drivers/net/bonding/bond_procfs.c - kernel/windcharger - Git at Google

 #include <linux/proc_fs.h>
 #include <linux/export.h>
 #include <net/net_namespace.h>
 #include <net/netns/generic.h>
 #include "bonding.h"


 static void *bond_info_seq_start(struct seq_file *seq, loff_t *pos)
 	__acquires(RCU)
 	__acquires(&bond->lock)
 {
 	struct bonding *bond = seq->private;
 	loff_t off = 0;
 	struct slave *slave;
 	int i;

 	/* make sure the bond won't be taken away */
 	rcu_read_lock();
 	read_lock(&bond->lock);

 	if (*pos == 0)
 		return SEQ_START_TOKEN;

 	bond_for_each_slave(bond, slave, i) {
 		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 = seq->private;
 	struct slave *slave = v;

 	++*pos;
 	if (v == SEQ_START_TOKEN)
 		return bond->first_slave;

 	slave = slave->next;

 	return (slave == bond->first_slave) ? NULL : slave;
 }

 static void bond_info_seq_stop(struct seq_file *seq, void *v)
 	__releases(&bond->lock)
 	__releases(RCU)
 {
 	struct bonding *bond = seq->private;

 	read_unlock(&bond->lock);
 	rcu_read_unlock();
 }

 static void bond_info_show_master(struct seq_file *seq)
 {
 	struct bonding *bond = seq->private;
 	struct slave *curr;
 	int i;

 	read_lock(&bond->curr_slave_lock);
 	curr = bond->curr_active_slave;
 	read_unlock(&bond->curr_slave_lock);

 	seq_printf(seq, "Bonding Mode: %s",
 		   bond_mode_name(bond->params.mode));

 	if (bond->params.mode == BOND_MODE_ACTIVEBACKUP &&
 	    bond->params.fail_over_mac)
 		seq_printf(seq, " (fail_over_mac %s)",
 		   fail_over_mac_tbl[bond->params.fail_over_mac].modename);

 	seq_printf(seq, "\n");

 	if (bond->params.mode == BOND_MODE_XOR ||
 		bond->params.mode == BOND_MODE_8023AD) {
 		seq_printf(seq, "Transmit Hash Policy: %s (%d)\n",
 			xmit_hashtype_tbl[bond->params.xmit_policy].modename,
 			bond->params.xmit_policy);
 	}

 	if (USES_PRIMARY(bond->params.mode)) {
 		seq_printf(seq, "Primary Slave: %s",
 			   (bond->primary_slave) ?
 			   bond->primary_slave->dev->name : "None");
 		if (bond->primary_slave)
 			seq_printf(seq, " (primary_reselect %s)",
 		   pri_reselect_tbl[bond->params.primary_reselect].modename);

 		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->params.mode == 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);
 		seq_printf(seq, "Aggregator selection policy (ad_select): %s\n",
 			   ad_select_tbl[bond->params.ad_select].modename);

 		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 = seq->private;

 	seq_printf(seq, "\nSlave Interface: %s\n", slave->dev->name);
 	seq_printf(seq, "MII Status: %s\n",
 		   (slave->link == BOND_LINK_UP) ?  "up" : "down");
 	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: %pM\n", slave->perm_hwaddr);

 	if (bond->params.mode == BOND_MODE_8023AD) {
 		const struct aggregator *agg
 			= SLAVE_AD_INFO(slave).port.aggregator;

 		if (agg)
 			seq_printf(seq, "Aggregator ID: %d\n",
 				   agg->aggregator_identifier);
 		else
 			seq_puts(seq, "Aggregator ID: N/A\n");
 	}
 	seq_printf(seq, "Slave queue ID: %d\n", slave->queue_id);
 }

 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,
 };

 static int bond_info_open(struct inode *inode, struct file *file)
 {
 	struct seq_file *seq;
 	struct proc_dir_entry *proc;
 	int res;

 	res = seq_open(file, &bond_info_seq_ops);
 	if (!res) {
 		/* recover the pointer buried in proc_dir_entry data */
 		seq = file->private_data;
 		proc = PDE(inode);
 		seq->private = proc->data;
 	}

 	return res;
 }

 static const struct file_operations bond_info_fops = {
 	.owner   = THIS_MODULE,
 	.open    = bond_info_open,
 	.read    = seq_read,
 	.llseek  = seq_lseek,
 	.release = seq_release,
 };

 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_data(bond_dev->name,
 						    S_IRUGO, bn->proc_dir,
 						    &bond_info_fops, bond);
 		if (bond->proc_entry == NULL)
 			pr_warning("Warning: 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_warning("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;
 	}
 }
	#include <linux/proc_fs.h>
	#include <linux/export.h>
	#include <net/net_namespace.h>
	#include <net/netns/generic.h>
	#include "bonding.h"


	static void bond_info_seq_start(struct seq_file seq, loff_t *pos)
	__acquires(RCU)
	__acquires(&bond->lock)
	{
	struct bonding *bond = seq->private;
	loff_t off = 0;
	struct slave *slave;
	int i;

	/* make sure the bond won't be taken away */
	rcu_read_lock();
	read_lock(&bond->lock);

	if (*pos == 0)
	return SEQ_START_TOKEN;

	bond_for_each_slave(bond, slave, i) {
	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 = seq->private;
	struct slave *slave = v;

	++*pos;
	if (v == SEQ_START_TOKEN)
	return bond->first_slave;

	slave = slave->next;

	return (slave == bond->first_slave) ? NULL : slave;
	}

	static void bond_info_seq_stop(struct seq_file seq, void v)
	__releases(&bond->lock)
	__releases(RCU)
	{
	struct bonding *bond = seq->private;

	read_unlock(&bond->lock);
	rcu_read_unlock();
	}

	static void bond_info_show_master(struct seq_file *seq)
	{
	struct bonding *bond = seq->private;
	struct slave *curr;
	int i;

	read_lock(&bond->curr_slave_lock);
	curr = bond->curr_active_slave;
	read_unlock(&bond->curr_slave_lock);

	seq_printf(seq, "Bonding Mode: %s",
	bond_mode_name(bond->params.mode));

	if (bond->params.mode == BOND_MODE_ACTIVEBACKUP &&
	bond->params.fail_over_mac)
	seq_printf(seq, " (fail_over_mac %s)",
	fail_over_mac_tbl[bond->params.fail_over_mac].modename);

	seq_printf(seq, "\n");

	if (bond->params.mode == BOND_MODE_XOR \|\|
	bond->params.mode == BOND_MODE_8023AD) {
	seq_printf(seq, "Transmit Hash Policy: %s (%d)\n",
	xmit_hashtype_tbl[bond->params.xmit_policy].modename,
	bond->params.xmit_policy);
	}

	if (USES_PRIMARY(bond->params.mode)) {
	seq_printf(seq, "Primary Slave: %s",
	(bond->primary_slave) ?
	bond->primary_slave->dev->name : "None");
	if (bond->primary_slave)
	seq_printf(seq, " (primary_reselect %s)",
	pri_reselect_tbl[bond->params.primary_reselect].modename);

	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->params.mode == 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);
	seq_printf(seq, "Aggregator selection policy (ad_select): %s\n",
	ad_select_tbl[bond->params.ad_select].modename);

	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 = seq->private;

	seq_printf(seq, "\nSlave Interface: %s\n", slave->dev->name);
	seq_printf(seq, "MII Status: %s\n",
	(slave->link == BOND_LINK_UP) ? "up" : "down");
	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: %pM\n", slave->perm_hwaddr);

	if (bond->params.mode == BOND_MODE_8023AD) {
	const struct aggregator *agg
	= SLAVE_AD_INFO(slave).port.aggregator;

	if (agg)
	seq_printf(seq, "Aggregator ID: %d\n",
	agg->aggregator_identifier);
	else
	seq_puts(seq, "Aggregator ID: N/A\n");
	}
	seq_printf(seq, "Slave queue ID: %d\n", slave->queue_id);
	}

	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,
	};

	static int bond_info_open(struct inode inode, struct file file)
	{
	struct seq_file *seq;
	struct proc_dir_entry *proc;
	int res;

	res = seq_open(file, &bond_info_seq_ops);
	if (!res) {
	/* recover the pointer buried in proc_dir_entry data */
	seq = file->private_data;
	proc = PDE(inode);
	seq->private = proc->data;
	}

	return res;
	}

	static const struct file_operations bond_info_fops = {
	.owner = THIS_MODULE,
	.open = bond_info_open,
	.read = seq_read,
	.llseek = seq_lseek,
	.release = seq_release,
	};

	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_data(bond_dev->name,
	S_IRUGO, bn->proc_dir,
	&bond_info_fops, bond);
	if (bond->proc_entry == NULL)
	pr_warning("Warning: 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_warning("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;
	}
	}