forked from luck/tmp_suning_uos_patched
e9fe8efeea
Use RCU to protect against slave release, the proc show function will sync with the bond destruction by the proc locks and the fact that the bond is released after NETDEV_UNREGISTER which causes the bonding to remove the proc entry. Signed-off-by: Nikolay Aleksandrov <nikolay@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
287 lines
7.3 KiB
C
287 lines
7.3 KiB
C
#include <linux/proc_fs.h>
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#include <linux/export.h>
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#include <net/net_namespace.h>
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#include <net/netns/generic.h>
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#include "bonding.h"
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static void *bond_info_seq_start(struct seq_file *seq, loff_t *pos)
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__acquires(RCU)
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{
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struct bonding *bond = seq->private;
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struct list_head *iter;
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struct slave *slave;
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loff_t off = 0;
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rcu_read_lock();
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if (*pos == 0)
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return SEQ_START_TOKEN;
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bond_for_each_slave_rcu(bond, slave, iter)
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if (++off == *pos)
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return slave;
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return NULL;
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}
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static void *bond_info_seq_next(struct seq_file *seq, void *v, loff_t *pos)
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{
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struct bonding *bond = seq->private;
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struct list_head *iter;
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struct slave *slave;
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bool found = false;
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++*pos;
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if (v == SEQ_START_TOKEN)
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return bond_first_slave_rcu(bond);
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bond_for_each_slave_rcu(bond, slave, iter) {
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if (found)
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return slave;
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if (slave == v)
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found = true;
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}
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return NULL;
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}
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static void bond_info_seq_stop(struct seq_file *seq, void *v)
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__releases(RCU)
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{
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rcu_read_unlock();
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}
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static void bond_info_show_master(struct seq_file *seq)
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{
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struct bonding *bond = seq->private;
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const struct bond_opt_value *optval;
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struct slave *curr, *primary;
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int i;
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curr = rcu_dereference(bond->curr_active_slave);
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seq_printf(seq, "Bonding Mode: %s",
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bond_mode_name(BOND_MODE(bond)));
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if (BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP &&
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bond->params.fail_over_mac) {
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optval = bond_opt_get_val(BOND_OPT_FAIL_OVER_MAC,
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bond->params.fail_over_mac);
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seq_printf(seq, " (fail_over_mac %s)", optval->string);
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}
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seq_printf(seq, "\n");
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if (BOND_MODE(bond) == BOND_MODE_XOR ||
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BOND_MODE(bond) == BOND_MODE_8023AD) {
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optval = bond_opt_get_val(BOND_OPT_XMIT_HASH,
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bond->params.xmit_policy);
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seq_printf(seq, "Transmit Hash Policy: %s (%d)\n",
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optval->string, bond->params.xmit_policy);
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}
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if (bond_uses_primary(bond)) {
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primary = rcu_dereference(bond->primary_slave);
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seq_printf(seq, "Primary Slave: %s",
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primary ? primary->dev->name : "None");
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if (primary) {
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optval = bond_opt_get_val(BOND_OPT_PRIMARY_RESELECT,
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bond->params.primary_reselect);
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seq_printf(seq, " (primary_reselect %s)",
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optval->string);
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}
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seq_printf(seq, "\nCurrently Active Slave: %s\n",
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(curr) ? curr->dev->name : "None");
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}
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seq_printf(seq, "MII Status: %s\n", netif_carrier_ok(bond->dev) ?
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"up" : "down");
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seq_printf(seq, "MII Polling Interval (ms): %d\n", bond->params.miimon);
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seq_printf(seq, "Up Delay (ms): %d\n",
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bond->params.updelay * bond->params.miimon);
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seq_printf(seq, "Down Delay (ms): %d\n",
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bond->params.downdelay * bond->params.miimon);
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/* ARP information */
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if (bond->params.arp_interval > 0) {
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int printed = 0;
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seq_printf(seq, "ARP Polling Interval (ms): %d\n",
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bond->params.arp_interval);
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seq_printf(seq, "ARP IP target/s (n.n.n.n form):");
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for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
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if (!bond->params.arp_targets[i])
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break;
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if (printed)
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seq_printf(seq, ",");
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seq_printf(seq, " %pI4", &bond->params.arp_targets[i]);
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printed = 1;
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}
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seq_printf(seq, "\n");
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}
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if (BOND_MODE(bond) == BOND_MODE_8023AD) {
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struct ad_info ad_info;
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seq_puts(seq, "\n802.3ad info\n");
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seq_printf(seq, "LACP rate: %s\n",
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(bond->params.lacp_fast) ? "fast" : "slow");
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seq_printf(seq, "Min links: %d\n", bond->params.min_links);
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optval = bond_opt_get_val(BOND_OPT_AD_SELECT,
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bond->params.ad_select);
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seq_printf(seq, "Aggregator selection policy (ad_select): %s\n",
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optval->string);
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if (__bond_3ad_get_active_agg_info(bond, &ad_info)) {
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seq_printf(seq, "bond %s has no active aggregator\n",
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bond->dev->name);
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} else {
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seq_printf(seq, "Active Aggregator Info:\n");
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seq_printf(seq, "\tAggregator ID: %d\n",
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ad_info.aggregator_id);
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seq_printf(seq, "\tNumber of ports: %d\n",
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ad_info.ports);
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seq_printf(seq, "\tActor Key: %d\n",
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ad_info.actor_key);
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seq_printf(seq, "\tPartner Key: %d\n",
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ad_info.partner_key);
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seq_printf(seq, "\tPartner Mac Address: %pM\n",
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ad_info.partner_system);
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}
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}
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}
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static void bond_info_show_slave(struct seq_file *seq,
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const struct slave *slave)
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{
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struct bonding *bond = seq->private;
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seq_printf(seq, "\nSlave Interface: %s\n", slave->dev->name);
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seq_printf(seq, "MII Status: %s\n", bond_slave_link_status(slave->link));
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if (slave->speed == SPEED_UNKNOWN)
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seq_printf(seq, "Speed: %s\n", "Unknown");
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else
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seq_printf(seq, "Speed: %d Mbps\n", slave->speed);
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if (slave->duplex == DUPLEX_UNKNOWN)
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seq_printf(seq, "Duplex: %s\n", "Unknown");
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else
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seq_printf(seq, "Duplex: %s\n", slave->duplex ? "full" : "half");
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seq_printf(seq, "Link Failure Count: %u\n",
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slave->link_failure_count);
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seq_printf(seq, "Permanent HW addr: %pM\n", slave->perm_hwaddr);
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if (BOND_MODE(bond) == BOND_MODE_8023AD) {
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const struct aggregator *agg
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= SLAVE_AD_INFO(slave)->port.aggregator;
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if (agg)
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seq_printf(seq, "Aggregator ID: %d\n",
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agg->aggregator_identifier);
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else
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seq_puts(seq, "Aggregator ID: N/A\n");
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}
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seq_printf(seq, "Slave queue ID: %d\n", slave->queue_id);
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}
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static int bond_info_seq_show(struct seq_file *seq, void *v)
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{
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if (v == SEQ_START_TOKEN) {
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seq_printf(seq, "%s\n", bond_version);
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bond_info_show_master(seq);
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} else
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bond_info_show_slave(seq, v);
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return 0;
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}
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static const struct seq_operations bond_info_seq_ops = {
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.start = bond_info_seq_start,
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.next = bond_info_seq_next,
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.stop = bond_info_seq_stop,
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.show = bond_info_seq_show,
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};
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static int bond_info_open(struct inode *inode, struct file *file)
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{
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struct seq_file *seq;
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int res;
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res = seq_open(file, &bond_info_seq_ops);
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if (!res) {
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/* recover the pointer buried in proc_dir_entry data */
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seq = file->private_data;
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seq->private = PDE_DATA(inode);
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}
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return res;
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}
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static const struct file_operations bond_info_fops = {
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.owner = THIS_MODULE,
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.open = bond_info_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = seq_release,
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};
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void bond_create_proc_entry(struct bonding *bond)
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{
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struct net_device *bond_dev = bond->dev;
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struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id);
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if (bn->proc_dir) {
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bond->proc_entry = proc_create_data(bond_dev->name,
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S_IRUGO, bn->proc_dir,
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&bond_info_fops, bond);
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if (bond->proc_entry == NULL)
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netdev_warn(bond_dev, "Cannot create /proc/net/%s/%s\n",
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DRV_NAME, bond_dev->name);
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else
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memcpy(bond->proc_file_name, bond_dev->name, IFNAMSIZ);
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}
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}
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void bond_remove_proc_entry(struct bonding *bond)
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{
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struct net_device *bond_dev = bond->dev;
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struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id);
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if (bn->proc_dir && bond->proc_entry) {
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remove_proc_entry(bond->proc_file_name, bn->proc_dir);
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memset(bond->proc_file_name, 0, IFNAMSIZ);
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bond->proc_entry = NULL;
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}
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}
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/* Create the bonding directory under /proc/net, if doesn't exist yet.
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* Caller must hold rtnl_lock.
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*/
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void __net_init bond_create_proc_dir(struct bond_net *bn)
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{
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if (!bn->proc_dir) {
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bn->proc_dir = proc_mkdir(DRV_NAME, bn->net->proc_net);
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if (!bn->proc_dir)
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pr_warn("Warning: Cannot create /proc/net/%s\n",
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DRV_NAME);
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}
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}
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/* Destroy the bonding directory under /proc/net, if empty.
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* Caller must hold rtnl_lock.
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*/
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void __net_exit bond_destroy_proc_dir(struct bond_net *bn)
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{
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if (bn->proc_dir) {
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remove_proc_entry(DRV_NAME, bn->net->proc_net);
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bn->proc_dir = NULL;
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}
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}
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