net/appletalk/atalk_proc.c

   1 /*
   2  *      atalk_proc.c - proc support for Appletalk
   3  *
   4  *      Copyright(c) Arnaldo Carvalho de Melo <acme@conectiva.com.br>
   5  *
   6  *      This program is free software; you can redistribute it and/or modify it
   7  *      under the terms of the GNU General Public License as published by the
   8  *      Free Software Foundation, version 2.
   9  */
  10
  11 #include <linux/init.h>
  12 #include <linux/proc_fs.h>
  13 #include <linux/seq_file.h>
  14 #include <net/sock.h>
  15 #include <linux/atalk.h>
  16
  17
  18 static __inline__ struct atalk_iface *atalk_get_interface_idx(loff_t pos)
  19 {
  20         struct atalk_iface *i;
  21
  22         for (i = atalk_interfaces; pos && i; i = i->next)
  23                 --pos;
  24
  25         return i;
  26 }
  27
  28 static void *atalk_seq_interface_start(struct seq_file *seq, loff_t *pos)
  29 {
  30         loff_t l = *pos;
  31
  32         read_lock_bh(&atalk_interfaces_lock);
  33         return l ? atalk_get_interface_idx(--l) : SEQ_START_TOKEN;
  34 }
  35
  36 static void *atalk_seq_interface_next(struct seq_file *seq, void *v, loff_t *pos)
  37 {
  38         struct atalk_iface *i;
  39
  40         ++*pos;
  41         if (v == SEQ_START_TOKEN) {
  42                 i = NULL;
  43                 if (atalk_interfaces)
  44                         i = atalk_interfaces;
  45                 goto out;
  46         }
  47         i = v;
  48         i = i->next;
  49 out:
  50         return i;
  51 }
  52
  53 static void atalk_seq_interface_stop(struct seq_file *seq, void *v)
  54 {
  55         read_unlock_bh(&atalk_interfaces_lock);
  56 }
  57
  58 static int atalk_seq_interface_show(struct seq_file *seq, void *v)
  59 {
  60         struct atalk_iface *iface;
  61
  62         if (v == SEQ_START_TOKEN) {
  63                 seq_puts(seq, "Interface        Address   Networks  "
  64                               "Status\n");
  65                 goto out;
  66         }
  67
  68         iface = v;
  69         seq_printf(seq, "%-16s %04X:%02X  %04X-%04X  %d\n",
  70                    iface->dev->name, ntohs(iface->address.s_net),
  71                    iface->address.s_node, ntohs(iface->nets.nr_firstnet),
  72                    ntohs(iface->nets.nr_lastnet), iface->status);
  73 out:
  74         return 0;
  75 }
  76
  77 static __inline__ struct atalk_route *atalk_get_route_idx(loff_t pos)
  78 {
  79         struct atalk_route *r;
  80
  81         for (r = atalk_routes; pos && r; r = r->next)
  82                 --pos;
  83
  84         return r;
  85 }
  86
  87 static void *atalk_seq_route_start(struct seq_file *seq, loff_t *pos)
  88 {
  89         loff_t l = *pos;
  90
  91         read_lock_bh(&atalk_routes_lock);
  92         return l ? atalk_get_route_idx(--l) : SEQ_START_TOKEN;
  93 }
  94
  95 static void *atalk_seq_route_next(struct seq_file *seq, void *v, loff_t *pos)
  96 {
  97         struct atalk_route *r;
  98
  99         ++*pos;
 100         if (v == SEQ_START_TOKEN) {
 101                 r = NULL;
 102                 if (atalk_routes)
 103                         r = atalk_routes;
 104                 goto out;
 105         }
 106         r = v;
 107         r = r->next;
 108 out:
 109         return r;
 110 }
 111
 112 static void atalk_seq_route_stop(struct seq_file *seq, void *v)
 113 {
 114         read_unlock_bh(&atalk_routes_lock);
 115 }
 116
 117 static int atalk_seq_route_show(struct seq_file *seq, void *v)
 118 {
 119         struct atalk_route *rt;
 120
 121         if (v == SEQ_START_TOKEN) {
 122                 seq_puts(seq, "Target        Router  Flags Dev\n");
 123                 goto out;
 124         }
 125
 126         if (atrtr_default.dev) {
 127                 rt = &atrtr_default;
 128                 seq_printf(seq, "Default     %04X:%02X  %-4d  %s\n",
 129                                ntohs(rt->gateway.s_net), rt->gateway.s_node,
 130                                rt->flags, rt->dev->name);
 131         }
 132
 133         rt = v;
 134         seq_printf(seq, "%04X:%02X     %04X:%02X  %-4d  %s\n",
 135                    ntohs(rt->target.s_net), rt->target.s_node,
 136                    ntohs(rt->gateway.s_net), rt->gateway.s_node,
 137                    rt->flags, rt->dev->name);
 138 out:
 139         return 0;
 140 }
 141
 142 static __inline__ struct sock *atalk_get_socket_idx(loff_t pos)
 143 {
 144         struct sock *s;
 145         struct hlist_node *node;
 146
 147         sk_for_each(s, node, &atalk_sockets)
 148                 if (!pos--)
 149                         goto found;
 150         s = NULL;
 151 found:
 152         return s;
 153 }
 154
 155 static void *atalk_seq_socket_start(struct seq_file *seq, loff_t *pos)
 156 {
 157         loff_t l = *pos;
 158
 159         read_lock_bh(&atalk_sockets_lock);
 160         return l ? atalk_get_socket_idx(--l) : SEQ_START_TOKEN;
 161 }
 162
 163 static void *atalk_seq_socket_next(struct seq_file *seq, void *v, loff_t *pos)
 164 {
 165         struct sock *i;
 166
 167         ++*pos;
 168         if (v == SEQ_START_TOKEN) {
 169                 i = sk_head(&atalk_sockets);
 170                 goto out;
 171         }
 172         i = sk_next(v);
 173 out:
 174         return i;
 175 }
 176
 177 static void atalk_seq_socket_stop(struct seq_file *seq, void *v)
 178 {
 179         read_unlock_bh(&atalk_sockets_lock);
 180 }
 181
 182 static int atalk_seq_socket_show(struct seq_file *seq, void *v)
 183 {
 184         struct sock *s;
 185         struct atalk_sock *at;
 186
 187         if (v == SEQ_START_TOKEN) {
 188                 seq_printf(seq, "Type Local_addr  Remote_addr Tx_queue "
 189                                 "Rx_queue St UID\n");
 190                 goto out;
 191         }
 192
 193         s = v;
 194         at = at_sk(s);
 195
 196         seq_printf(seq, "%02X   %04X:%02X:%02X  %04X:%02X:%02X  %08X:%08X "
 197                         "%02X %d\n",
 198                    s->sk_type, ntohs(at->src_net), at->src_node, at->src_port,
 199                    ntohs(at->dest_net), at->dest_node, at->dest_port,
 200                    atomic_read(&s->sk_wmem_alloc),
 201                    atomic_read(&s->sk_rmem_alloc),
 202                    s->sk_state, SOCK_INODE(s->sk_socket)->i_uid);
 203 out:
 204         return 0;
 205 }
 206
 207 static struct seq_operations atalk_seq_interface_ops = {
 208         .start  = atalk_seq_interface_start,
 209         .next   = atalk_seq_interface_next,
 210         .stop   = atalk_seq_interface_stop,
 211         .show   = atalk_seq_interface_show,
 212 };
 213
 214 static struct seq_operations atalk_seq_route_ops = {
 215         .start  = atalk_seq_route_start,
 216         .next   = atalk_seq_route_next,
 217         .stop   = atalk_seq_route_stop,
 218         .show   = atalk_seq_route_show,
 219 };
 220
 221 static struct seq_operations atalk_seq_socket_ops = {
 222         .start  = atalk_seq_socket_start,
 223         .next   = atalk_seq_socket_next,
 224         .stop   = atalk_seq_socket_stop,
 225         .show   = atalk_seq_socket_show,
 226 };
 227
 228 static int atalk_seq_interface_open(struct inode *inode, struct file *file)
 229 {
 230         return seq_open(file, &atalk_seq_interface_ops);
 231 }
 232
 233 static int atalk_seq_route_open(struct inode *inode, struct file *file)
 234 {
 235         return seq_open(file, &atalk_seq_route_ops);
 236 }
 237
 238 static int atalk_seq_socket_open(struct inode *inode, struct file *file)
 239 {
 240         return seq_open(file, &atalk_seq_socket_ops);
 241 }
 242
 243 static struct file_operations atalk_seq_interface_fops = {
 244         .owner          = THIS_MODULE,
 245         .open           = atalk_seq_interface_open,
 246         .read           = seq_read,
 247         .llseek         = seq_lseek,
 248         .release        = seq_release,
 249 };
 250
 251 static struct file_operations atalk_seq_route_fops = {
 252         .owner          = THIS_MODULE,
 253         .open           = atalk_seq_route_open,
 254         .read           = seq_read,
 255         .llseek         = seq_lseek,
 256         .release        = seq_release,
 257 };
 258
 259 static struct file_operations atalk_seq_socket_fops = {
 260         .owner          = THIS_MODULE,
 261         .open           = atalk_seq_socket_open,
 262         .read           = seq_read,
 263         .llseek         = seq_lseek,
 264         .release        = seq_release,
 265 };
 266
 267 static struct proc_dir_entry *atalk_proc_dir;
 268
 269 int __init atalk_proc_init(void)
 270 {
 271         struct proc_dir_entry *p;
 272         int rc = -ENOMEM;
 273
 274         atalk_proc_dir = proc_mkdir("atalk", proc_net);
 275         if (!atalk_proc_dir)
 276                 goto out;
 277         atalk_proc_dir->owner = THIS_MODULE;
 278
 279         p = create_proc_entry("interface", S_IRUGO, atalk_proc_dir);
 280         if (!p)
 281                 goto out_interface;
 282         p->proc_fops = &atalk_seq_interface_fops;
 283
 284         p = create_proc_entry("route", S_IRUGO, atalk_proc_dir);
 285         if (!p)
 286                 goto out_route;
 287         p->proc_fops = &atalk_seq_route_fops;
 288
 289         p = create_proc_entry("socket", S_IRUGO, atalk_proc_dir);
 290         if (!p)
 291                 goto out_socket;
 292         p->proc_fops = &atalk_seq_socket_fops;
 293
 294         p = create_proc_entry("arp", S_IRUGO, atalk_proc_dir);
 295         if (!p)
 296                 goto out_arp;
 297         p->proc_fops = &atalk_seq_arp_fops;
 298
 299         rc = 0;
 300 out:
 301         return rc;
 302 out_arp:
 303         remove_proc_entry("socket", atalk_proc_dir);
 304 out_socket:
 305         remove_proc_entry("route", atalk_proc_dir);
 306 out_route:
 307         remove_proc_entry("interface", atalk_proc_dir);
 308 out_interface:
 309         remove_proc_entry("atalk", proc_net);
 310         goto out;
 311 }
 312
 313 void __exit atalk_proc_exit(void)
 314 {
 315         remove_proc_entry("interface", atalk_proc_dir);
 316         remove_proc_entry("route", atalk_proc_dir);
 317         remove_proc_entry("socket", atalk_proc_dir);
 318         remove_proc_entry("arp", atalk_proc_dir);
 319         remove_proc_entry("atalk", proc_net);
 320 }