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linux/drivers/net/bonding/bond_sysfs.c
Nicolas de Pesloüan 79236680bd bonding: fix a buffer overflow in bonding_show_queue_id. 
The test for buffer overflow ensures we have room for 6 more bytes.
sprintf, called with %s:%d, slave->dev->name, slave->queue_id may yield
far more than 6 bytes.

The correct test is res > (PAGE_SIZE - IFNAMSIZ - 6) .

Signed-off-by: Nicolas de Pesloüan <nicolas.2p.debian@free.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>
2010-07-14 18:24:54 -07:00

1667 lines
43 KiB
C
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/*
* Copyright(c) 2004-2005 Intel Corporation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* The full GNU General Public License is included in this distribution in the
* file called LICENSE.
*
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/device.h>
#include <linux/sched.h>
#include <linux/sysdev.h>
#include <linux/fs.h>
#include <linux/types.h>
#include <linux/string.h>
#include <linux/netdevice.h>
#include <linux/inetdevice.h>
#include <linux/in.h>
#include <linux/sysfs.h>
#include <linux/ctype.h>
#include <linux/inet.h>
#include <linux/rtnetlink.h>
#include <linux/etherdevice.h>
#include <net/net_namespace.h>
#include <net/netns/generic.h>
#include <linux/nsproxy.h>
#include "bonding.h"
#define to_dev(obj) container_of(obj, struct device, kobj)
#define to_bond(cd) ((struct bonding *)(netdev_priv(to_net_dev(cd))))
/*
* "show" function for the bond_masters attribute.
* The class parameter is ignored.
*/
static ssize_t bonding_show_bonds(struct class *cls,
struct class_attribute *attr,
char *buf)
{
struct net *net = current->nsproxy->net_ns;
struct bond_net *bn = net_generic(net, bond_net_id);
int res = 0;
struct bonding *bond;
rtnl_lock();
list_for_each_entry(bond, &bn->dev_list, bond_list) {
if (res > (PAGE_SIZE - IFNAMSIZ)) {
/* not enough space for another interface name */
if ((PAGE_SIZE - res) > 10)
res = PAGE_SIZE - 10;
res += sprintf(buf + res, "++more++ ");
break;
}
res += sprintf(buf + res, "%s ", bond->dev->name);
}
if (res)
buf[res-1] = '\n'; /* eat the leftover space */
rtnl_unlock();
return res;
}
static struct net_device *bond_get_by_name(struct net *net, const char *ifname)
{
struct bond_net *bn = net_generic(net, bond_net_id);
struct bonding *bond;
list_for_each_entry(bond, &bn->dev_list, bond_list) {
if (strncmp(bond->dev->name, ifname, IFNAMSIZ) == 0)
return bond->dev;
}
return NULL;
}
/*
* "store" function for the bond_masters attribute. This is what
* creates and deletes entire bonds.
*
* The class parameter is ignored.
*
*/
static ssize_t bonding_store_bonds(struct class *cls,
struct class_attribute *attr,
const char *buffer, size_t count)
{
struct net *net = current->nsproxy->net_ns;
char command[IFNAMSIZ + 1] = {0, };
char *ifname;
int rv, res = count;
sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
ifname = command + 1;
if ((strlen(command) <= 1) ||
!dev_valid_name(ifname))
goto err_no_cmd;
if (command[0] == '+') {
pr_info("%s is being created...\n", ifname);
rv = bond_create(net, ifname);
if (rv) {
pr_info("Bond creation failed.\n");
res = rv;
}
} else if (command[0] == '-') {
struct net_device *bond_dev;
rtnl_lock();
bond_dev = bond_get_by_name(net, ifname);
if (bond_dev) {
pr_info("%s is being deleted...\n", ifname);
unregister_netdevice(bond_dev);
} else {
pr_err("unable to delete non-existent %s\n", ifname);
res = -ENODEV;
}
rtnl_unlock();
} else
goto err_no_cmd;
/* Always return either count or an error. If you return 0, you'll
* get called forever, which is bad.
*/
return res;
err_no_cmd:
pr_err("no command found in bonding_masters. Use +ifname or -ifname.\n");
return -EPERM;
}
/* class attribute for bond_masters file. This ends up in /sys/class/net */
static CLASS_ATTR(bonding_masters, S_IWUSR | S_IRUGO,
bonding_show_bonds, bonding_store_bonds);
int bond_create_slave_symlinks(struct net_device *master,
struct net_device *slave)
{
char linkname[IFNAMSIZ+7];
int ret = 0;
/* first, create a link from the slave back to the master */
ret = sysfs_create_link(&(slave->dev.kobj), &(master->dev.kobj),
"master");
if (ret)
return ret;
/* next, create a link from the master to the slave */
sprintf(linkname, "slave_%s", slave->name);
ret = sysfs_create_link(&(master->dev.kobj), &(slave->dev.kobj),
linkname);
return ret;
}
void bond_destroy_slave_symlinks(struct net_device *master,
struct net_device *slave)
{
char linkname[IFNAMSIZ+7];
sysfs_remove_link(&(slave->dev.kobj), "master");
sprintf(linkname, "slave_%s", slave->name);
sysfs_remove_link(&(master->dev.kobj), linkname);
}
/*
* Show the slaves in the current bond.
*/
static ssize_t bonding_show_slaves(struct device *d,
struct device_attribute *attr, char *buf)
{
struct slave *slave;
int i, res = 0;
struct bonding *bond = to_bond(d);
read_lock(&bond->lock);
bond_for_each_slave(bond, slave, i) {
if (res > (PAGE_SIZE - IFNAMSIZ)) {
/* not enough space for another interface name */
if ((PAGE_SIZE - res) > 10)
res = PAGE_SIZE - 10;
res += sprintf(buf + res, "++more++ ");
break;
}
res += sprintf(buf + res, "%s ", slave->dev->name);
}
read_unlock(&bond->lock);
if (res)
buf[res-1] = '\n'; /* eat the leftover space */
return res;
}
/*
* Set the slaves in the current bond. The bond interface must be
* up for this to succeed.
* This is supposed to be only thin wrapper for bond_enslave and bond_release.
* All hard work should be done there.
*/
static ssize_t bonding_store_slaves(struct device *d,
struct device_attribute *attr,
const char *buffer, size_t count)
{
char command[IFNAMSIZ + 1] = { 0, };
char *ifname;
int res, ret = count;
struct net_device *dev;
struct bonding *bond = to_bond(d);
/* Quick sanity check -- is the bond interface up? */
if (!(bond->dev->flags & IFF_UP)) {
pr_warning("%s: doing slave updates when interface is down.\n",
bond->dev->name);
}
if (!rtnl_trylock())
return restart_syscall();
sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
ifname = command + 1;
if ((strlen(command) <= 1) ||
!dev_valid_name(ifname))
goto err_no_cmd;
dev = __dev_get_by_name(dev_net(bond->dev), ifname);
if (!dev) {
pr_info("%s: Interface %s does not exist!\n",
bond->dev->name, ifname);
ret = -ENODEV;
goto out;
}
switch (command[0]) {
case '+':
pr_info("%s: Adding slave %s.\n", bond->dev->name, dev->name);
res = bond_enslave(bond->dev, dev);
break;
case '-':
pr_info("%s: Removing slave %s.\n", bond->dev->name, dev->name);
res = bond_release(bond->dev, dev);
break;
default:
goto err_no_cmd;
}
if (res)
ret = res;
goto out;
err_no_cmd:
pr_err("no command found in slaves file for bond %s. Use +ifname or -ifname.\n",
bond->dev->name);
ret = -EPERM;
out:
rtnl_unlock();
return ret;
}
static DEVICE_ATTR(slaves, S_IRUGO | S_IWUSR, bonding_show_slaves,
bonding_store_slaves);
/*
* Show and set the bonding mode. The bond interface must be down to
* change the mode.
*/
static ssize_t bonding_show_mode(struct device *d,
struct device_attribute *attr, char *buf)
{
struct bonding *bond = to_bond(d);
return sprintf(buf, "%s %d\n",
bond_mode_tbl[bond->params.mode].modename,
bond->params.mode);
}
static ssize_t bonding_store_mode(struct device *d,
struct device_attribute *attr,
const char *buf, size_t count)
{
int new_value, ret = count;
struct bonding *bond = to_bond(d);
if (bond->dev->flags & IFF_UP) {
pr_err("unable to update mode of %s because interface is up.\n",
bond->dev->name);
ret = -EPERM;
goto out;
}
new_value = bond_parse_parm(buf, bond_mode_tbl);
if (new_value < 0) {
pr_err("%s: Ignoring invalid mode value %.*s.\n",
bond->dev->name, (int)strlen(buf) - 1, buf);
ret = -EINVAL;
goto out;
} else {
if (bond->params.mode == BOND_MODE_8023AD)
bond_unset_master_3ad_flags(bond);
if (bond->params.mode == BOND_MODE_ALB)
bond_unset_master_alb_flags(bond);
bond->params.mode = new_value;
bond_set_mode_ops(bond, bond->params.mode);
pr_info("%s: setting mode to %s (%d).\n",
bond->dev->name, bond_mode_tbl[new_value].modename,
new_value);
}
out:
return ret;
}
static DEVICE_ATTR(mode, S_IRUGO | S_IWUSR,
bonding_show_mode, bonding_store_mode);
/*
* Show and set the bonding transmit hash method.
* The bond interface must be down to change the xmit hash policy.
*/
static ssize_t bonding_show_xmit_hash(struct device *d,
struct device_attribute *attr,
char *buf)
{
struct bonding *bond = to_bond(d);
return sprintf(buf, "%s %d\n",
xmit_hashtype_tbl[bond->params.xmit_policy].modename,
bond->params.xmit_policy);
}
static ssize_t bonding_store_xmit_hash(struct device *d,
struct device_attribute *attr,
const char *buf, size_t count)
{
int new_value, ret = count;
struct bonding *bond = to_bond(d);
if (bond->dev->flags & IFF_UP) {
pr_err("%s: Interface is up. Unable to update xmit policy.\n",
bond->dev->name);
ret = -EPERM;
goto out;
}
new_value = bond_parse_parm(buf, xmit_hashtype_tbl);
if (new_value < 0) {
pr_err("%s: Ignoring invalid xmit hash policy value %.*s.\n",
bond->dev->name,
(int)strlen(buf) - 1, buf);
ret = -EINVAL;
goto out;
} else {
bond->params.xmit_policy = new_value;
bond_set_mode_ops(bond, bond->params.mode);
pr_info("%s: setting xmit hash policy to %s (%d).\n",
bond->dev->name,
xmit_hashtype_tbl[new_value].modename, new_value);
}
out:
return ret;
}
static DEVICE_ATTR(xmit_hash_policy, S_IRUGO | S_IWUSR,
bonding_show_xmit_hash, bonding_store_xmit_hash);
/*
* Show and set arp_validate.
*/
static ssize_t bonding_show_arp_validate(struct device *d,
struct device_attribute *attr,
char *buf)
{
struct bonding *bond = to_bond(d);
return sprintf(buf, "%s %d\n",
arp_validate_tbl[bond->params.arp_validate].modename,
bond->params.arp_validate);
}
static ssize_t bonding_store_arp_validate(struct device *d,
struct device_attribute *attr,
const char *buf, size_t count)
{
int new_value;
struct bonding *bond = to_bond(d);
new_value = bond_parse_parm(buf, arp_validate_tbl);
if (new_value < 0) {
pr_err("%s: Ignoring invalid arp_validate value %s\n",
bond->dev->name, buf);
return -EINVAL;
}
if (new_value && (bond->params.mode != BOND_MODE_ACTIVEBACKUP)) {
pr_err("%s: arp_validate only supported in active-backup mode.\n",
bond->dev->name);
return -EINVAL;
}
pr_info("%s: setting arp_validate to %s (%d).\n",
bond->dev->name, arp_validate_tbl[new_value].modename,
new_value);
if (!bond->params.arp_validate && new_value)
bond_register_arp(bond);
else if (bond->params.arp_validate && !new_value)
bond_unregister_arp(bond);
bond->params.arp_validate = new_value;
return count;
}
static DEVICE_ATTR(arp_validate, S_IRUGO | S_IWUSR, bonding_show_arp_validate,
bonding_store_arp_validate);
/*
* Show and store fail_over_mac. User only allowed to change the
* value when there are no slaves.
*/
static ssize_t bonding_show_fail_over_mac(struct device *d,
struct device_attribute *attr,
char *buf)
{
struct bonding *bond = to_bond(d);
return sprintf(buf, "%s %d\n",
fail_over_mac_tbl[bond->params.fail_over_mac].modename,
bond->params.fail_over_mac);
}
static ssize_t bonding_store_fail_over_mac(struct device *d,
struct device_attribute *attr,
const char *buf, size_t count)
{
int new_value;
struct bonding *bond = to_bond(d);
if (bond->slave_cnt != 0) {
pr_err("%s: Can't alter fail_over_mac with slaves in bond.\n",
bond->dev->name);
return -EPERM;
}
new_value = bond_parse_parm(buf, fail_over_mac_tbl);
if (new_value < 0) {
pr_err("%s: Ignoring invalid fail_over_mac value %s.\n",
bond->dev->name, buf);
return -EINVAL;
}
bond->params.fail_over_mac = new_value;
pr_info("%s: Setting fail_over_mac to %s (%d).\n",
bond->dev->name, fail_over_mac_tbl[new_value].modename,
new_value);
return count;
}
static DEVICE_ATTR(fail_over_mac, S_IRUGO | S_IWUSR,
bonding_show_fail_over_mac, bonding_store_fail_over_mac);
/*
* Show and set the arp timer interval. There are two tricky bits
* here. First, if ARP monitoring is activated, then we must disable
* MII monitoring. Second, if the ARP timer isn't running, we must
* start it.
*/
static ssize_t bonding_show_arp_interval(struct device *d,
struct device_attribute *attr,
char *buf)
{
struct bonding *bond = to_bond(d);
return sprintf(buf, "%d\n", bond->params.arp_interval);
}
static ssize_t bonding_store_arp_interval(struct device *d,
struct device_attribute *attr,
const char *buf, size_t count)
{
int new_value, ret = count;
struct bonding *bond = to_bond(d);
if (sscanf(buf, "%d", &new_value) != 1) {
pr_err("%s: no arp_interval value specified.\n",
bond->dev->name);
ret = -EINVAL;
goto out;
}
if (new_value < 0) {
pr_err("%s: Invalid arp_interval value %d not in range 1-%d; rejected.\n",
bond->dev->name, new_value, INT_MAX);
ret = -EINVAL;
goto out;
}
pr_info("%s: Setting ARP monitoring interval to %d.\n",
bond->dev->name, new_value);
bond->params.arp_interval = new_value;
if (bond->params.arp_interval)
bond->dev->priv_flags |= IFF_MASTER_ARPMON;
if (bond->params.miimon) {
pr_info("%s: ARP monitoring cannot be used with MII monitoring. %s Disabling MII monitoring.\n",
bond->dev->name, bond->dev->name);
bond->params.miimon = 0;
if (delayed_work_pending(&bond->mii_work)) {
cancel_delayed_work(&bond->mii_work);
flush_workqueue(bond->wq);
}
}
if (!bond->params.arp_targets[0]) {
pr_info("%s: ARP monitoring has been set up, but no ARP targets have been specified.\n",
bond->dev->name);
}
if (bond->dev->flags & IFF_UP) {
/* If the interface is up, we may need to fire off
* the ARP timer. If the interface is down, the
* timer will get fired off when the open function
* is called.
*/
if (!delayed_work_pending(&bond->arp_work)) {
if (bond->params.mode == BOND_MODE_ACTIVEBACKUP)
INIT_DELAYED_WORK(&bond->arp_work,
bond_activebackup_arp_mon);
else
INIT_DELAYED_WORK(&bond->arp_work,
bond_loadbalance_arp_mon);
queue_delayed_work(bond->wq, &bond->arp_work, 0);
}
}
out:
return ret;
}
static DEVICE_ATTR(arp_interval, S_IRUGO | S_IWUSR,
bonding_show_arp_interval, bonding_store_arp_interval);
/*
* Show and set the arp targets.
*/
static ssize_t bonding_show_arp_targets(struct device *d,
struct device_attribute *attr,
char *buf)
{
int i, res = 0;
struct bonding *bond = to_bond(d);
for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
if (bond->params.arp_targets[i])
res += sprintf(buf + res, "%pI4 ",
&bond->params.arp_targets[i]);
}
if (res)
buf[res-1] = '\n'; /* eat the leftover space */
return res;
}
static ssize_t bonding_store_arp_targets(struct device *d,
struct device_attribute *attr,
const char *buf, size_t count)
{
__be32 newtarget;
int i = 0, done = 0, ret = count;
struct bonding *bond = to_bond(d);
__be32 *targets;
targets = bond->params.arp_targets;
newtarget = in_aton(buf + 1);
/* look for adds */
if (buf[0] == '+') {
if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
pr_err("%s: invalid ARP target %pI4 specified for addition\n",
bond->dev->name, &newtarget);
ret = -EINVAL;
goto out;
}
/* look for an empty slot to put the target in, and check for dupes */
for (i = 0; (i < BOND_MAX_ARP_TARGETS) && !done; i++) {
if (targets[i] == newtarget) { /* duplicate */
pr_err("%s: ARP target %pI4 is already present\n",
bond->dev->name, &newtarget);
ret = -EINVAL;
goto out;
}
if (targets[i] == 0) {
pr_info("%s: adding ARP target %pI4.\n",
bond->dev->name, &newtarget);
done = 1;
targets[i] = newtarget;
}
}
if (!done) {
pr_err("%s: ARP target table is full!\n",
bond->dev->name);
ret = -EINVAL;
goto out;
}
} else if (buf[0] == '-') {
if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
pr_err("%s: invalid ARP target %pI4 specified for removal\n",
bond->dev->name, &newtarget);
ret = -EINVAL;
goto out;
}
for (i = 0; (i < BOND_MAX_ARP_TARGETS) && !done; i++) {
if (targets[i] == newtarget) {
int j;
pr_info("%s: removing ARP target %pI4.\n",
bond->dev->name, &newtarget);
for (j = i; (j < (BOND_MAX_ARP_TARGETS-1)) && targets[j+1]; j++)
targets[j] = targets[j+1];
targets[j] = 0;
done = 1;
}
}
if (!done) {
pr_info("%s: unable to remove nonexistent ARP target %pI4.\n",
bond->dev->name, &newtarget);
ret = -EINVAL;
goto out;
}
} else {
pr_err("no command found in arp_ip_targets file for bond %s. Use +<addr> or -<addr>.\n",
bond->dev->name);
ret = -EPERM;
goto out;
}
out:
return ret;
}
static DEVICE_ATTR(arp_ip_target, S_IRUGO | S_IWUSR , bonding_show_arp_targets, bonding_store_arp_targets);
/*
* Show and set the up and down delays. These must be multiples of the
* MII monitoring value, and are stored internally as the multiplier.
* Thus, we must translate to MS for the real world.
*/
static ssize_t bonding_show_downdelay(struct device *d,
struct device_attribute *attr,
char *buf)
{
struct bonding *bond = to_bond(d);
return sprintf(buf, "%d\n", bond->params.downdelay * bond->params.miimon);
}
static ssize_t bonding_store_downdelay(struct device *d,
struct device_attribute *attr,
const char *buf, size_t count)
{
int new_value, ret = count;
struct bonding *bond = to_bond(d);
if (!(bond->params.miimon)) {
pr_err("%s: Unable to set down delay as MII monitoring is disabled\n",
bond->dev->name);
ret = -EPERM;
goto out;
}
if (sscanf(buf, "%d", &new_value) != 1) {
pr_err("%s: no down delay value specified.\n", bond->dev->name);
ret = -EINVAL;
goto out;
}
if (new_value < 0) {
pr_err("%s: Invalid down delay value %d not in range %d-%d; rejected.\n",
bond->dev->name, new_value, 1, INT_MAX);
ret = -EINVAL;
goto out;
} else {
if ((new_value % bond->params.miimon) != 0) {
pr_warning("%s: Warning: down delay (%d) is not a multiple of miimon (%d), delay rounded to %d ms\n",
bond->dev->name, new_value,
bond->params.miimon,
(new_value / bond->params.miimon) *
bond->params.miimon);
}
bond->params.downdelay = new_value / bond->params.miimon;
pr_info("%s: Setting down delay to %d.\n",
bond->dev->name,
bond->params.downdelay * bond->params.miimon);
}
out:
return ret;
}
static DEVICE_ATTR(downdelay, S_IRUGO | S_IWUSR,
bonding_show_downdelay, bonding_store_downdelay);
static ssize_t bonding_show_updelay(struct device *d,
struct device_attribute *attr,
char *buf)
{
struct bonding *bond = to_bond(d);
return sprintf(buf, "%d\n", bond->params.updelay * bond->params.miimon);
}
static ssize_t bonding_store_updelay(struct device *d,
struct device_attribute *attr,
const char *buf, size_t count)
{
int new_value, ret = count;
struct bonding *bond = to_bond(d);
if (!(bond->params.miimon)) {
pr_err("%s: Unable to set up delay as MII monitoring is disabled\n",
bond->dev->name);
ret = -EPERM;
goto out;
}
if (sscanf(buf, "%d", &new_value) != 1) {
pr_err("%s: no up delay value specified.\n",
bond->dev->name);
ret = -EINVAL;
goto out;
}
if (new_value < 0) {
pr_err("%s: Invalid down delay value %d not in range %d-%d; rejected.\n",
bond->dev->name, new_value, 1, INT_MAX);
ret = -EINVAL;
goto out;
} else {
if ((new_value % bond->params.miimon) != 0) {
pr_warning("%s: Warning: up delay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n",
bond->dev->name, new_value,
bond->params.miimon,
(new_value / bond->params.miimon) *
bond->params.miimon);
}
bond->params.updelay = new_value / bond->params.miimon;
pr_info("%s: Setting up delay to %d.\n",
bond->dev->name,
bond->params.updelay * bond->params.miimon);
}
out:
return ret;
}
static DEVICE_ATTR(updelay, S_IRUGO | S_IWUSR,
bonding_show_updelay, bonding_store_updelay);
/*
* Show and set the LACP interval. Interface must be down, and the mode
* must be set to 802.3ad mode.
*/
static ssize_t bonding_show_lacp(struct device *d,
struct device_attribute *attr,
char *buf)
{
struct bonding *bond = to_bond(d);
return sprintf(buf, "%s %d\n",
bond_lacp_tbl[bond->params.lacp_fast].modename,
bond->params.lacp_fast);
}
static ssize_t bonding_store_lacp(struct device *d,
struct device_attribute *attr,
const char *buf, size_t count)
{
int new_value, ret = count;
struct bonding *bond = to_bond(d);
if (bond->dev->flags & IFF_UP) {
pr_err("%s: Unable to update LACP rate because interface is up.\n",
bond->dev->name);
ret = -EPERM;
goto out;
}
if (bond->params.mode != BOND_MODE_8023AD) {
pr_err("%s: Unable to update LACP rate because bond is not in 802.3ad mode.\n",
bond->dev->name);
ret = -EPERM;
goto out;
}
new_value = bond_parse_parm(buf, bond_lacp_tbl);
if ((new_value == 1) || (new_value == 0)) {
bond->params.lacp_fast = new_value;
pr_info("%s: Setting LACP rate to %s (%d).\n",
bond->dev->name, bond_lacp_tbl[new_value].modename,
new_value);
} else {
pr_err("%s: Ignoring invalid LACP rate value %.*s.\n",
bond->dev->name, (int)strlen(buf) - 1, buf);
ret = -EINVAL;
}
out:
return ret;
}
static DEVICE_ATTR(lacp_rate, S_IRUGO | S_IWUSR,
bonding_show_lacp, bonding_store_lacp);
static ssize_t bonding_show_ad_select(struct device *d,
struct device_attribute *attr,
char *buf)
{
struct bonding *bond = to_bond(d);
return sprintf(buf, "%s %d\n",
ad_select_tbl[bond->params.ad_select].modename,
bond->params.ad_select);
}
static ssize_t bonding_store_ad_select(struct device *d,
struct device_attribute *attr,
const char *buf, size_t count)
{
int new_value, ret = count;
struct bonding *bond = to_bond(d);
if (bond->dev->flags & IFF_UP) {
pr_err("%s: Unable to update ad_select because interface is up.\n",
bond->dev->name);
ret = -EPERM;
goto out;
}
new_value = bond_parse_parm(buf, ad_select_tbl);
if (new_value != -1) {
bond->params.ad_select = new_value;
pr_info("%s: Setting ad_select to %s (%d).\n",
bond->dev->name, ad_select_tbl[new_value].modename,
new_value);
} else {
pr_err("%s: Ignoring invalid ad_select value %.*s.\n",
bond->dev->name, (int)strlen(buf) - 1, buf);
ret = -EINVAL;
}
out:
return ret;
}
static DEVICE_ATTR(ad_select, S_IRUGO | S_IWUSR,
bonding_show_ad_select, bonding_store_ad_select);
/*
* Show and set the number of grat ARP to send after a failover event.
*/
static ssize_t bonding_show_n_grat_arp(struct device *d,
struct device_attribute *attr,
char *buf)
{
struct bonding *bond = to_bond(d);
return sprintf(buf, "%d\n", bond->params.num_grat_arp);
}
static ssize_t bonding_store_n_grat_arp(struct device *d,
struct device_attribute *attr,
const char *buf, size_t count)
{
int new_value, ret = count;
struct bonding *bond = to_bond(d);
if (sscanf(buf, "%d", &new_value) != 1) {
pr_err("%s: no num_grat_arp value specified.\n",
bond->dev->name);
ret = -EINVAL;
goto out;
}
if (new_value < 0 || new_value > 255) {
pr_err("%s: Invalid num_grat_arp value %d not in range 0-255; rejected.\n",
bond->dev->name, new_value);
ret = -EINVAL;
goto out;
} else {
bond->params.num_grat_arp = new_value;
}
out:
return ret;
}
static DEVICE_ATTR(num_grat_arp, S_IRUGO | S_IWUSR,
bonding_show_n_grat_arp, bonding_store_n_grat_arp);
/*
* Show and set the number of unsolicited NA's to send after a failover event.
*/
static ssize_t bonding_show_n_unsol_na(struct device *d,
struct device_attribute *attr,
char *buf)
{
struct bonding *bond = to_bond(d);
return sprintf(buf, "%d\n", bond->params.num_unsol_na);
}
static ssize_t bonding_store_n_unsol_na(struct device *d,
struct device_attribute *attr,
const char *buf, size_t count)
{
int new_value, ret = count;
struct bonding *bond = to_bond(d);
if (sscanf(buf, "%d", &new_value) != 1) {
pr_err("%s: no num_unsol_na value specified.\n",
bond->dev->name);
ret = -EINVAL;
goto out;
}
if (new_value < 0 || new_value > 255) {
pr_err("%s: Invalid num_unsol_na value %d not in range 0-255; rejected.\n",
bond->dev->name, new_value);
ret = -EINVAL;
goto out;
} else
bond->params.num_unsol_na = new_value;
out:
return ret;
}
static DEVICE_ATTR(num_unsol_na, S_IRUGO | S_IWUSR,
bonding_show_n_unsol_na, bonding_store_n_unsol_na);
/*
* Show and set the MII monitor interval. There are two tricky bits
* here. First, if MII monitoring is activated, then we must disable
* ARP monitoring. Second, if the timer isn't running, we must
* start it.
*/
static ssize_t bonding_show_miimon(struct device *d,
struct device_attribute *attr,
char *buf)
{
struct bonding *bond = to_bond(d);
return sprintf(buf, "%d\n", bond->params.miimon);
}
static ssize_t bonding_store_miimon(struct device *d,
struct device_attribute *attr,
const char *buf, size_t count)
{
int new_value, ret = count;
struct bonding *bond = to_bond(d);
if (sscanf(buf, "%d", &new_value) != 1) {
pr_err("%s: no miimon value specified.\n",
bond->dev->name);
ret = -EINVAL;
goto out;
}
if (new_value < 0) {
pr_err("%s: Invalid miimon value %d not in range %d-%d; rejected.\n",
bond->dev->name, new_value, 1, INT_MAX);
ret = -EINVAL;
goto out;
} else {
pr_info("%s: Setting MII monitoring interval to %d.\n",
bond->dev->name, new_value);
bond->params.miimon = new_value;
if (bond->params.updelay)
pr_info("%s: Note: Updating updelay (to %d) since it is a multiple of the miimon value.\n",
bond->dev->name,
bond->params.updelay * bond->params.miimon);
if (bond->params.downdelay)
pr_info("%s: Note: Updating downdelay (to %d) since it is a multiple of the miimon value.\n",
bond->dev->name,
bond->params.downdelay * bond->params.miimon);
if (bond->params.arp_interval) {
pr_info("%s: MII monitoring cannot be used with ARP monitoring. Disabling ARP monitoring...\n",
bond->dev->name);
bond->params.arp_interval = 0;
bond->dev->priv_flags &= ~IFF_MASTER_ARPMON;
if (bond->params.arp_validate) {
bond_unregister_arp(bond);
bond->params.arp_validate =
BOND_ARP_VALIDATE_NONE;
}
if (delayed_work_pending(&bond->arp_work)) {
cancel_delayed_work(&bond->arp_work);
flush_workqueue(bond->wq);
}
}
if (bond->dev->flags & IFF_UP) {
/* If the interface is up, we may need to fire off
* the MII timer. If the interface is down, the
* timer will get fired off when the open function
* is called.
*/
if (!delayed_work_pending(&bond->mii_work)) {
INIT_DELAYED_WORK(&bond->mii_work,
bond_mii_monitor);
queue_delayed_work(bond->wq,
&bond->mii_work, 0);
}
}
}
out:
return ret;
}
static DEVICE_ATTR(miimon, S_IRUGO | S_IWUSR,
bonding_show_miimon, bonding_store_miimon);
/*
* Show and set the primary slave. The store function is much
* simpler than bonding_store_slaves function because it only needs to
* handle one interface name.
* The bond must be a mode that supports a primary for this be
* set.
*/
static ssize_t bonding_show_primary(struct device *d,
struct device_attribute *attr,
char *buf)
{
int count = 0;
struct bonding *bond = to_bond(d);
if (bond->primary_slave)
count = sprintf(buf, "%s\n", bond->primary_slave->dev->name);
return count;
}
static ssize_t bonding_store_primary(struct device *d,
struct device_attribute *attr,
const char *buf, size_t count)
{
int i;
struct slave *slave;
struct bonding *bond = to_bond(d);
if (!rtnl_trylock())
return restart_syscall();
read_lock(&bond->lock);
write_lock_bh(&bond->curr_slave_lock);
if (!USES_PRIMARY(bond->params.mode)) {
pr_info("%s: Unable to set primary slave; %s is in mode %d\n",
bond->dev->name, bond->dev->name, bond->params.mode);
} else {
bond_for_each_slave(bond, slave, i) {
if (strnicmp
(slave->dev->name, buf,
strlen(slave->dev->name)) == 0) {
pr_info("%s: Setting %s as primary slave.\n",
bond->dev->name, slave->dev->name);
bond->primary_slave = slave;
strcpy(bond->params.primary, slave->dev->name);
bond_select_active_slave(bond);
goto out;
}
}
/* if we got here, then we didn't match the name of any slave */
if (strlen(buf) == 0 || buf[0] == '\n') {
pr_info("%s: Setting primary slave to None.\n",
bond->dev->name);
bond->primary_slave = NULL;
bond_select_active_slave(bond);
} else {
pr_info("%s: Unable to set %.*s as primary slave as it is not a slave.\n",
bond->dev->name, (int)strlen(buf) - 1, buf);
}
}
out:
write_unlock_bh(&bond->curr_slave_lock);
read_unlock(&bond->lock);
rtnl_unlock();
return count;
}
static DEVICE_ATTR(primary, S_IRUGO | S_IWUSR,
bonding_show_primary, bonding_store_primary);
/*
* Show and set the primary_reselect flag.
*/
static ssize_t bonding_show_primary_reselect(struct device *d,
struct device_attribute *attr,
char *buf)
{
struct bonding *bond = to_bond(d);
return sprintf(buf, "%s %d\n",
pri_reselect_tbl[bond->params.primary_reselect].modename,
bond->params.primary_reselect);
}
static ssize_t bonding_store_primary_reselect(struct device *d,
struct device_attribute *attr,
const char *buf, size_t count)
{
int new_value, ret = count;
struct bonding *bond = to_bond(d);
if (!rtnl_trylock())
return restart_syscall();
new_value = bond_parse_parm(buf, pri_reselect_tbl);
if (new_value < 0) {
pr_err("%s: Ignoring invalid primary_reselect value %.*s.\n",
bond->dev->name,
(int) strlen(buf) - 1, buf);
ret = -EINVAL;
goto out;
}
bond->params.primary_reselect = new_value;
pr_info("%s: setting primary_reselect to %s (%d).\n",
bond->dev->name, pri_reselect_tbl[new_value].modename,
new_value);
read_lock(&bond->lock);
write_lock_bh(&bond->curr_slave_lock);
bond_select_active_slave(bond);
write_unlock_bh(&bond->curr_slave_lock);
read_unlock(&bond->lock);
out:
rtnl_unlock();
return ret;
}
static DEVICE_ATTR(primary_reselect, S_IRUGO | S_IWUSR,
bonding_show_primary_reselect,
bonding_store_primary_reselect);
/*
* Show and set the use_carrier flag.
*/
static ssize_t bonding_show_carrier(struct device *d,
struct device_attribute *attr,
char *buf)
{
struct bonding *bond = to_bond(d);
return sprintf(buf, "%d\n", bond->params.use_carrier);
}
static ssize_t bonding_store_carrier(struct device *d,
struct device_attribute *attr,
const char *buf, size_t count)
{
int new_value, ret = count;
struct bonding *bond = to_bond(d);
if (sscanf(buf, "%d", &new_value) != 1) {
pr_err("%s: no use_carrier value specified.\n",
bond->dev->name);
ret = -EINVAL;
goto out;
}
if ((new_value == 0) || (new_value == 1)) {
bond->params.use_carrier = new_value;
pr_info("%s: Setting use_carrier to %d.\n",
bond->dev->name, new_value);
} else {
pr_info("%s: Ignoring invalid use_carrier value %d.\n",
bond->dev->name, new_value);
}
out:
return count;
}
static DEVICE_ATTR(use_carrier, S_IRUGO | S_IWUSR,
bonding_show_carrier, bonding_store_carrier);
/*
* Show and set currently active_slave.
*/
static ssize_t bonding_show_active_slave(struct device *d,
struct device_attribute *attr,
char *buf)
{
struct slave *curr;
struct bonding *bond = to_bond(d);
int count = 0;
read_lock(&bond->curr_slave_lock);
curr = bond->curr_active_slave;
read_unlock(&bond->curr_slave_lock);
if (USES_PRIMARY(bond->params.mode) && curr)
count = sprintf(buf, "%s\n", curr->dev->name);
return count;
}
static ssize_t bonding_store_active_slave(struct device *d,
struct device_attribute *attr,
const char *buf, size_t count)
{
int i;
struct slave *slave;
struct slave *old_active = NULL;
struct slave *new_active = NULL;
struct bonding *bond = to_bond(d);
if (!rtnl_trylock())
return restart_syscall();
read_lock(&bond->lock);
write_lock_bh(&bond->curr_slave_lock);
if (!USES_PRIMARY(bond->params.mode))
pr_info("%s: Unable to change active slave; %s is in mode %d\n",
bond->dev->name, bond->dev->name, bond->params.mode);
else {
bond_for_each_slave(bond, slave, i) {
if (strnicmp
(slave->dev->name, buf,
strlen(slave->dev->name)) == 0) {
old_active = bond->curr_active_slave;
new_active = slave;
if (new_active == old_active) {
/* do nothing */
pr_info("%s: %s is already the current active slave.\n",
bond->dev->name,
slave->dev->name);
goto out;
}
else {
if ((new_active) &&
(old_active) &&
(new_active->link == BOND_LINK_UP) &&
IS_UP(new_active->dev)) {
pr_info("%s: Setting %s as active slave.\n",
bond->dev->name,
slave->dev->name);
bond_change_active_slave(bond, new_active);
}
else {
pr_info("%s: Could not set %s as active slave; either %s is down or the link is down.\n",
bond->dev->name,
slave->dev->name,
slave->dev->name);
}
goto out;
}
}
}
/* if we got here, then we didn't match the name of any slave */
if (strlen(buf) == 0 || buf[0] == '\n') {
pr_info("%s: Setting active slave to None.\n",
bond->dev->name);
bond->primary_slave = NULL;
bond_select_active_slave(bond);
} else {
pr_info("%s: Unable to set %.*s as active slave as it is not a slave.\n",
bond->dev->name, (int)strlen(buf) - 1, buf);
}
}
out:
write_unlock_bh(&bond->curr_slave_lock);
read_unlock(&bond->lock);
rtnl_unlock();
return count;
}
static DEVICE_ATTR(active_slave, S_IRUGO | S_IWUSR,
bonding_show_active_slave, bonding_store_active_slave);
/*
* Show link status of the bond interface.
*/
static ssize_t bonding_show_mii_status(struct device *d,
struct device_attribute *attr,
char *buf)
{
struct slave *curr;
struct bonding *bond = to_bond(d);
read_lock(&bond->curr_slave_lock);
curr = bond->curr_active_slave;
read_unlock(&bond->curr_slave_lock);
return sprintf(buf, "%s\n", curr ? "up" : "down");
}
static DEVICE_ATTR(mii_status, S_IRUGO, bonding_show_mii_status, NULL);
/*
* Show current 802.3ad aggregator ID.
*/
static ssize_t bonding_show_ad_aggregator(struct device *d,
struct device_attribute *attr,
char *buf)
{
int count = 0;
struct bonding *bond = to_bond(d);
if (bond->params.mode == BOND_MODE_8023AD) {
struct ad_info ad_info;
count = sprintf(buf, "%d\n",
(bond_3ad_get_active_agg_info(bond, &ad_info))
? 0 : ad_info.aggregator_id);
}
return count;
}
static DEVICE_ATTR(ad_aggregator, S_IRUGO, bonding_show_ad_aggregator, NULL);
/*
* Show number of active 802.3ad ports.
*/
static ssize_t bonding_show_ad_num_ports(struct device *d,
struct device_attribute *attr,
char *buf)
{
int count = 0;
struct bonding *bond = to_bond(d);
if (bond->params.mode == BOND_MODE_8023AD) {
struct ad_info ad_info;
count = sprintf(buf, "%d\n",
(bond_3ad_get_active_agg_info(bond, &ad_info))
? 0 : ad_info.ports);
}
return count;
}
static DEVICE_ATTR(ad_num_ports, S_IRUGO, bonding_show_ad_num_ports, NULL);
/*
* Show current 802.3ad actor key.
*/
static ssize_t bonding_show_ad_actor_key(struct device *d,
struct device_attribute *attr,
char *buf)
{
int count = 0;
struct bonding *bond = to_bond(d);
if (bond->params.mode == BOND_MODE_8023AD) {
struct ad_info ad_info;
count = sprintf(buf, "%d\n",
(bond_3ad_get_active_agg_info(bond, &ad_info))
? 0 : ad_info.actor_key);
}
return count;
}
static DEVICE_ATTR(ad_actor_key, S_IRUGO, bonding_show_ad_actor_key, NULL);
/*
* Show current 802.3ad partner key.
*/
static ssize_t bonding_show_ad_partner_key(struct device *d,
struct device_attribute *attr,
char *buf)
{
int count = 0;
struct bonding *bond = to_bond(d);
if (bond->params.mode == BOND_MODE_8023AD) {
struct ad_info ad_info;
count = sprintf(buf, "%d\n",
(bond_3ad_get_active_agg_info(bond, &ad_info))
? 0 : ad_info.partner_key);
}
return count;
}
static DEVICE_ATTR(ad_partner_key, S_IRUGO, bonding_show_ad_partner_key, NULL);
/*
* Show current 802.3ad partner mac.
*/
static ssize_t bonding_show_ad_partner_mac(struct device *d,
struct device_attribute *attr,
char *buf)
{
int count = 0;
struct bonding *bond = to_bond(d);
if (bond->params.mode == BOND_MODE_8023AD) {
struct ad_info ad_info;
if (!bond_3ad_get_active_agg_info(bond, &ad_info))
count = sprintf(buf, "%pM\n", ad_info.partner_system);
}
return count;
}
static DEVICE_ATTR(ad_partner_mac, S_IRUGO, bonding_show_ad_partner_mac, NULL);
/*
* Show the queue_ids of the slaves in the current bond.
*/
static ssize_t bonding_show_queue_id(struct device *d,
struct device_attribute *attr,
char *buf)
{
struct slave *slave;
int i, res = 0;
struct bonding *bond = to_bond(d);
if (!rtnl_trylock())
return restart_syscall();
read_lock(&bond->lock);
bond_for_each_slave(bond, slave, i) {
if (res > (PAGE_SIZE - IFNAMSIZ - 6)) {
/* not enough space for another interface_name:queue_id pair */
if ((PAGE_SIZE - res) > 10)
res = PAGE_SIZE - 10;
res += sprintf(buf + res, "++more++ ");
break;
}
res += sprintf(buf + res, "%s:%d ",
slave->dev->name, slave->queue_id);
}
read_unlock(&bond->lock);
if (res)
buf[res-1] = '\n'; /* eat the leftover space */
rtnl_unlock();
return res;
}
/*
* Set the queue_ids of the slaves in the current bond. The bond
* interface must be enslaved for this to work.
*/
static ssize_t bonding_store_queue_id(struct device *d,
struct device_attribute *attr,
const char *buffer, size_t count)
{
struct slave *slave, *update_slave;
struct bonding *bond = to_bond(d);
u16 qid;
int i, ret = count;
char *delim;
struct net_device *sdev = NULL;
if (!rtnl_trylock())
return restart_syscall();
/* delim will point to queue id if successful */
delim = strchr(buffer, ':');
if (!delim)
goto err_no_cmd;
/*
* Terminate string that points to device name and bump it
* up one, so we can read the queue id there.
*/
*delim = '\0';
if (sscanf(++delim, "%hd\n", &qid) != 1)
goto err_no_cmd;
/* Check buffer length, valid ifname and queue id */
if (strlen(buffer) > IFNAMSIZ ||
!dev_valid_name(buffer) ||
qid > bond->params.tx_queues)
goto err_no_cmd;
/* Get the pointer to that interface if it exists */
sdev = __dev_get_by_name(dev_net(bond->dev), buffer);
if (!sdev)
goto err_no_cmd;
read_lock(&bond->lock);
/* Search for thes slave and check for duplicate qids */
update_slave = NULL;
bond_for_each_slave(bond, slave, i) {
if (sdev == slave->dev)
/*
* We don't need to check the matching
* slave for dups, since we're overwriting it
*/
update_slave = slave;
else if (qid && qid == slave->queue_id) {
goto err_no_cmd_unlock;
}
}
if (!update_slave)
goto err_no_cmd_unlock;
/* Actually set the qids for the slave */
update_slave->queue_id = qid;
read_unlock(&bond->lock);
out:
rtnl_unlock();
return ret;
err_no_cmd_unlock:
read_unlock(&bond->lock);
err_no_cmd:
pr_info("invalid input for queue_id set for %s.\n",
bond->dev->name);
ret = -EPERM;
goto out;
}
static DEVICE_ATTR(queue_id, S_IRUGO | S_IWUSR, bonding_show_queue_id,
bonding_store_queue_id);
/*
* Show and set the all_slaves_active flag.
*/
static ssize_t bonding_show_slaves_active(struct device *d,
struct device_attribute *attr,
char *buf)
{
struct bonding *bond = to_bond(d);
return sprintf(buf, "%d\n", bond->params.all_slaves_active);
}
static ssize_t bonding_store_slaves_active(struct device *d,
struct device_attribute *attr,
const char *buf, size_t count)
{
int i, new_value, ret = count;
struct bonding *bond = to_bond(d);
struct slave *slave;
if (sscanf(buf, "%d", &new_value) != 1) {
pr_err("%s: no all_slaves_active value specified.\n",
bond->dev->name);
ret = -EINVAL;
goto out;
}
if (new_value == bond->params.all_slaves_active)
goto out;
if ((new_value == 0) || (new_value == 1)) {
bond->params.all_slaves_active = new_value;
} else {
pr_info("%s: Ignoring invalid all_slaves_active value %d.\n",
bond->dev->name, new_value);
ret = -EINVAL;
goto out;
}
bond_for_each_slave(bond, slave, i) {
if (slave->state == BOND_STATE_BACKUP) {
if (new_value)
slave->dev->priv_flags &= ~IFF_SLAVE_INACTIVE;
else
slave->dev->priv_flags |= IFF_SLAVE_INACTIVE;
}
}
out:
return count;
}
static DEVICE_ATTR(all_slaves_active, S_IRUGO | S_IWUSR,
bonding_show_slaves_active, bonding_store_slaves_active);
static struct attribute *per_bond_attrs[] = {
&dev_attr_slaves.attr,
&dev_attr_mode.attr,
&dev_attr_fail_over_mac.attr,
&dev_attr_arp_validate.attr,
&dev_attr_arp_interval.attr,
&dev_attr_arp_ip_target.attr,
&dev_attr_downdelay.attr,
&dev_attr_updelay.attr,
&dev_attr_lacp_rate.attr,
&dev_attr_ad_select.attr,
&dev_attr_xmit_hash_policy.attr,
&dev_attr_num_grat_arp.attr,
&dev_attr_num_unsol_na.attr,
&dev_attr_miimon.attr,
&dev_attr_primary.attr,
&dev_attr_primary_reselect.attr,
&dev_attr_use_carrier.attr,
&dev_attr_active_slave.attr,
&dev_attr_mii_status.attr,
&dev_attr_ad_aggregator.attr,
&dev_attr_ad_num_ports.attr,
&dev_attr_ad_actor_key.attr,
&dev_attr_ad_partner_key.attr,
&dev_attr_ad_partner_mac.attr,
&dev_attr_queue_id.attr,
&dev_attr_all_slaves_active.attr,
NULL,
};
static struct attribute_group bonding_group = {
.name = "bonding",
.attrs = per_bond_attrs,
};
/*
* Initialize sysfs. This sets up the bonding_masters file in
* /sys/class/net.
*/
int bond_create_sysfs(void)
{
int ret;
ret = netdev_class_create_file(&class_attr_bonding_masters);
/*
* Permit multiple loads of the module by ignoring failures to
* create the bonding_masters sysfs file. Bonding devices
* created by second or subsequent loads of the module will
* not be listed in, or controllable by, bonding_masters, but
* will have the usual "bonding" sysfs directory.
*
* This is done to preserve backwards compatibility for
* initscripts/sysconfig, which load bonding multiple times to
* configure multiple bonding devices.
*/
if (ret == -EEXIST) {
/* Is someone being kinky and naming a device bonding_master? */
if (__dev_get_by_name(&init_net,
class_attr_bonding_masters.attr.name))
pr_err("network device named %s already exists in sysfs",
class_attr_bonding_masters.attr.name);
ret = 0;
}
return ret;
}
/*
* Remove /sys/class/net/bonding_masters.
*/
void bond_destroy_sysfs(void)
{
netdev_class_remove_file(&class_attr_bonding_masters);
}
/*
* Initialize sysfs for each bond. This sets up and registers
* the 'bondctl' directory for each individual bond under /sys/class/net.
*/
void bond_prepare_sysfs_group(struct bonding *bond)
{
bond->dev->sysfs_groups[0] = &bonding_group;
}
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