bond_procfs.c 7.6 KB

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  1. #include <linux/proc_fs.h>
  2. #include <linux/export.h>
  3. #include <net/net_namespace.h>
  4. #include <net/netns/generic.h>
  5. #include "bonding.h"
  6. static void *bond_info_seq_start(struct seq_file *seq, loff_t *pos)
  7. __acquires(RCU)
  8. __acquires(&bond->lock)
  9. {
  10. struct bonding *bond = seq->private;
  11. struct list_head *iter;
  12. struct slave *slave;
  13. loff_t off = 0;
  14. /* make sure the bond won't be taken away */
  15. rcu_read_lock();
  16. read_lock(&bond->lock);
  17. if (*pos == 0)
  18. return SEQ_START_TOKEN;
  19. bond_for_each_slave(bond, slave, iter)
  20. if (++off == *pos)
  21. return slave;
  22. return NULL;
  23. }
  24. static void *bond_info_seq_next(struct seq_file *seq, void *v, loff_t *pos)
  25. {
  26. struct bonding *bond = seq->private;
  27. struct list_head *iter;
  28. struct slave *slave;
  29. bool found = false;
  30. ++*pos;
  31. if (v == SEQ_START_TOKEN)
  32. return bond_first_slave(bond);
  33. if (bond_is_last_slave(bond, v))
  34. return NULL;
  35. bond_for_each_slave(bond, slave, iter) {
  36. if (found)
  37. return slave;
  38. if (slave == v)
  39. found = true;
  40. }
  41. return NULL;
  42. }
  43. static void bond_info_seq_stop(struct seq_file *seq, void *v)
  44. __releases(&bond->lock)
  45. __releases(RCU)
  46. {
  47. struct bonding *bond = seq->private;
  48. read_unlock(&bond->lock);
  49. rcu_read_unlock();
  50. }
  51. static void bond_info_show_master(struct seq_file *seq)
  52. {
  53. struct bonding *bond = seq->private;
  54. struct slave *curr;
  55. int i;
  56. read_lock(&bond->curr_slave_lock);
  57. curr = bond->curr_active_slave;
  58. read_unlock(&bond->curr_slave_lock);
  59. seq_printf(seq, "Bonding Mode: %s",
  60. bond_mode_name(bond->params.mode));
  61. if (bond->params.mode == BOND_MODE_ACTIVEBACKUP &&
  62. bond->params.fail_over_mac)
  63. seq_printf(seq, " (fail_over_mac %s)",
  64. fail_over_mac_tbl[bond->params.fail_over_mac].modename);
  65. seq_printf(seq, "\n");
  66. if (bond->params.mode == BOND_MODE_XOR ||
  67. bond->params.mode == BOND_MODE_8023AD) {
  68. seq_printf(seq, "Transmit Hash Policy: %s (%d)\n",
  69. xmit_hashtype_tbl[bond->params.xmit_policy].modename,
  70. bond->params.xmit_policy);
  71. }
  72. if (USES_PRIMARY(bond->params.mode)) {
  73. seq_printf(seq, "Primary Slave: %s",
  74. (bond->primary_slave) ?
  75. bond->primary_slave->dev->name : "None");
  76. if (bond->primary_slave)
  77. seq_printf(seq, " (primary_reselect %s)",
  78. pri_reselect_tbl[bond->params.primary_reselect].modename);
  79. seq_printf(seq, "\nCurrently Active Slave: %s\n",
  80. (curr) ? curr->dev->name : "None");
  81. }
  82. seq_printf(seq, "MII Status: %s\n", netif_carrier_ok(bond->dev) ?
  83. "up" : "down");
  84. seq_printf(seq, "MII Polling Interval (ms): %d\n", bond->params.miimon);
  85. seq_printf(seq, "Up Delay (ms): %d\n",
  86. bond->params.updelay * bond->params.miimon);
  87. seq_printf(seq, "Down Delay (ms): %d\n",
  88. bond->params.downdelay * bond->params.miimon);
  89. /* ARP information */
  90. if (bond->params.arp_interval > 0) {
  91. int printed = 0;
  92. seq_printf(seq, "ARP Polling Interval (ms): %d\n",
  93. bond->params.arp_interval);
  94. seq_printf(seq, "ARP IP target/s (n.n.n.n form):");
  95. for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
  96. if (!bond->params.arp_targets[i])
  97. break;
  98. if (printed)
  99. seq_printf(seq, ",");
  100. seq_printf(seq, " %pI4", &bond->params.arp_targets[i]);
  101. printed = 1;
  102. }
  103. seq_printf(seq, "\n");
  104. }
  105. if (bond->params.mode == BOND_MODE_8023AD) {
  106. struct ad_info ad_info;
  107. seq_puts(seq, "\n802.3ad info\n");
  108. seq_printf(seq, "LACP rate: %s\n",
  109. (bond->params.lacp_fast) ? "fast" : "slow");
  110. seq_printf(seq, "Min links: %d\n", bond->params.min_links);
  111. seq_printf(seq, "Aggregator selection policy (ad_select): %s\n",
  112. ad_select_tbl[bond->params.ad_select].modename);
  113. if (__bond_3ad_get_active_agg_info(bond, &ad_info)) {
  114. seq_printf(seq, "bond %s has no active aggregator\n",
  115. bond->dev->name);
  116. } else {
  117. seq_printf(seq, "Active Aggregator Info:\n");
  118. seq_printf(seq, "\tAggregator ID: %d\n",
  119. ad_info.aggregator_id);
  120. seq_printf(seq, "\tNumber of ports: %d\n",
  121. ad_info.ports);
  122. seq_printf(seq, "\tActor Key: %d\n",
  123. ad_info.actor_key);
  124. seq_printf(seq, "\tPartner Key: %d\n",
  125. ad_info.partner_key);
  126. seq_printf(seq, "\tPartner Mac Address: %pM\n",
  127. ad_info.partner_system);
  128. }
  129. }
  130. }
  131. static const char *bond_slave_link_status(s8 link)
  132. {
  133. static const char * const status[] = {
  134. [BOND_LINK_UP] = "up",
  135. [BOND_LINK_FAIL] = "going down",
  136. [BOND_LINK_DOWN] = "down",
  137. [BOND_LINK_BACK] = "going back",
  138. };
  139. return status[link];
  140. }
  141. static void bond_info_show_slave(struct seq_file *seq,
  142. const struct slave *slave)
  143. {
  144. struct bonding *bond = seq->private;
  145. seq_printf(seq, "\nSlave Interface: %s\n", slave->dev->name);
  146. seq_printf(seq, "MII Status: %s\n", bond_slave_link_status(slave->link));
  147. if (slave->speed == SPEED_UNKNOWN)
  148. seq_printf(seq, "Speed: %s\n", "Unknown");
  149. else
  150. seq_printf(seq, "Speed: %d Mbps\n", slave->speed);
  151. if (slave->duplex == DUPLEX_UNKNOWN)
  152. seq_printf(seq, "Duplex: %s\n", "Unknown");
  153. else
  154. seq_printf(seq, "Duplex: %s\n", slave->duplex ? "full" : "half");
  155. seq_printf(seq, "Link Failure Count: %u\n",
  156. slave->link_failure_count);
  157. seq_printf(seq, "Permanent HW addr: %pM\n", slave->perm_hwaddr);
  158. if (bond->params.mode == BOND_MODE_8023AD) {
  159. const struct aggregator *agg
  160. = SLAVE_AD_INFO(slave).port.aggregator;
  161. if (agg)
  162. seq_printf(seq, "Aggregator ID: %d\n",
  163. agg->aggregator_identifier);
  164. else
  165. seq_puts(seq, "Aggregator ID: N/A\n");
  166. }
  167. seq_printf(seq, "Slave queue ID: %d\n", slave->queue_id);
  168. }
  169. static int bond_info_seq_show(struct seq_file *seq, void *v)
  170. {
  171. if (v == SEQ_START_TOKEN) {
  172. seq_printf(seq, "%s\n", bond_version);
  173. bond_info_show_master(seq);
  174. } else
  175. bond_info_show_slave(seq, v);
  176. return 0;
  177. }
  178. static const struct seq_operations bond_info_seq_ops = {
  179. .start = bond_info_seq_start,
  180. .next = bond_info_seq_next,
  181. .stop = bond_info_seq_stop,
  182. .show = bond_info_seq_show,
  183. };
  184. static int bond_info_open(struct inode *inode, struct file *file)
  185. {
  186. struct seq_file *seq;
  187. int res;
  188. res = seq_open(file, &bond_info_seq_ops);
  189. if (!res) {
  190. /* recover the pointer buried in proc_dir_entry data */
  191. seq = file->private_data;
  192. seq->private = PDE_DATA(inode);
  193. }
  194. return res;
  195. }
  196. static const struct file_operations bond_info_fops = {
  197. .owner = THIS_MODULE,
  198. .open = bond_info_open,
  199. .read = seq_read,
  200. .llseek = seq_lseek,
  201. .release = seq_release,
  202. };
  203. void bond_create_proc_entry(struct bonding *bond)
  204. {
  205. struct net_device *bond_dev = bond->dev;
  206. struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id);
  207. if (bn->proc_dir) {
  208. bond->proc_entry = proc_create_data(bond_dev->name,
  209. S_IRUGO, bn->proc_dir,
  210. &bond_info_fops, bond);
  211. if (bond->proc_entry == NULL)
  212. pr_warning("Warning: Cannot create /proc/net/%s/%s\n",
  213. DRV_NAME, bond_dev->name);
  214. else
  215. memcpy(bond->proc_file_name, bond_dev->name, IFNAMSIZ);
  216. }
  217. }
  218. void bond_remove_proc_entry(struct bonding *bond)
  219. {
  220. struct net_device *bond_dev = bond->dev;
  221. struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id);
  222. if (bn->proc_dir && bond->proc_entry) {
  223. remove_proc_entry(bond->proc_file_name, bn->proc_dir);
  224. memset(bond->proc_file_name, 0, IFNAMSIZ);
  225. bond->proc_entry = NULL;
  226. }
  227. }
  228. /* Create the bonding directory under /proc/net, if doesn't exist yet.
  229. * Caller must hold rtnl_lock.
  230. */
  231. void __net_init bond_create_proc_dir(struct bond_net *bn)
  232. {
  233. if (!bn->proc_dir) {
  234. bn->proc_dir = proc_mkdir(DRV_NAME, bn->net->proc_net);
  235. if (!bn->proc_dir)
  236. pr_warning("Warning: cannot create /proc/net/%s\n",
  237. DRV_NAME);
  238. }
  239. }
  240. /* Destroy the bonding directory under /proc/net, if empty.
  241. * Caller must hold rtnl_lock.
  242. */
  243. void __net_exit bond_destroy_proc_dir(struct bond_net *bn)
  244. {
  245. if (bn->proc_dir) {
  246. remove_proc_entry(DRV_NAME, bn->net->proc_net);
  247. bn->proc_dir = NULL;
  248. }
  249. }