x25_proc.c 4.8 KB

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  1. // SPDX-License-Identifier: GPL-2.0-or-later
  2. /*
  3. * X.25 Packet Layer release 002
  4. *
  5. * This is ALPHA test software. This code may break your machine,
  6. * randomly fail to work with new releases, misbehave and/or generally
  7. * screw up. It might even work.
  8. *
  9. * This code REQUIRES 2.4 with seq_file support
  10. *
  11. * History
  12. * 2002/10/06 Arnaldo Carvalho de Melo seq_file support
  13. */
  14. #include <linux/init.h>
  15. #include <linux/proc_fs.h>
  16. #include <linux/seq_file.h>
  17. #include <linux/export.h>
  18. #include <net/net_namespace.h>
  19. #include <net/sock.h>
  20. #include <net/x25.h>
  21. #ifdef CONFIG_PROC_FS
  22. static void *x25_seq_route_start(struct seq_file *seq, loff_t *pos)
  23. __acquires(x25_route_list_lock)
  24. {
  25. read_lock_bh(&x25_route_list_lock);
  26. return seq_list_start_head(&x25_route_list, *pos);
  27. }
  28. static void *x25_seq_route_next(struct seq_file *seq, void *v, loff_t *pos)
  29. {
  30. return seq_list_next(v, &x25_route_list, pos);
  31. }
  32. static void x25_seq_route_stop(struct seq_file *seq, void *v)
  33. __releases(x25_route_list_lock)
  34. {
  35. read_unlock_bh(&x25_route_list_lock);
  36. }
  37. static int x25_seq_route_show(struct seq_file *seq, void *v)
  38. {
  39. struct x25_route *rt = list_entry(v, struct x25_route, node);
  40. if (v == &x25_route_list) {
  41. seq_puts(seq, "Address Digits Device\n");
  42. goto out;
  43. }
  44. rt = v;
  45. seq_printf(seq, "%-15s %-6d %-5s\n",
  46. rt->address.x25_addr, rt->sigdigits,
  47. rt->dev ? rt->dev->name : "???");
  48. out:
  49. return 0;
  50. }
  51. static void *x25_seq_socket_start(struct seq_file *seq, loff_t *pos)
  52. __acquires(x25_list_lock)
  53. {
  54. read_lock_bh(&x25_list_lock);
  55. return seq_hlist_start_head(&x25_list, *pos);
  56. }
  57. static void *x25_seq_socket_next(struct seq_file *seq, void *v, loff_t *pos)
  58. {
  59. return seq_hlist_next(v, &x25_list, pos);
  60. }
  61. static void x25_seq_socket_stop(struct seq_file *seq, void *v)
  62. __releases(x25_list_lock)
  63. {
  64. read_unlock_bh(&x25_list_lock);
  65. }
  66. static int x25_seq_socket_show(struct seq_file *seq, void *v)
  67. {
  68. struct sock *s;
  69. struct x25_sock *x25;
  70. struct net_device *dev;
  71. const char *devname;
  72. if (v == SEQ_START_TOKEN) {
  73. seq_printf(seq, "dest_addr src_addr dev lci st vs vr "
  74. "va t t2 t21 t22 t23 Snd-Q Rcv-Q inode\n");
  75. goto out;
  76. }
  77. s = sk_entry(v);
  78. x25 = x25_sk(s);
  79. if (!x25->neighbour || (dev = x25->neighbour->dev) == NULL)
  80. devname = "???";
  81. else
  82. devname = x25->neighbour->dev->name;
  83. seq_printf(seq, "%-10s %-10s %-5s %3.3X %d %d %d %d %3lu %3lu "
  84. "%3lu %3lu %3lu %5d %5d %ld\n",
  85. !x25->dest_addr.x25_addr[0] ? "*" : x25->dest_addr.x25_addr,
  86. !x25->source_addr.x25_addr[0] ? "*" : x25->source_addr.x25_addr,
  87. devname, x25->lci & 0x0FFF, x25->state, x25->vs, x25->vr,
  88. x25->va, x25_display_timer(s) / HZ, x25->t2 / HZ,
  89. x25->t21 / HZ, x25->t22 / HZ, x25->t23 / HZ,
  90. sk_wmem_alloc_get(s),
  91. sk_rmem_alloc_get(s),
  92. s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L);
  93. out:
  94. return 0;
  95. }
  96. static void *x25_seq_forward_start(struct seq_file *seq, loff_t *pos)
  97. __acquires(x25_forward_list_lock)
  98. {
  99. read_lock_bh(&x25_forward_list_lock);
  100. return seq_list_start_head(&x25_forward_list, *pos);
  101. }
  102. static void *x25_seq_forward_next(struct seq_file *seq, void *v, loff_t *pos)
  103. {
  104. return seq_list_next(v, &x25_forward_list, pos);
  105. }
  106. static void x25_seq_forward_stop(struct seq_file *seq, void *v)
  107. __releases(x25_forward_list_lock)
  108. {
  109. read_unlock_bh(&x25_forward_list_lock);
  110. }
  111. static int x25_seq_forward_show(struct seq_file *seq, void *v)
  112. {
  113. struct x25_forward *f = list_entry(v, struct x25_forward, node);
  114. if (v == &x25_forward_list) {
  115. seq_printf(seq, "lci dev1 dev2\n");
  116. goto out;
  117. }
  118. f = v;
  119. seq_printf(seq, "%d %-10s %-10s\n",
  120. f->lci, f->dev1->name, f->dev2->name);
  121. out:
  122. return 0;
  123. }
  124. static const struct seq_operations x25_seq_route_ops = {
  125. .start = x25_seq_route_start,
  126. .next = x25_seq_route_next,
  127. .stop = x25_seq_route_stop,
  128. .show = x25_seq_route_show,
  129. };
  130. static const struct seq_operations x25_seq_socket_ops = {
  131. .start = x25_seq_socket_start,
  132. .next = x25_seq_socket_next,
  133. .stop = x25_seq_socket_stop,
  134. .show = x25_seq_socket_show,
  135. };
  136. static const struct seq_operations x25_seq_forward_ops = {
  137. .start = x25_seq_forward_start,
  138. .next = x25_seq_forward_next,
  139. .stop = x25_seq_forward_stop,
  140. .show = x25_seq_forward_show,
  141. };
  142. int __init x25_proc_init(void)
  143. {
  144. if (!proc_mkdir("x25", init_net.proc_net))
  145. return -ENOMEM;
  146. if (!proc_create_seq("x25/route", 0444, init_net.proc_net,
  147. &x25_seq_route_ops))
  148. goto out;
  149. if (!proc_create_seq("x25/socket", 0444, init_net.proc_net,
  150. &x25_seq_socket_ops))
  151. goto out;
  152. if (!proc_create_seq("x25/forward", 0444, init_net.proc_net,
  153. &x25_seq_forward_ops))
  154. goto out;
  155. return 0;
  156. out:
  157. remove_proc_subtree("x25", init_net.proc_net);
  158. return -ENOMEM;
  159. }
  160. void __exit x25_proc_exit(void)
  161. {
  162. remove_proc_subtree("x25", init_net.proc_net);
  163. }
  164. #else /* CONFIG_PROC_FS */
  165. int __init x25_proc_init(void)
  166. {
  167. return 0;
  168. }
  169. void __exit x25_proc_exit(void)
  170. {
  171. }
  172. #endif /* CONFIG_PROC_FS */