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