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linux_old1/drivers/net/bonding/bond_sysfs.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, see <http://www.gnu.org/licenses/>.
*
* 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/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 <linux/reciprocal_div.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 bond_net *bn =
container_of(attr, struct bond_net, class_attr_bonding_masters);
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 bond_net *bn, const char *ifname)
{
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 bond_net *bn =
container_of(attr, struct bond_net, class_attr_bonding_masters);
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(bn->net, ifname);
if (rv) {
if (rv == -EEXIST)
pr_info("%s already exists.\n", ifname);
else
pr_info("%s creation failed.\n", ifname);
res = rv;
}
} else if (command[0] == '-') {
struct net_device *bond_dev;
rtnl_lock();
bond_dev = bond_get_by_name(bn, 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 const struct class_attribute class_attr_bonding_masters = {
.attr = {
.name = "bonding_masters",
.mode = S_IWUSR | S_IRUGO,
},
.show = bonding_show_bonds,
.store = bonding_store_bonds,
};
/*
* Show the slaves in the current bond.
*/
static ssize_t bonding_show_slaves(struct device *d,
struct device_attribute *attr, char *buf)
{
struct bonding *bond = to_bond(d);
struct list_head *iter;
struct slave *slave;
int res = 0;
if (!rtnl_trylock())
return restart_syscall();
bond_for_each_slave(bond, slave, iter) {
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);
}
rtnl_unlock();
if (res)
buf[res-1] = '\n'; /* eat the leftover space */
return res;
}
/*
* Set the slaves in the current bond.
* 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);
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;
struct bonding *bond = to_bond(d);
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);
return -EINVAL;
}
if (!rtnl_trylock())
return restart_syscall();
ret = bond_option_mode_set(bond, new_value);
if (!ret) {
pr_info("%s: setting mode to %s (%d).\n",
bond->dev->name, bond_mode_tbl[new_value].modename,
new_value);
ret = count;
}
rtnl_unlock();
return ret;
}
static DEVICE_ATTR(mode, S_IRUGO | S_IWUSR,
bonding_show_mode, bonding_store_mode);
/*
* Show and set the bonding transmit hash method.
*/
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;
struct bonding *bond = to_bond(d);
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);
return -EINVAL;
}
if (!rtnl_trylock())
return restart_syscall();
ret = bond_option_xmit_hash_policy_set(bond, new_value);
if (!ret)
ret = count;
rtnl_unlock();
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)
{
struct bonding *bond = to_bond(d);
int new_value, ret;
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 (!rtnl_trylock())
return restart_syscall();
ret = bond_option_arp_validate_set(bond, new_value);
if (!ret)
ret = count;
rtnl_unlock();
return ret;
}
static DEVICE_ATTR(arp_validate, S_IRUGO | S_IWUSR, bonding_show_arp_validate,
bonding_store_arp_validate);
/*
* Show and set arp_all_targets.
*/
static ssize_t bonding_show_arp_all_targets(struct device *d,
struct device_attribute *attr,
char *buf)
{
struct bonding *bond = to_bond(d);
int value = bond->params.arp_all_targets;
return sprintf(buf, "%s %d\n", arp_all_targets_tbl[value].modename,
value);
}
static ssize_t bonding_store_arp_all_targets(struct device *d,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct bonding *bond = to_bond(d);
int new_value, ret;
new_value = bond_parse_parm(buf, arp_all_targets_tbl);
if (new_value < 0) {
pr_err("%s: Ignoring invalid arp_all_targets value %s\n",
bond->dev->name, buf);
return -EINVAL;
}
if (!rtnl_trylock())
return restart_syscall();
ret = bond_option_arp_all_targets_set(bond, new_value);
if (!ret)
ret = count;
rtnl_unlock();
return ret;
}
static DEVICE_ATTR(arp_all_targets, S_IRUGO | S_IWUSR,
bonding_show_arp_all_targets, bonding_store_arp_all_targets);
/*
* 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, ret;
struct bonding *bond = to_bond(d);
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;
}
if (!rtnl_trylock())
return restart_syscall();
ret = bond_option_fail_over_mac_set(bond, new_value);
if (!ret)
ret = count;
rtnl_unlock();
return ret;
}
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)
{
struct bonding *bond = to_bond(d);
int new_value, ret;
if (sscanf(buf, "%d", &new_value) != 1) {
pr_err("%s: no arp_interval value specified.\n",
bond->dev->name);
return -EINVAL;
}
if (!rtnl_trylock())
return restart_syscall();
ret = bond_option_arp_interval_set(bond, new_value);
if (!ret)
ret = count;
rtnl_unlock();
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)
{
struct bonding *bond = to_bond(d);
__be32 target;
int ret = -EPERM;
if (!in4_pton(buf + 1, -1, (u8 *)&target, -1, NULL)) {
pr_err("%s: invalid ARP target %pI4 specified\n",
bond->dev->name, &target);
return -EPERM;
}
if (!rtnl_trylock())
return restart_syscall();
if (buf[0] == '+')
ret = bond_option_arp_ip_target_add(bond, target);
else if (buf[0] == '-')
ret = bond_option_arp_ip_target_rem(bond, target);
else
pr_err("no command found in arp_ip_targets file for bond %s. Use +<addr> or -<addr>.\n",
bond->dev->name);
if (!ret)
ret = count;
rtnl_unlock();
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;
struct bonding *bond = to_bond(d);
if (sscanf(buf, "%d", &new_value) != 1) {
pr_err("%s: no down delay value specified.\n", bond->dev->name);
return -EINVAL;
}
if (!rtnl_trylock())
return restart_syscall();
ret = bond_option_downdelay_set(bond, new_value);
if (!ret)
ret = count;
rtnl_unlock();
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;
struct bonding *bond = to_bond(d);
if (sscanf(buf, "%d", &new_value) != 1) {
pr_err("%s: no up delay value specified.\n",
bond->dev->name);
return -EINVAL;
}
if (!rtnl_trylock())
return restart_syscall();
ret = bond_option_updelay_set(bond, new_value);
if (!ret)
ret = count;
rtnl_unlock();
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)
{
struct bonding *bond = to_bond(d);
int new_value, ret = count;
if (!rtnl_trylock())
return restart_syscall();
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;
bond_3ad_update_lacp_rate(bond);
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:
rtnl_unlock();
return ret;
}
static DEVICE_ATTR(lacp_rate, S_IRUGO | S_IWUSR,
bonding_show_lacp, bonding_store_lacp);
static ssize_t bonding_show_min_links(struct device *d,
struct device_attribute *attr,
char *buf)
{
struct bonding *bond = to_bond(d);
return sprintf(buf, "%d\n", bond->params.min_links);
}
static ssize_t bonding_store_min_links(struct device *d,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct bonding *bond = to_bond(d);
int ret;
unsigned int new_value;
ret = kstrtouint(buf, 0, &new_value);
if (ret < 0) {
pr_err("%s: Ignoring invalid min links value %s.\n",
bond->dev->name, buf);
return ret;
}
if (!rtnl_trylock())
return restart_syscall();
ret = bond_option_min_links_set(bond, new_value);
if (!ret)
ret = count;
rtnl_unlock();
return ret;
}
static DEVICE_ATTR(min_links, S_IRUGO | S_IWUSR,
bonding_show_min_links, bonding_store_min_links);
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 peer notifications to send after a failover event.
*/
static ssize_t bonding_show_num_peer_notif(struct device *d,
struct device_attribute *attr,
char *buf)
{
struct bonding *bond = to_bond(d);
return sprintf(buf, "%d\n", bond->params.num_peer_notif);
}
static ssize_t bonding_store_num_peer_notif(struct device *d,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct bonding *bond = to_bond(d);
u8 new_value;
int ret;
ret = kstrtou8(buf, 10, &new_value);
if (!ret) {
pr_err("%s: invalid value %s specified.\n",
bond->dev->name, buf);
return ret;
}
if (!rtnl_trylock())
return restart_syscall();
ret = bond_option_num_peer_notif_set(bond, new_value);
if (!ret)
ret = count;
rtnl_unlock();
return ret;
}
static DEVICE_ATTR(num_grat_arp, S_IRUGO | S_IWUSR,
bonding_show_num_peer_notif, bonding_store_num_peer_notif);
static DEVICE_ATTR(num_unsol_na, S_IRUGO | S_IWUSR,
bonding_show_num_peer_notif, bonding_store_num_peer_notif);
/*
* 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;
struct bonding *bond = to_bond(d);
if (sscanf(buf, "%d", &new_value) != 1) {
pr_err("%s: no miimon value specified.\n",
bond->dev->name);
return -EINVAL;
}
if (!rtnl_trylock())
return restart_syscall();
ret = bond_option_miimon_set(bond, new_value);
if (!ret)
ret = count;
rtnl_unlock();
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)
{
struct bonding *bond = to_bond(d);
char ifname[IFNAMSIZ];
int ret;
sscanf(buf, "%15s", ifname); /* IFNAMSIZ */
if (ifname[0] == '\n')
ifname[0] = '\0';
if (!rtnl_trylock())
return restart_syscall();
ret = bond_option_primary_set(bond, ifname);
if (!ret)
ret = count;
rtnl_unlock();
return ret;
}
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;
struct bonding *bond = to_bond(d);
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);
return -EINVAL;
}
if (!rtnl_trylock())
return restart_syscall();
ret = bond_option_primary_reselect_set(bond, new_value);
if (!ret)
ret = count;
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;
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);
return -EINVAL;
}
if (!rtnl_trylock())
return restart_syscall();
ret = bond_option_use_carrier_set(bond, new_value);
if (!ret)
ret = count;
rtnl_unlock();
return ret;
}
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 bonding *bond = to_bond(d);
struct net_device *slave_dev;
int count = 0;
rcu_read_lock();
slave_dev = bond_option_active_slave_get_rcu(bond);
if (slave_dev)
count = sprintf(buf, "%s\n", slave_dev->name);
rcu_read_unlock();
return count;
}
static ssize_t bonding_store_active_slave(struct device *d,
struct device_attribute *attr,
const char *buf, size_t count)
{
int ret;
struct bonding *bond = to_bond(d);
char ifname[IFNAMSIZ];
struct net_device *dev;
if (!rtnl_trylock())
return restart_syscall();
sscanf(buf, "%15s", ifname); /* IFNAMSIZ */
if (!strlen(ifname) || buf[0] == '\n') {
dev = NULL;
} else {
dev = __dev_get_by_name(dev_net(bond->dev), ifname);
if (!dev) {
ret = -ENODEV;
goto out;
}
}
ret = bond_option_active_slave_set(bond, dev);
if (!ret)
ret = count;
out:
rtnl_unlock();
return ret;
}
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 bonding *bond = to_bond(d);
return sprintf(buf, "%s\n", bond->curr_active_slave ? "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 bonding *bond = to_bond(d);
struct list_head *iter;
struct slave *slave;
int res = 0;
if (!rtnl_trylock())
return restart_syscall();
bond_for_each_slave(bond, slave, iter) {
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);
}
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);
struct list_head *iter;
u16 qid;
int 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->dev->real_num_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;
/* Search for thes slave and check for duplicate qids */
update_slave = NULL;
bond_for_each_slave(bond, slave, iter) {
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;
}
}
if (!update_slave)
goto err_no_cmd;
/* Actually set the qids for the slave */
update_slave->queue_id = qid;
out:
rtnl_unlock();
return ret;
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)
{
struct bonding *bond = to_bond(d);
int new_value, ret;
if (sscanf(buf, "%d", &new_value) != 1) {
pr_err("%s: no all_slaves_active value specified.\n",
bond->dev->name);
return -EINVAL;
}
if (!rtnl_trylock())
return restart_syscall();
ret = bond_option_all_slaves_active_set(bond, new_value);
if (!ret)
ret = count;
rtnl_unlock();
return ret;
}
static DEVICE_ATTR(all_slaves_active, S_IRUGO | S_IWUSR,
bonding_show_slaves_active, bonding_store_slaves_active);
/*
* Show and set the number of IGMP membership reports to send on link failure
*/
static ssize_t bonding_show_resend_igmp(struct device *d,
struct device_attribute *attr,
char *buf)
{
struct bonding *bond = to_bond(d);
return sprintf(buf, "%d\n", bond->params.resend_igmp);
}
static ssize_t bonding_store_resend_igmp(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 resend_igmp value specified.\n",
bond->dev->name);
return -EINVAL;
}
if (!rtnl_trylock())
return restart_syscall();
ret = bond_option_resend_igmp_set(bond, new_value);
if (!ret)
ret = count;
rtnl_unlock();
return ret;
}
static DEVICE_ATTR(resend_igmp, S_IRUGO | S_IWUSR,
bonding_show_resend_igmp, bonding_store_resend_igmp);
static ssize_t bonding_show_lp_interval(struct device *d,
struct device_attribute *attr,
char *buf)
{
struct bonding *bond = to_bond(d);
return sprintf(buf, "%d\n", bond->params.lp_interval);
}
static ssize_t bonding_store_lp_interval(struct device *d,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct bonding *bond = to_bond(d);
int new_value, ret;
if (sscanf(buf, "%d", &new_value) != 1) {
pr_err("%s: no lp interval value specified.\n",
bond->dev->name);
return -EINVAL;
}
if (!rtnl_trylock())
return restart_syscall();
ret = bond_option_lp_interval_set(bond, new_value);
if (!ret)
ret = count;
rtnl_unlock();
return ret;
}
static DEVICE_ATTR(lp_interval, S_IRUGO | S_IWUSR,
bonding_show_lp_interval, bonding_store_lp_interval);
static ssize_t bonding_show_packets_per_slave(struct device *d,
struct device_attribute *attr,
char *buf)
{
struct bonding *bond = to_bond(d);
unsigned int packets_per_slave = bond->params.packets_per_slave;
if (packets_per_slave > 1)
packets_per_slave = reciprocal_value(packets_per_slave);
return sprintf(buf, "%u\n", packets_per_slave);
}
static ssize_t bonding_store_packets_per_slave(struct device *d,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct bonding *bond = to_bond(d);
int new_value, ret = count;
if (sscanf(buf, "%d", &new_value) != 1) {
pr_err("%s: no packets_per_slave value specified.\n",
bond->dev->name);
ret = -EINVAL;
goto out;
}
if (new_value < 0 || new_value > USHRT_MAX) {
pr_err("%s: packets_per_slave must be between 0 and %u\n",
bond->dev->name, USHRT_MAX);
ret = -EINVAL;
goto out;
}
if (bond->params.mode != BOND_MODE_ROUNDROBIN)
pr_warn("%s: Warning: packets_per_slave has effect only in balance-rr mode\n",
bond->dev->name);
if (new_value > 1)
bond->params.packets_per_slave = reciprocal_value(new_value);
else
bond->params.packets_per_slave = new_value;
out:
return ret;
}
static DEVICE_ATTR(packets_per_slave, S_IRUGO | S_IWUSR,
bonding_show_packets_per_slave,
bonding_store_packets_per_slave);
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_all_targets.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,
&dev_attr_resend_igmp.attr,
&dev_attr_min_links.attr,
&dev_attr_lp_interval.attr,
&dev_attr_packets_per_slave.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(struct bond_net *bn)
{
int ret;
bn->class_attr_bonding_masters = class_attr_bonding_masters;
sysfs_attr_init(&bn->class_attr_bonding_masters.attr);
ret = netdev_class_create_file_ns(&bn->class_attr_bonding_masters,
bn->net);
/*
* 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(bn->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(struct bond_net *bn)
{
netdev_class_remove_file_ns(&bn->class_attr_bonding_masters, bn->net);
}
/*
* 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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