llc_proc.c revision 36cbd3dcc10384f813ec0814255f576c84f2bcd4
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 seq_printf(seq, "%pM", addr); 31} 32 33static struct sock *llc_get_sk_idx(loff_t pos) 34{ 35 struct list_head *sap_entry; 36 struct llc_sap *sap; 37 struct hlist_node *node; 38 struct sock *sk = NULL; 39 40 list_for_each(sap_entry, &llc_sap_list) { 41 sap = list_entry(sap_entry, struct llc_sap, node); 42 43 read_lock_bh(&sap->sk_list.lock); 44 sk_for_each(sk, node, &sap->sk_list.list) { 45 if (!pos) 46 goto found; 47 --pos; 48 } 49 read_unlock_bh(&sap->sk_list.lock); 50 } 51 sk = NULL; 52found: 53 return sk; 54} 55 56static void *llc_seq_start(struct seq_file *seq, loff_t *pos) 57{ 58 loff_t l = *pos; 59 60 read_lock_bh(&llc_sap_list_lock); 61 return l ? llc_get_sk_idx(--l) : SEQ_START_TOKEN; 62} 63 64static void *llc_seq_next(struct seq_file *seq, void *v, loff_t *pos) 65{ 66 struct sock* sk, *next; 67 struct llc_sock *llc; 68 struct llc_sap *sap; 69 70 ++*pos; 71 if (v == SEQ_START_TOKEN) { 72 sk = llc_get_sk_idx(0); 73 goto out; 74 } 75 sk = v; 76 next = sk_next(sk); 77 if (next) { 78 sk = next; 79 goto out; 80 } 81 llc = llc_sk(sk); 82 sap = llc->sap; 83 read_unlock_bh(&sap->sk_list.lock); 84 sk = NULL; 85 for (;;) { 86 if (sap->node.next == &llc_sap_list) 87 break; 88 sap = list_entry(sap->node.next, struct llc_sap, node); 89 read_lock_bh(&sap->sk_list.lock); 90 if (!hlist_empty(&sap->sk_list.list)) { 91 sk = sk_head(&sap->sk_list.list); 92 break; 93 } 94 read_unlock_bh(&sap->sk_list.lock); 95 } 96out: 97 return sk; 98} 99 100static void llc_seq_stop(struct seq_file *seq, void *v) 101{ 102 if (v && v != SEQ_START_TOKEN) { 103 struct sock *sk = v; 104 struct llc_sock *llc = llc_sk(sk); 105 struct llc_sap *sap = llc->sap; 106 107 read_unlock_bh(&sap->sk_list.lock); 108 } 109 read_unlock_bh(&llc_sap_list_lock); 110} 111 112static int llc_seq_socket_show(struct seq_file *seq, void *v) 113{ 114 struct sock* sk; 115 struct llc_sock *llc; 116 117 if (v == SEQ_START_TOKEN) { 118 seq_puts(seq, "SKt Mc local_mac_sap remote_mac_sap " 119 " tx_queue rx_queue st uid link\n"); 120 goto out; 121 } 122 sk = v; 123 llc = llc_sk(sk); 124 125 /* FIXME: check if the address is multicast */ 126 seq_printf(seq, "%2X %2X ", sk->sk_type, 0); 127 128 if (llc->dev) 129 llc_ui_format_mac(seq, llc->dev->dev_addr); 130 else { 131 u8 addr[6] = {0,0,0,0,0,0}; 132 llc_ui_format_mac(seq, addr); 133 } 134 seq_printf(seq, "@%02X ", llc->sap->laddr.lsap); 135 llc_ui_format_mac(seq, llc->daddr.mac); 136 seq_printf(seq, "@%02X %8d %8d %2d %3d %4d\n", llc->daddr.lsap, 137 sk_wmem_alloc_get(sk), 138 sk_rmem_alloc_get(sk) - llc->copied_seq, 139 sk->sk_state, 140 sk->sk_socket ? SOCK_INODE(sk->sk_socket)->i_uid : -1, 141 llc->link); 142out: 143 return 0; 144} 145 146static const char *const llc_conn_state_names[] = { 147 [LLC_CONN_STATE_ADM] = "adm", 148 [LLC_CONN_STATE_SETUP] = "setup", 149 [LLC_CONN_STATE_NORMAL] = "normal", 150 [LLC_CONN_STATE_BUSY] = "busy", 151 [LLC_CONN_STATE_REJ] = "rej", 152 [LLC_CONN_STATE_AWAIT] = "await", 153 [LLC_CONN_STATE_AWAIT_BUSY] = "await_busy", 154 [LLC_CONN_STATE_AWAIT_REJ] = "await_rej", 155 [LLC_CONN_STATE_D_CONN] = "d_conn", 156 [LLC_CONN_STATE_RESET] = "reset", 157 [LLC_CONN_STATE_ERROR] = "error", 158 [LLC_CONN_STATE_TEMP] = "temp", 159}; 160 161static int llc_seq_core_show(struct seq_file *seq, void *v) 162{ 163 struct sock* sk; 164 struct llc_sock *llc; 165 166 if (v == SEQ_START_TOKEN) { 167 seq_puts(seq, "Connection list:\n" 168 "dsap state retr txw rxw pf ff sf df rs cs " 169 "tack tpfc trs tbs blog busr\n"); 170 goto out; 171 } 172 sk = v; 173 llc = llc_sk(sk); 174 175 seq_printf(seq, " %02X %-10s %3d %3d %3d %2d %2d %2d %2d %2d %2d " 176 "%4d %4d %3d %3d %4d %4d\n", 177 llc->daddr.lsap, llc_conn_state_names[llc->state], 178 llc->retry_count, llc->k, llc->rw, llc->p_flag, llc->f_flag, 179 llc->s_flag, llc->data_flag, llc->remote_busy_flag, 180 llc->cause_flag, timer_pending(&llc->ack_timer.timer), 181 timer_pending(&llc->pf_cycle_timer.timer), 182 timer_pending(&llc->rej_sent_timer.timer), 183 timer_pending(&llc->busy_state_timer.timer), 184 !!sk->sk_backlog.tail, !!sock_owned_by_user(sk)); 185out: 186 return 0; 187} 188 189static const struct seq_operations llc_seq_socket_ops = { 190 .start = llc_seq_start, 191 .next = llc_seq_next, 192 .stop = llc_seq_stop, 193 .show = llc_seq_socket_show, 194}; 195 196static const struct seq_operations llc_seq_core_ops = { 197 .start = llc_seq_start, 198 .next = llc_seq_next, 199 .stop = llc_seq_stop, 200 .show = llc_seq_core_show, 201}; 202 203static int llc_seq_socket_open(struct inode *inode, struct file *file) 204{ 205 return seq_open(file, &llc_seq_socket_ops); 206} 207 208static int llc_seq_core_open(struct inode *inode, struct file *file) 209{ 210 return seq_open(file, &llc_seq_core_ops); 211} 212 213static const struct file_operations llc_seq_socket_fops = { 214 .owner = THIS_MODULE, 215 .open = llc_seq_socket_open, 216 .read = seq_read, 217 .llseek = seq_lseek, 218 .release = seq_release, 219}; 220 221static const struct file_operations llc_seq_core_fops = { 222 .owner = THIS_MODULE, 223 .open = llc_seq_core_open, 224 .read = seq_read, 225 .llseek = seq_lseek, 226 .release = seq_release, 227}; 228 229static struct proc_dir_entry *llc_proc_dir; 230 231int __init llc_proc_init(void) 232{ 233 int rc = -ENOMEM; 234 struct proc_dir_entry *p; 235 236 llc_proc_dir = proc_mkdir("llc", init_net.proc_net); 237 if (!llc_proc_dir) 238 goto out; 239 240 p = proc_create("socket", S_IRUGO, llc_proc_dir, &llc_seq_socket_fops); 241 if (!p) 242 goto out_socket; 243 244 p = proc_create("core", S_IRUGO, llc_proc_dir, &llc_seq_core_fops); 245 if (!p) 246 goto out_core; 247 248 rc = 0; 249out: 250 return rc; 251out_core: 252 remove_proc_entry("socket", llc_proc_dir); 253out_socket: 254 remove_proc_entry("llc", init_net.proc_net); 255 goto out; 256} 257 258void llc_proc_exit(void) 259{ 260 remove_proc_entry("socket", llc_proc_dir); 261 remove_proc_entry("core", llc_proc_dir); 262 remove_proc_entry("llc", init_net.proc_net); 263} 264