tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * proc_llc.c - proc interface for LLC
3 *
4 * Copyright (c) 2001 by Jay Schulist <jschlst@samba.org>
5 * 2002-2003 by Arnaldo Carvalho de Melo <acme@conectiva.com.br>
6 *
7 * This program can be redistributed or modified under the terms of the
8 * GNU General Public License as published by the Free Software Foundation.
9 * This program is distributed without any warranty or implied warranty
10 * of merchantability or fitness for a particular purpose.
11 *
12 * See the GNU General Public License for more details.
13 */
14
15#include <linux/init.h>
16#include <linux/kernel.h>
17#include <linux/proc_fs.h>
18#include <linux/errno.h>
19#include <linux/seq_file.h>
20#include <net/net_namespace.h>
21#include <net/sock.h>
22#include <net/llc.h>
23#include <net/llc_c_ac.h>
24#include <net/llc_c_ev.h>
25#include <net/llc_c_st.h>
26#include <net/llc_conn.h>
27
28static void llc_ui_format_mac(struct seq_file *seq, u8 *addr)
29{
30 DECLARE_MAC_BUF(mac);
31 seq_printf(seq, "%s", print_mac(mac, addr));
32}
33
34static struct sock *llc_get_sk_idx(loff_t pos)
35{
36 struct list_head *sap_entry;
37 struct llc_sap *sap;
38 struct hlist_node *node;
39 struct sock *sk = NULL;
40
41 list_for_each(sap_entry, &llc_sap_list) {
42 sap = list_entry(sap_entry, struct llc_sap, node);
43
44 read_lock_bh(&sap->sk_list.lock);
45 sk_for_each(sk, node, &sap->sk_list.list) {
46 if (!pos)
47 goto found;
48 --pos;
49 }
50 read_unlock_bh(&sap->sk_list.lock);
51 }
52 sk = NULL;
53found:
54 return sk;
55}
56
57static void *llc_seq_start(struct seq_file *seq, loff_t *pos)
58{
59 loff_t l = *pos;
60
61 read_lock_bh(&llc_sap_list_lock);
62 return l ? llc_get_sk_idx(--l) : SEQ_START_TOKEN;
63}
64
65static void *llc_seq_next(struct seq_file *seq, void *v, loff_t *pos)
66{
67 struct sock* sk, *next;
68 struct llc_sock *llc;
69 struct llc_sap *sap;
70
71 ++*pos;
72 if (v == SEQ_START_TOKEN) {
73 sk = llc_get_sk_idx(0);
74 goto out;
75 }
76 sk = v;
77 next = sk_next(sk);
78 if (next) {
79 sk = next;
80 goto out;
81 }
82 llc = llc_sk(sk);
83 sap = llc->sap;
84 read_unlock_bh(&sap->sk_list.lock);
85 sk = NULL;
86 for (;;) {
87 if (sap->node.next == &llc_sap_list)
88 break;
89 sap = list_entry(sap->node.next, struct llc_sap, node);
90 read_lock_bh(&sap->sk_list.lock);
91 if (!hlist_empty(&sap->sk_list.list)) {
92 sk = sk_head(&sap->sk_list.list);
93 break;
94 }
95 read_unlock_bh(&sap->sk_list.lock);
96 }
97out:
98 return sk;
99}
100
101static void llc_seq_stop(struct seq_file *seq, void *v)
102{
103 if (v && v != SEQ_START_TOKEN) {
104 struct sock *sk = v;
105 struct llc_sock *llc = llc_sk(sk);
106 struct llc_sap *sap = llc->sap;
107
108 read_unlock_bh(&sap->sk_list.lock);
109 }
110 read_unlock_bh(&llc_sap_list_lock);
111}
112
113static int llc_seq_socket_show(struct seq_file *seq, void *v)
114{
115 struct sock* sk;
116 struct llc_sock *llc;
117
118 if (v == SEQ_START_TOKEN) {
119 seq_puts(seq, "SKt Mc local_mac_sap remote_mac_sap "
120 " tx_queue rx_queue st uid link\n");
121 goto out;
122 }
123 sk = v;
124 llc = llc_sk(sk);
125
126 /* FIXME: check if the address is multicast */
127 seq_printf(seq, "%2X %2X ", sk->sk_type, 0);
128
129 if (llc->dev)
130 llc_ui_format_mac(seq, llc->dev->dev_addr);
131 else {
132 u8 addr[6] = {0,0,0,0,0,0};
133 llc_ui_format_mac(seq, addr);
134 }
135 seq_printf(seq, "@%02X ", llc->sap->laddr.lsap);
136 llc_ui_format_mac(seq, llc->daddr.mac);
137 seq_printf(seq, "@%02X %8d %8d %2d %3d %4d\n", llc->daddr.lsap,
138 atomic_read(&sk->sk_wmem_alloc),
139 atomic_read(&sk->sk_rmem_alloc) - llc->copied_seq,
140 sk->sk_state,
141 sk->sk_socket ? SOCK_INODE(sk->sk_socket)->i_uid : -1,
142 llc->link);
143out:
144 return 0;
145}
146
147static char *llc_conn_state_names[] = {
148 [LLC_CONN_STATE_ADM] = "adm",
149 [LLC_CONN_STATE_SETUP] = "setup",
150 [LLC_CONN_STATE_NORMAL] = "normal",
151 [LLC_CONN_STATE_BUSY] = "busy",
152 [LLC_CONN_STATE_REJ] = "rej",
153 [LLC_CONN_STATE_AWAIT] = "await",
154 [LLC_CONN_STATE_AWAIT_BUSY] = "await_busy",
155 [LLC_CONN_STATE_AWAIT_REJ] = "await_rej",
156 [LLC_CONN_STATE_D_CONN] = "d_conn",
157 [LLC_CONN_STATE_RESET] = "reset",
158 [LLC_CONN_STATE_ERROR] = "error",
159 [LLC_CONN_STATE_TEMP] = "temp",
160};
161
162static int llc_seq_core_show(struct seq_file *seq, void *v)
163{
164 struct sock* sk;
165 struct llc_sock *llc;
166
167 if (v == SEQ_START_TOKEN) {
168 seq_puts(seq, "Connection list:\n"
169 "dsap state retr txw rxw pf ff sf df rs cs "
170 "tack tpfc trs tbs blog busr\n");
171 goto out;
172 }
173 sk = v;
174 llc = llc_sk(sk);
175
176 seq_printf(seq, " %02X %-10s %3d %3d %3d %2d %2d %2d %2d %2d %2d "
177 "%4d %4d %3d %3d %4d %4d\n",
178 llc->daddr.lsap, llc_conn_state_names[llc->state],
179 llc->retry_count, llc->k, llc->rw, llc->p_flag, llc->f_flag,
180 llc->s_flag, llc->data_flag, llc->remote_busy_flag,
181 llc->cause_flag, timer_pending(&llc->ack_timer.timer),
182 timer_pending(&llc->pf_cycle_timer.timer),
183 timer_pending(&llc->rej_sent_timer.timer),
184 timer_pending(&llc->busy_state_timer.timer),
185 !!sk->sk_backlog.tail, !!sock_owned_by_user(sk));
186out:
187 return 0;
188}
189
190static const struct seq_operations llc_seq_socket_ops = {
191 .start = llc_seq_start,
192 .next = llc_seq_next,
193 .stop = llc_seq_stop,
194 .show = llc_seq_socket_show,
195};
196
197static const struct seq_operations llc_seq_core_ops = {
198 .start = llc_seq_start,
199 .next = llc_seq_next,
200 .stop = llc_seq_stop,
201 .show = llc_seq_core_show,
202};
203
204static int llc_seq_socket_open(struct inode *inode, struct file *file)
205{
206 return seq_open(file, &llc_seq_socket_ops);
207}
208
209static int llc_seq_core_open(struct inode *inode, struct file *file)
210{
211 return seq_open(file, &llc_seq_core_ops);
212}
213
214static const struct file_operations llc_seq_socket_fops = {
215 .owner = THIS_MODULE,
216 .open = llc_seq_socket_open,
217 .read = seq_read,
218 .llseek = seq_lseek,
219 .release = seq_release,
220};
221
222static const struct file_operations llc_seq_core_fops = {
223 .owner = THIS_MODULE,
224 .open = llc_seq_core_open,
225 .read = seq_read,
226 .llseek = seq_lseek,
227 .release = seq_release,
228};
229
230static struct proc_dir_entry *llc_proc_dir;
231
232int __init llc_proc_init(void)
233{
234 int rc = -ENOMEM;
235 struct proc_dir_entry *p;
236
237 llc_proc_dir = proc_mkdir("llc", init_net.proc_net);
238 if (!llc_proc_dir)
239 goto out;
240 llc_proc_dir->owner = THIS_MODULE;
241
242 p = create_proc_entry("socket", S_IRUGO, llc_proc_dir);
243 if (!p)
244 goto out_socket;
245
246 p->proc_fops = &llc_seq_socket_fops;
247
248 p = create_proc_entry("core", S_IRUGO, llc_proc_dir);
249 if (!p)
250 goto out_core;
251
252 p->proc_fops = &llc_seq_core_fops;
253
254 rc = 0;
255out:
256 return rc;
257out_core:
258 remove_proc_entry("socket", llc_proc_dir);
259out_socket:
260 remove_proc_entry("llc", init_net.proc_net);
261 goto out;
262}
263
264void llc_proc_exit(void)
265{
266 remove_proc_entry("socket", llc_proc_dir);
267 remove_proc_entry("core", llc_proc_dir);
268 remove_proc_entry("llc", init_net.proc_net);
269}