", 0444, rcudir, |
64db4cff | 601 | NULL, &rcudata_fops); |
22f00b69 | 602 | if (!retval) |
64db4cff PM |
603 | goto free_out; |
604 | ||
22f00b69 | 605 | retval = debugfs_create_file("rcudata.csv", 0444, rcudir, |
64db4cff | 606 | NULL, &rcudata_csv_fops); |
22f00b69 | 607 | if (!retval) |
64db4cff PM |
608 | goto free_out; |
609 | ||
0ea1f2eb PM |
610 | if (rcu_boost_trace_create_file(rcudir)) |
611 | goto free_out; | |
612 | ||
22f00b69 PM |
613 | retval = debugfs_create_file("rcugp", 0444, rcudir, NULL, &rcugp_fops); |
614 | if (!retval) | |
64db4cff PM |
615 | goto free_out; |
616 | ||
22f00b69 | 617 | retval = debugfs_create_file("rcuhier", 0444, rcudir, |
64db4cff | 618 | NULL, &rcuhier_fops); |
22f00b69 | 619 | if (!retval) |
64db4cff | 620 | goto free_out; |
7ba5c840 | 621 | |
22f00b69 | 622 | retval = debugfs_create_file("rcu_pending", 0444, rcudir, |
7ba5c840 | 623 | NULL, &rcu_pending_fops); |
22f00b69 | 624 | if (!retval) |
7ba5c840 | 625 | goto free_out; |
4a298656 PM |
626 | |
627 | retval = debugfs_create_file("rcutorture", 0444, rcudir, | |
628 | NULL, &rcutorture_fops); | |
629 | if (!retval) | |
630 | goto free_out; | |
64db4cff PM |
631 | return 0; |
632 | free_out: | |
22f00b69 | 633 | debugfs_remove_recursive(rcudir); |
64db4cff PM |
634 | return 1; |
635 | } | |
636 | ||
deb7a418 | 637 | static void __exit rcutree_trace_cleanup(void) |
64db4cff | 638 | { |
22f00b69 | 639 | debugfs_remove_recursive(rcudir); |
64db4cff PM |
640 | } |
641 | ||
642 | ||
deb7a418 PM |
643 | module_init(rcutree_trace_init); |
644 | module_exit(rcutree_trace_cleanup); | |
64db4cff PM |
645 | |
646 | MODULE_AUTHOR("Paul E. McKenney"); | |
647 | MODULE_DESCRIPTION("Read-Copy Update tracing for hierarchical implementation"); | |
648 | MODULE_LICENSE("GPL"); |