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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
50static struct dentry *o2net_dentry;
51static struct dentry *sc_dentry;
52static struct dentry *nst_dentry;
53
54static DEFINE_SPINLOCK(o2net_debug_lock);
55
56static LIST_HEAD(sock_containers);
57static LIST_HEAD(send_tracking);
58
59void o2net_debug_add_nst(struct o2net_send_tracking *nst)
60{
61 spin_lock(&o2net_debug_lock);
62 list_add(&nst->st_net_debug_item, &send_tracking);
63 spin_unlock(&o2net_debug_lock);
64}
65
66void o2net_debug_del_nst(struct o2net_send_tracking *nst)
67{
68 spin_lock(&o2net_debug_lock);
69 if (!list_empty(&nst->st_net_debug_item))
70 list_del_init(&nst->st_net_debug_item);
71 spin_unlock(&o2net_debug_lock);
72}
73
74static struct o2net_send_tracking
75 *next_nst(struct o2net_send_tracking *nst_start)
76{
77 struct o2net_send_tracking *nst, *ret = NULL;
78
79 assert_spin_locked(&o2net_debug_lock);
80
81 list_for_each_entry(nst, &nst_start->st_net_debug_item,
82 st_net_debug_item) {
83
84 if (&nst->st_net_debug_item == &send_tracking)
85 break;
86
87
88 if (nst->st_task != NULL) {
89 ret = nst;
90 break;
91 }
92 }
93
94 return ret;
95}
96
97static void *nst_seq_start(struct seq_file *seq, loff_t *pos)
98{
99 struct o2net_send_tracking *nst, *dummy_nst = seq->private;
100
101 spin_lock(&o2net_debug_lock);
102 nst = next_nst(dummy_nst);
103 spin_unlock(&o2net_debug_lock);
104
105 return nst;
106}
107
108static void *nst_seq_next(struct seq_file *seq, void *v, loff_t *pos)
109{
110 struct o2net_send_tracking *nst, *dummy_nst = seq->private;
111
112 spin_lock(&o2net_debug_lock);
113 nst = next_nst(dummy_nst);
114 list_del_init(&dummy_nst->st_net_debug_item);
115 if (nst)
116 list_add(&dummy_nst->st_net_debug_item,
117 &nst->st_net_debug_item);
118 spin_unlock(&o2net_debug_lock);
119
120 return nst;
121}
122
123static int nst_seq_show(struct seq_file *seq, void *v)
124{
125 struct o2net_send_tracking *nst, *dummy_nst = seq->private;
126
127 spin_lock(&o2net_debug_lock);
128 nst = next_nst(dummy_nst);
129
130 if (nst != NULL) {
131
132 seq_printf(seq, "%p:\n"
133 " pid: %lu\n"
134 " tgid: %lu\n"
135 " process name: %s\n"
136 " node: %u\n"
137 " sc: %p\n"
138 " message id: %d\n"
139 " message type: %u\n"
140 " message key: 0x%08x\n"
141 " sock acquiry: %lu.%ld\n"
142 " send start: %lu.%ld\n"
143 " wait start: %lu.%ld\n",
144 nst, (unsigned long)nst->st_task->pid,
145 (unsigned long)nst->st_task->tgid,
146 nst->st_task->comm, nst->st_node,
147 nst->st_sc, nst->st_id, nst->st_msg_type,
148 nst->st_msg_key,
149 nst->st_sock_time.tv_sec,
150 (long)nst->st_sock_time.tv_usec,
151 nst->st_send_time.tv_sec,
152 (long)nst->st_send_time.tv_usec,
153 nst->st_status_time.tv_sec,
154 (long)nst->st_status_time.tv_usec);
155 }
156
157 spin_unlock(&o2net_debug_lock);
158
159 return 0;
160}
161
162static void nst_seq_stop(struct seq_file *seq, void *v)
163{
164}
165
166static const struct seq_operations nst_seq_ops = {
167 .start = nst_seq_start,
168 .next = nst_seq_next,
169 .stop = nst_seq_stop,
170 .show = nst_seq_show,
171};
172
173static int nst_fop_open(struct inode *inode, struct file *file)
174{
175 struct o2net_send_tracking *dummy_nst;
176 struct seq_file *seq;
177 int ret;
178
179 dummy_nst = kmalloc(sizeof(struct o2net_send_tracking), GFP_KERNEL);
180 if (dummy_nst == NULL) {
181 ret = -ENOMEM;
182 goto out;
183 }
184 dummy_nst->st_task = NULL;
185
186 ret = seq_open(file, &nst_seq_ops);
187 if (ret)
188 goto out;
189
190 seq = file->private_data;
191 seq->private = dummy_nst;
192 o2net_debug_add_nst(dummy_nst);
193
194 dummy_nst = NULL;
195
196out:
197 kfree(dummy_nst);
198 return ret;
199}
200
201static int nst_fop_release(struct inode *inode, struct file *file)
202{
203 struct seq_file *seq = file->private_data;
204 struct o2net_send_tracking *dummy_nst = seq->private;
205
206 o2net_debug_del_nst(dummy_nst);
207 return seq_release_private(inode, file);
208}
209
210static const struct file_operations nst_seq_fops = {
211 .open = nst_fop_open,
212 .read = seq_read,
213 .llseek = seq_lseek,
214 .release = nst_fop_release,
215};
216
217void o2net_debug_add_sc(struct o2net_sock_container *sc)
218{
219 spin_lock(&o2net_debug_lock);
220 list_add(&sc->sc_net_debug_item, &sock_containers);
221 spin_unlock(&o2net_debug_lock);
222}
223
224void o2net_debug_del_sc(struct o2net_sock_container *sc)
225{
226 spin_lock(&o2net_debug_lock);
227 list_del_init(&sc->sc_net_debug_item);
228 spin_unlock(&o2net_debug_lock);
229}
230
231static struct o2net_sock_container
232 *next_sc(struct o2net_sock_container *sc_start)
233{
234 struct o2net_sock_container *sc, *ret = NULL;
235
236 assert_spin_locked(&o2net_debug_lock);
237
238 list_for_each_entry(sc, &sc_start->sc_net_debug_item,
239 sc_net_debug_item) {
240
241 if (&sc->sc_net_debug_item == &sock_containers)
242 break;
243
244
245 if (sc->sc_page != NULL) {
246 ret = sc;
247 break;
248 }
249 }
250
251 return ret;
252}
253
254static void *sc_seq_start(struct seq_file *seq, loff_t *pos)
255{
256 struct o2net_sock_container *sc, *dummy_sc = seq->private;
257
258 spin_lock(&o2net_debug_lock);
259 sc = next_sc(dummy_sc);
260 spin_unlock(&o2net_debug_lock);
261
262 return sc;
263}
264
265static void *sc_seq_next(struct seq_file *seq, void *v, loff_t *pos)
266{
267 struct o2net_sock_container *sc, *dummy_sc = seq->private;
268
269 spin_lock(&o2net_debug_lock);
270 sc = next_sc(dummy_sc);
271 list_del_init(&dummy_sc->sc_net_debug_item);
272 if (sc)
273 list_add(&dummy_sc->sc_net_debug_item, &sc->sc_net_debug_item);
274 spin_unlock(&o2net_debug_lock);
275
276 return sc;
277}
278
279#define TV_SEC_USEC(TV) TV.tv_sec, (long)TV.tv_usec
280
281static int sc_seq_show(struct seq_file *seq, void *v)
282{
283 struct o2net_sock_container *sc, *dummy_sc = seq->private;
284
285 spin_lock(&o2net_debug_lock);
286 sc = next_sc(dummy_sc);
287
288 if (sc != NULL) {
289 struct inet_sock *inet = NULL;
290
291 __be32 saddr = 0, daddr = 0;
292 __be16 sport = 0, dport = 0;
293
294 if (sc->sc_sock) {
295 inet = inet_sk(sc->sc_sock->sk);
296
297 saddr = (__force __be32)inet->saddr;
298 daddr = (__force __be32)inet->daddr;
299 sport = (__force __be16)inet->sport;
300 dport = (__force __be16)inet->dport;
301 }
302
303
304
305 seq_printf(seq, "%p:\n"
306 " krefs: %d\n"
307 " sock: %pI4:%u -> "
308 "%pI4:%u\n"
309 " remote node: %s\n"
310 " page off: %zu\n"
311 " handshake ok: %u\n"
312 " timer: %lu.%ld\n"
313 " data ready: %lu.%ld\n"
314 " advance start: %lu.%ld\n"
315 " advance stop: %lu.%ld\n"
316 " func start: %lu.%ld\n"
317 " func stop: %lu.%ld\n"
318 " func key: %u\n"
319 " func type: %u\n",
320 sc,
321 atomic_read(&sc->sc_kref.refcount),
322 &saddr, inet ? ntohs(sport) : 0,
323 &daddr, inet ? ntohs(dport) : 0,
324 sc->sc_node->nd_name,
325 sc->sc_page_off,
326 sc->sc_handshake_ok,
327 TV_SEC_USEC(sc->sc_tv_timer),
328 TV_SEC_USEC(sc->sc_tv_data_ready),
329 TV_SEC_USEC(sc->sc_tv_advance_start),
330 TV_SEC_USEC(sc->sc_tv_advance_stop),
331 TV_SEC_USEC(sc->sc_tv_func_start),
332 TV_SEC_USEC(sc->sc_tv_func_stop),
333 sc->sc_msg_key,
334 sc->sc_msg_type);
335 }
336
337
338 spin_unlock(&o2net_debug_lock);
339
340 return 0;
341}
342
343static void sc_seq_stop(struct seq_file *seq, void *v)
344{
345}
346
347static const struct seq_operations sc_seq_ops = {
348 .start = sc_seq_start,
349 .next = sc_seq_next,
350 .stop = sc_seq_stop,
351 .show = sc_seq_show,
352};
353
354static int sc_fop_open(struct inode *inode, struct file *file)
355{
356 struct o2net_sock_container *dummy_sc;
357 struct seq_file *seq;
358 int ret;
359
360 dummy_sc = kmalloc(sizeof(struct o2net_sock_container), GFP_KERNEL);
361 if (dummy_sc == NULL) {
362 ret = -ENOMEM;
363 goto out;
364 }
365 dummy_sc->sc_page = NULL;
366
367 ret = seq_open(file, &sc_seq_ops);
368 if (ret)
369 goto out;
370
371 seq = file->private_data;
372 seq->private = dummy_sc;
373 o2net_debug_add_sc(dummy_sc);
374
375 dummy_sc = NULL;
376
377out:
378 kfree(dummy_sc);
379 return ret;
380}
381
382static int sc_fop_release(struct inode *inode, struct file *file)
383{
384 struct seq_file *seq = file->private_data;
385 struct o2net_sock_container *dummy_sc = seq->private;
386
387 o2net_debug_del_sc(dummy_sc);
388 return seq_release_private(inode, file);
389}
390
391static const struct file_operations sc_seq_fops = {
392 .open = sc_fop_open,
393 .read = seq_read,
394 .llseek = seq_lseek,
395 .release = sc_fop_release,
396};
397
398int o2net_debugfs_init(void)
399{
400 o2net_dentry = debugfs_create_dir(O2NET_DEBUG_DIR, NULL);
401 if (!o2net_dentry) {
402 mlog_errno(-ENOMEM);
403 goto bail;
404 }
405
406 nst_dentry = debugfs_create_file(NST_DEBUG_NAME, S_IFREG|S_IRUSR,
407 o2net_dentry, NULL,
408 &nst_seq_fops);
409 if (!nst_dentry) {
410 mlog_errno(-ENOMEM);
411 goto bail;
412 }
413
414 sc_dentry = debugfs_create_file(SC_DEBUG_NAME, S_IFREG|S_IRUSR,
415 o2net_dentry, NULL,
416 &sc_seq_fops);
417 if (!sc_dentry) {
418 mlog_errno(-ENOMEM);
419 goto bail;
420 }
421
422 return 0;
423bail:
424 if (sc_dentry)
425 debugfs_remove(sc_dentry);
426 if (nst_dentry)
427 debugfs_remove(nst_dentry);
428 if (o2net_dentry)
429 debugfs_remove(o2net_dentry);
430 return -ENOMEM;
431}
432
433void o2net_debugfs_exit(void)
434{
435 if (sc_dentry)
436 debugfs_remove(sc_dentry);
437 if (nst_dentry)
438 debugfs_remove(nst_dentry);
439 if (o2net_dentry)
440 debugfs_remove(o2net_dentry);
441}
442
443#endif
444
