Quelle  bond_procfs.c   Sprache: C

// SPDX-License-Identifier: GPL-2.0
#include <linux/proc_fs.h>
#include <linux/ethtool.h>
#include <linux/export.h>
#include <net/net_namespace.h>
#include <net/netns/generic.h>
#include <net/bonding.h>

#include "bonding_priv.h"

static void *bond_info_seq_start(struct seq_file *seq, loff_t *pos)
 __acquires(RCU)
{
 struct bonding *bond = pde_data(file_inode(seq->file));
 struct list_head *iter;
 struct slave *slave;
 loff_t off = 0;

 rcu_read_lock();

 if (*pos == 0)
  return SEQ_START_TOKEN;

 bond_for_each_slave_rcu(bond, slave, iter)
  if (++off == *pos)
   return slave;

 return NULL;
}

static void *bond_info_seq_next(struct seq_file *seq, void *v, loff_t *pos)
{
 struct bonding *bond = pde_data(file_inode(seq->file));
 struct list_head *iter;
 struct slave *slave;
 bool found = false;

 ++*pos;
 if (v == SEQ_START_TOKEN)
  return bond_first_slave_rcu(bond);

 bond_for_each_slave_rcu(bond, slave, iter) {
  if (found)
   return slave;
  if (slave == v)
   found = true;
 }

 return NULL;
}

static void bond_info_seq_stop(struct seq_file *seq, void *v)
 __releases(RCU)
{
 rcu_read_unlock();
}

static void bond_info_show_master(struct seq_file *seq)
{
 struct bonding *bond = pde_data(file_inode(seq->file));
 const struct bond_opt_value *optval;
 struct slave *curr, *primary;
 int i;

 curr = rcu_dereference(bond->curr_active_slave);

 seq_printf(seq, "Bonding Mode: %s",
     bond_mode_name(BOND_MODE(bond)));

 if (BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP &&
     bond->params.fail_over_mac) {
  optval = bond_opt_get_val(BOND_OPT_FAIL_OVER_MAC,
       bond->params.fail_over_mac);
  seq_printf(seq, " (fail_over_mac %s)", optval->string);
 }

 seq_printf(seq, "\n");

 if (bond_mode_uses_xmit_hash(bond)) {
  optval = bond_opt_get_val(BOND_OPT_XMIT_HASH,
       bond->params.xmit_policy);
  seq_printf(seq, "Transmit Hash Policy: %s (%d)\n",
      optval->string, bond->params.xmit_policy);
 }

 if (bond_uses_primary(bond)) {
  primary = rcu_dereference(bond->primary_slave);
  seq_printf(seq, "Primary Slave: %s",
      primary ? primary->dev->name : "None");
  if (primary) {
   optval = bond_opt_get_val(BOND_OPT_PRIMARY_RESELECT,
        bond->params.primary_reselect);
   seq_printf(seq, " (primary_reselect %s)",
       optval->string);
  }

  seq_printf(seq, "\nCurrently Active Slave: %s\n",
      (curr) ? curr->dev->name : "None");
 }

 seq_printf(seq, "MII Status: %s\n", netif_carrier_ok(bond->dev) ?
     "up" : "down");
 seq_printf(seq, "MII Polling Interval (ms): %d\n", bond->params.miimon);
 seq_printf(seq, "Up Delay (ms): %d\n",
     bond->params.updelay * bond->params.miimon);
 seq_printf(seq, "Down Delay (ms): %d\n",
     bond->params.downdelay * bond->params.miimon);
 seq_printf(seq, "Peer Notification Delay (ms): %d\n",
     bond->params.peer_notif_delay * bond->params.miimon);


 /* ARP information */
 if (bond->params.arp_interval > 0) {
  int printed = 0;

  seq_printf(seq, "ARP Polling Interval (ms): %d\n",
    bond->params.arp_interval);
  seq_printf(seq, "ARP Missed Max: %u\n",
    bond->params.missed_max);

  seq_printf(seq, "ARP IP target/s (n.n.n.n form):");

  for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
   if (!bond->params.arp_targets[i])
    break;
   if (printed)
    seq_printf(seq, ",");
   seq_printf(seq, " %pI4", &bond->params.arp_targets[i]);
   printed = 1;
  }
  seq_printf(seq, "\n");

#if IS_ENABLED(CONFIG_IPV6)
  printed = 0;
  seq_printf(seq, "NS IPv6 target/s (xx::xx form):");

  for (i = 0; (i < BOND_MAX_NS_TARGETS); i++) {
   if (ipv6_addr_any(&bond->params.ns_targets[i]))
    break;
   if (printed)
    seq_printf(seq, ",");
   seq_printf(seq, " %pI6c", &bond->params.ns_targets[i]);
   printed = 1;
  }
  seq_printf(seq, "\n");
#endif
 }

 if (BOND_MODE(bond) == BOND_MODE_8023AD) {
  struct ad_info ad_info;

  seq_puts(seq, "\n802.3ad info\n");
  seq_printf(seq, "LACP active: %s\n",
      (bond->params.lacp_active) ? "on" : "off");
  seq_printf(seq, "LACP rate: %s\n",
      (bond->params.lacp_fast) ? "fast" : "slow");
  seq_printf(seq, "Min links: %d\n", bond->params.min_links);
  optval = bond_opt_get_val(BOND_OPT_AD_SELECT,
       bond->params.ad_select);
  seq_printf(seq, "Aggregator selection policy (ad_select): %s\n",
      optval->string);
  if (capable(CAP_NET_ADMIN)) {
   seq_printf(seq, "System priority: %d\n",
       BOND_AD_INFO(bond).system.sys_priority);
   seq_printf(seq, "System MAC address: %pM\n",
       &BOND_AD_INFO(bond).system.sys_mac_addr);

   if (__bond_3ad_get_active_agg_info(bond, &ad_info)) {
    seq_printf(seq,
        "bond %s has no active aggregator\n",
        bond->dev->name);
   } else {
    seq_printf(seq, "Active Aggregator Info:\n");

    seq_printf(seq, "\tAggregator ID: %d\n",
        ad_info.aggregator_id);
    seq_printf(seq, "\tNumber of ports: %d\n",
        ad_info.ports);
    seq_printf(seq, "\tActor Key: %d\n",
        ad_info.actor_key);
    seq_printf(seq, "\tPartner Key: %d\n",
        ad_info.partner_key);
    seq_printf(seq, "\tPartner Mac Address: %pM\n",
        ad_info.partner_system);
   }
  }
 }
}

static void bond_info_show_slave(struct seq_file *seq,
     const struct slave *slave)
{
 struct bonding *bond = pde_data(file_inode(seq->file));

 seq_printf(seq, "\nSlave Interface: %s\n", slave->dev->name);
 seq_printf(seq, "MII Status: %s\n", bond_slave_link_status(slave->link));
 if (slave->speed == SPEED_UNKNOWN)
  seq_printf(seq, "Speed: %s\n", "Unknown");
 else
  seq_printf(seq, "Speed: %d Mbps\n", slave->speed);

 if (slave->duplex == DUPLEX_UNKNOWN)
  seq_printf(seq, "Duplex: %s\n", "Unknown");
 else
  seq_printf(seq, "Duplex: %s\n", slave->duplex ? "full" : "half");

 seq_printf(seq, "Link Failure Count: %u\n",
     slave->link_failure_count);

 seq_printf(seq, "Permanent HW addr: %*phC\n",
     slave->dev->addr_len, slave->perm_hwaddr);
 seq_printf(seq, "Slave queue ID: %d\n", READ_ONCE(slave->queue_id));

 if (BOND_MODE(bond) == BOND_MODE_8023AD) {
  const struct port *port = &SLAVE_AD_INFO(slave)->port;
  const struct aggregator *agg = port->aggregator;

  if (agg) {
   seq_printf(seq, "Aggregator ID: %d\n",
       agg->aggregator_identifier);
   seq_printf(seq, "Actor Churn State: %s\n",
       bond_3ad_churn_desc(port->sm_churn_actor_state));
   seq_printf(seq, "Partner Churn State: %s\n",
       bond_3ad_churn_desc(port->sm_churn_partner_state));
   seq_printf(seq, "Actor Churned Count: %d\n",
       port->churn_actor_count);
   seq_printf(seq, "Partner Churned Count: %d\n",
       port->churn_partner_count);

   if (capable(CAP_NET_ADMIN)) {
    seq_puts(seq, "details actor lacp pdu:\n");
    seq_printf(seq, " system priority: %d\n",
        port->actor_system_priority);
    seq_printf(seq, " system mac address: %pM\n",
        &port->actor_system);
    seq_printf(seq, " port key: %d\n",
        port->actor_oper_port_key);
    seq_printf(seq, " port priority: %d\n",
        port->actor_port_priority);
    seq_printf(seq, " port number: %d\n",
        port->actor_port_number);
    seq_printf(seq, " port state: %d\n",
        port->actor_oper_port_state);

    seq_puts(seq, "details partner lacp pdu:\n");
    seq_printf(seq, " system priority: %d\n",
        port->partner_oper.system_priority);
    seq_printf(seq, " system mac address: %pM\n",
        &port->partner_oper.system);
    seq_printf(seq, " oper key: %d\n",
        port->partner_oper.key);
    seq_printf(seq, " port priority: %d\n",
        port->partner_oper.port_priority);
    seq_printf(seq, " port number: %d\n",
        port->partner_oper.port_number);
    seq_printf(seq, " port state: %d\n",
        port->partner_oper.port_state);
   }
  } else {
   seq_puts(seq, "Aggregator ID: N/A\n");
  }
 }
}

static int bond_info_seq_show(struct seq_file *seq, void *v)
{
 if (v == SEQ_START_TOKEN) {
  seq_printf(seq, "%s\n", bond_version);
  bond_info_show_master(seq);
 } else
  bond_info_show_slave(seq, v);

 return 0;
}

static const struct seq_operations bond_info_seq_ops = {
 .start = bond_info_seq_start,
 .next  = bond_info_seq_next,
 .stop  = bond_info_seq_stop,
 .show  = bond_info_seq_show,
};

void bond_create_proc_entry(struct bonding *bond)
{
 struct net_device *bond_dev = bond->dev;
 struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id);

 if (bn->proc_dir) {
  bond->proc_entry = proc_create_seq_data(bond_dev->name, 0444,
    bn->proc_dir, &bond_info_seq_ops, bond);
  if (bond->proc_entry == NULL)
   netdev_warn(bond_dev, "Cannot create /proc/net/%s/%s\n",
        DRV_NAME, bond_dev->name);
  else
   memcpy(bond->proc_file_name, bond_dev->name, IFNAMSIZ);
 }
}

void bond_remove_proc_entry(struct bonding *bond)
{
 struct net_device *bond_dev = bond->dev;
 struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id);

 if (bn->proc_dir && bond->proc_entry) {
  remove_proc_entry(bond->proc_file_name, bn->proc_dir);
  memset(bond->proc_file_name, 0, IFNAMSIZ);
  bond->proc_entry = NULL;
 }
}

/* Create the bonding directory under /proc/net, if doesn't exist yet.
 * Caller must hold rtnl_lock.
 */
void __net_init bond_create_proc_dir(struct bond_net *bn)
{
 if (!bn->proc_dir) {
  bn->proc_dir = proc_mkdir(DRV_NAME, bn->net->proc_net);
  if (!bn->proc_dir)
   pr_warn("Warning: Cannot create /proc/net/%s\n",
    DRV_NAME);
 }
}

/* Destroy the bonding directory under /proc/net, if empty.
 */
void __net_exit bond_destroy_proc_dir(struct bond_net *bn)
{
 if (bn->proc_dir) {
  remove_proc_entry(DRV_NAME, bn->net->proc_net);
  bn->proc_dir = NULL;
 }
}