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/config.h>
  12 #include <linux/init.h>
  13 #include <linux/proc_fs.h>
  14 #include <linux/seq_file.h>
  15 #include <net/sock.h>
  16 #include <linux/atalk.h>
  17
  18 #ifdef CONFIG_PROC_FS
  19 extern struct file_operations atalk_seq_arp_fops;
  20
  21 static __inline__ struct atalk_iface *atalk_get_interface_idx(loff_t pos)
  22 {
  23         struct atalk_iface *i;
  24
  25         for (i = atalk_interfaces; pos && i; i = i->next)
  26                 --pos;
  27
  28         return i;
  29 }
  30
  31 static void *atalk_seq_interface_start(struct seq_file *seq, loff_t *pos)
  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 {
  58         read_unlock_bh(&atalk_interfaces_lock);
  59 }
  60
  61 static int atalk_seq_interface_show(struct seq_file *seq, void *v)
  62 {
  63         struct atalk_iface *iface;
  64
  65         if (v == SEQ_START_TOKEN) {
  66                 seq_puts(seq, "Interface        Address   Networks  "
  67                               "Status\n");
  68                 goto out;
  69         }
  70
  71         iface = v;
  72         seq_printf(seq, "%-16s %04X:%02X  %04X-%04X  %d\n",
  73                    iface->dev->name, ntohs(iface->address.s_net),
  74                    iface->address.s_node, ntohs(iface->nets.nr_firstnet),
  75                    ntohs(iface->nets.nr_lastnet), iface->status);
  76 out:
  77         return 0;
  78 }
  79
  80 static __inline__ struct atalk_route *atalk_get_route_idx(loff_t pos)
  81 {
  82         struct atalk_route *r;
  83
  84         for (r = atalk_routes; pos && r; r = r->next)
  85                 --pos;
  86
  87         return r;
  88 }
  89
  90 static void *atalk_seq_route_start(struct seq_file *seq, loff_t *pos)
  91 {
  92         loff_t l = *pos;
  93
  94         read_lock_bh(&atalk_routes_lock);
  95         return l ? atalk_get_route_idx(--l) : SEQ_START_TOKEN;
  96 }
  97
  98 static void *atalk_seq_route_next(struct seq_file *seq, void *v, loff_t *pos)
  99 {
 100         struct atalk_route *r;
 101
 102         ++*pos;
 103         if (v == SEQ_START_TOKEN) {
 104                 r = NULL;
 105                 if (atalk_routes)
 106                         r = atalk_routes;
 107                 goto out;
 108         }
 109         r = v;
 110         r = r->next;
 111 out:
 112         return r;
 113 }
 114
 115 static void atalk_seq_route_stop(struct seq_file *seq, void *v)
 116 {
 117         read_unlock_bh(&atalk_routes_lock);
 118 }
 119
 120 static int atalk_seq_route_show(struct seq_file *seq, void *v)
 121 {
 122         struct atalk_route *rt;
 123
 124         if (v == SEQ_START_TOKEN) {
 125                 seq_puts(seq, "Target        Router  Flags Dev\n");
 126                 goto out;
 127         }
 128
 129         if (atrtr_default.dev) {
 130                 rt = &atrtr_default;
 131                 seq_printf(seq, "Default     %04X:%02X  %-4d  %s\n",
 132                                ntohs(rt->gateway.s_net), rt->gateway.s_node,
 133                                rt->flags, rt->dev->name);
 134         }
 135
 136         rt = v;
 137         seq_printf(seq, "%04X:%02X     %04X:%02X  %-4d  %s\n",
 138                    ntohs(rt->target.s_net), rt->target.s_node,
 139                    ntohs(rt->gateway.s_net), rt->gateway.s_node,
 140                    rt->flags, rt->dev->name);
 141 out:
 142         return 0;
 143 }
 144
 145 static __inline__ struct sock *atalk_get_socket_idx(loff_t pos)
 146 {
 147         struct sock *s;
 148         struct hlist_node *node;
 149
 150         sk_for_each(s, node, &atalk_sockets)
 151                 if (!pos--)
 152                         goto found;
 153         s = NULL;
 154 found:
 155         return s;
 156 }
 157
 158 static void *atalk_seq_socket_start(struct seq_file *seq, loff_t *pos)
 159 {
 160         loff_t l = *pos;
 161
 162         read_lock_bh(&atalk_sockets_lock);
 163         return l ? atalk_get_socket_idx(--l) : SEQ_START_TOKEN;
 164 }
 165
 166 static void *atalk_seq_socket_next(struct seq_file *seq, void *v, loff_t *pos)
 167 {
 168         struct sock *i;
 169
 170         ++*pos;
 171         if (v == SEQ_START_TOKEN) {
 172                 i = sk_head(&atalk_sockets);
 173                 goto out;
 174         }
 175         i = sk_next(v);
 176 out:
 177         return i;
 178 }
 179
 180 static void atalk_seq_socket_stop(struct seq_file *seq, void *v)
 181 {
 182         read_unlock_bh(&atalk_sockets_lock);
 183 }
 184
 185 static int atalk_seq_socket_show(struct seq_file *seq, void *v)
 186 {
 187         struct sock *s;
 188         struct atalk_sock *at;
 189
 190         if (v == SEQ_START_TOKEN) {
 191                 seq_printf(seq, "Type Local_addr  Remote_addr Tx_queue "
 192                                 "Rx_queue St UID\n");
 193                 goto out;
 194         }
 195
 196         s = v;
 197         at = at_sk(s);
 198
 199         seq_printf(seq, "%02X   %04X:%02X:%02X  %04X:%02X:%02X  %08X:%08X "
 200                         "%02X %d\n",
 201                    s->sk_type, ntohs(at->src_net), at->src_node, at->src_port,
 202                    ntohs(at->dest_net), at->dest_node, at->dest_port,
 203                    atomic_read(&s->sk_wmem_alloc),
 204                    atomic_read(&s->sk_rmem_alloc),
 205                    s->sk_state, SOCK_INODE(s->sk_socket)->i_uid);
 206 out:
 207         return 0;
 208 }
 209
 210 struct seq_operations atalk_seq_interface_ops = {
 211         .start  = atalk_seq_interface_start,
 212         .next   = atalk_seq_interface_next,
 213         .stop   = atalk_seq_interface_stop,
 214         .show   = atalk_seq_interface_show,
 215 };
 216
 217 struct seq_operations atalk_seq_route_ops = {
 218         .start  = atalk_seq_route_start,
 219         .next   = atalk_seq_route_next,
 220         .stop   = atalk_seq_route_stop,
 221         .show   = atalk_seq_route_show,
 222 };
 223
 224 struct seq_operations atalk_seq_socket_ops = {
 225         .start  = atalk_seq_socket_start,
 226         .next   = atalk_seq_socket_next,
 227         .stop   = atalk_seq_socket_stop,
 228         .show   = atalk_seq_socket_show,
 229 };
 230
 231 static int atalk_seq_interface_open(struct inode *inode, struct file *file)
 232 {
 233         return seq_open(file, &atalk_seq_interface_ops);
 234 }
 235
 236 static int atalk_seq_route_open(struct inode *inode, struct file *file)
 237 {
 238         return seq_open(file, &atalk_seq_route_ops);
 239 }
 240
 241 static int atalk_seq_socket_open(struct inode *inode, struct file *file)
 242 {
 243         return seq_open(file, &atalk_seq_socket_ops);
 244 }
 245
 246 static struct file_operations atalk_seq_interface_fops = {
 247         .owner          = THIS_MODULE,
 248         .open           = atalk_seq_interface_open,
 249         .read           = seq_read,
 250         .llseek         = seq_lseek,
 251         .release        = seq_release,
 252 };
 253
 254 static struct file_operations atalk_seq_route_fops = {
 255         .owner          = THIS_MODULE,
 256         .open           = atalk_seq_route_open,
 257         .read           = seq_read,
 258         .llseek         = seq_lseek,
 259         .release        = seq_release,
 260 };
 261
 262 static struct file_operations atalk_seq_socket_fops = {
 263         .owner          = THIS_MODULE,
 264         .open           = atalk_seq_socket_open,
 265         .read           = seq_read,
 266         .llseek         = seq_lseek,
 267         .release        = seq_release,
 268 };
 269
 270 static struct proc_dir_entry *atalk_proc_dir;
 271
 272 int __init atalk_proc_init(void)
 273 {
 274         struct proc_dir_entry *p;
 275         int rc = -ENOMEM;
 276
 277         atalk_proc_dir = proc_mkdir("atalk", proc_net);
 278         if (!atalk_proc_dir)
 279                 goto out;
 280         atalk_proc_dir->owner = THIS_MODULE;
 281
 282         p = create_proc_entry("interface", S_IRUGO, atalk_proc_dir);
 283         if (!p)
 284                 goto out_interface;
 285         p->proc_fops = &atalk_seq_interface_fops;
 286
 287         p = create_proc_entry("route", S_IRUGO, atalk_proc_dir);
 288         if (!p)
 289                 goto out_route;
 290         p->proc_fops = &atalk_seq_route_fops;
 291
 292         p = create_proc_entry("socket", S_IRUGO, atalk_proc_dir);
 293         if (!p)
 294                 goto out_socket;
 295         p->proc_fops = &atalk_seq_socket_fops;
 296
 297         p = create_proc_entry("arp", S_IRUGO, atalk_proc_dir);
 298         if (!p)
 299                 goto out_arp;
 300         p->proc_fops = &atalk_seq_arp_fops;
 301
 302         rc = 0;
 303 out:
 304         return rc;
 305 out_arp:
 306         remove_proc_entry("socket", atalk_proc_dir);
 307 out_socket:
 308         remove_proc_entry("route", atalk_proc_dir);
 309 out_route:
 310         remove_proc_entry("interface", atalk_proc_dir);
 311 out_interface:
 312         remove_proc_entry("atalk", proc_net);
 313         goto out;
 314 }
 315
 316 void __exit atalk_proc_exit(void)
 317 {
 318         remove_proc_entry("interface", atalk_proc_dir);
 319         remove_proc_entry("route", atalk_proc_dir);
 320         remove_proc_entry("socket", atalk_proc_dir);
 321         remove_proc_entry("arp", atalk_proc_dir);
 322         remove_proc_entry("atalk", proc_net);
 323 }
 324
 325 #else /* CONFIG_PROC_FS */
 326 int __init atalk_proc_init(void)
 327 {
 328         return 0;
 329 }
 330
 331 void __exit atalk_proc_exit(void)
 332 {
 333 }
 334 #endif /* CONFIG_PROC_FS */