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2309e9e0 SM |
1 | /* -*- mode: c; c-basic-offset: 8; -*- |
2 | * vim: noexpandtab sw=8 ts=8 sts=0: | |
3 | * | |
4 | * netdebug.c | |
5 | * | |
6 | * debug functionality for o2net | |
7 | * | |
8 | * Copyright (C) 2005, 2008 Oracle. All rights reserved. | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or | |
11 | * modify it under the terms of the GNU General Public | |
12 | * License as published by the Free Software Foundation; either | |
13 | * version 2 of the License, or (at your option) any later version. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, | |
16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
18 | * General Public License for more details. | |
19 | * | |
20 | * You should have received a copy of the GNU General Public | |
21 | * License along with this program; if not, write to the | |
22 | * Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
23 | * Boston, MA 021110-1307, USA. | |
24 | * | |
25 | */ | |
26 | ||
27 | #ifdef CONFIG_DEBUG_FS | |
28 | ||
29 | #include <linux/module.h> | |
30 | #include <linux/types.h> | |
31 | #include <linux/slab.h> | |
32 | #include <linux/idr.h> | |
33 | #include <linux/kref.h> | |
34 | #include <linux/seq_file.h> | |
35 | #include <linux/debugfs.h> | |
36 | ||
37 | #include <linux/uaccess.h> | |
38 | ||
39 | #include "tcp.h" | |
40 | #include "nodemanager.h" | |
41 | #define MLOG_MASK_PREFIX ML_TCP | |
42 | #include "masklog.h" | |
43 | ||
44 | #include "tcp_internal.h" | |
45 | ||
46 | #define O2NET_DEBUG_DIR "o2net" | |
47 | #define SC_DEBUG_NAME "sock_containers" | |
48 | #define NST_DEBUG_NAME "send_tracking" | |
db02754c | 49 | #define STATS_DEBUG_NAME "stats" |
3ba169cc | 50 | #define NODES_DEBUG_NAME "connected_nodes" |
db02754c SM |
51 | |
52 | #define SHOW_SOCK_CONTAINERS 0 | |
53 | #define SHOW_SOCK_STATS 1 | |
2309e9e0 SM |
54 | |
55 | static struct dentry *o2net_dentry; | |
56 | static struct dentry *sc_dentry; | |
57 | static struct dentry *nst_dentry; | |
db02754c | 58 | static struct dentry *stats_dentry; |
3ba169cc | 59 | static struct dentry *nodes_dentry; |
2309e9e0 SM |
60 | |
61 | static DEFINE_SPINLOCK(o2net_debug_lock); | |
62 | ||
63 | static LIST_HEAD(sock_containers); | |
64 | static LIST_HEAD(send_tracking); | |
65 | ||
66 | void o2net_debug_add_nst(struct o2net_send_tracking *nst) | |
67 | { | |
68 | spin_lock(&o2net_debug_lock); | |
69 | list_add(&nst->st_net_debug_item, &send_tracking); | |
70 | spin_unlock(&o2net_debug_lock); | |
71 | } | |
72 | ||
73 | void o2net_debug_del_nst(struct o2net_send_tracking *nst) | |
74 | { | |
75 | spin_lock(&o2net_debug_lock); | |
76 | if (!list_empty(&nst->st_net_debug_item)) | |
77 | list_del_init(&nst->st_net_debug_item); | |
78 | spin_unlock(&o2net_debug_lock); | |
79 | } | |
80 | ||
81 | static struct o2net_send_tracking | |
82 | *next_nst(struct o2net_send_tracking *nst_start) | |
83 | { | |
84 | struct o2net_send_tracking *nst, *ret = NULL; | |
85 | ||
86 | assert_spin_locked(&o2net_debug_lock); | |
87 | ||
88 | list_for_each_entry(nst, &nst_start->st_net_debug_item, | |
89 | st_net_debug_item) { | |
90 | /* discover the head of the list */ | |
91 | if (&nst->st_net_debug_item == &send_tracking) | |
92 | break; | |
93 | ||
94 | /* use st_task to detect real nsts in the list */ | |
95 | if (nst->st_task != NULL) { | |
96 | ret = nst; | |
97 | break; | |
98 | } | |
99 | } | |
100 | ||
101 | return ret; | |
102 | } | |
103 | ||
104 | static void *nst_seq_start(struct seq_file *seq, loff_t *pos) | |
105 | { | |
106 | struct o2net_send_tracking *nst, *dummy_nst = seq->private; | |
107 | ||
108 | spin_lock(&o2net_debug_lock); | |
109 | nst = next_nst(dummy_nst); | |
110 | spin_unlock(&o2net_debug_lock); | |
111 | ||
112 | return nst; | |
113 | } | |
114 | ||
115 | static void *nst_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
116 | { | |
117 | struct o2net_send_tracking *nst, *dummy_nst = seq->private; | |
118 | ||
119 | spin_lock(&o2net_debug_lock); | |
120 | nst = next_nst(dummy_nst); | |
121 | list_del_init(&dummy_nst->st_net_debug_item); | |
122 | if (nst) | |
123 | list_add(&dummy_nst->st_net_debug_item, | |
124 | &nst->st_net_debug_item); | |
125 | spin_unlock(&o2net_debug_lock); | |
126 | ||
127 | return nst; /* unused, just needs to be null when done */ | |
128 | } | |
129 | ||
130 | static int nst_seq_show(struct seq_file *seq, void *v) | |
131 | { | |
132 | struct o2net_send_tracking *nst, *dummy_nst = seq->private; | |
3f9c14fa SM |
133 | ktime_t now; |
134 | s64 sock, send, status; | |
2309e9e0 SM |
135 | |
136 | spin_lock(&o2net_debug_lock); | |
137 | nst = next_nst(dummy_nst); | |
cc548166 DC |
138 | if (!nst) |
139 | goto out; | |
2309e9e0 | 140 | |
3f9c14fa SM |
141 | now = ktime_get(); |
142 | sock = ktime_to_us(ktime_sub(now, nst->st_sock_time)); | |
143 | send = ktime_to_us(ktime_sub(now, nst->st_send_time)); | |
144 | status = ktime_to_us(ktime_sub(now, nst->st_status_time)); | |
145 | ||
cc548166 DC |
146 | /* get_task_comm isn't exported. oh well. */ |
147 | seq_printf(seq, "%p:\n" | |
148 | " pid: %lu\n" | |
149 | " tgid: %lu\n" | |
150 | " process name: %s\n" | |
151 | " node: %u\n" | |
152 | " sc: %p\n" | |
153 | " message id: %d\n" | |
154 | " message type: %u\n" | |
155 | " message key: 0x%08x\n" | |
156 | " sock acquiry: %lld usecs ago\n" | |
157 | " send start: %lld usecs ago\n" | |
158 | " wait start: %lld usecs ago\n", | |
159 | nst, (unsigned long)task_pid_nr(nst->st_task), | |
160 | (unsigned long)nst->st_task->tgid, | |
161 | nst->st_task->comm, nst->st_node, | |
162 | nst->st_sc, nst->st_id, nst->st_msg_type, | |
163 | nst->st_msg_key, | |
164 | (long long)sock, | |
165 | (long long)send, | |
166 | (long long)status); | |
2309e9e0 | 167 | |
cc548166 | 168 | out: |
2309e9e0 SM |
169 | spin_unlock(&o2net_debug_lock); |
170 | ||
171 | return 0; | |
172 | } | |
173 | ||
174 | static void nst_seq_stop(struct seq_file *seq, void *v) | |
175 | { | |
176 | } | |
177 | ||
88e9d34c | 178 | static const struct seq_operations nst_seq_ops = { |
2309e9e0 SM |
179 | .start = nst_seq_start, |
180 | .next = nst_seq_next, | |
181 | .stop = nst_seq_stop, | |
182 | .show = nst_seq_show, | |
183 | }; | |
184 | ||
185 | static int nst_fop_open(struct inode *inode, struct file *file) | |
186 | { | |
187 | struct o2net_send_tracking *dummy_nst; | |
2309e9e0 | 188 | |
f3288338 RJ |
189 | dummy_nst = __seq_open_private(file, &nst_seq_ops, sizeof(*dummy_nst)); |
190 | if (!dummy_nst) | |
191 | return -ENOMEM; | |
2309e9e0 SM |
192 | o2net_debug_add_nst(dummy_nst); |
193 | ||
f3288338 | 194 | return 0; |
2309e9e0 SM |
195 | } |
196 | ||
197 | static int nst_fop_release(struct inode *inode, struct file *file) | |
198 | { | |
199 | struct seq_file *seq = file->private_data; | |
200 | struct o2net_send_tracking *dummy_nst = seq->private; | |
201 | ||
202 | o2net_debug_del_nst(dummy_nst); | |
203 | return seq_release_private(inode, file); | |
204 | } | |
205 | ||
828c0950 | 206 | static const struct file_operations nst_seq_fops = { |
2309e9e0 SM |
207 | .open = nst_fop_open, |
208 | .read = seq_read, | |
209 | .llseek = seq_lseek, | |
210 | .release = nst_fop_release, | |
211 | }; | |
212 | ||
213 | void o2net_debug_add_sc(struct o2net_sock_container *sc) | |
214 | { | |
215 | spin_lock(&o2net_debug_lock); | |
216 | list_add(&sc->sc_net_debug_item, &sock_containers); | |
217 | spin_unlock(&o2net_debug_lock); | |
218 | } | |
219 | ||
220 | void o2net_debug_del_sc(struct o2net_sock_container *sc) | |
221 | { | |
222 | spin_lock(&o2net_debug_lock); | |
223 | list_del_init(&sc->sc_net_debug_item); | |
224 | spin_unlock(&o2net_debug_lock); | |
225 | } | |
226 | ||
db02754c SM |
227 | struct o2net_sock_debug { |
228 | int dbg_ctxt; | |
229 | struct o2net_sock_container *dbg_sock; | |
230 | }; | |
231 | ||
2309e9e0 SM |
232 | static struct o2net_sock_container |
233 | *next_sc(struct o2net_sock_container *sc_start) | |
234 | { | |
235 | struct o2net_sock_container *sc, *ret = NULL; | |
236 | ||
237 | assert_spin_locked(&o2net_debug_lock); | |
238 | ||
239 | list_for_each_entry(sc, &sc_start->sc_net_debug_item, | |
240 | sc_net_debug_item) { | |
241 | /* discover the head of the list miscast as a sc */ | |
242 | if (&sc->sc_net_debug_item == &sock_containers) | |
243 | break; | |
244 | ||
245 | /* use sc_page to detect real scs in the list */ | |
246 | if (sc->sc_page != NULL) { | |
247 | ret = sc; | |
248 | break; | |
249 | } | |
250 | } | |
251 | ||
252 | return ret; | |
253 | } | |
254 | ||
255 | static void *sc_seq_start(struct seq_file *seq, loff_t *pos) | |
256 | { | |
db02754c SM |
257 | struct o2net_sock_debug *sd = seq->private; |
258 | struct o2net_sock_container *sc, *dummy_sc = sd->dbg_sock; | |
2309e9e0 SM |
259 | |
260 | spin_lock(&o2net_debug_lock); | |
261 | sc = next_sc(dummy_sc); | |
262 | spin_unlock(&o2net_debug_lock); | |
263 | ||
264 | return sc; | |
265 | } | |
266 | ||
267 | static void *sc_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
268 | { | |
db02754c SM |
269 | struct o2net_sock_debug *sd = seq->private; |
270 | struct o2net_sock_container *sc, *dummy_sc = sd->dbg_sock; | |
2309e9e0 SM |
271 | |
272 | spin_lock(&o2net_debug_lock); | |
273 | sc = next_sc(dummy_sc); | |
274 | list_del_init(&dummy_sc->sc_net_debug_item); | |
275 | if (sc) | |
276 | list_add(&dummy_sc->sc_net_debug_item, &sc->sc_net_debug_item); | |
277 | spin_unlock(&o2net_debug_lock); | |
278 | ||
279 | return sc; /* unused, just needs to be null when done */ | |
280 | } | |
281 | ||
db02754c SM |
282 | #ifdef CONFIG_OCFS2_FS_STATS |
283 | # define sc_send_count(_s) ((_s)->sc_send_count) | |
284 | # define sc_recv_count(_s) ((_s)->sc_recv_count) | |
285 | # define sc_tv_acquiry_total_ns(_s) (ktime_to_ns((_s)->sc_tv_acquiry_total)) | |
286 | # define sc_tv_send_total_ns(_s) (ktime_to_ns((_s)->sc_tv_send_total)) | |
287 | # define sc_tv_status_total_ns(_s) (ktime_to_ns((_s)->sc_tv_status_total)) | |
288 | # define sc_tv_process_total_ns(_s) (ktime_to_ns((_s)->sc_tv_process_total)) | |
289 | #else | |
290 | # define sc_send_count(_s) (0U) | |
291 | # define sc_recv_count(_s) (0U) | |
292 | # define sc_tv_acquiry_total_ns(_s) (0LL) | |
293 | # define sc_tv_send_total_ns(_s) (0LL) | |
294 | # define sc_tv_status_total_ns(_s) (0LL) | |
295 | # define sc_tv_process_total_ns(_s) (0LL) | |
296 | #endif | |
297 | ||
298 | /* So that debugfs.ocfs2 can determine which format is being used */ | |
299 | #define O2NET_STATS_STR_VERSION 1 | |
300 | static void sc_show_sock_stats(struct seq_file *seq, | |
301 | struct o2net_sock_container *sc) | |
2309e9e0 | 302 | { |
db02754c SM |
303 | if (!sc) |
304 | return; | |
305 | ||
306 | seq_printf(seq, "%d,%u,%lu,%lld,%lld,%lld,%lu,%lld\n", O2NET_STATS_STR_VERSION, | |
307 | sc->sc_node->nd_num, (unsigned long)sc_send_count(sc), | |
308 | (long long)sc_tv_acquiry_total_ns(sc), | |
309 | (long long)sc_tv_send_total_ns(sc), | |
310 | (long long)sc_tv_status_total_ns(sc), | |
311 | (unsigned long)sc_recv_count(sc), | |
312 | (long long)sc_tv_process_total_ns(sc)); | |
313 | } | |
2309e9e0 | 314 | |
db02754c SM |
315 | static void sc_show_sock_container(struct seq_file *seq, |
316 | struct o2net_sock_container *sc) | |
317 | { | |
318 | struct inet_sock *inet = NULL; | |
319 | __be32 saddr = 0, daddr = 0; | |
320 | __be16 sport = 0, dport = 0; | |
321 | ||
322 | if (!sc) | |
323 | return; | |
324 | ||
325 | if (sc->sc_sock) { | |
326 | inet = inet_sk(sc->sc_sock->sk); | |
327 | /* the stack's structs aren't sparse endian clean */ | |
328 | saddr = (__force __be32)inet->inet_saddr; | |
329 | daddr = (__force __be32)inet->inet_daddr; | |
330 | sport = (__force __be16)inet->inet_sport; | |
331 | dport = (__force __be16)inet->inet_dport; | |
332 | } | |
2309e9e0 | 333 | |
db02754c SM |
334 | /* XXX sigh, inet-> doesn't have sparse annotation so any |
335 | * use of it here generates a warning with -Wbitwise */ | |
336 | seq_printf(seq, "%p:\n" | |
337 | " krefs: %d\n" | |
338 | " sock: %pI4:%u -> " | |
339 | "%pI4:%u\n" | |
340 | " remote node: %s\n" | |
341 | " page off: %zu\n" | |
342 | " handshake ok: %u\n" | |
343 | " timer: %lld usecs\n" | |
344 | " data ready: %lld usecs\n" | |
345 | " advance start: %lld usecs\n" | |
346 | " advance stop: %lld usecs\n" | |
347 | " func start: %lld usecs\n" | |
348 | " func stop: %lld usecs\n" | |
349 | " func key: 0x%08x\n" | |
350 | " func type: %u\n", | |
351 | sc, | |
352 | atomic_read(&sc->sc_kref.refcount), | |
353 | &saddr, inet ? ntohs(sport) : 0, | |
354 | &daddr, inet ? ntohs(dport) : 0, | |
355 | sc->sc_node->nd_name, | |
356 | sc->sc_page_off, | |
357 | sc->sc_handshake_ok, | |
358 | (long long)ktime_to_us(sc->sc_tv_timer), | |
359 | (long long)ktime_to_us(sc->sc_tv_data_ready), | |
360 | (long long)ktime_to_us(sc->sc_tv_advance_start), | |
361 | (long long)ktime_to_us(sc->sc_tv_advance_stop), | |
362 | (long long)ktime_to_us(sc->sc_tv_func_start), | |
363 | (long long)ktime_to_us(sc->sc_tv_func_stop), | |
364 | sc->sc_msg_key, | |
365 | sc->sc_msg_type); | |
366 | } | |
2309e9e0 | 367 | |
db02754c SM |
368 | static int sc_seq_show(struct seq_file *seq, void *v) |
369 | { | |
370 | struct o2net_sock_debug *sd = seq->private; | |
371 | struct o2net_sock_container *sc, *dummy_sc = sd->dbg_sock; | |
2309e9e0 | 372 | |
db02754c SM |
373 | spin_lock(&o2net_debug_lock); |
374 | sc = next_sc(dummy_sc); | |
2309e9e0 | 375 | |
db02754c SM |
376 | if (sc) { |
377 | if (sd->dbg_ctxt == SHOW_SOCK_CONTAINERS) | |
378 | sc_show_sock_container(seq, sc); | |
379 | else | |
380 | sc_show_sock_stats(seq, sc); | |
2309e9e0 SM |
381 | } |
382 | ||
2309e9e0 SM |
383 | spin_unlock(&o2net_debug_lock); |
384 | ||
385 | return 0; | |
386 | } | |
387 | ||
388 | static void sc_seq_stop(struct seq_file *seq, void *v) | |
389 | { | |
390 | } | |
391 | ||
88e9d34c | 392 | static const struct seq_operations sc_seq_ops = { |
2309e9e0 SM |
393 | .start = sc_seq_start, |
394 | .next = sc_seq_next, | |
395 | .stop = sc_seq_stop, | |
396 | .show = sc_seq_show, | |
397 | }; | |
398 | ||
f3288338 | 399 | static int sc_common_open(struct file *file, int ctxt) |
2309e9e0 | 400 | { |
f3288338 | 401 | struct o2net_sock_debug *sd; |
2309e9e0 | 402 | struct o2net_sock_container *dummy_sc; |
2309e9e0 | 403 | |
f3288338 RJ |
404 | dummy_sc = kzalloc(sizeof(*dummy_sc), GFP_KERNEL); |
405 | if (!dummy_sc) | |
406 | return -ENOMEM; | |
2309e9e0 | 407 | |
f3288338 RJ |
408 | sd = __seq_open_private(file, &sc_seq_ops, sizeof(*sd)); |
409 | if (!sd) { | |
410 | kfree(dummy_sc); | |
411 | return -ENOMEM; | |
412 | } | |
2309e9e0 | 413 | |
f3288338 | 414 | sd->dbg_ctxt = ctxt; |
db02754c | 415 | sd->dbg_sock = dummy_sc; |
2309e9e0 | 416 | |
f3288338 | 417 | o2net_debug_add_sc(dummy_sc); |
2309e9e0 | 418 | |
f3288338 | 419 | return 0; |
2309e9e0 SM |
420 | } |
421 | ||
422 | static int sc_fop_release(struct inode *inode, struct file *file) | |
423 | { | |
424 | struct seq_file *seq = file->private_data; | |
db02754c SM |
425 | struct o2net_sock_debug *sd = seq->private; |
426 | struct o2net_sock_container *dummy_sc = sd->dbg_sock; | |
2309e9e0 SM |
427 | |
428 | o2net_debug_del_sc(dummy_sc); | |
429 | return seq_release_private(inode, file); | |
430 | } | |
431 | ||
db02754c SM |
432 | static int stats_fop_open(struct inode *inode, struct file *file) |
433 | { | |
f3288338 | 434 | return sc_common_open(file, SHOW_SOCK_STATS); |
db02754c SM |
435 | } |
436 | ||
437 | static const struct file_operations stats_seq_fops = { | |
438 | .open = stats_fop_open, | |
439 | .read = seq_read, | |
440 | .llseek = seq_lseek, | |
441 | .release = sc_fop_release, | |
442 | }; | |
443 | ||
444 | static int sc_fop_open(struct inode *inode, struct file *file) | |
445 | { | |
f3288338 | 446 | return sc_common_open(file, SHOW_SOCK_CONTAINERS); |
db02754c SM |
447 | } |
448 | ||
828c0950 | 449 | static const struct file_operations sc_seq_fops = { |
2309e9e0 SM |
450 | .open = sc_fop_open, |
451 | .read = seq_read, | |
452 | .llseek = seq_lseek, | |
453 | .release = sc_fop_release, | |
454 | }; | |
455 | ||
3ba169cc | 456 | static int o2net_fill_bitmap(char *buf, int len) |
2309e9e0 | 457 | { |
3ba169cc SM |
458 | unsigned long map[BITS_TO_LONGS(O2NM_MAX_NODES)]; |
459 | int i = -1, out = 0; | |
2309e9e0 | 460 | |
3ba169cc | 461 | o2net_fill_node_map(map, sizeof(map)); |
2309e9e0 | 462 | |
3ba169cc SM |
463 | while ((i = find_next_bit(map, O2NM_MAX_NODES, i + 1)) < O2NM_MAX_NODES) |
464 | out += snprintf(buf + out, PAGE_SIZE - out, "%d ", i); | |
465 | out += snprintf(buf + out, PAGE_SIZE - out, "\n"); | |
2309e9e0 | 466 | |
3ba169cc SM |
467 | return out; |
468 | } | |
469 | ||
470 | static int nodes_fop_open(struct inode *inode, struct file *file) | |
471 | { | |
472 | char *buf; | |
473 | ||
474 | buf = kmalloc(PAGE_SIZE, GFP_KERNEL); | |
475 | if (!buf) | |
476 | return -ENOMEM; | |
477 | ||
478 | i_size_write(inode, o2net_fill_bitmap(buf, PAGE_SIZE)); | |
479 | ||
480 | file->private_data = buf; | |
db02754c | 481 | |
2309e9e0 | 482 | return 0; |
2309e9e0 SM |
483 | } |
484 | ||
3ba169cc SM |
485 | static int o2net_debug_release(struct inode *inode, struct file *file) |
486 | { | |
487 | kfree(file->private_data); | |
488 | return 0; | |
489 | } | |
490 | ||
491 | static ssize_t o2net_debug_read(struct file *file, char __user *buf, | |
492 | size_t nbytes, loff_t *ppos) | |
493 | { | |
494 | return simple_read_from_buffer(buf, nbytes, ppos, file->private_data, | |
495 | i_size_read(file->f_mapping->host)); | |
496 | } | |
497 | ||
498 | static const struct file_operations nodes_fops = { | |
499 | .open = nodes_fop_open, | |
500 | .release = o2net_debug_release, | |
501 | .read = o2net_debug_read, | |
502 | .llseek = generic_file_llseek, | |
503 | }; | |
504 | ||
2309e9e0 SM |
505 | void o2net_debugfs_exit(void) |
506 | { | |
3ba169cc | 507 | debugfs_remove(nodes_dentry); |
db02754c | 508 | debugfs_remove(stats_dentry); |
37096a79 SM |
509 | debugfs_remove(sc_dentry); |
510 | debugfs_remove(nst_dentry); | |
511 | debugfs_remove(o2net_dentry); | |
2309e9e0 SM |
512 | } |
513 | ||
3ba169cc SM |
514 | int o2net_debugfs_init(void) |
515 | { | |
f4ae40a6 | 516 | umode_t mode = S_IFREG|S_IRUSR; |
3ba169cc SM |
517 | |
518 | o2net_dentry = debugfs_create_dir(O2NET_DEBUG_DIR, NULL); | |
519 | if (o2net_dentry) | |
520 | nst_dentry = debugfs_create_file(NST_DEBUG_NAME, mode, | |
521 | o2net_dentry, NULL, &nst_seq_fops); | |
522 | if (nst_dentry) | |
523 | sc_dentry = debugfs_create_file(SC_DEBUG_NAME, mode, | |
524 | o2net_dentry, NULL, &sc_seq_fops); | |
525 | if (sc_dentry) | |
526 | stats_dentry = debugfs_create_file(STATS_DEBUG_NAME, mode, | |
527 | o2net_dentry, NULL, &stats_seq_fops); | |
528 | if (stats_dentry) | |
529 | nodes_dentry = debugfs_create_file(NODES_DEBUG_NAME, mode, | |
530 | o2net_dentry, NULL, &nodes_fops); | |
531 | if (nodes_dentry) | |
532 | return 0; | |
533 | ||
534 | o2net_debugfs_exit(); | |
535 | mlog_errno(-ENOMEM); | |
536 | return -ENOMEM; | |
537 | } | |
538 | ||
2309e9e0 | 539 | #endif /* CONFIG_DEBUG_FS */ |