/* * 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. * */ #include <linux/kernel.h> #include <linux/module.h> #include <linux/device.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 <net/net_namespace.h> /* #define BONDING_DEBUG 1 */ #include "bonding.h" #define to_dev(obj) container_of(obj,struct device,kobj) #define to_bond(cd) ((struct bonding *)(to_net_dev(cd)->priv)) /*---------------------------- Declarations -------------------------------*/ extern struct list_head bond_dev_list; extern struct bond_params bonding_defaults; extern struct bond_parm_tbl bond_mode_tbl[]; extern struct bond_parm_tbl bond_lacp_tbl[]; extern struct bond_parm_tbl xmit_hashtype_tbl[]; extern struct bond_parm_tbl arp_validate_tbl[]; static int expected_refcount = -1; static struct class *netdev_class; /*--------------------------- Data Structures -----------------------------*/ /* Bonding sysfs lock. Why can't we just use the subsystem lock? * Because kobject_register tries to acquire the subsystem lock. If * we already hold the lock (which we would if the user was creating * a new bond through the sysfs interface), we deadlock. * This lock is only needed when deleting a bond - we need to make sure * that we don't collide with an ongoing ioctl. */ struct rw_semaphore bonding_rwsem; /*------------------------------ Functions --------------------------------*/ /* * "show" function for the bond_masters attribute. * The class parameter is ignored. */ static ssize_t bonding_show_bonds(struct class *cls, char *buf) { int res = 0; struct bonding *bond; down_read(&(bonding_rwsem)); list_for_each_entry(bond, &bond_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 */ up_read(&(bonding_rwsem)); return res; } /* * "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, const char *buffer, size_t count) { char command[IFNAMSIZ + 1] = {0, }; char *ifname; int rv, res = count; struct bonding *bond; struct bonding *nxt; sscanf(buffer, "%16s", command); /* IFNAMSIZ*/ ifname = command + 1; if ((strlen(command) <= 1) || !dev_valid_name(ifname)) goto err_no_cmd; if (command[0] == '+') { printk(KERN_INFO DRV_NAME ": %s is being created...\n", ifname); rv = bond_create(ifname, &bonding_defaults, &bond); if (rv) { printk(KERN_INFO DRV_NAME ": Bond creation failed.\n"); res = rv; } goto out; } if (command[0] == '-') { rtnl_lock(); down_write(&bonding_rwsem); list_for_each_entry_safe(bond, nxt, &bond_dev_list, bond_list) if (strnicmp(bond->dev->name, ifname, IFNAMSIZ) == 0) { /* check the ref count on the bond's kobject. * If it's > expected, then there's a file open, * and we have to fail. */ if (atomic_read(&bond->dev->dev.kobj.kref.refcount) > expected_refcount){ printk(KERN_INFO DRV_NAME ": Unable remove bond %s due to open references.\n", ifname); res = -EPERM; goto out; } printk(KERN_INFO DRV_NAME ": %s is being deleted...\n", bond->dev->name); bond_destroy(bond); up_write(&bonding_rwsem); rtnl_unlock(); goto out; } printk(KERN_ERR DRV_NAME ": unable to delete non-existent bond %s\n", ifname); res = -ENODEV; up_write(&bonding_rwsem); rtnl_unlock(); goto out; } err_no_cmd: printk(KERN_ERR DRV_NAME ": no command found in bonding_masters. Use +ifname or -ifname.\n"); res = -EPERM; /* Always return either count or an error. If you return 0, you'll * get called forever, which is bad. */ out: return res; } /* 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 function is largely the same flow as bonding_update_bonds(). */ 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 i, res, found, ret = count; u32 original_mtu; struct slave *slave; struct net_device *dev = NULL; struct bonding *bond = to_bond(d); /* Quick sanity check -- is the bond interface up? */ if (!(bond->dev->flags & IFF_UP)) { printk(KERN_WARNING DRV_NAME ": %s: doing slave updates when interface is down.\n", bond->dev->name); } /* Note: We can't hold bond->lock here, as bond_create grabs it. */ rtnl_lock(); down_write(&(bonding_rwsem)); sscanf(buffer, "%16s", command); /* IFNAMSIZ*/ ifname = command + 1; if ((strlen(command) <= 1) || !dev_valid_name(ifname)) goto err_no_cmd; if (command[0] == '+') { /* Got a slave name in ifname. Is it already in the list? */ found = 0; read_lock(&bond->lock); bond_for_each_slave(bond, slave, i) if (strnicmp(slave->dev->name, ifname, IFNAMSIZ) == 0) { printk(KERN_ERR DRV_NAME ": %s: Interface %s is already enslaved!\n", bond->dev->name, ifname); ret = -EPERM; read_unlock(&bond->lock); goto out; } read_unlock(&bond->lock); printk(KERN_INFO DRV_NAME ": %s: Adding slave %s.\n", bond->dev->name, ifname); dev = dev_get_by_name(&init_net, ifname); if (!dev) { printk(KERN_INFO DRV_NAME ": %s: Interface %s does not exist!\n", bond->dev->name, ifname); ret = -EPERM; goto out; } else dev_put(dev); if (dev->flags & IFF_UP) { printk(KERN_ERR DRV_NAME ": %s: Error: Unable to enslave %s " "because it is already up.\n", bond->dev->name, dev->name); ret = -EPERM; goto out; } /* If this is the first slave, then we need to set the master's hardware address to be the same as the slave's. */ if (!(*((u32 *) & (bond->dev->dev_addr[0])))) { memcpy(bond->dev->dev_addr, dev->dev_addr, dev->addr_len); } /* Set the slave's MTU to match the bond */ original_mtu = dev->mtu; if (dev->mtu != bond->dev->mtu) { if (dev->change_mtu) { res = dev->change_mtu(dev, bond->dev->mtu); if (res) { ret = res; goto out; } } else { dev->mtu = bond->dev->mtu; } } res = bond_enslave(bond->dev, dev); bond_for_each_slave(bond, slave, i) if (strnicmp(slave->dev->name, ifname, IFNAMSIZ) == 0) slave->original_mtu = original_mtu; if (res) { ret = res; } goto out; } if (command[0] == '-') { dev = NULL; bond_for_each_slave(bond, slave, i) if (strnicmp(slave->dev->name, ifname, IFNAMSIZ) == 0) { dev = slave->dev; original_mtu = slave->original_mtu; break; } if (dev) { printk(KERN_INFO DRV_NAME ": %s: Removing slave %s\n", bond->dev->name, dev->name); if (bond->setup_by_slave) res = bond_release_and_destroy(bond->dev, dev); else res = bond_release(bond->dev, dev); if (res) { ret = res; goto out; } /* set the slave MTU to the default */ if (dev->change_mtu) { dev->change_mtu(dev, original_mtu); } else { dev->mtu = original_mtu; } } else { printk(KERN_ERR DRV_NAME ": unable to remove non-existent slave %s for bond %s.\n", ifname, bond->dev->name); ret = -ENODEV; } goto out; } err_no_cmd: printk(KERN_ERR DRV_NAME ": no command found in slaves file for bond %s. Use +ifname or -ifname.\n", bond->dev->name); ret = -EPERM; out: up_write(&(bonding_rwsem)); 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) { printk(KERN_ERR DRV_NAME ": 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) { printk(KERN_ERR DRV_NAME ": %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); printk(KERN_INFO DRV_NAME ": %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) { printk(KERN_ERR DRV_NAME "%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) { printk(KERN_ERR DRV_NAME ": %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); printk(KERN_INFO DRV_NAME ": %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) { printk(KERN_ERR DRV_NAME ": %s: Ignoring invalid arp_validate value %s\n", bond->dev->name, buf); return -EINVAL; } if (new_value && (bond->params.mode != BOND_MODE_ACTIVEBACKUP)) { printk(KERN_ERR DRV_NAME ": %s: arp_validate only supported in active-backup mode.\n", bond->dev->name); return -EINVAL; } printk(KERN_INFO DRV_NAME ": %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, "%d\n", bond->params.fail_over_mac) + 1; } static ssize_t bonding_store_fail_over_mac(struct device *d, struct device_attribute *attr, const char *buf, size_t count) { int new_value; int ret = count; struct bonding *bond = to_bond(d); if (bond->slave_cnt != 0) { printk(KERN_ERR DRV_NAME ": %s: Can't alter fail_over_mac with slaves in bond.\n", bond->dev->name); ret = -EPERM; goto out; } if (sscanf(buf, "%d", &new_value) != 1) { printk(KERN_ERR DRV_NAME ": %s: no fail_over_mac value specified.\n", bond->dev->name); ret = -EINVAL; goto out; } if ((new_value == 0) || (new_value == 1)) { bond->params.fail_over_mac = new_value; printk(KERN_INFO DRV_NAME ": %s: Setting fail_over_mac to %d.\n", bond->dev->name, new_value); } else { printk(KERN_INFO DRV_NAME ": %s: Ignoring invalid fail_over_mac value %d.\n", bond->dev->name, new_value); } out: 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) { int new_value, ret = count; struct bonding *bond = to_bond(d); if (sscanf(buf, "%d", &new_value) != 1) { printk(KERN_ERR DRV_NAME ": %s: no arp_interval value specified.\n", bond->dev->name); ret = -EINVAL; goto out; } if (new_value < 0) { printk(KERN_ERR DRV_NAME ": %s: Invalid arp_interval value %d not in range 1-%d; rejected.\n", bond->dev->name, new_value, INT_MAX); ret = -EINVAL; goto out; } printk(KERN_INFO DRV_NAME ": %s: Setting ARP monitoring interval to %d.\n", bond->dev->name, new_value); bond->params.arp_interval = new_value; if (bond->params.miimon) { printk(KERN_INFO DRV_NAME ": %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]) { printk(KERN_INFO DRV_NAME ": %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, "%u.%u.%u.%u ", NIPQUAD(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))) { printk(KERN_ERR DRV_NAME ": %s: invalid ARP target %u.%u.%u.%u specified for addition\n", bond->dev->name, NIPQUAD(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); i++) { if (targets[i] == newtarget) { /* duplicate */ printk(KERN_ERR DRV_NAME ": %s: ARP target %u.%u.%u.%u is already present\n", bond->dev->name, NIPQUAD(newtarget)); if (done) targets[i] = 0; ret = -EINVAL; goto out; } if (targets[i] == 0 && !done) { printk(KERN_INFO DRV_NAME ": %s: adding ARP target %d.%d.%d.%d.\n", bond->dev->name, NIPQUAD(newtarget)); done = 1; targets[i] = newtarget; } } if (!done) { printk(KERN_ERR DRV_NAME ": %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))) { printk(KERN_ERR DRV_NAME ": %s: invalid ARP target %d.%d.%d.%d specified for removal\n", bond->dev->name, NIPQUAD(newtarget)); ret = -EINVAL; goto out; } for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) { if (targets[i] == newtarget) { printk(KERN_INFO DRV_NAME ": %s: removing ARP target %d.%d.%d.%d.\n", bond->dev->name, NIPQUAD(newtarget)); targets[i] = 0; done = 1; } } if (!done) { printk(KERN_INFO DRV_NAME ": %s: unable to remove nonexistent ARP target %d.%d.%d.%d.\n", bond->dev->name, NIPQUAD(newtarget)); ret = -EINVAL; goto out; } } else { printk(KERN_ERR DRV_NAME ": 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)) { printk(KERN_ERR DRV_NAME ": %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) { printk(KERN_ERR DRV_NAME ": %s: no down delay value specified.\n", bond->dev->name); ret = -EINVAL; goto out; } if (new_value < 0) { printk(KERN_ERR DRV_NAME ": %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) { printk(KERN_WARNING DRV_NAME ": %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; printk(KERN_INFO DRV_NAME ": %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)) { printk(KERN_ERR DRV_NAME ": %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) { printk(KERN_ERR DRV_NAME ": %s: no up delay value specified.\n", bond->dev->name); ret = -EINVAL; goto out; } if (new_value < 0) { printk(KERN_ERR DRV_NAME ": %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) { printk(KERN_WARNING DRV_NAME ": %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; printk(KERN_INFO DRV_NAME ": %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) { printk(KERN_ERR DRV_NAME ": %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) { printk(KERN_ERR DRV_NAME ": %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; printk(KERN_INFO DRV_NAME ": %s: Setting LACP rate to %s (%d).\n", bond->dev->name, bond_lacp_tbl[new_value].modename, new_value); } else { printk(KERN_ERR DRV_NAME ": %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); /* * 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) { printk(KERN_ERR DRV_NAME ": %s: no miimon value specified.\n", bond->dev->name); ret = -EINVAL; goto out; } if (new_value < 0) { printk(KERN_ERR DRV_NAME ": %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 { printk(KERN_INFO DRV_NAME ": %s: Setting MII monitoring interval to %d.\n", bond->dev->name, new_value); bond->params.miimon = new_value; if(bond->params.updelay) printk(KERN_INFO DRV_NAME ": %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) printk(KERN_INFO DRV_NAME ": %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) { printk(KERN_INFO DRV_NAME ": %s: MII monitoring cannot be used with " "ARP monitoring. Disabling ARP monitoring...\n", bond->dev->name); bond->params.arp_interval = 0; 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); rtnl_lock(); read_lock(&bond->lock); write_lock_bh(&bond->curr_slave_lock); if (!USES_PRIMARY(bond->params.mode)) { printk(KERN_INFO DRV_NAME ": %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) { printk(KERN_INFO DRV_NAME ": %s: Setting %s as primary slave.\n", bond->dev->name, slave->dev->name); bond->primary_slave = slave; 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') { printk(KERN_INFO DRV_NAME ": %s: Setting primary slave to None.\n", bond->dev->name); bond->primary_slave = NULL; bond_select_active_slave(bond); } else { printk(KERN_INFO DRV_NAME ": %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 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) { printk(KERN_ERR DRV_NAME ": %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; printk(KERN_INFO DRV_NAME ": %s: Setting use_carrier to %d.\n", bond->dev->name, new_value); } else { printk(KERN_INFO DRV_NAME ": %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); rtnl_lock(); read_lock(&bond->lock); write_lock_bh(&bond->curr_slave_lock); if (!USES_PRIMARY(bond->params.mode)) { printk(KERN_INFO DRV_NAME ": %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 */ printk(KERN_INFO DRV_NAME ": %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)) { printk(KERN_INFO DRV_NAME ": %s: Setting %s as active slave.\n", bond->dev->name, slave->dev->name); bond_change_active_slave(bond, new_active); } else { printk(KERN_INFO DRV_NAME ": %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') { printk(KERN_INFO DRV_NAME ": %s: Setting active slave to None.\n", bond->dev->name); bond->primary_slave = NULL; bond_select_active_slave(bond); } else { printk(KERN_INFO DRV_NAME ": %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); DECLARE_MAC_BUF(mac); 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,"%s\n", print_mac(mac, ad_info.partner_system)); } } return count; } static DEVICE_ATTR(ad_partner_mac, S_IRUGO, bonding_show_ad_partner_mac, NULL); 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_xmit_hash_policy.attr, &dev_attr_miimon.attr, &dev_attr_primary.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, 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 = 0; struct bonding *firstbond; /* get the netdev class pointer */ firstbond = container_of(bond_dev_list.next, struct bonding, bond_list); if (!firstbond) return -ENODEV; netdev_class = firstbond->dev->dev.class; if (!netdev_class) return -ENODEV; ret = class_create_file(netdev_class, &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) { netdev_class = NULL; return 0; } return ret; } /* * Remove /sys/class/net/bonding_masters. */ void bond_destroy_sysfs(void) { if (netdev_class) class_remove_file(netdev_class, &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. */ int bond_create_sysfs_entry(struct bonding *bond) { struct net_device *dev = bond->dev; int err; err = sysfs_create_group(&(dev->dev.kobj), &bonding_group); if (err) { printk(KERN_EMERG "eek! didn't create group!\n"); } if (expected_refcount < 1) expected_refcount = atomic_read(&bond->dev->dev.kobj.kref.refcount); return err; } /* * Remove sysfs entries for each bond. */ void bond_destroy_sysfs_entry(struct bonding *bond) { struct net_device *dev = bond->dev; sysfs_remove_group(&(dev->dev.kobj), &bonding_group); }