~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

TOMOYO Linux Cross Reference
Linux/fs/ocfs2/cluster/netdebug.c

Version: ~ [ linux-5.12-rc6 ] ~ [ linux-5.11.13 ] ~ [ linux-5.10.29 ] ~ [ linux-5.9.16 ] ~ [ linux-5.8.18 ] ~ [ linux-5.7.19 ] ~ [ linux-5.6.19 ] ~ [ linux-5.5.19 ] ~ [ linux-5.4.111 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.186 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.230 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.266 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.266 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.18.140 ] ~ [ linux-3.16.85 ] ~ [ linux-3.14.79 ] ~ [ linux-3.12.74 ] ~ [ linux-3.10.108 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  1 // SPDX-License-Identifier: GPL-2.0-or-later
  2 /* -*- mode: c; c-basic-offset: 8; -*-
  3  * vim: noexpandtab sw=8 ts=8 sts=0:
  4  *
  5  * netdebug.c
  6  *
  7  * debug functionality for o2net
  8  *
  9  * Copyright (C) 2005, 2008 Oracle.  All rights reserved.
 10  */
 11 
 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 
 40 static struct dentry *o2net_dentry;
 41 
 42 static DEFINE_SPINLOCK(o2net_debug_lock);
 43 
 44 static LIST_HEAD(sock_containers);
 45 static LIST_HEAD(send_tracking);
 46 
 47 void 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 
 54 void 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 
 62 static 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                 /* discover the head of the list */
 72                 if (&nst->st_net_debug_item == &send_tracking)
 73                         break;
 74 
 75                 /* use st_task to detect real nsts in the list */
 76                 if (nst->st_task != NULL) {
 77                         ret = nst;
 78                         break;
 79                 }
 80         }
 81 
 82         return ret;
 83 }
 84 
 85 static 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 
 96 static 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; /* unused, just needs to be null when done */
109 }
110 
111 static 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         /* get_task_comm isn't exported.  oh well. */
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 
149 out:
150         spin_unlock(&o2net_debug_lock);
151 
152         return 0;
153 }
154 
155 static void nst_seq_stop(struct seq_file *seq, void *v)
156 {
157 }
158 
159 static 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 
166 static 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 
178 static 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 
187 static 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 
194 void 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 
201 void 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 
208 struct o2net_sock_debug {
209         int dbg_ctxt;
210         struct o2net_sock_container *dbg_sock;
211 };
212 
213 static 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                 /* discover the head of the list miscast as a sc */
223                 if (&sc->sc_net_debug_item == &sock_containers)
224                         break;
225 
226                 /* use sc_page to detect real scs in the list */
227                 if (sc->sc_page != NULL) {
228                         ret = sc;
229                         break;
230                 }
231         }
232 
233         return ret;
234 }
235 
236 static 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 
248 static 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; /* unused, just needs to be null when done */
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 /* So that debugfs.ocfs2 can determine which format is being used */
280 #define O2NET_STATS_STR_VERSION         1
281 static 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 
296 static 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                 /* the stack's structs aren't sparse endian clean */
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         /* XXX sigh, inet-> doesn't have sparse annotation so any
316          * use of it here generates a warning with -Wbitwise */
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 
349 static 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 
369 static void sc_seq_stop(struct seq_file *seq, void *v)
370 {
371 }
372 
373 static 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 
380 static 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 
403 static 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 
414 static int stats_fop_open(struct inode *inode, struct file *file)
415 {
416         return sc_common_open(file, SHOW_SOCK_STATS);
417 }
418 
419 static 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 
426 static int sc_fop_open(struct inode *inode, struct file *file)
427 {
428         return sc_common_open(file, SHOW_SOCK_CONTAINERS);
429 }
430 
431 static 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 
438 static 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 += snprintf(buf + out, PAGE_SIZE - out, "%d ", i);
447         out += snprintf(buf + out, PAGE_SIZE - out, "\n");
448 
449         return out;
450 }
451 
452 static 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 
467 static int o2net_debug_release(struct inode *inode, struct file *file)
468 {
469         kfree(file->private_data);
470         return 0;
471 }
472 
473 static 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 
480 static 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 
487 void o2net_debugfs_exit(void)
488 {
489         debugfs_remove_recursive(o2net_dentry);
490 }
491 
492 void 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  /* CONFIG_DEBUG_FS */
509 

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | Wiki (Japanese) | Wiki (English) | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

osdn.jp