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