1
2#include <linux/in.h>
3#include <linux/inet.h>
4#include <linux/list.h>
5#include <linux/module.h>
6#include <linux/net.h>
7#include <linux/proc_fs.h>
8#include <linux/rculist.h>
9#include <linux/seq_file.h>
10#include <linux/socket.h>
11#include <net/inet_sock.h>
12#include <net/kcm.h>
13#include <net/net_namespace.h>
14#include <net/netns/generic.h>
15#include <net/tcp.h>
16
17#ifdef CONFIG_PROC_FS
18static struct kcm_mux *kcm_get_first(struct seq_file *seq)
19{
20 struct net *net = seq_file_net(seq);
21 struct kcm_net *knet = net_generic(net, kcm_net_id);
22
23 return list_first_or_null_rcu(&knet->mux_list,
24 struct kcm_mux, kcm_mux_list);
25}
26
27static struct kcm_mux *kcm_get_next(struct kcm_mux *mux)
28{
29 struct kcm_net *knet = mux->knet;
30
31 return list_next_or_null_rcu(&knet->mux_list, &mux->kcm_mux_list,
32 struct kcm_mux, kcm_mux_list);
33}
34
35static struct kcm_mux *kcm_get_idx(struct seq_file *seq, loff_t pos)
36{
37 struct net *net = seq_file_net(seq);
38 struct kcm_net *knet = net_generic(net, kcm_net_id);
39 struct kcm_mux *m;
40
41 list_for_each_entry_rcu(m, &knet->mux_list, kcm_mux_list) {
42 if (!pos)
43 return m;
44 --pos;
45 }
46 return NULL;
47}
48
49static void *kcm_seq_next(struct seq_file *seq, void *v, loff_t *pos)
50{
51 void *p;
52
53 if (v == SEQ_START_TOKEN)
54 p = kcm_get_first(seq);
55 else
56 p = kcm_get_next(v);
57 ++*pos;
58 return p;
59}
60
61static void *kcm_seq_start(struct seq_file *seq, loff_t *pos)
62 __acquires(rcu)
63{
64 rcu_read_lock();
65
66 if (!*pos)
67 return SEQ_START_TOKEN;
68 else
69 return kcm_get_idx(seq, *pos - 1);
70}
71
72static void kcm_seq_stop(struct seq_file *seq, void *v)
73 __releases(rcu)
74{
75 rcu_read_unlock();
76}
77
78struct kcm_proc_mux_state {
79 struct seq_net_private p;
80 int idx;
81};
82
83static void kcm_format_mux_header(struct seq_file *seq)
84{
85 struct net *net = seq_file_net(seq);
86 struct kcm_net *knet = net_generic(net, kcm_net_id);
87
88 seq_printf(seq,
89 "*** KCM statistics (%d MUX) ****\n",
90 knet->count);
91
92 seq_printf(seq,
93 "%-14s %-10s %-16s %-10s %-16s %-8s %-8s %-8s %-8s %s",
94 "Object",
95 "RX-Msgs",
96 "RX-Bytes",
97 "TX-Msgs",
98 "TX-Bytes",
99 "Recv-Q",
100 "Rmem",
101 "Send-Q",
102 "Smem",
103 "Status");
104
105
106 seq_puts(seq, "\n");
107}
108
109static void kcm_format_sock(struct kcm_sock *kcm, struct seq_file *seq,
110 int i, int *len)
111{
112 seq_printf(seq,
113 " kcm-%-7u %-10llu %-16llu %-10llu %-16llu %-8d %-8d %-8d %-8s ",
114 kcm->index,
115 kcm->stats.rx_msgs,
116 kcm->stats.rx_bytes,
117 kcm->stats.tx_msgs,
118 kcm->stats.tx_bytes,
119 kcm->sk.sk_receive_queue.qlen,
120 sk_rmem_alloc_get(&kcm->sk),
121 kcm->sk.sk_write_queue.qlen,
122 "-");
123
124 if (kcm->tx_psock)
125 seq_printf(seq, "Psck-%u ", kcm->tx_psock->index);
126
127 if (kcm->tx_wait)
128 seq_puts(seq, "TxWait ");
129
130 if (kcm->tx_wait_more)
131 seq_puts(seq, "WMore ");
132
133 if (kcm->rx_wait)
134 seq_puts(seq, "RxWait ");
135
136 seq_puts(seq, "\n");
137}
138
139static void kcm_format_psock(struct kcm_psock *psock, struct seq_file *seq,
140 int i, int *len)
141{
142 seq_printf(seq,
143 " psock-%-5u %-10llu %-16llu %-10llu %-16llu %-8d %-8d %-8d %-8d ",
144 psock->index,
145 psock->strp.stats.msgs,
146 psock->strp.stats.bytes,
147 psock->stats.tx_msgs,
148 psock->stats.tx_bytes,
149 psock->sk->sk_receive_queue.qlen,
150 atomic_read(&psock->sk->sk_rmem_alloc),
151 psock->sk->sk_write_queue.qlen,
152 refcount_read(&psock->sk->sk_wmem_alloc));
153
154 if (psock->done)
155 seq_puts(seq, "Done ");
156
157 if (psock->tx_stopped)
158 seq_puts(seq, "TxStop ");
159
160 if (psock->strp.stopped)
161 seq_puts(seq, "RxStop ");
162
163 if (psock->tx_kcm)
164 seq_printf(seq, "Rsvd-%d ", psock->tx_kcm->index);
165
166 if (!psock->strp.paused && !psock->ready_rx_msg) {
167 if (psock->sk->sk_receive_queue.qlen) {
168 if (psock->strp.need_bytes)
169 seq_printf(seq, "RxWait=%u ",
170 psock->strp.need_bytes);
171 else
172 seq_printf(seq, "RxWait ");
173 }
174 } else {
175 if (psock->strp.paused)
176 seq_puts(seq, "RxPause ");
177
178 if (psock->ready_rx_msg)
179 seq_puts(seq, "RdyRx ");
180 }
181
182 seq_puts(seq, "\n");
183}
184
185static void
186kcm_format_mux(struct kcm_mux *mux, loff_t idx, struct seq_file *seq)
187{
188 int i, len;
189 struct kcm_sock *kcm;
190 struct kcm_psock *psock;
191
192
193 seq_printf(seq,
194 "%-6s%-8s %-10llu %-16llu %-10llu %-16llu %-8s %-8s %-8s %-8s ",
195 "mux", "",
196 mux->stats.rx_msgs,
197 mux->stats.rx_bytes,
198 mux->stats.tx_msgs,
199 mux->stats.tx_bytes,
200 "-", "-", "-", "-");
201
202 seq_printf(seq, "KCMs: %d, Psocks %d\n",
203 mux->kcm_socks_cnt, mux->psocks_cnt);
204
205
206 i = 0;
207 spin_lock_bh(&mux->lock);
208 list_for_each_entry(kcm, &mux->kcm_socks, kcm_sock_list) {
209 kcm_format_sock(kcm, seq, i, &len);
210 i++;
211 }
212 i = 0;
213 list_for_each_entry(psock, &mux->psocks, psock_list) {
214 kcm_format_psock(psock, seq, i, &len);
215 i++;
216 }
217 spin_unlock_bh(&mux->lock);
218}
219
220static int kcm_seq_show(struct seq_file *seq, void *v)
221{
222 struct kcm_proc_mux_state *mux_state;
223
224 mux_state = seq->private;
225 if (v == SEQ_START_TOKEN) {
226 mux_state->idx = 0;
227 kcm_format_mux_header(seq);
228 } else {
229 kcm_format_mux(v, mux_state->idx, seq);
230 mux_state->idx++;
231 }
232 return 0;
233}
234
235static const struct seq_operations kcm_seq_ops = {
236 .show = kcm_seq_show,
237 .start = kcm_seq_start,
238 .next = kcm_seq_next,
239 .stop = kcm_seq_stop,
240};
241
242static int kcm_stats_seq_show(struct seq_file *seq, void *v)
243{
244 struct kcm_psock_stats psock_stats;
245 struct kcm_mux_stats mux_stats;
246 struct strp_aggr_stats strp_stats;
247 struct kcm_mux *mux;
248 struct kcm_psock *psock;
249 struct net *net = seq->private;
250 struct kcm_net *knet = net_generic(net, kcm_net_id);
251
252 memset(&mux_stats, 0, sizeof(mux_stats));
253 memset(&psock_stats, 0, sizeof(psock_stats));
254 memset(&strp_stats, 0, sizeof(strp_stats));
255
256 mutex_lock(&knet->mutex);
257
258 aggregate_mux_stats(&knet->aggregate_mux_stats, &mux_stats);
259 aggregate_psock_stats(&knet->aggregate_psock_stats,
260 &psock_stats);
261 aggregate_strp_stats(&knet->aggregate_strp_stats,
262 &strp_stats);
263
264 list_for_each_entry(mux, &knet->mux_list, kcm_mux_list) {
265 spin_lock_bh(&mux->lock);
266 aggregate_mux_stats(&mux->stats, &mux_stats);
267 aggregate_psock_stats(&mux->aggregate_psock_stats,
268 &psock_stats);
269 aggregate_strp_stats(&mux->aggregate_strp_stats,
270 &strp_stats);
271 list_for_each_entry(psock, &mux->psocks, psock_list) {
272 aggregate_psock_stats(&psock->stats, &psock_stats);
273 save_strp_stats(&psock->strp, &strp_stats);
274 }
275
276 spin_unlock_bh(&mux->lock);
277 }
278
279 mutex_unlock(&knet->mutex);
280
281 seq_printf(seq,
282 "%-8s %-10s %-16s %-10s %-16s %-10s %-10s %-10s %-10s %-10s\n",
283 "MUX",
284 "RX-Msgs",
285 "RX-Bytes",
286 "TX-Msgs",
287 "TX-Bytes",
288 "TX-Retries",
289 "Attach",
290 "Unattach",
291 "UnattchRsvd",
292 "RX-RdyDrops");
293
294 seq_printf(seq,
295 "%-8s %-10llu %-16llu %-10llu %-16llu %-10u %-10u %-10u %-10u %-10u\n",
296 "",
297 mux_stats.rx_msgs,
298 mux_stats.rx_bytes,
299 mux_stats.tx_msgs,
300 mux_stats.tx_bytes,
301 mux_stats.tx_retries,
302 mux_stats.psock_attach,
303 mux_stats.psock_unattach_rsvd,
304 mux_stats.psock_unattach,
305 mux_stats.rx_ready_drops);
306
307 seq_printf(seq,
308 "%-8s %-10s %-16s %-10s %-16s %-10s %-10s %-10s %-10s %-10s %-10s %-10s %-10s %-10s %-10s %-10s\n",
309 "Psock",
310 "RX-Msgs",
311 "RX-Bytes",
312 "TX-Msgs",
313 "TX-Bytes",
314 "Reserved",
315 "Unreserved",
316 "RX-Aborts",
317 "RX-Intr",
318 "RX-Unrecov",
319 "RX-MemFail",
320 "RX-NeedMor",
321 "RX-BadLen",
322 "RX-TooBig",
323 "RX-Timeout",
324 "TX-Aborts");
325
326 seq_printf(seq,
327 "%-8s %-10llu %-16llu %-10llu %-16llu %-10llu %-10llu %-10u %-10u %-10u %-10u %-10u %-10u %-10u %-10u %-10u\n",
328 "",
329 strp_stats.msgs,
330 strp_stats.bytes,
331 psock_stats.tx_msgs,
332 psock_stats.tx_bytes,
333 psock_stats.reserved,
334 psock_stats.unreserved,
335 strp_stats.aborts,
336 strp_stats.interrupted,
337 strp_stats.unrecov_intr,
338 strp_stats.mem_fail,
339 strp_stats.need_more_hdr,
340 strp_stats.bad_hdr_len,
341 strp_stats.msg_too_big,
342 strp_stats.msg_timeouts,
343 psock_stats.tx_aborts);
344
345 return 0;
346}
347
348static int kcm_proc_init_net(struct net *net)
349{
350 if (!proc_create_net_single("kcm_stats", 0444, net->proc_net,
351 kcm_stats_seq_show, NULL))
352 goto out_kcm_stats;
353
354 if (!proc_create_net("kcm", 0444, net->proc_net, &kcm_seq_ops,
355 sizeof(struct kcm_proc_mux_state)))
356 goto out_kcm;
357
358 return 0;
359
360out_kcm:
361 remove_proc_entry("kcm_stats", net->proc_net);
362out_kcm_stats:
363 return -ENOMEM;
364}
365
366static void kcm_proc_exit_net(struct net *net)
367{
368 remove_proc_entry("kcm", net->proc_net);
369 remove_proc_entry("kcm_stats", net->proc_net);
370}
371
372static struct pernet_operations kcm_net_ops = {
373 .init = kcm_proc_init_net,
374 .exit = kcm_proc_exit_net,
375};
376
377int __init kcm_proc_init(void)
378{
379 return register_pernet_subsys(&kcm_net_ops);
380}
381
382void __exit kcm_proc_exit(void)
383{
384 unregister_pernet_subsys(&kcm_net_ops);
385}
386
387#endif
388
