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 28 static 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 34 static 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; 53 found: 54 return sk; 55 } 56 57 static 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 65 static 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 } 97 out: 98 return sk; 99 } 100 101 static 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 } 112 113 static 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); 143 out: 144 return 0; 145 } 146 147 static 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 }; 161 162 static 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)); 186 out: 187 return 0; 188 } 189 190 static 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 }; 196 197 static 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 }; 203 204 static int llc_seq_socket_open(struct inode *inode, struct file *file) 205 { 206 return seq_open(file, &llc_seq_socket_ops); 207 } 208 209 static int llc_seq_core_open(struct inode *inode, struct file *file) 210 { 211 return seq_open(file, &llc_seq_core_ops); 212 } 213 214 static 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 }; 221 222 static 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 }; 229 230 static struct proc_dir_entry *llc_proc_dir; 231 232 int __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 = proc_create("socket", S_IRUGO, llc_proc_dir, &llc_seq_socket_fops); 243 if (!p) 244 goto out_socket; 245 246 p = proc_create("core", S_IRUGO, llc_proc_dir, &llc_seq_core_fops); 247 if (!p) 248 goto out_core; 249 250 rc = 0; 251 out: 252 return rc; 253 out_core: 254 remove_proc_entry("socket", llc_proc_dir); 255 out_socket: 256 remove_proc_entry("llc", init_net.proc_net); 257 goto out; 258 } 259 260 void llc_proc_exit(void) 261 { 262 remove_proc_entry("socket", llc_proc_dir); 263 remove_proc_entry("core", llc_proc_dir); 264 remove_proc_entry("llc", init_net.proc_net); 265 } 266