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/init.h> 21 #include <linux/proc_fs.h> 22 #include <linux/seq_file.h> 23 #include <net/sock.h> 24 #include <net/x25.h> 25 26 #ifdef CONFIG_PROC_FS 27 static __inline__ struct x25_route *x25_get_route_idx(loff_t pos) 28 { 29 struct list_head *route_entry; 30 struct x25_route *rt = NULL; 31 32 list_for_each(route_entry, &x25_route_list) { 33 rt = list_entry(route_entry, struct x25_route, node); 34 if (!pos--) 35 goto found; 36 } 37 rt = NULL; 38 found: 39 return rt; 40 } 41 42 static void *x25_seq_route_start(struct seq_file *seq, loff_t *pos) 43 { 44 loff_t l = *pos; 45 46 read_lock_bh(&x25_route_list_lock); 47 return l ? x25_get_route_idx(--l) : SEQ_START_TOKEN; 48 } 49 50 static void *x25_seq_route_next(struct seq_file *seq, void *v, loff_t *pos) 51 { 52 struct x25_route *rt; 53 54 ++*pos; 55 if (v == SEQ_START_TOKEN) { 56 rt = NULL; 57 if (!list_empty(&x25_route_list)) 58 rt = list_entry(x25_route_list.next, 59 struct x25_route, node); 60 goto out; 61 } 62 rt = v; 63 if (rt->node.next != &x25_route_list) 64 rt = list_entry(rt->node.next, struct x25_route, node); 65 else 66 rt = NULL; 67 out: 68 return rt; 69 } 70 71 static void x25_seq_route_stop(struct seq_file *seq, void *v) 72 { 73 read_unlock_bh(&x25_route_list_lock); 74 } 75 76 static int x25_seq_route_show(struct seq_file *seq, void *v) 77 { 78 struct x25_route *rt; 79 80 if (v == SEQ_START_TOKEN) { 81 seq_puts(seq, "Address Digits Device\n"); 82 goto out; 83 } 84 85 rt = v; 86 seq_printf(seq, "%-15s %-6d %-5s\n", 87 rt->address.x25_addr, rt->sigdigits, 88 rt->dev ? rt->dev->name : "???"); 89 out: 90 return 0; 91 } 92 93 static __inline__ struct sock *x25_get_socket_idx(loff_t pos) 94 { 95 struct sock *s; 96 struct hlist_node *node; 97 98 sk_for_each(s, node, &x25_list) 99 if (!pos--) 100 goto found; 101 s = NULL; 102 found: 103 return s; 104 } 105 106 static void *x25_seq_socket_start(struct seq_file *seq, loff_t *pos) 107 { 108 loff_t l = *pos; 109 110 read_lock_bh(&x25_list_lock); 111 return l ? x25_get_socket_idx(--l) : SEQ_START_TOKEN; 112 } 113 114 static void *x25_seq_socket_next(struct seq_file *seq, void *v, loff_t *pos) 115 { 116 struct sock *s; 117 118 ++*pos; 119 if (v == SEQ_START_TOKEN) { 120 s = sk_head(&x25_list); 121 goto out; 122 } 123 s = sk_next(v); 124 out: 125 return s; 126 } 127 128 static void x25_seq_socket_stop(struct seq_file *seq, void *v) 129 { 130 read_unlock_bh(&x25_list_lock); 131 } 132 133 static int x25_seq_socket_show(struct seq_file *seq, void *v) 134 { 135 struct sock *s; 136 struct x25_sock *x25; 137 struct net_device *dev; 138 const char *devname; 139 140 if (v == SEQ_START_TOKEN) { 141 seq_printf(seq, "dest_addr src_addr dev lci st vs vr " 142 "va t t2 t21 t22 t23 Snd-Q Rcv-Q inode\n"); 143 goto out; 144 } 145 146 s = v; 147 x25 = x25_sk(s); 148 149 if (!x25->neighbour || (dev = x25->neighbour->dev) == NULL) 150 devname = "???"; 151 else 152 devname = x25->neighbour->dev->name; 153 154 seq_printf(seq, "%-10s %-10s %-5s %3.3X %d %d %d %d %3lu %3lu " 155 "%3lu %3lu %3lu %5d %5d %ld\n", 156 !x25->dest_addr.x25_addr[0] ? "*" : x25->dest_addr.x25_addr, 157 !x25->source_addr.x25_addr[0] ? "*" : x25->source_addr.x25_addr, 158 devname, x25->lci & 0x0FFF, x25->state, x25->vs, x25->vr, 159 x25->va, x25_display_timer(s) / HZ, x25->t2 / HZ, 160 x25->t21 / HZ, x25->t22 / HZ, x25->t23 / HZ, 161 atomic_read(&s->sk_wmem_alloc), 162 atomic_read(&s->sk_rmem_alloc), 163 s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L); 164 out: 165 return 0; 166 } 167 168 static __inline__ struct x25_forward *x25_get_forward_idx(loff_t pos) 169 { 170 struct x25_forward *f; 171 struct list_head *entry; 172 173 list_for_each(entry, &x25_forward_list) { 174 f = list_entry(entry, struct x25_forward, node); 175 if (!pos--) 176 goto found; 177 } 178 179 f = NULL; 180 found: 181 return f; 182 } 183 184 static void *x25_seq_forward_start(struct seq_file *seq, loff_t *pos) 185 { 186 loff_t l = *pos; 187 188 read_lock_bh(&x25_forward_list_lock); 189 return l ? x25_get_forward_idx(--l) : SEQ_START_TOKEN; 190 } 191 192 static void *x25_seq_forward_next(struct seq_file *seq, void *v, loff_t *pos) 193 { 194 struct x25_forward *f; 195 196 ++*pos; 197 if (v == SEQ_START_TOKEN) { 198 f = NULL; 199 if (!list_empty(&x25_forward_list)) 200 f = list_entry(x25_forward_list.next, 201 struct x25_forward, node); 202 goto out; 203 } 204 f = v; 205 if (f->node.next != &x25_forward_list) 206 f = list_entry(f->node.next, struct x25_forward, node); 207 else 208 f = NULL; 209 out: 210 return f; 211 212 } 213 214 static void x25_seq_forward_stop(struct seq_file *seq, void *v) 215 { 216 read_unlock_bh(&x25_forward_list_lock); 217 } 218 219 static int x25_seq_forward_show(struct seq_file *seq, void *v) 220 { 221 struct x25_forward *f; 222 223 if (v == SEQ_START_TOKEN) { 224 seq_printf(seq, "lci dev1 dev2\n"); 225 goto out; 226 } 227 228 f = v; 229 230 seq_printf(seq, "%d %-10s %-10s\n", 231 f->lci, f->dev1->name, f->dev2->name); 232 233 out: 234 return 0; 235 } 236 237 static const struct seq_operations x25_seq_route_ops = { 238 .start = x25_seq_route_start, 239 .next = x25_seq_route_next, 240 .stop = x25_seq_route_stop, 241 .show = x25_seq_route_show, 242 }; 243 244 static const struct seq_operations x25_seq_socket_ops = { 245 .start = x25_seq_socket_start, 246 .next = x25_seq_socket_next, 247 .stop = x25_seq_socket_stop, 248 .show = x25_seq_socket_show, 249 }; 250 251 static const struct seq_operations x25_seq_forward_ops = { 252 .start = x25_seq_forward_start, 253 .next = x25_seq_forward_next, 254 .stop = x25_seq_forward_stop, 255 .show = x25_seq_forward_show, 256 }; 257 258 static int x25_seq_socket_open(struct inode *inode, struct file *file) 259 { 260 return seq_open(file, &x25_seq_socket_ops); 261 } 262 263 static int x25_seq_route_open(struct inode *inode, struct file *file) 264 { 265 return seq_open(file, &x25_seq_route_ops); 266 } 267 268 static int x25_seq_forward_open(struct inode *inode, struct file *file) 269 { 270 return seq_open(file, &x25_seq_forward_ops); 271 } 272 273 static const struct file_operations x25_seq_socket_fops = { 274 .owner = THIS_MODULE, 275 .open = x25_seq_socket_open, 276 .read = seq_read, 277 .llseek = seq_lseek, 278 .release = seq_release, 279 }; 280 281 static const struct file_operations x25_seq_route_fops = { 282 .owner = THIS_MODULE, 283 .open = x25_seq_route_open, 284 .read = seq_read, 285 .llseek = seq_lseek, 286 .release = seq_release, 287 }; 288 289 static struct file_operations x25_seq_forward_fops = { 290 .owner = THIS_MODULE, 291 .open = x25_seq_forward_open, 292 .read = seq_read, 293 .llseek = seq_lseek, 294 .release = seq_release, 295 }; 296 297 static struct proc_dir_entry *x25_proc_dir; 298 299 int __init x25_proc_init(void) 300 { 301 struct proc_dir_entry *p; 302 int rc = -ENOMEM; 303 304 x25_proc_dir = proc_mkdir("x25", proc_net); 305 if (!x25_proc_dir) 306 goto out; 307 308 p = create_proc_entry("route", S_IRUGO, x25_proc_dir); 309 if (!p) 310 goto out_route; 311 p->proc_fops = &x25_seq_route_fops; 312 313 p = create_proc_entry("socket", S_IRUGO, x25_proc_dir); 314 if (!p) 315 goto out_socket; 316 p->proc_fops = &x25_seq_socket_fops; 317 318 p = create_proc_entry("forward", S_IRUGO, x25_proc_dir); 319 if (!p) 320 goto out_forward; 321 p->proc_fops = &x25_seq_forward_fops; 322 rc = 0; 323 324 out: 325 return rc; 326 out_forward: 327 remove_proc_entry("socket", x25_proc_dir); 328 out_socket: 329 remove_proc_entry("route", x25_proc_dir); 330 out_route: 331 remove_proc_entry("x25", proc_net); 332 goto out; 333 } 334 335 void __exit x25_proc_exit(void) 336 { 337 remove_proc_entry("forward", x25_proc_dir); 338 remove_proc_entry("route", x25_proc_dir); 339 remove_proc_entry("socket", x25_proc_dir); 340 remove_proc_entry("x25", proc_net); 341 } 342 343 #else /* CONFIG_PROC_FS */ 344 345 int __init x25_proc_init(void) 346 { 347 return 0; 348 } 349 350 void __exit x25_proc_exit(void) 351 { 352 } 353 #endif /* CONFIG_PROC_FS */ 354