net/ipx/ipx_proc.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  *      IPX proc routines
   4  *
   5  *      Copyright(C) Arnaldo Carvalho de Melo <acme@conectiva.com.br>, 2002
   6  */
   7
   8 #include <linux/init.h>
   9 #ifdef CONFIG_PROC_FS
  10 #include <linux/proc_fs.h>
  11 #include <linux/spinlock.h>
  12 #include <linux/seq_file.h>
  13 #include <linux/export.h>
  14 #include <net/net_namespace.h>
  15 #include <net/tcp_states.h>
  16 #include <net/ipx.h>
  17
  18 static void *ipx_seq_interface_start(struct seq_file *seq, loff_t *pos)
  19 {
  20         spin_lock_bh(&ipx_interfaces_lock);
  21         return seq_list_start_head(&ipx_interfaces, *pos);
  22 }
  23
  24 static void *ipx_seq_interface_next(struct seq_file *seq, void *v, loff_t *pos)
  25 {
  26         return seq_list_next(v, &ipx_interfaces, pos);
  27 }
  28
  29 static void ipx_seq_interface_stop(struct seq_file *seq, void *v)
  30 {
  31         spin_unlock_bh(&ipx_interfaces_lock);
  32 }
  33
  34 static int ipx_seq_interface_show(struct seq_file *seq, void *v)
  35 {
  36         struct ipx_interface *i;
  37
  38         if (v == &ipx_interfaces) {
  39                 seq_puts(seq, "Network    Node_Address   Primary  Device     "
  40                               "Frame_Type");
  41 #ifdef IPX_REFCNT_DEBUG
  42                 seq_puts(seq, "  refcnt");
  43 #endif
  44                 seq_puts(seq, "\n");
  45                 goto out;
  46         }
  47
  48         i = list_entry(v, struct ipx_interface, node);
  49         seq_printf(seq, "%08X   ", ntohl(i->if_netnum));
  50         seq_printf(seq, "%02X%02X%02X%02X%02X%02X   ",
  51                         i->if_node[0], i->if_node[1], i->if_node[2],
  52                         i->if_node[3], i->if_node[4], i->if_node[5]);
  53         seq_printf(seq, "%-9s", i == ipx_primary_net ? "Yes" : "No");
  54         seq_printf(seq, "%-11s", ipx_device_name(i));
  55         seq_printf(seq, "%-9s", ipx_frame_name(i->if_dlink_type));
  56 #ifdef IPX_REFCNT_DEBUG
  57         seq_printf(seq, "%6d", refcount_read(&i->refcnt));
  58 #endif
  59         seq_puts(seq, "\n");
  60 out:
  61         return 0;
  62 }
  63
  64 static void *ipx_seq_route_start(struct seq_file *seq, loff_t *pos)
  65 {
  66         read_lock_bh(&ipx_routes_lock);
  67         return seq_list_start_head(&ipx_routes, *pos);
  68 }
  69
  70 static void *ipx_seq_route_next(struct seq_file *seq, void *v, loff_t *pos)
  71 {
  72         return seq_list_next(v, &ipx_routes, pos);
  73 }
  74
  75 static void ipx_seq_route_stop(struct seq_file *seq, void *v)
  76 {
  77         read_unlock_bh(&ipx_routes_lock);
  78 }
  79
  80 static int ipx_seq_route_show(struct seq_file *seq, void *v)
  81 {
  82         struct ipx_route *rt;
  83
  84         if (v == &ipx_routes) {
  85                 seq_puts(seq, "Network    Router_Net   Router_Node\n");
  86                 goto out;
  87         }
  88
  89         rt = list_entry(v, struct ipx_route, node);
  90
  91         seq_printf(seq, "%08X   ", ntohl(rt->ir_net));
  92         if (rt->ir_routed)
  93                 seq_printf(seq, "%08X     %02X%02X%02X%02X%02X%02X\n",
  94                            ntohl(rt->ir_intrfc->if_netnum),
  95                            rt->ir_router_node[0], rt->ir_router_node[1],
  96                            rt->ir_router_node[2], rt->ir_router_node[3],
  97                            rt->ir_router_node[4], rt->ir_router_node[5]);
  98         else
  99                 seq_puts(seq, "Directly     Connected\n");
 100 out:
 101         return 0;
 102 }
 103
 104 static __inline__ struct sock *ipx_get_socket_idx(loff_t pos)
 105 {
 106         struct sock *s = NULL;
 107         struct ipx_interface *i;
 108
 109         list_for_each_entry(i, &ipx_interfaces, node) {
 110                 spin_lock_bh(&i->if_sklist_lock);
 111                 sk_for_each(s, &i->if_sklist) {
 112                         if (!pos)
 113                                 break;
 114                         --pos;
 115                 }
 116                 spin_unlock_bh(&i->if_sklist_lock);
 117                 if (!pos) {
 118                         if (s)
 119                                 goto found;
 120                         break;
 121                 }
 122         }
 123         s = NULL;
 124 found:
 125         return s;
 126 }
 127
 128 static void *ipx_seq_socket_start(struct seq_file *seq, loff_t *pos)
 129 {
 130         loff_t l = *pos;
 131
 132         spin_lock_bh(&ipx_interfaces_lock);
 133         return l ? ipx_get_socket_idx(--l) : SEQ_START_TOKEN;
 134 }
 135
 136 static void *ipx_seq_socket_next(struct seq_file *seq, void *v, loff_t *pos)
 137 {
 138         struct sock* sk, *next;
 139         struct ipx_interface *i;
 140         struct ipx_sock *ipxs;
 141
 142         ++*pos;
 143         if (v == SEQ_START_TOKEN) {
 144                 sk = NULL;
 145                 i = ipx_interfaces_head();
 146                 if (!i)
 147                         goto out;
 148                 sk = sk_head(&i->if_sklist);
 149                 if (sk)
 150                         spin_lock_bh(&i->if_sklist_lock);
 151                 goto out;
 152         }
 153         sk = v;
 154         next = sk_next(sk);
 155         if (next) {
 156                 sk = next;
 157                 goto out;
 158         }
 159         ipxs = ipx_sk(sk);
 160         i = ipxs->intrfc;
 161         spin_unlock_bh(&i->if_sklist_lock);
 162         sk = NULL;
 163         for (;;) {
 164                 if (i->node.next == &ipx_interfaces)
 165                         break;
 166                 i = list_entry(i->node.next, struct ipx_interface, node);
 167                 spin_lock_bh(&i->if_sklist_lock);
 168                 if (!hlist_empty(&i->if_sklist)) {
 169                         sk = sk_head(&i->if_sklist);
 170                         break;
 171                 }
 172                 spin_unlock_bh(&i->if_sklist_lock);
 173         }
 174 out:
 175         return sk;
 176 }
 177
 178 static int ipx_seq_socket_show(struct seq_file *seq, void *v)
 179 {
 180         struct sock *s;
 181         struct ipx_sock *ipxs;
 182
 183         if (v == SEQ_START_TOKEN) {
 184 #ifdef CONFIG_IPX_INTERN
 185                 seq_puts(seq, "Local_Address               "
 186                               "Remote_Address              Tx_Queue  "
 187                               "Rx_Queue  State  Uid\n");
 188 #else
 189                 seq_puts(seq, "Local_Address  Remote_Address              "
 190                               "Tx_Queue  Rx_Queue  State  Uid\n");
 191 #endif
 192                 goto out;
 193         }
 194
 195         s = v;
 196         ipxs = ipx_sk(s);
 197 #ifdef CONFIG_IPX_INTERN
 198         seq_printf(seq, "%08X:%02X%02X%02X%02X%02X%02X:%04X  ",
 199                    ntohl(ipxs->intrfc->if_netnum),
 200                    ipxs->node[0], ipxs->node[1], ipxs->node[2], ipxs->node[3],
 201                    ipxs->node[4], ipxs->node[5], ntohs(ipxs->port));
 202 #else
 203         seq_printf(seq, "%08X:%04X  ", ntohl(ipxs->intrfc->if_netnum),
 204                    ntohs(ipxs->port));
 205 #endif  /* CONFIG_IPX_INTERN */
 206         if (s->sk_state != TCP_ESTABLISHED)
 207                 seq_printf(seq, "%-28s", "Not_Connected");
 208         else {
 209                 seq_printf(seq, "%08X:%02X%02X%02X%02X%02X%02X:%04X  ",
 210                            ntohl(ipxs->dest_addr.net),
 211                            ipxs->dest_addr.node[0], ipxs->dest_addr.node[1],
 212                            ipxs->dest_addr.node[2], ipxs->dest_addr.node[3],
 213                            ipxs->dest_addr.node[4], ipxs->dest_addr.node[5],
 214                            ntohs(ipxs->dest_addr.sock));
 215         }
 216
 217         seq_printf(seq, "%08X  %08X  %02X     %03u\n",
 218                    sk_wmem_alloc_get(s),
 219                    sk_rmem_alloc_get(s),
 220                    s->sk_state,
 221                    from_kuid_munged(seq_user_ns(seq), sock_i_uid(s)));
 222 out:
 223         return 0;
 224 }
 225
 226 static const struct seq_operations ipx_seq_interface_ops = {
 227         .start  = ipx_seq_interface_start,
 228         .next   = ipx_seq_interface_next,
 229         .stop   = ipx_seq_interface_stop,
 230         .show   = ipx_seq_interface_show,
 231 };
 232
 233 static const struct seq_operations ipx_seq_route_ops = {
 234         .start  = ipx_seq_route_start,
 235         .next   = ipx_seq_route_next,
 236         .stop   = ipx_seq_route_stop,
 237         .show   = ipx_seq_route_show,
 238 };
 239
 240 static const struct seq_operations ipx_seq_socket_ops = {
 241         .start  = ipx_seq_socket_start,
 242         .next   = ipx_seq_socket_next,
 243         .stop   = ipx_seq_interface_stop,
 244         .show   = ipx_seq_socket_show,
 245 };
 246
 247 static int ipx_seq_route_open(struct inode *inode, struct file *file)
 248 {
 249         return seq_open(file, &ipx_seq_route_ops);
 250 }
 251
 252 static int ipx_seq_interface_open(struct inode *inode, struct file *file)
 253 {
 254         return seq_open(file, &ipx_seq_interface_ops);
 255 }
 256
 257 static int ipx_seq_socket_open(struct inode *inode, struct file *file)
 258 {
 259         return seq_open(file, &ipx_seq_socket_ops);
 260 }
 261
 262 static const struct file_operations ipx_seq_interface_fops = {
 263         .owner          = THIS_MODULE,
 264         .open           = ipx_seq_interface_open,
 265         .read           = seq_read,
 266         .llseek         = seq_lseek,
 267         .release        = seq_release,
 268 };
 269
 270 static const struct file_operations ipx_seq_route_fops = {
 271         .owner          = THIS_MODULE,
 272         .open           = ipx_seq_route_open,
 273         .read           = seq_read,
 274         .llseek         = seq_lseek,
 275         .release        = seq_release,
 276 };
 277
 278 static const struct file_operations ipx_seq_socket_fops = {
 279         .owner          = THIS_MODULE,
 280         .open           = ipx_seq_socket_open,
 281         .read           = seq_read,
 282         .llseek         = seq_lseek,
 283         .release        = seq_release,
 284 };
 285
 286 static struct proc_dir_entry *ipx_proc_dir;
 287
 288 int __init ipx_proc_init(void)
 289 {
 290         struct proc_dir_entry *p;
 291         int rc = -ENOMEM;
 292
 293         ipx_proc_dir = proc_mkdir("ipx", init_net.proc_net);
 294
 295         if (!ipx_proc_dir)
 296                 goto out;
 297         p = proc_create("interface", S_IRUGO,
 298                         ipx_proc_dir, &ipx_seq_interface_fops);
 299         if (!p)
 300                 goto out_interface;
 301
 302         p = proc_create("route", S_IRUGO, ipx_proc_dir, &ipx_seq_route_fops);
 303         if (!p)
 304                 goto out_route;
 305
 306         p = proc_create("socket", S_IRUGO, ipx_proc_dir, &ipx_seq_socket_fops);
 307         if (!p)
 308                 goto out_socket;
 309
 310         rc = 0;
 311 out:
 312         return rc;
 313 out_socket:
 314         remove_proc_entry("route", ipx_proc_dir);
 315 out_route:
 316         remove_proc_entry("interface", ipx_proc_dir);
 317 out_interface:
 318         remove_proc_entry("ipx", init_net.proc_net);
 319         goto out;
 320 }
 321
 322 void __exit ipx_proc_exit(void)
 323 {
 324         remove_proc_entry("interface", ipx_proc_dir);
 325         remove_proc_entry("route", ipx_proc_dir);
 326         remove_proc_entry("socket", ipx_proc_dir);
 327         remove_proc_entry("ipx", init_net.proc_net);
 328 }
 329
 330 #else /* CONFIG_PROC_FS */
 331
 332 int __init ipx_proc_init(void)
 333 {
 334         return 0;
 335 }
 336
 337 void __exit ipx_proc_exit(void)
 338 {
 339 }
 340
 341 #endif /* CONFIG_PROC_FS */