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
|
/*
* proc_llc.c - proc interface for LLC
*
* Copyright (c) 2001 by Jay Schulist <jschlst@samba.org>
* 2002-2003 by Arnaldo Carvalho de Melo <acme@conectiva.com.br>
*
* This program can be redistributed or modified under the terms of the
* GNU General Public License as published by the Free Software Foundation.
* This program is distributed without any warranty or implied warranty
* of merchantability or fitness for a particular purpose.
*
* See the GNU General Public License for more details.
*/
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/proc_fs.h>
#include <linux/errno.h>
#include <linux/seq_file.h>
#include <linux/export.h>
#include <net/net_namespace.h>
#include <net/sock.h>
#include <net/llc.h>
#include <net/llc_c_ac.h>
#include <net/llc_c_ev.h>
#include <net/llc_c_st.h>
#include <net/llc_conn.h>
static void llc_ui_format_mac(struct seq_file *seq, const u8 *addr)
{
seq_printf(seq, "%pM", addr);
}
static struct sock *llc_get_sk_idx(loff_t pos)
{
struct llc_sap *sap;
struct sock *sk = NULL;
int i;
list_for_each_entry_rcu(sap, &llc_sap_list, node) {
spin_lock_bh(&sap->sk_lock);
for (i = 0; i < LLC_SK_LADDR_HASH_ENTRIES; i++) {
struct hlist_nulls_head *head = &sap->sk_laddr_hash[i];
struct hlist_nulls_node *node;
sk_nulls_for_each(sk, node, head) {
if (!pos)
goto found; /* keep the lock */
--pos;
}
}
spin_unlock_bh(&sap->sk_lock);
}
sk = NULL;
found:
return sk;
}
static void *llc_seq_start(struct seq_file *seq, loff_t *pos) __acquires(RCU)
{
loff_t l = *pos;
rcu_read_lock_bh();
return l ? llc_get_sk_idx(--l) : SEQ_START_TOKEN;
}
static struct sock *laddr_hash_next(struct llc_sap *sap, int bucket)
{
struct hlist_nulls_node *node;
struct sock *sk = NULL;
while (++bucket < LLC_SK_LADDR_HASH_ENTRIES)
sk_nulls_for_each(sk, node, &sap->sk_laddr_hash[bucket])
goto out;
out:
return sk;
}
static void *llc_seq_next(struct seq_file *seq, void *v, loff_t *pos)
{
struct sock* sk, *next;
struct llc_sock *llc;
struct llc_sap *sap;
++*pos;
if (v == SEQ_START_TOKEN) {
sk = llc_get_sk_idx(0);
goto out;
}
sk = v;
next = sk_nulls_next(sk);
if (next) {
sk = next;
goto out;
}
llc = llc_sk(sk);
sap = llc->sap;
sk = laddr_hash_next(sap, llc_sk_laddr_hashfn(sap, &llc->laddr));
if (sk)
goto out;
spin_unlock_bh(&sap->sk_lock);
list_for_each_entry_continue_rcu(sap, &llc_sap_list, node) {
spin_lock_bh(&sap->sk_lock);
sk = laddr_hash_next(sap, -1);
if (sk)
break; /* keep the lock */
spin_unlock_bh(&sap->sk_lock);
}
out:
return sk;
}
static void llc_seq_stop(struct seq_file *seq, void *v)
{
if (v && v != SEQ_START_TOKEN) {
struct sock *sk = v;
struct llc_sock *llc = llc_sk(sk);
struct llc_sap *sap = llc->sap;
spin_unlock_bh(&sap->sk_lock);
}
rcu_read_unlock_bh();
}
static int llc_seq_socket_show(struct seq_file *seq, void *v)
{
struct sock* sk;
struct llc_sock *llc;
if (v == SEQ_START_TOKEN) {
seq_puts(seq, "SKt Mc local_mac_sap remote_mac_sap "
" tx_queue rx_queue st uid link\n");
goto out;
}
sk = v;
llc = llc_sk(sk);
/* FIXME: check if the address is multicast */
seq_printf(seq, "%2X %2X ", sk->sk_type, 0);
if (llc->dev)
llc_ui_format_mac(seq, llc->dev->dev_addr);
else {
u8 addr[6] = {0,0,0,0,0,0};
llc_ui_format_mac(seq, addr);
}
seq_printf(seq, "@%02X ", llc->sap->laddr.lsap);
llc_ui_format_mac(seq, llc->daddr.mac);
seq_printf(seq, "@%02X %8d %8d %2d %3u %4d\n", llc->daddr.lsap,
sk_wmem_alloc_get(sk),
sk_rmem_alloc_get(sk) - llc->copied_seq,
sk->sk_state,
from_kuid_munged(seq_user_ns(seq), sock_i_uid(sk)),
llc->link);
out:
return 0;
}
static const char *const llc_conn_state_names[] = {
[LLC_CONN_STATE_ADM] = "adm",
[LLC_CONN_STATE_SETUP] = "setup",
[LLC_CONN_STATE_NORMAL] = "normal",
[LLC_CONN_STATE_BUSY] = "busy",
[LLC_CONN_STATE_REJ] = "rej",
[LLC_CONN_STATE_AWAIT] = "await",
[LLC_CONN_STATE_AWAIT_BUSY] = "await_busy",
[LLC_CONN_STATE_AWAIT_REJ] = "await_rej",
[LLC_CONN_STATE_D_CONN] = "d_conn",
[LLC_CONN_STATE_RESET] = "reset",
[LLC_CONN_STATE_ERROR] = "error",
[LLC_CONN_STATE_TEMP] = "temp",
};
static int llc_seq_core_show(struct seq_file *seq, void *v)
{
struct sock* sk;
struct llc_sock *llc;
if (v == SEQ_START_TOKEN) {
seq_puts(seq, "Connection list:\n"
"dsap state retr txw rxw pf ff sf df rs cs "
"tack tpfc trs tbs blog busr\n");
goto out;
}
sk = v;
llc = llc_sk(sk);
seq_printf(seq, " %02X %-10s %3d %3d %3d %2d %2d %2d %2d %2d %2d "
"%4d %4d %3d %3d %4d %4d\n",
llc->daddr.lsap, llc_conn_state_names[llc->state],
llc->retry_count, llc->k, llc->rw, llc->p_flag, llc->f_flag,
llc->s_flag, llc->data_flag, llc->remote_busy_flag,
llc->cause_flag, timer_pending(&llc->ack_timer.timer),
timer_pending(&llc->pf_cycle_timer.timer),
timer_pending(&llc->rej_sent_timer.timer),
timer_pending(&llc->busy_state_timer.timer),
!!sk->sk_backlog.tail, !!sk->sk_lock.owned);
out:
return 0;
}
static const struct seq_operations llc_seq_socket_ops = {
.start = llc_seq_start,
.next = llc_seq_next,
.stop = llc_seq_stop,
.show = llc_seq_socket_show,
};
static const struct seq_operations llc_seq_core_ops = {
.start = llc_seq_start,
.next = llc_seq_next,
.stop = llc_seq_stop,
.show = llc_seq_core_show,
};
static struct proc_dir_entry *llc_proc_dir;
int __init llc_proc_init(void)
{
int rc = -ENOMEM;
struct proc_dir_entry *p;
llc_proc_dir = proc_mkdir("llc", init_net.proc_net);
if (!llc_proc_dir)
goto out;
p = proc_create_seq("socket", 0444, llc_proc_dir, &llc_seq_socket_ops);
if (!p)
goto out_socket;
p = proc_create_seq("core", 0444, llc_proc_dir, &llc_seq_core_ops);
if (!p)
goto out_core;
rc = 0;
out:
return rc;
out_core:
remove_proc_entry("socket", llc_proc_dir);
out_socket:
remove_proc_entry("llc", init_net.proc_net);
goto out;
}
void llc_proc_exit(void)
{
remove_proc_entry("socket", llc_proc_dir);
remove_proc_entry("core", llc_proc_dir);
remove_proc_entry("llc", init_net.proc_net);
}
|
