linux/net/appletalk/atalk_proc.c
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   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
  20static __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
  30static 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
  39static 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;
  52out:
  53        return i;
  54}
  55
  56static 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
  62static 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);
  77out:
  78        return 0;
  79}
  80
  81static __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
  91static 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
 100static 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;
 113out:
 114        return r;
 115}
 116
 117static 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
 123static 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);
 144out:
 145        return 0;
 146}
 147
 148static 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
 155static 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
 160static 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
 166static 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, SOCK_INODE(s->sk_socket)->i_uid);
 187out:
 188        return 0;
 189}
 190
 191static const struct seq_operations atalk_seq_interface_ops = {
 192        .start  = atalk_seq_interface_start,
 193        .next   = atalk_seq_interface_next,
 194        .stop   = atalk_seq_interface_stop,
 195        .show   = atalk_seq_interface_show,
 196};
 197
 198static const struct seq_operations atalk_seq_route_ops = {
 199        .start  = atalk_seq_route_start,
 200        .next   = atalk_seq_route_next,
 201        .stop   = atalk_seq_route_stop,
 202        .show   = atalk_seq_route_show,
 203};
 204
 205static const struct seq_operations atalk_seq_socket_ops = {
 206        .start  = atalk_seq_socket_start,
 207        .next   = atalk_seq_socket_next,
 208        .stop   = atalk_seq_socket_stop,
 209        .show   = atalk_seq_socket_show,
 210};
 211
 212static int atalk_seq_interface_open(struct inode *inode, struct file *file)
 213{
 214        return seq_open(file, &atalk_seq_interface_ops);
 215}
 216
 217static int atalk_seq_route_open(struct inode *inode, struct file *file)
 218{
 219        return seq_open(file, &atalk_seq_route_ops);
 220}
 221
 222static int atalk_seq_socket_open(struct inode *inode, struct file *file)
 223{
 224        return seq_open(file, &atalk_seq_socket_ops);
 225}
 226
 227static const struct file_operations atalk_seq_interface_fops = {
 228        .owner          = THIS_MODULE,
 229        .open           = atalk_seq_interface_open,
 230        .read           = seq_read,
 231        .llseek         = seq_lseek,
 232        .release        = seq_release,
 233};
 234
 235static const struct file_operations atalk_seq_route_fops = {
 236        .owner          = THIS_MODULE,
 237        .open           = atalk_seq_route_open,
 238        .read           = seq_read,
 239        .llseek         = seq_lseek,
 240        .release        = seq_release,
 241};
 242
 243static const struct file_operations atalk_seq_socket_fops = {
 244        .owner          = THIS_MODULE,
 245        .open           = atalk_seq_socket_open,
 246        .read           = seq_read,
 247        .llseek         = seq_lseek,
 248        .release        = seq_release,
 249};
 250
 251static struct proc_dir_entry *atalk_proc_dir;
 252
 253int __init atalk_proc_init(void)
 254{
 255        struct proc_dir_entry *p;
 256        int rc = -ENOMEM;
 257
 258        atalk_proc_dir = proc_mkdir("atalk", init_net.proc_net);
 259        if (!atalk_proc_dir)
 260                goto out;
 261
 262        p = proc_create("interface", S_IRUGO, atalk_proc_dir,
 263                        &atalk_seq_interface_fops);
 264        if (!p)
 265                goto out_interface;
 266
 267        p = proc_create("route", S_IRUGO, atalk_proc_dir,
 268                        &atalk_seq_route_fops);
 269        if (!p)
 270                goto out_route;
 271
 272        p = proc_create("socket", S_IRUGO, atalk_proc_dir,
 273                        &atalk_seq_socket_fops);
 274        if (!p)
 275                goto out_socket;
 276
 277        p = proc_create("arp", S_IRUGO, atalk_proc_dir, &atalk_seq_arp_fops);
 278        if (!p)
 279                goto out_arp;
 280
 281        rc = 0;
 282out:
 283        return rc;
 284out_arp:
 285        remove_proc_entry("socket", atalk_proc_dir);
 286out_socket:
 287        remove_proc_entry("route", atalk_proc_dir);
 288out_route:
 289        remove_proc_entry("interface", atalk_proc_dir);
 290out_interface:
 291        remove_proc_entry("atalk", init_net.proc_net);
 292        goto out;
 293}
 294
 295void __exit atalk_proc_exit(void)
 296{
 297        remove_proc_entry("interface", atalk_proc_dir);
 298        remove_proc_entry("route", atalk_proc_dir);
 299        remove_proc_entry("socket", atalk_proc_dir);
 300        remove_proc_entry("arp", atalk_proc_dir);
 301        remove_proc_entry("atalk", init_net.proc_net);
 302}
 303
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