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 struct seq_operations x25_seq_route_ops = { 169 .start = x25_seq_route_start, 170 .next = x25_seq_route_next, 171 .stop = x25_seq_route_stop, 172 .show = x25_seq_route_show, 173 }; 174 175 static struct seq_operations x25_seq_socket_ops = { 176 .start = x25_seq_socket_start, 177 .next = x25_seq_socket_next, 178 .stop = x25_seq_socket_stop, 179 .show = x25_seq_socket_show, 180 }; 181 182 static int x25_seq_socket_open(struct inode *inode, struct file *file) 183 { 184 return seq_open(file, &x25_seq_socket_ops); 185 } 186 187 static int x25_seq_route_open(struct inode *inode, struct file *file) 188 { 189 return seq_open(file, &x25_seq_route_ops); 190 } 191 192 static struct file_operations x25_seq_socket_fops = { 193 .owner = THIS_MODULE, 194 .open = x25_seq_socket_open, 195 .read = seq_read, 196 .llseek = seq_lseek, 197 .release = seq_release, 198 }; 199 200 static struct file_operations x25_seq_route_fops = { 201 .owner = THIS_MODULE, 202 .open = x25_seq_route_open, 203 .read = seq_read, 204 .llseek = seq_lseek, 205 .release = seq_release, 206 }; 207 208 static struct proc_dir_entry *x25_proc_dir; 209 210 int __init x25_proc_init(void) 211 { 212 struct proc_dir_entry *p; 213 int rc = -ENOMEM; 214 215 x25_proc_dir = proc_mkdir("x25", proc_net); 216 if (!x25_proc_dir) 217 goto out; 218 219 p = create_proc_entry("route", S_IRUGO, x25_proc_dir); 220 if (!p) 221 goto out_route; 222 p->proc_fops = &x25_seq_route_fops; 223 224 p = create_proc_entry("socket", S_IRUGO, x25_proc_dir); 225 if (!p) 226 goto out_socket; 227 p->proc_fops = &x25_seq_socket_fops; 228 rc = 0; 229 out: 230 return rc; 231 out_socket: 232 remove_proc_entry("route", x25_proc_dir); 233 out_route: 234 remove_proc_entry("x25", proc_net); 235 goto out; 236 } 237 238 void __exit x25_proc_exit(void) 239 { 240 remove_proc_entry("route", x25_proc_dir); 241 remove_proc_entry("socket", x25_proc_dir); 242 remove_proc_entry("x25", proc_net); 243 } 244 245 #else /* CONFIG_PROC_FS */ 246 247 int __init x25_proc_init(void) 248 { 249 return 0; 250 } 251 252 void __exit x25_proc_exit(void) 253 { 254 } 255 #endif /* CONFIG_PROC_FS */ 256