1 files changed, 310 insertions, 0 deletions

diff --git a/drivers/net/bonding/bond_procfs.c b/drivers/net/bonding/bond_procfs.c
new file mode 100644
index 000000000..9f7d83e82
--- /dev/null
+++ b/drivers/net/bonding/bond_procfs.c
@@ -0,0 +1,310 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/proc_fs.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);
+
+
+	/* 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 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 (BOND_MODE(bond) == BOND_MODE_8023AD) {
+		struct ad_info ad_info;
+
+		seq_puts(seq, "\n802.3ad info\n");
+		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", 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.
+ * Caller must hold rtnl_lock.
+ */
+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;
+	}
+}