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/net_namespace.h>
  15 #include <net/sock.h>
  16 #include <linux/atalk.h>
  17
  18
  19 static __inline__ struct atalk_iface *atalk_get_interface_idx(loff_t pos)
  20 {
  21         struct atalk_iface *i;
  22
  23         for (i = atalk_interfaces; pos && i; i = i->next)
  24                 --pos;
  25
  26         return i;
  27 }
  28
  29 static void *atalk_seq_interface_start(struct seq_file *seq, loff_t *pos)
  30 {
  31         loff_t l = *pos;
  32
  33         read_lock_bh(&atalk_interfaces_lock);
  34         return l ? atalk_get_interface_idx(--l) : SEQ_START_TOKEN;
  35 }
  36
  37 static void *atalk_seq_interface_next(struct seq_file *seq, void *v, loff_t *pos)
  38 {
  39         struct atalk_iface *i;
  40
  41         ++*pos;
  42         if (v == SEQ_START_TOKEN) {
  43                 i = NULL;
  44                 if (atalk_interfaces)
  45                         i = atalk_interfaces;
  46                 goto out;
  47         }
  48         i = v;
  49         i = i->next;
  50 out:
  51         return i;
  52 }
  53
  54 static void atalk_seq_interface_stop(struct seq_file *seq, void *v)
  55 {
  56         read_unlock_bh(&atalk_interfaces_lock);
  57 }
  58
  59 static int atalk_seq_interface_show(struct seq_file *seq, void *v)
  60 {
  61         struct atalk_iface *iface;
  62
  63         if (v == SEQ_START_TOKEN) {
  64                 seq_puts(seq, "Interface        Address   Networks  "
  65                               "Status\n");
  66                 goto out;
  67         }
  68
  69         iface = v;
  70         seq_printf(seq, "%-16s %04X:%02X  %04X-%04X  %d\n",
  71                    iface->dev->name, ntohs(iface->address.s_net),
  72                    iface->address.s_node, ntohs(iface->nets.nr_firstnet),
  73                    ntohs(iface->nets.nr_lastnet), iface->status);
  74 out:
  75         return 0;
  76 }
  77
  78 static __inline__ struct atalk_route *atalk_get_route_idx(loff_t pos)
  79 {
  80         struct atalk_route *r;
  81
  82         for (r = atalk_routes; pos && r; r = r->next)
  83                 --pos;
  84
  85         return r;
  86 }
  87
  88 static void *atalk_seq_route_start(struct seq_file *seq, loff_t *pos)
  89 {
  90         loff_t l = *pos;
  91
  92         read_lock_bh(&atalk_routes_lock);
  93         return l ? atalk_get_route_idx(--l) : SEQ_START_TOKEN;
  94 }
  95
  96 static void *atalk_seq_route_next(struct seq_file *seq, void *v, loff_t *pos)
  97 {
  98         struct atalk_route *r;
  99
 100         ++*pos;
 101         if (v == SEQ_START_TOKEN) {
 102                 r = NULL;
 103                 if (atalk_routes)
 104                         r = atalk_routes;
 105                 goto out;
 106         }
 107         r = v;
 108         r = r->next;
 109 out:
 110         return r;
 111 }
 112
 113 static void atalk_seq_route_stop(struct seq_file *seq, void *v)
 114 {
 115         read_unlock_bh(&atalk_routes_lock);
 116 }
 117
 118 static int atalk_seq_route_show(struct seq_file *seq, void *v)
 119 {
 120         struct atalk_route *rt;
 121
 122         if (v == SEQ_START_TOKEN) {
 123                 seq_puts(seq, "Target        Router  Flags Dev\n");
 124                 goto out;
 125         }
 126
 127         if (atrtr_default.dev) {
 128                 rt = &atrtr_default;
 129                 seq_printf(seq, "Default     %04X:%02X  %-4d  %s\n",
 130                                ntohs(rt->gateway.s_net), rt->gateway.s_node,
 131                                rt->flags, rt->dev->name);
 132         }
 133
 134         rt = v;
 135         seq_printf(seq, "%04X:%02X     %04X:%02X  %-4d  %s\n",
 136                    ntohs(rt->target.s_net), rt->target.s_node,
 137                    ntohs(rt->gateway.s_net), rt->gateway.s_node,
 138                    rt->flags, rt->dev->name);
 139 out:
 140         return 0;
 141 }
 142
 143 static __inline__ struct sock *atalk_get_socket_idx(loff_t pos)
 144 {
 145         struct sock *s;
 146         struct hlist_node *node;
 147
 148         sk_for_each(s, node, &atalk_sockets)
 149                 if (!pos--)
 150                         goto found;
 151         s = NULL;
 152 found:
 153         return s;
 154 }
 155
 156 static void *atalk_seq_socket_start(struct seq_file *seq, loff_t *pos)
 157 {
 158         loff_t l = *pos;
 159
 160         read_lock_bh(&atalk_sockets_lock);
 161         return l ? atalk_get_socket_idx(--l) : SEQ_START_TOKEN;
 162 }
 163
 164 static void *atalk_seq_socket_next(struct seq_file *seq, void *v, loff_t *pos)
 165 {
 166         struct sock *i;
 167
 168         ++*pos;
 169         if (v == SEQ_START_TOKEN) {
 170                 i = sk_head(&atalk_sockets);
 171                 goto out;
 172         }
 173         i = sk_next(v);
 174 out:
 175         return i;
 176 }
 177
 178 static void atalk_seq_socket_stop(struct seq_file *seq, void *v)
 179 {
 180         read_unlock_bh(&atalk_sockets_lock);
 181 }
 182
 183 static int atalk_seq_socket_show(struct seq_file *seq, void *v)
 184 {
 185         struct sock *s;
 186         struct atalk_sock *at;
 187
 188         if (v == SEQ_START_TOKEN) {
 189                 seq_printf(seq, "Type Local_addr  Remote_addr Tx_queue "
 190                                 "Rx_queue St UID\n");
 191                 goto out;
 192         }
 193
 194         s = v;
 195         at = at_sk(s);
 196
 197         seq_printf(seq, "%02X   %04X:%02X:%02X  %04X:%02X:%02X  %08X:%08X "
 198                         "%02X %d\n",
 199                    s->sk_type, ntohs(at->src_net), at->src_node, at->src_port,
 200                    ntohs(at->dest_net), at->dest_node, at->dest_port,
 201                    atomic_read(&s->sk_wmem_alloc),
 202                    atomic_read(&s->sk_rmem_alloc),
 203                    s->sk_state, SOCK_INODE(s->sk_socket)->i_uid);
 204 out:
 205         return 0;
 206 }
 207
 208 static const struct seq_operations atalk_seq_interface_ops = {
 209         .start  = atalk_seq_interface_start,
 210         .next   = atalk_seq_interface_next,
 211         .stop   = atalk_seq_interface_stop,
 212         .show   = atalk_seq_interface_show,
 213 };
 214
 215 static const struct seq_operations atalk_seq_route_ops = {
 216         .start  = atalk_seq_route_start,
 217         .next   = atalk_seq_route_next,
 218         .stop   = atalk_seq_route_stop,
 219         .show   = atalk_seq_route_show,
 220 };
 221
 222 static const struct seq_operations atalk_seq_socket_ops = {
 223         .start  = atalk_seq_socket_start,
 224         .next   = atalk_seq_socket_next,
 225         .stop   = atalk_seq_socket_stop,
 226         .show   = atalk_seq_socket_show,
 227 };
 228
 229 static int atalk_seq_interface_open(struct inode *inode, struct file *file)
 230 {
 231         return seq_open(file, &atalk_seq_interface_ops);
 232 }
 233
 234 static int atalk_seq_route_open(struct inode *inode, struct file *file)
 235 {
 236         return seq_open(file, &atalk_seq_route_ops);
 237 }
 238
 239 static int atalk_seq_socket_open(struct inode *inode, struct file *file)
 240 {
 241         return seq_open(file, &atalk_seq_socket_ops);
 242 }
 243
 244 static const struct file_operations atalk_seq_interface_fops = {
 245         .owner          = THIS_MODULE,
 246         .open           = atalk_seq_interface_open,
 247         .read           = seq_read,
 248         .llseek         = seq_lseek,
 249         .release        = seq_release,
 250 };
 251
 252 static const struct file_operations atalk_seq_route_fops = {
 253         .owner          = THIS_MODULE,
 254         .open           = atalk_seq_route_open,
 255         .read           = seq_read,
 256         .llseek         = seq_lseek,
 257         .release        = seq_release,
 258 };
 259
 260 static const struct file_operations atalk_seq_socket_fops = {
 261         .owner          = THIS_MODULE,
 262         .open           = atalk_seq_socket_open,
 263         .read           = seq_read,
 264         .llseek         = seq_lseek,
 265         .release        = seq_release,
 266 };
 267
 268 static struct proc_dir_entry *atalk_proc_dir;
 269
 270 int __init atalk_proc_init(void)
 271 {
 272         struct proc_dir_entry *p;
 273         int rc = -ENOMEM;
 274
 275         atalk_proc_dir = proc_mkdir("atalk", init_net.proc_net);
 276         if (!atalk_proc_dir)
 277                 goto out;
 278         atalk_proc_dir->owner = THIS_MODULE;
 279
 280         p = create_proc_entry("interface", S_IRUGO, atalk_proc_dir);
 281         if (!p)
 282                 goto out_interface;
 283         p->proc_fops = &atalk_seq_interface_fops;
 284
 285         p = create_proc_entry("route", S_IRUGO, atalk_proc_dir);
 286         if (!p)
 287                 goto out_route;
 288         p->proc_fops = &atalk_seq_route_fops;
 289
 290         p = create_proc_entry("socket", S_IRUGO, atalk_proc_dir);
 291         if (!p)
 292                 goto out_socket;
 293         p->proc_fops = &atalk_seq_socket_fops;
 294
 295         p = create_proc_entry("arp", S_IRUGO, atalk_proc_dir);
 296         if (!p)
 297                 goto out_arp;
 298         p->proc_fops = &atalk_seq_arp_fops;
 299
 300         rc = 0;
 301 out:
 302         return rc;
 303 out_arp:
 304         remove_proc_entry("socket", atalk_proc_dir);
 305 out_socket:
 306         remove_proc_entry("route", atalk_proc_dir);
 307 out_route:
 308         remove_proc_entry("interface", atalk_proc_dir);
 309 out_interface:
 310         remove_proc_entry("atalk", init_net.proc_net);
 311         goto out;
 312 }
 313
 314 void __exit atalk_proc_exit(void)
 315 {
 316         remove_proc_entry("interface", atalk_proc_dir);
 317         remove_proc_entry("route", atalk_proc_dir);
 318         remove_proc_entry("socket", atalk_proc_dir);
 319         remove_proc_entry("arp", atalk_proc_dir);
 320         remove_proc_entry("atalk", init_net.proc_net);
 321 }