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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * netdebug.c
4 *
5 * debug functionality for o2net
6 *
7 * Copyright (C) 2005, 2008 Oracle. All rights reserved.
8 */
9
10#ifdef CONFIG_DEBUG_FS
11
12#include <linux/module.h>
13#include <linux/types.h>
14#include <linux/slab.h>
15#include <linux/idr.h>
16#include <linux/kref.h>
17#include <linux/seq_file.h>
18#include <linux/debugfs.h>
19
20#include <linux/uaccess.h>
21
22#include "tcp.h"
23#include "nodemanager.h"
24#define MLOG_MASK_PREFIX ML_TCP
25#include "masklog.h"
26
27#include "tcp_internal.h"
28
29#define O2NET_DEBUG_DIR "o2net"
30#define SC_DEBUG_NAME "sock_containers"
31#define NST_DEBUG_NAME "send_tracking"
32#define STATS_DEBUG_NAME "stats"
33#define NODES_DEBUG_NAME "connected_nodes"
34
35#define SHOW_SOCK_CONTAINERS 0
36#define SHOW_SOCK_STATS 1
37
38static struct dentry *o2net_dentry;
39
40static DEFINE_SPINLOCK(o2net_debug_lock);
41
42static LIST_HEAD(sock_containers);
43static LIST_HEAD(send_tracking);
44
45void o2net_debug_add_nst(struct o2net_send_tracking *nst)
46{
47 spin_lock(&o2net_debug_lock);
48 list_add(&nst->st_net_debug_item, &send_tracking);
49 spin_unlock(&o2net_debug_lock);
50}
51
52void o2net_debug_del_nst(struct o2net_send_tracking *nst)
53{
54 spin_lock(&o2net_debug_lock);
55 if (!list_empty(&nst->st_net_debug_item))
56 list_del_init(&nst->st_net_debug_item);
57 spin_unlock(&o2net_debug_lock);
58}
59
60static struct o2net_send_tracking
61 *next_nst(struct o2net_send_tracking *nst_start)
62{
63 struct o2net_send_tracking *nst, *ret = NULL;
64
65 assert_spin_locked(&o2net_debug_lock);
66
67 list_for_each_entry(nst, &nst_start->st_net_debug_item,
68 st_net_debug_item) {
69 /* discover the head of the list */
70 if (&nst->st_net_debug_item == &send_tracking)
71 break;
72
73 /* use st_task to detect real nsts in the list */
74 if (nst->st_task != NULL) {
75 ret = nst;
76 break;
77 }
78 }
79
80 return ret;
81}
82
83static void *nst_seq_start(struct seq_file *seq, loff_t *pos)
84{
85 struct o2net_send_tracking *nst, *dummy_nst = seq->private;
86
87 spin_lock(&o2net_debug_lock);
88 nst = next_nst(dummy_nst);
89 spin_unlock(&o2net_debug_lock);
90
91 return nst;
92}
93
94static void *nst_seq_next(struct seq_file *seq, void *v, loff_t *pos)
95{
96 struct o2net_send_tracking *nst, *dummy_nst = seq->private;
97
98 spin_lock(&o2net_debug_lock);
99 nst = next_nst(dummy_nst);
100 list_del_init(&dummy_nst->st_net_debug_item);
101 if (nst)
102 list_add(&dummy_nst->st_net_debug_item,
103 &nst->st_net_debug_item);
104 spin_unlock(&o2net_debug_lock);
105
106 return nst; /* unused, just needs to be null when done */
107}
108
109static int nst_seq_show(struct seq_file *seq, void *v)
110{
111 struct o2net_send_tracking *nst, *dummy_nst = seq->private;
112 ktime_t now;
113 s64 sock, send, status;
114
115 spin_lock(&o2net_debug_lock);
116 nst = next_nst(dummy_nst);
117 if (!nst)
118 goto out;
119
120 now = ktime_get();
121 sock = ktime_to_us(ktime_sub(now, nst->st_sock_time));
122 send = ktime_to_us(ktime_sub(now, nst->st_send_time));
123 status = ktime_to_us(ktime_sub(now, nst->st_status_time));
124
125 /* get_task_comm isn't exported. oh well. */
126 seq_printf(seq, "%p:\n"
127 " pid: %lu\n"
128 " tgid: %lu\n"
129 " process name: %s\n"
130 " node: %u\n"
131 " sc: %p\n"
132 " message id: %d\n"
133 " message type: %u\n"
134 " message key: 0x%08x\n"
135 " sock acquiry: %lld usecs ago\n"
136 " send start: %lld usecs ago\n"
137 " wait start: %lld usecs ago\n",
138 nst, (unsigned long)task_pid_nr(nst->st_task),
139 (unsigned long)nst->st_task->tgid,
140 nst->st_task->comm, nst->st_node,
141 nst->st_sc, nst->st_id, nst->st_msg_type,
142 nst->st_msg_key,
143 (long long)sock,
144 (long long)send,
145 (long long)status);
146
147out:
148 spin_unlock(&o2net_debug_lock);
149
150 return 0;
151}
152
153static void nst_seq_stop(struct seq_file *seq, void *v)
154{
155}
156
157static const struct seq_operations nst_seq_ops = {
158 .start = nst_seq_start,
159 .next = nst_seq_next,
160 .stop = nst_seq_stop,
161 .show = nst_seq_show,
162};
163
164static int nst_fop_open(struct inode *inode, struct file *file)
165{
166 struct o2net_send_tracking *dummy_nst;
167
168 dummy_nst = __seq_open_private(file, &nst_seq_ops, sizeof(*dummy_nst));
169 if (!dummy_nst)
170 return -ENOMEM;
171 o2net_debug_add_nst(dummy_nst);
172
173 return 0;
174}
175
176static int nst_fop_release(struct inode *inode, struct file *file)
177{
178 struct seq_file *seq = file->private_data;
179 struct o2net_send_tracking *dummy_nst = seq->private;
180
181 o2net_debug_del_nst(dummy_nst);
182 return seq_release_private(inode, file);
183}
184
185static const struct file_operations nst_seq_fops = {
186 .open = nst_fop_open,
187 .read = seq_read,
188 .llseek = seq_lseek,
189 .release = nst_fop_release,
190};
191
192void o2net_debug_add_sc(struct o2net_sock_container *sc)
193{
194 spin_lock(&o2net_debug_lock);
195 list_add(&sc->sc_net_debug_item, &sock_containers);
196 spin_unlock(&o2net_debug_lock);
197}
198
199void o2net_debug_del_sc(struct o2net_sock_container *sc)
200{
201 spin_lock(&o2net_debug_lock);
202 list_del_init(&sc->sc_net_debug_item);
203 spin_unlock(&o2net_debug_lock);
204}
205
206struct o2net_sock_debug {
207 int dbg_ctxt;
208 struct o2net_sock_container *dbg_sock;
209};
210
211static struct o2net_sock_container
212 *next_sc(struct o2net_sock_container *sc_start)
213{
214 struct o2net_sock_container *sc, *ret = NULL;
215
216 assert_spin_locked(&o2net_debug_lock);
217
218 list_for_each_entry(sc, &sc_start->sc_net_debug_item,
219 sc_net_debug_item) {
220 /* discover the head of the list miscast as a sc */
221 if (&sc->sc_net_debug_item == &sock_containers)
222 break;
223
224 /* use sc_page to detect real scs in the list */
225 if (sc->sc_page != NULL) {
226 ret = sc;
227 break;
228 }
229 }
230
231 return ret;
232}
233
234static void *sc_seq_start(struct seq_file *seq, loff_t *pos)
235{
236 struct o2net_sock_debug *sd = seq->private;
237 struct o2net_sock_container *sc, *dummy_sc = sd->dbg_sock;
238
239 spin_lock(&o2net_debug_lock);
240 sc = next_sc(dummy_sc);
241 spin_unlock(&o2net_debug_lock);
242
243 return sc;
244}
245
246static void *sc_seq_next(struct seq_file *seq, void *v, loff_t *pos)
247{
248 struct o2net_sock_debug *sd = seq->private;
249 struct o2net_sock_container *sc, *dummy_sc = sd->dbg_sock;
250
251 spin_lock(&o2net_debug_lock);
252 sc = next_sc(dummy_sc);
253 list_del_init(&dummy_sc->sc_net_debug_item);
254 if (sc)
255 list_add(&dummy_sc->sc_net_debug_item, &sc->sc_net_debug_item);
256 spin_unlock(&o2net_debug_lock);
257
258 return sc; /* unused, just needs to be null when done */
259}
260
261#ifdef CONFIG_OCFS2_FS_STATS
262# define sc_send_count(_s) ((_s)->sc_send_count)
263# define sc_recv_count(_s) ((_s)->sc_recv_count)
264# define sc_tv_acquiry_total_ns(_s) (ktime_to_ns((_s)->sc_tv_acquiry_total))
265# define sc_tv_send_total_ns(_s) (ktime_to_ns((_s)->sc_tv_send_total))
266# define sc_tv_status_total_ns(_s) (ktime_to_ns((_s)->sc_tv_status_total))
267# define sc_tv_process_total_ns(_s) (ktime_to_ns((_s)->sc_tv_process_total))
268#else
269# define sc_send_count(_s) (0U)
270# define sc_recv_count(_s) (0U)
271# define sc_tv_acquiry_total_ns(_s) (0LL)
272# define sc_tv_send_total_ns(_s) (0LL)
273# define sc_tv_status_total_ns(_s) (0LL)
274# define sc_tv_process_total_ns(_s) (0LL)
275#endif
276
277/* So that debugfs.ocfs2 can determine which format is being used */
278#define O2NET_STATS_STR_VERSION 1
279static void sc_show_sock_stats(struct seq_file *seq,
280 struct o2net_sock_container *sc)
281{
282 if (!sc)
283 return;
284
285 seq_printf(seq, "%d,%u,%lu,%lld,%lld,%lld,%lu,%lld\n", O2NET_STATS_STR_VERSION,
286 sc->sc_node->nd_num, (unsigned long)sc_send_count(sc),
287 (long long)sc_tv_acquiry_total_ns(sc),
288 (long long)sc_tv_send_total_ns(sc),
289 (long long)sc_tv_status_total_ns(sc),
290 (unsigned long)sc_recv_count(sc),
291 (long long)sc_tv_process_total_ns(sc));
292}
293
294static void sc_show_sock_container(struct seq_file *seq,
295 struct o2net_sock_container *sc)
296{
297 struct inet_sock *inet = NULL;
298 __be32 saddr = 0, daddr = 0;
299 __be16 sport = 0, dport = 0;
300
301 if (!sc)
302 return;
303
304 if (sc->sc_sock) {
305 inet = inet_sk(sc->sc_sock->sk);
306 /* the stack's structs aren't sparse endian clean */
307 saddr = (__force __be32)inet->inet_saddr;
308 daddr = (__force __be32)inet->inet_daddr;
309 sport = (__force __be16)inet->inet_sport;
310 dport = (__force __be16)inet->inet_dport;
311 }
312
313 /* XXX sigh, inet-> doesn't have sparse annotation so any
314 * use of it here generates a warning with -Wbitwise */
315 seq_printf(seq, "%p:\n"
316 " krefs: %d\n"
317 " sock: %pI4:%u -> "
318 "%pI4:%u\n"
319 " remote node: %s\n"
320 " page off: %zu\n"
321 " handshake ok: %u\n"
322 " timer: %lld usecs\n"
323 " data ready: %lld usecs\n"
324 " advance start: %lld usecs\n"
325 " advance stop: %lld usecs\n"
326 " func start: %lld usecs\n"
327 " func stop: %lld usecs\n"
328 " func key: 0x%08x\n"
329 " func type: %u\n",
330 sc,
331 kref_read(&sc->sc_kref),
332 &saddr, inet ? ntohs(sport) : 0,
333 &daddr, inet ? ntohs(dport) : 0,
334 sc->sc_node->nd_name,
335 sc->sc_page_off,
336 sc->sc_handshake_ok,
337 (long long)ktime_to_us(sc->sc_tv_timer),
338 (long long)ktime_to_us(sc->sc_tv_data_ready),
339 (long long)ktime_to_us(sc->sc_tv_advance_start),
340 (long long)ktime_to_us(sc->sc_tv_advance_stop),
341 (long long)ktime_to_us(sc->sc_tv_func_start),
342 (long long)ktime_to_us(sc->sc_tv_func_stop),
343 sc->sc_msg_key,
344 sc->sc_msg_type);
345}
346
347static int sc_seq_show(struct seq_file *seq, void *v)
348{
349 struct o2net_sock_debug *sd = seq->private;
350 struct o2net_sock_container *sc, *dummy_sc = sd->dbg_sock;
351
352 spin_lock(&o2net_debug_lock);
353 sc = next_sc(dummy_sc);
354
355 if (sc) {
356 if (sd->dbg_ctxt == SHOW_SOCK_CONTAINERS)
357 sc_show_sock_container(seq, sc);
358 else
359 sc_show_sock_stats(seq, sc);
360 }
361
362 spin_unlock(&o2net_debug_lock);
363
364 return 0;
365}
366
367static void sc_seq_stop(struct seq_file *seq, void *v)
368{
369}
370
371static const struct seq_operations sc_seq_ops = {
372 .start = sc_seq_start,
373 .next = sc_seq_next,
374 .stop = sc_seq_stop,
375 .show = sc_seq_show,
376};
377
378static int sc_common_open(struct file *file, int ctxt)
379{
380 struct o2net_sock_debug *sd;
381 struct o2net_sock_container *dummy_sc;
382
383 dummy_sc = kzalloc(sizeof(*dummy_sc), GFP_KERNEL);
384 if (!dummy_sc)
385 return -ENOMEM;
386
387 sd = __seq_open_private(file, &sc_seq_ops, sizeof(*sd));
388 if (!sd) {
389 kfree(dummy_sc);
390 return -ENOMEM;
391 }
392
393 sd->dbg_ctxt = ctxt;
394 sd->dbg_sock = dummy_sc;
395
396 o2net_debug_add_sc(dummy_sc);
397
398 return 0;
399}
400
401static int sc_fop_release(struct inode *inode, struct file *file)
402{
403 struct seq_file *seq = file->private_data;
404 struct o2net_sock_debug *sd = seq->private;
405 struct o2net_sock_container *dummy_sc = sd->dbg_sock;
406
407 o2net_debug_del_sc(dummy_sc);
408 kfree(dummy_sc);
409 return seq_release_private(inode, file);
410}
411
412static int stats_fop_open(struct inode *inode, struct file *file)
413{
414 return sc_common_open(file, SHOW_SOCK_STATS);
415}
416
417static const struct file_operations stats_seq_fops = {
418 .open = stats_fop_open,
419 .read = seq_read,
420 .llseek = seq_lseek,
421 .release = sc_fop_release,
422};
423
424static int sc_fop_open(struct inode *inode, struct file *file)
425{
426 return sc_common_open(file, SHOW_SOCK_CONTAINERS);
427}
428
429static const struct file_operations sc_seq_fops = {
430 .open = sc_fop_open,
431 .read = seq_read,
432 .llseek = seq_lseek,
433 .release = sc_fop_release,
434};
435
436static int o2net_fill_bitmap(char *buf, int len)
437{
438 unsigned long map[BITS_TO_LONGS(O2NM_MAX_NODES)];
439 int i = -1, out = 0;
440
441 o2net_fill_node_map(map, O2NM_MAX_NODES);
442
443 while ((i = find_next_bit(map, O2NM_MAX_NODES, i + 1)) < O2NM_MAX_NODES)
444 out += scnprintf(buf + out, PAGE_SIZE - out, "%d ", i);
445 out += scnprintf(buf + out, PAGE_SIZE - out, "\n");
446
447 return out;
448}
449
450static int nodes_fop_open(struct inode *inode, struct file *file)
451{
452 char *buf;
453
454 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
455 if (!buf)
456 return -ENOMEM;
457
458 i_size_write(inode, o2net_fill_bitmap(buf, PAGE_SIZE));
459
460 file->private_data = buf;
461
462 return 0;
463}
464
465static int o2net_debug_release(struct inode *inode, struct file *file)
466{
467 kfree(file->private_data);
468 return 0;
469}
470
471static ssize_t o2net_debug_read(struct file *file, char __user *buf,
472 size_t nbytes, loff_t *ppos)
473{
474 return simple_read_from_buffer(buf, nbytes, ppos, file->private_data,
475 i_size_read(file->f_mapping->host));
476}
477
478static const struct file_operations nodes_fops = {
479 .open = nodes_fop_open,
480 .release = o2net_debug_release,
481 .read = o2net_debug_read,
482 .llseek = generic_file_llseek,
483};
484
485void o2net_debugfs_exit(void)
486{
487 debugfs_remove_recursive(o2net_dentry);
488}
489
490void o2net_debugfs_init(void)
491{
492 umode_t mode = S_IFREG|S_IRUSR;
493
494 o2net_dentry = debugfs_create_dir(O2NET_DEBUG_DIR, NULL);
495
496 debugfs_create_file(NST_DEBUG_NAME, mode, o2net_dentry, NULL,
497 &nst_seq_fops);
498 debugfs_create_file(SC_DEBUG_NAME, mode, o2net_dentry, NULL,
499 &sc_seq_fops);
500 debugfs_create_file(STATS_DEBUG_NAME, mode, o2net_dentry, NULL,
501 &stats_seq_fops);
502 debugfs_create_file(NODES_DEBUG_NAME, mode, o2net_dentry, NULL,
503 &nodes_fops);
504}
505
506#endif /* CONFIG_DEBUG_FS */
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"
49#define STATS_DEBUG_NAME "stats"
50#define NODES_DEBUG_NAME "connected_nodes"
51
52#define SHOW_SOCK_CONTAINERS 0
53#define SHOW_SOCK_STATS 1
54
55static struct dentry *o2net_dentry;
56static struct dentry *sc_dentry;
57static struct dentry *nst_dentry;
58static struct dentry *stats_dentry;
59static struct dentry *nodes_dentry;
60
61static DEFINE_SPINLOCK(o2net_debug_lock);
62
63static LIST_HEAD(sock_containers);
64static LIST_HEAD(send_tracking);
65
66void 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
73void 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
81static 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
104static 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
115static 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
130static int nst_seq_show(struct seq_file *seq, void *v)
131{
132 struct o2net_send_tracking *nst, *dummy_nst = seq->private;
133 ktime_t now;
134 s64 sock, send, status;
135
136 spin_lock(&o2net_debug_lock);
137 nst = next_nst(dummy_nst);
138 if (!nst)
139 goto out;
140
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
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);
167
168out:
169 spin_unlock(&o2net_debug_lock);
170
171 return 0;
172}
173
174static void nst_seq_stop(struct seq_file *seq, void *v)
175{
176}
177
178static const struct seq_operations nst_seq_ops = {
179 .start = nst_seq_start,
180 .next = nst_seq_next,
181 .stop = nst_seq_stop,
182 .show = nst_seq_show,
183};
184
185static int nst_fop_open(struct inode *inode, struct file *file)
186{
187 struct o2net_send_tracking *dummy_nst;
188 struct seq_file *seq;
189 int ret;
190
191 dummy_nst = kmalloc(sizeof(struct o2net_send_tracking), GFP_KERNEL);
192 if (dummy_nst == NULL) {
193 ret = -ENOMEM;
194 goto out;
195 }
196 dummy_nst->st_task = NULL;
197
198 ret = seq_open(file, &nst_seq_ops);
199 if (ret)
200 goto out;
201
202 seq = file->private_data;
203 seq->private = dummy_nst;
204 o2net_debug_add_nst(dummy_nst);
205
206 dummy_nst = NULL;
207
208out:
209 kfree(dummy_nst);
210 return ret;
211}
212
213static int nst_fop_release(struct inode *inode, struct file *file)
214{
215 struct seq_file *seq = file->private_data;
216 struct o2net_send_tracking *dummy_nst = seq->private;
217
218 o2net_debug_del_nst(dummy_nst);
219 return seq_release_private(inode, file);
220}
221
222static const struct file_operations nst_seq_fops = {
223 .open = nst_fop_open,
224 .read = seq_read,
225 .llseek = seq_lseek,
226 .release = nst_fop_release,
227};
228
229void o2net_debug_add_sc(struct o2net_sock_container *sc)
230{
231 spin_lock(&o2net_debug_lock);
232 list_add(&sc->sc_net_debug_item, &sock_containers);
233 spin_unlock(&o2net_debug_lock);
234}
235
236void o2net_debug_del_sc(struct o2net_sock_container *sc)
237{
238 spin_lock(&o2net_debug_lock);
239 list_del_init(&sc->sc_net_debug_item);
240 spin_unlock(&o2net_debug_lock);
241}
242
243struct o2net_sock_debug {
244 int dbg_ctxt;
245 struct o2net_sock_container *dbg_sock;
246};
247
248static struct o2net_sock_container
249 *next_sc(struct o2net_sock_container *sc_start)
250{
251 struct o2net_sock_container *sc, *ret = NULL;
252
253 assert_spin_locked(&o2net_debug_lock);
254
255 list_for_each_entry(sc, &sc_start->sc_net_debug_item,
256 sc_net_debug_item) {
257 /* discover the head of the list miscast as a sc */
258 if (&sc->sc_net_debug_item == &sock_containers)
259 break;
260
261 /* use sc_page to detect real scs in the list */
262 if (sc->sc_page != NULL) {
263 ret = sc;
264 break;
265 }
266 }
267
268 return ret;
269}
270
271static void *sc_seq_start(struct seq_file *seq, loff_t *pos)
272{
273 struct o2net_sock_debug *sd = seq->private;
274 struct o2net_sock_container *sc, *dummy_sc = sd->dbg_sock;
275
276 spin_lock(&o2net_debug_lock);
277 sc = next_sc(dummy_sc);
278 spin_unlock(&o2net_debug_lock);
279
280 return sc;
281}
282
283static void *sc_seq_next(struct seq_file *seq, void *v, loff_t *pos)
284{
285 struct o2net_sock_debug *sd = seq->private;
286 struct o2net_sock_container *sc, *dummy_sc = sd->dbg_sock;
287
288 spin_lock(&o2net_debug_lock);
289 sc = next_sc(dummy_sc);
290 list_del_init(&dummy_sc->sc_net_debug_item);
291 if (sc)
292 list_add(&dummy_sc->sc_net_debug_item, &sc->sc_net_debug_item);
293 spin_unlock(&o2net_debug_lock);
294
295 return sc; /* unused, just needs to be null when done */
296}
297
298#ifdef CONFIG_OCFS2_FS_STATS
299# define sc_send_count(_s) ((_s)->sc_send_count)
300# define sc_recv_count(_s) ((_s)->sc_recv_count)
301# define sc_tv_acquiry_total_ns(_s) (ktime_to_ns((_s)->sc_tv_acquiry_total))
302# define sc_tv_send_total_ns(_s) (ktime_to_ns((_s)->sc_tv_send_total))
303# define sc_tv_status_total_ns(_s) (ktime_to_ns((_s)->sc_tv_status_total))
304# define sc_tv_process_total_ns(_s) (ktime_to_ns((_s)->sc_tv_process_total))
305#else
306# define sc_send_count(_s) (0U)
307# define sc_recv_count(_s) (0U)
308# define sc_tv_acquiry_total_ns(_s) (0LL)
309# define sc_tv_send_total_ns(_s) (0LL)
310# define sc_tv_status_total_ns(_s) (0LL)
311# define sc_tv_process_total_ns(_s) (0LL)
312#endif
313
314/* So that debugfs.ocfs2 can determine which format is being used */
315#define O2NET_STATS_STR_VERSION 1
316static void sc_show_sock_stats(struct seq_file *seq,
317 struct o2net_sock_container *sc)
318{
319 if (!sc)
320 return;
321
322 seq_printf(seq, "%d,%u,%lu,%lld,%lld,%lld,%lu,%lld\n", O2NET_STATS_STR_VERSION,
323 sc->sc_node->nd_num, (unsigned long)sc_send_count(sc),
324 (long long)sc_tv_acquiry_total_ns(sc),
325 (long long)sc_tv_send_total_ns(sc),
326 (long long)sc_tv_status_total_ns(sc),
327 (unsigned long)sc_recv_count(sc),
328 (long long)sc_tv_process_total_ns(sc));
329}
330
331static void sc_show_sock_container(struct seq_file *seq,
332 struct o2net_sock_container *sc)
333{
334 struct inet_sock *inet = NULL;
335 __be32 saddr = 0, daddr = 0;
336 __be16 sport = 0, dport = 0;
337
338 if (!sc)
339 return;
340
341 if (sc->sc_sock) {
342 inet = inet_sk(sc->sc_sock->sk);
343 /* the stack's structs aren't sparse endian clean */
344 saddr = (__force __be32)inet->inet_saddr;
345 daddr = (__force __be32)inet->inet_daddr;
346 sport = (__force __be16)inet->inet_sport;
347 dport = (__force __be16)inet->inet_dport;
348 }
349
350 /* XXX sigh, inet-> doesn't have sparse annotation so any
351 * use of it here generates a warning with -Wbitwise */
352 seq_printf(seq, "%p:\n"
353 " krefs: %d\n"
354 " sock: %pI4:%u -> "
355 "%pI4:%u\n"
356 " remote node: %s\n"
357 " page off: %zu\n"
358 " handshake ok: %u\n"
359 " timer: %lld usecs\n"
360 " data ready: %lld usecs\n"
361 " advance start: %lld usecs\n"
362 " advance stop: %lld usecs\n"
363 " func start: %lld usecs\n"
364 " func stop: %lld usecs\n"
365 " func key: 0x%08x\n"
366 " func type: %u\n",
367 sc,
368 atomic_read(&sc->sc_kref.refcount),
369 &saddr, inet ? ntohs(sport) : 0,
370 &daddr, inet ? ntohs(dport) : 0,
371 sc->sc_node->nd_name,
372 sc->sc_page_off,
373 sc->sc_handshake_ok,
374 (long long)ktime_to_us(sc->sc_tv_timer),
375 (long long)ktime_to_us(sc->sc_tv_data_ready),
376 (long long)ktime_to_us(sc->sc_tv_advance_start),
377 (long long)ktime_to_us(sc->sc_tv_advance_stop),
378 (long long)ktime_to_us(sc->sc_tv_func_start),
379 (long long)ktime_to_us(sc->sc_tv_func_stop),
380 sc->sc_msg_key,
381 sc->sc_msg_type);
382}
383
384static int sc_seq_show(struct seq_file *seq, void *v)
385{
386 struct o2net_sock_debug *sd = seq->private;
387 struct o2net_sock_container *sc, *dummy_sc = sd->dbg_sock;
388
389 spin_lock(&o2net_debug_lock);
390 sc = next_sc(dummy_sc);
391
392 if (sc) {
393 if (sd->dbg_ctxt == SHOW_SOCK_CONTAINERS)
394 sc_show_sock_container(seq, sc);
395 else
396 sc_show_sock_stats(seq, sc);
397 }
398
399 spin_unlock(&o2net_debug_lock);
400
401 return 0;
402}
403
404static void sc_seq_stop(struct seq_file *seq, void *v)
405{
406}
407
408static const struct seq_operations sc_seq_ops = {
409 .start = sc_seq_start,
410 .next = sc_seq_next,
411 .stop = sc_seq_stop,
412 .show = sc_seq_show,
413};
414
415static int sc_common_open(struct file *file, struct o2net_sock_debug *sd)
416{
417 struct o2net_sock_container *dummy_sc;
418 struct seq_file *seq;
419 int ret;
420
421 dummy_sc = kmalloc(sizeof(struct o2net_sock_container), GFP_KERNEL);
422 if (dummy_sc == NULL) {
423 ret = -ENOMEM;
424 goto out;
425 }
426 dummy_sc->sc_page = NULL;
427
428 ret = seq_open(file, &sc_seq_ops);
429 if (ret)
430 goto out;
431
432 seq = file->private_data;
433 seq->private = sd;
434 sd->dbg_sock = dummy_sc;
435 o2net_debug_add_sc(dummy_sc);
436
437 dummy_sc = NULL;
438
439out:
440 kfree(dummy_sc);
441 return ret;
442}
443
444static int sc_fop_release(struct inode *inode, struct file *file)
445{
446 struct seq_file *seq = file->private_data;
447 struct o2net_sock_debug *sd = seq->private;
448 struct o2net_sock_container *dummy_sc = sd->dbg_sock;
449
450 o2net_debug_del_sc(dummy_sc);
451 return seq_release_private(inode, file);
452}
453
454static int stats_fop_open(struct inode *inode, struct file *file)
455{
456 struct o2net_sock_debug *sd;
457
458 sd = kmalloc(sizeof(struct o2net_sock_debug), GFP_KERNEL);
459 if (sd == NULL)
460 return -ENOMEM;
461
462 sd->dbg_ctxt = SHOW_SOCK_STATS;
463 sd->dbg_sock = NULL;
464
465 return sc_common_open(file, sd);
466}
467
468static const struct file_operations stats_seq_fops = {
469 .open = stats_fop_open,
470 .read = seq_read,
471 .llseek = seq_lseek,
472 .release = sc_fop_release,
473};
474
475static int sc_fop_open(struct inode *inode, struct file *file)
476{
477 struct o2net_sock_debug *sd;
478
479 sd = kmalloc(sizeof(struct o2net_sock_debug), GFP_KERNEL);
480 if (sd == NULL)
481 return -ENOMEM;
482
483 sd->dbg_ctxt = SHOW_SOCK_CONTAINERS;
484 sd->dbg_sock = NULL;
485
486 return sc_common_open(file, sd);
487}
488
489static const struct file_operations sc_seq_fops = {
490 .open = sc_fop_open,
491 .read = seq_read,
492 .llseek = seq_lseek,
493 .release = sc_fop_release,
494};
495
496static int o2net_fill_bitmap(char *buf, int len)
497{
498 unsigned long map[BITS_TO_LONGS(O2NM_MAX_NODES)];
499 int i = -1, out = 0;
500
501 o2net_fill_node_map(map, sizeof(map));
502
503 while ((i = find_next_bit(map, O2NM_MAX_NODES, i + 1)) < O2NM_MAX_NODES)
504 out += snprintf(buf + out, PAGE_SIZE - out, "%d ", i);
505 out += snprintf(buf + out, PAGE_SIZE - out, "\n");
506
507 return out;
508}
509
510static int nodes_fop_open(struct inode *inode, struct file *file)
511{
512 char *buf;
513
514 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
515 if (!buf)
516 return -ENOMEM;
517
518 i_size_write(inode, o2net_fill_bitmap(buf, PAGE_SIZE));
519
520 file->private_data = buf;
521
522 return 0;
523}
524
525static int o2net_debug_release(struct inode *inode, struct file *file)
526{
527 kfree(file->private_data);
528 return 0;
529}
530
531static ssize_t o2net_debug_read(struct file *file, char __user *buf,
532 size_t nbytes, loff_t *ppos)
533{
534 return simple_read_from_buffer(buf, nbytes, ppos, file->private_data,
535 i_size_read(file->f_mapping->host));
536}
537
538static const struct file_operations nodes_fops = {
539 .open = nodes_fop_open,
540 .release = o2net_debug_release,
541 .read = o2net_debug_read,
542 .llseek = generic_file_llseek,
543};
544
545void o2net_debugfs_exit(void)
546{
547 debugfs_remove(nodes_dentry);
548 debugfs_remove(stats_dentry);
549 debugfs_remove(sc_dentry);
550 debugfs_remove(nst_dentry);
551 debugfs_remove(o2net_dentry);
552}
553
554int o2net_debugfs_init(void)
555{
556 umode_t mode = S_IFREG|S_IRUSR;
557
558 o2net_dentry = debugfs_create_dir(O2NET_DEBUG_DIR, NULL);
559 if (o2net_dentry)
560 nst_dentry = debugfs_create_file(NST_DEBUG_NAME, mode,
561 o2net_dentry, NULL, &nst_seq_fops);
562 if (nst_dentry)
563 sc_dentry = debugfs_create_file(SC_DEBUG_NAME, mode,
564 o2net_dentry, NULL, &sc_seq_fops);
565 if (sc_dentry)
566 stats_dentry = debugfs_create_file(STATS_DEBUG_NAME, mode,
567 o2net_dentry, NULL, &stats_seq_fops);
568 if (stats_dentry)
569 nodes_dentry = debugfs_create_file(NODES_DEBUG_NAME, mode,
570 o2net_dentry, NULL, &nodes_fops);
571 if (nodes_dentry)
572 return 0;
573
574 o2net_debugfs_exit();
575 mlog_errno(-ENOMEM);
576 return -ENOMEM;
577}
578
579#endif /* CONFIG_DEBUG_FS */