summaryrefslogtreecommitdiff
path: root/net/kcm/kcmproc.c
blob: 1fac92543094f1b8e3cd6cc2eac42d925fbca070 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
// SPDX-License-Identifier: GPL-2.0
#include <linux/in.h>
#include <linux/inet.h>
#include <linux/list.h>
#include <linux/module.h>
#include <linux/net.h>
#include <linux/proc_fs.h>
#include <linux/rculist.h>
#include <linux/seq_file.h>
#include <linux/socket.h>
#include <net/inet_sock.h>
#include <net/kcm.h>
#include <net/net_namespace.h>
#include <net/netns/generic.h>
#include <net/tcp.h>

#ifdef CONFIG_PROC_FS
struct kcm_seq_muxinfo {
	char				*name;
	const struct file_operations	*seq_fops;
	const struct seq_operations	seq_ops;
};

static struct kcm_mux *kcm_get_first(struct seq_file *seq)
{
	struct net *net = seq_file_net(seq);
	struct kcm_net *knet = net_generic(net, kcm_net_id);

	return list_first_or_null_rcu(&knet->mux_list,
				      struct kcm_mux, kcm_mux_list);
}

static struct kcm_mux *kcm_get_next(struct kcm_mux *mux)
{
	struct kcm_net *knet = mux->knet;

	return list_next_or_null_rcu(&knet->mux_list, &mux->kcm_mux_list,
				     struct kcm_mux, kcm_mux_list);
}

static struct kcm_mux *kcm_get_idx(struct seq_file *seq, loff_t pos)
{
	struct net *net = seq_file_net(seq);
	struct kcm_net *knet = net_generic(net, kcm_net_id);
	struct kcm_mux *m;

	list_for_each_entry_rcu(m, &knet->mux_list, kcm_mux_list) {
		if (!pos)
			return m;
		--pos;
	}
	return NULL;
}

static void *kcm_seq_next(struct seq_file *seq, void *v, loff_t *pos)
{
	void *p;

	if (v == SEQ_START_TOKEN)
		p = kcm_get_first(seq);
	else
		p = kcm_get_next(v);
	++*pos;
	return p;
}

static void *kcm_seq_start(struct seq_file *seq, loff_t *pos)
	__acquires(rcu)
{
	rcu_read_lock();

	if (!*pos)
		return SEQ_START_TOKEN;
	else
		return kcm_get_idx(seq, *pos - 1);
}

static void kcm_seq_stop(struct seq_file *seq, void *v)
	__releases(rcu)
{
	rcu_read_unlock();
}

struct kcm_proc_mux_state {
	struct seq_net_private p;
	int idx;
};

static int kcm_seq_open(struct inode *inode, struct file *file)
{
	struct kcm_seq_muxinfo *muxinfo = PDE_DATA(inode);

	return seq_open_net(inode, file, &muxinfo->seq_ops,
			   sizeof(struct kcm_proc_mux_state));
}

static void kcm_format_mux_header(struct seq_file *seq)
{
	struct net *net = seq_file_net(seq);
	struct kcm_net *knet = net_generic(net, kcm_net_id);

	seq_printf(seq,
		   "*** KCM statistics (%d MUX) ****\n",
		   knet->count);

	seq_printf(seq,
		   "%-14s %-10s %-16s %-10s %-16s %-8s %-8s %-8s %-8s %s",
		   "Object",
		   "RX-Msgs",
		   "RX-Bytes",
		   "TX-Msgs",
		   "TX-Bytes",
		   "Recv-Q",
		   "Rmem",
		   "Send-Q",
		   "Smem",
		   "Status");

	/* XXX: pdsts header stuff here */
	seq_puts(seq, "\n");
}

static void kcm_format_sock(struct kcm_sock *kcm, struct seq_file *seq,
			    int i, int *len)
{
	seq_printf(seq,
		   "   kcm-%-7u %-10llu %-16llu %-10llu %-16llu %-8d %-8d %-8d %-8s ",
		   kcm->index,
		   kcm->stats.rx_msgs,
		   kcm->stats.rx_bytes,
		   kcm->stats.tx_msgs,
		   kcm->stats.tx_bytes,
		   kcm->sk.sk_receive_queue.qlen,
		   sk_rmem_alloc_get(&kcm->sk),
		   kcm->sk.sk_write_queue.qlen,
		   "-");

	if (kcm->tx_psock)
		seq_printf(seq, "Psck-%u ", kcm->tx_psock->index);

	if (kcm->tx_wait)
		seq_puts(seq, "TxWait ");

	if (kcm->tx_wait_more)
		seq_puts(seq, "WMore ");

	if (kcm->rx_wait)
		seq_puts(seq, "RxWait ");

	seq_puts(seq, "\n");
}

static void kcm_format_psock(struct kcm_psock *psock, struct seq_file *seq,
			     int i, int *len)
{
	seq_printf(seq,
		   "   psock-%-5u %-10llu %-16llu %-10llu %-16llu %-8d %-8d %-8d %-8d ",
		   psock->index,
		   psock->strp.stats.msgs,
		   psock->strp.stats.bytes,
		   psock->stats.tx_msgs,
		   psock->stats.tx_bytes,
		   psock->sk->sk_receive_queue.qlen,
		   atomic_read(&psock->sk->sk_rmem_alloc),
		   psock->sk->sk_write_queue.qlen,
		   refcount_read(&psock->sk->sk_wmem_alloc));

	if (psock->done)
		seq_puts(seq, "Done ");

	if (psock->tx_stopped)
		seq_puts(seq, "TxStop ");

	if (psock->strp.stopped)
		seq_puts(seq, "RxStop ");

	if (psock->tx_kcm)
		seq_printf(seq, "Rsvd-%d ", psock->tx_kcm->index);

	if (!psock->strp.paused && !psock->ready_rx_msg) {
		if (psock->sk->sk_receive_queue.qlen) {
			if (psock->strp.need_bytes)
				seq_printf(seq, "RxWait=%u ",
					   psock->strp.need_bytes);
			else
				seq_printf(seq, "RxWait ");
		}
	} else  {
		if (psock->strp.paused)
			seq_puts(seq, "RxPause ");

		if (psock->ready_rx_msg)
			seq_puts(seq, "RdyRx ");
	}

	seq_puts(seq, "\n");
}

static void
kcm_format_mux(struct kcm_mux *mux, loff_t idx, struct seq_file *seq)
{
	int i, len;
	struct kcm_sock *kcm;
	struct kcm_psock *psock;

	/* mux information */
	seq_printf(seq,
		   "%-6s%-8s %-10llu %-16llu %-10llu %-16llu %-8s %-8s %-8s %-8s ",
		   "mux", "",
		   mux->stats.rx_msgs,
		   mux->stats.rx_bytes,
		   mux->stats.tx_msgs,
		   mux->stats.tx_bytes,
		   "-", "-", "-", "-");

	seq_printf(seq, "KCMs: %d, Psocks %d\n",
		   mux->kcm_socks_cnt, mux->psocks_cnt);

	/* kcm sock information */
	i = 0;
	spin_lock_bh(&mux->lock);
	list_for_each_entry(kcm, &mux->kcm_socks, kcm_sock_list) {
		kcm_format_sock(kcm, seq, i, &len);
		i++;
	}
	i = 0;
	list_for_each_entry(psock, &mux->psocks, psock_list) {
		kcm_format_psock(psock, seq, i, &len);
		i++;
	}
	spin_unlock_bh(&mux->lock);
}

static int kcm_seq_show(struct seq_file *seq, void *v)
{
	struct kcm_proc_mux_state *mux_state;

	mux_state = seq->private;
	if (v == SEQ_START_TOKEN) {
		mux_state->idx = 0;
		kcm_format_mux_header(seq);
	} else {
		kcm_format_mux(v, mux_state->idx, seq);
		mux_state->idx++;
	}
	return 0;
}

static const struct file_operations kcm_seq_fops = {
	.open		= kcm_seq_open,
	.read		= seq_read,
	.llseek		= seq_lseek,
	.release	= seq_release_net,
};

static struct kcm_seq_muxinfo kcm_seq_muxinfo = {
	.name		= "kcm",
	.seq_fops	= &kcm_seq_fops,
	.seq_ops	= {
		.show	= kcm_seq_show,
		.start	= kcm_seq_start,
		.next	= kcm_seq_next,
		.stop	= kcm_seq_stop,
	}
};

static int kcm_proc_register(struct net *net, struct kcm_seq_muxinfo *muxinfo)
{
	struct proc_dir_entry *p;
	int rc = 0;

	p = proc_create_data(muxinfo->name, 0444, net->proc_net,
			     muxinfo->seq_fops, muxinfo);
	if (!p)
		rc = -ENOMEM;
	return rc;
}
EXPORT_SYMBOL(kcm_proc_register);

static void kcm_proc_unregister(struct net *net,
				struct kcm_seq_muxinfo *muxinfo)
{
	remove_proc_entry(muxinfo->name, net->proc_net);
}
EXPORT_SYMBOL(kcm_proc_unregister);

static int kcm_stats_seq_show(struct seq_file *seq, void *v)
{
	struct kcm_psock_stats psock_stats;
	struct kcm_mux_stats mux_stats;
	struct strp_aggr_stats strp_stats;
	struct kcm_mux *mux;
	struct kcm_psock *psock;
	struct net *net = seq->private;
	struct kcm_net *knet = net_generic(net, kcm_net_id);

	memset(&mux_stats, 0, sizeof(mux_stats));
	memset(&psock_stats, 0, sizeof(psock_stats));
	memset(&strp_stats, 0, sizeof(strp_stats));

	mutex_lock(&knet->mutex);

	aggregate_mux_stats(&knet->aggregate_mux_stats, &mux_stats);
	aggregate_psock_stats(&knet->aggregate_psock_stats,
			      &psock_stats);
	aggregate_strp_stats(&knet->aggregate_strp_stats,
			     &strp_stats);

	list_for_each_entry_rcu(mux, &knet->mux_list, kcm_mux_list) {
		spin_lock_bh(&mux->lock);
		aggregate_mux_stats(&mux->stats, &mux_stats);
		aggregate_psock_stats(&mux->aggregate_psock_stats,
				      &psock_stats);
		aggregate_strp_stats(&mux->aggregate_strp_stats,
				     &strp_stats);
		list_for_each_entry(psock, &mux->psocks, psock_list) {
			aggregate_psock_stats(&psock->stats, &psock_stats);
			save_strp_stats(&psock->strp, &strp_stats);
		}

		spin_unlock_bh(&mux->lock);
	}

	mutex_unlock(&knet->mutex);

	seq_printf(seq,
		   "%-8s %-10s %-16s %-10s %-16s %-10s %-10s %-10s %-10s %-10s\n",
		   "MUX",
		   "RX-Msgs",
		   "RX-Bytes",
		   "TX-Msgs",
		   "TX-Bytes",
		   "TX-Retries",
		   "Attach",
		   "Unattach",
		   "UnattchRsvd",
		   "RX-RdyDrops");

	seq_printf(seq,
		   "%-8s %-10llu %-16llu %-10llu %-16llu %-10u %-10u %-10u %-10u %-10u\n",
		   "",
		   mux_stats.rx_msgs,
		   mux_stats.rx_bytes,
		   mux_stats.tx_msgs,
		   mux_stats.tx_bytes,
		   mux_stats.tx_retries,
		   mux_stats.psock_attach,
		   mux_stats.psock_unattach_rsvd,
		   mux_stats.psock_unattach,
		   mux_stats.rx_ready_drops);

	seq_printf(seq,
		   "%-8s %-10s %-16s %-10s %-16s %-10s %-10s %-10s %-10s %-10s %-10s %-10s %-10s %-10s %-10s %-10s\n",
		   "Psock",
		   "RX-Msgs",
		   "RX-Bytes",
		   "TX-Msgs",
		   "TX-Bytes",
		   "Reserved",
		   "Unreserved",
		   "RX-Aborts",
		   "RX-Intr",
		   "RX-Unrecov",
		   "RX-MemFail",
		   "RX-NeedMor",
		   "RX-BadLen",
		   "RX-TooBig",
		   "RX-Timeout",
		   "TX-Aborts");

	seq_printf(seq,
		   "%-8s %-10llu %-16llu %-10llu %-16llu %-10llu %-10llu %-10u %-10u %-10u %-10u %-10u %-10u %-10u %-10u %-10u\n",
		   "",
		   strp_stats.msgs,
		   strp_stats.bytes,
		   psock_stats.tx_msgs,
		   psock_stats.tx_bytes,
		   psock_stats.reserved,
		   psock_stats.unreserved,
		   strp_stats.aborts,
		   strp_stats.interrupted,
		   strp_stats.unrecov_intr,
		   strp_stats.mem_fail,
		   strp_stats.need_more_hdr,
		   strp_stats.bad_hdr_len,
		   strp_stats.msg_too_big,
		   strp_stats.msg_timeouts,
		   psock_stats.tx_aborts);

	return 0;
}

static int kcm_stats_seq_open(struct inode *inode, struct file *file)
{
	return single_open_net(inode, file, kcm_stats_seq_show);
}

static const struct file_operations kcm_stats_seq_fops = {
	.open    = kcm_stats_seq_open,
	.read    = seq_read,
	.llseek  = seq_lseek,
	.release = single_release_net,
};

static int kcm_proc_init_net(struct net *net)
{
	int err;

	if (!proc_create("kcm_stats", 0444, net->proc_net,
			 &kcm_stats_seq_fops)) {
		err = -ENOMEM;
		goto out_kcm_stats;
	}

	err = kcm_proc_register(net, &kcm_seq_muxinfo);
	if (err)
		goto out_kcm;

	return 0;

out_kcm:
	remove_proc_entry("kcm_stats", net->proc_net);
out_kcm_stats:
	return err;
}

static void kcm_proc_exit_net(struct net *net)
{
	kcm_proc_unregister(net, &kcm_seq_muxinfo);
	remove_proc_entry("kcm_stats", net->proc_net);
}

static struct pernet_operations kcm_net_ops = {
	.init = kcm_proc_init_net,
	.exit = kcm_proc_exit_net,
};

int __init kcm_proc_init(void)
{
	return register_pernet_subsys(&kcm_net_ops);
}

void __exit kcm_proc_exit(void)
{
	unregister_pernet_subsys(&kcm_net_ops);
}

#endif /* CONFIG_PROC_FS */