1 /* 2 * X.25 Packet Layer release 002 3 * 4 * This is ALPHA test software. This code may break your machine, 5 * randomly fail to work with new releases, misbehave and/or generally 6 * screw up. It might even work. 7 * 8 * This code REQUIRES 2.4 with seq_file support 9 * 10 * This module: 11 * This module is free software; you can redistribute it and/or 12 * modify it under the terms of the GNU General Public License 13 * as published by the Free Software Foundation; either version 14 * 2 of the License, or (at your option) any later version. 15 * 16 * History 17 * 2002/10/06 Arnaldo Carvalho de Melo seq_file support 18 */ 19 20 #include <linux/config.h> 21 #include <linux/init.h> 22 #include <linux/proc_fs.h> 23 #include <linux/seq_file.h> 24 #include <net/sock.h> 25 #include <net/x25.h> 26 27 #ifdef CONFIG_PROC_FS 28 static __inline__ struct x25_route *x25_get_route_idx(loff_t pos) 29 { 30 struct list_head *route_entry; 31 struct x25_route *rt = NULL; 32 33 list_for_each(route_entry, &x25_route_list) { 34 rt = list_entry(route_entry, struct x25_route, node); 35 if (!pos--) 36 goto found; 37 } 38 rt = NULL; 39 found: 40 return rt; 41 } 42 43 static void *x25_seq_route_start(struct seq_file *seq, loff_t *pos) 44 { 45 loff_t l = *pos; 46 47 read_lock_bh(&x25_route_list_lock); 48 return l ? x25_get_route_idx(--l) : SEQ_START_TOKEN; 49 } 50 51 static void *x25_seq_route_next(struct seq_file *seq, void *v, loff_t *pos) 52 { 53 struct x25_route *rt; 54 55 ++*pos; 56 if (v == SEQ_START_TOKEN) { 57 rt = NULL; 58 if (!list_empty(&x25_route_list)) 59 rt = list_entry(x25_route_list.next, 60 struct x25_route, node); 61 goto out; 62 } 63 rt = v; 64 if (rt->node.next != &x25_route_list) 65 rt = list_entry(rt->node.next, struct x25_route, node); 66 else 67 rt = NULL; 68 out: 69 return rt; 70 } 71 72 static void x25_seq_route_stop(struct seq_file *seq, void *v) 73 { 74 read_unlock_bh(&x25_route_list_lock); 75 } 76 77 static int x25_seq_route_show(struct seq_file *seq, void *v) 78 { 79 struct x25_route *rt; 80 81 if (v == SEQ_START_TOKEN) { 82 seq_puts(seq, "Address Digits Device\n"); 83 goto out; 84 } 85 86 rt = v; 87 seq_printf(seq, "%-15s %-6d %-5s\n", 88 rt->address.x25_addr, rt->sigdigits, 89 rt->dev ? rt->dev->name : "???"); 90 out: 91 return 0; 92 } 93 94 static __inline__ struct sock *x25_get_socket_idx(loff_t pos) 95 { 96 struct sock *s; 97 struct hlist_node *node; 98 99 sk_for_each(s, node, &x25_list) 100 if (!pos--) 101 goto found; 102 s = NULL; 103 found: 104 return s; 105 } 106 107 static void *x25_seq_socket_start(struct seq_file *seq, loff_t *pos) 108 { 109 loff_t l = *pos; 110 111 read_lock_bh(&x25_list_lock); 112 return l ? x25_get_socket_idx(--l) : SEQ_START_TOKEN; 113 } 114 115 static void *x25_seq_socket_next(struct seq_file *seq, void *v, loff_t *pos) 116 { 117 struct sock *s; 118 119 ++*pos; 120 if (v == SEQ_START_TOKEN) { 121 s = sk_head(&x25_list); 122 goto out; 123 } 124 s = sk_next(v); 125 out: 126 return s; 127 } 128 129 static void x25_seq_socket_stop(struct seq_file *seq, void *v) 130 { 131 read_unlock_bh(&x25_list_lock); 132 } 133 134 static int x25_seq_socket_show(struct seq_file *seq, void *v) 135 { 136 struct sock *s; 137 struct x25_sock *x25; 138 struct net_device *dev; 139 const char *devname; 140 141 if (v == SEQ_START_TOKEN) { 142 seq_printf(seq, "dest_addr src_addr dev lci st vs vr " 143 "va t t2 t21 t22 t23 Snd-Q Rcv-Q inode\n"); 144 goto out; 145 } 146 147 s = v; 148 x25 = x25_sk(s); 149 150 if (!x25->neighbour || (dev = x25->neighbour->dev) == NULL) 151 devname = "???"; 152 else 153 devname = x25->neighbour->dev->name; 154 155 seq_printf(seq, "%-10s %-10s %-5s %3.3X %d %d %d %d %3lu %3lu " 156 "%3lu %3lu %3lu %5d %5d %ld\n", 157 !x25->dest_addr.x25_addr[0] ? "*" : x25->dest_addr.x25_addr, 158 !x25->source_addr.x25_addr[0] ? "*" : x25->source_addr.x25_addr, 159 devname, x25->lci & 0x0FFF, x25->state, x25->vs, x25->vr, 160 x25->va, x25_display_timer(s) / HZ, x25->t2 / HZ, 161 x25->t21 / HZ, x25->t22 / HZ, x25->t23 / HZ, 162 atomic_read(&s->sk_wmem_alloc), 163 atomic_read(&s->sk_rmem_alloc), 164 s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L); 165 out: 166 return 0; 167 } 168 169 static struct seq_operations x25_seq_route_ops = { 170 .start = x25_seq_route_start, 171 .next = x25_seq_route_next, 172 .stop = x25_seq_route_stop, 173 .show = x25_seq_route_show, 174 }; 175 176 static struct seq_operations x25_seq_socket_ops = { 177 .start = x25_seq_socket_start, 178 .next = x25_seq_socket_next, 179 .stop = x25_seq_socket_stop, 180 .show = x25_seq_socket_show, 181 }; 182 183 static int x25_seq_socket_open(struct inode *inode, struct file *file) 184 { 185 return seq_open(file, &x25_seq_socket_ops); 186 } 187 188 static int x25_seq_route_open(struct inode *inode, struct file *file) 189 { 190 return seq_open(file, &x25_seq_route_ops); 191 } 192 193 static struct file_operations x25_seq_socket_fops = { 194 .owner = THIS_MODULE, 195 .open = x25_seq_socket_open, 196 .read = seq_read, 197 .llseek = seq_lseek, 198 .release = seq_release, 199 }; 200 201 static struct file_operations x25_seq_route_fops = { 202 .owner = THIS_MODULE, 203 .open = x25_seq_route_open, 204 .read = seq_read, 205 .llseek = seq_lseek, 206 .release = seq_release, 207 }; 208 209 static struct proc_dir_entry *x25_proc_dir; 210 211 int __init x25_proc_init(void) 212 { 213 struct proc_dir_entry *p; 214 int rc = -ENOMEM; 215 216 x25_proc_dir = proc_mkdir("x25", proc_net); 217 if (!x25_proc_dir) 218 goto out; 219 220 p = create_proc_entry("route", S_IRUGO, x25_proc_dir); 221 if (!p) 222 goto out_route; 223 p->proc_fops = &x25_seq_route_fops; 224 225 p = create_proc_entry("socket", S_IRUGO, x25_proc_dir); 226 if (!p) 227 goto out_socket; 228 p->proc_fops = &x25_seq_socket_fops; 229 rc = 0; 230 out: 231 return rc; 232 out_socket: 233 remove_proc_entry("route", x25_proc_dir); 234 out_route: 235 remove_proc_entry("x25", proc_net); 236 goto out; 237 } 238 239 void __exit x25_proc_exit(void) 240 { 241 remove_proc_entry("route", x25_proc_dir); 242 remove_proc_entry("socket", x25_proc_dir); 243 remove_proc_entry("x25", proc_net); 244 } 245 246 #else /* CONFIG_PROC_FS */ 247 248 int __init x25_proc_init(void) 249 { 250 return 0; 251 } 252 253 void __exit x25_proc_exit(void) 254 { 255 } 256 #endif /* CONFIG_PROC_FS */ 257