From: Jiri Pirko Date: Fri, 18 Oct 2013 15:43:35 +0000 (+0200) Subject: bonding: move active_slave setting into separate function X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=d9e32b21cb394c0816f206539b8c7e9c023db332;p=linux-beck.git bonding: move active_slave setting into separate function Do a bit of refactoring on the way. Signed-off-by: Jiri Pirko Signed-off-by: David S. Miller --- diff --git a/drivers/net/bonding/bond_options.c b/drivers/net/bonding/bond_options.c index 294b7660b054..09af5d10d43a 100644 --- a/drivers/net/bonding/bond_options.c +++ b/drivers/net/bonding/bond_options.c @@ -12,6 +12,9 @@ #include #include +#include +#include +#include #include "bonding.h" static bool bond_mode_is_valid(int mode) @@ -53,3 +56,69 @@ int bond_option_mode_set(struct bonding *bond, int mode) bond->params.mode = mode; return 0; } + +int bond_option_active_slave_set(struct bonding *bond, + struct net_device *slave_dev) +{ + int ret = 0; + + if (slave_dev) { + if (!netif_is_bond_slave(slave_dev)) { + pr_err("Device %s is not bonding slave.\n", + slave_dev->name); + return -EINVAL; + } + + if (bond->dev != netdev_master_upper_dev_get(slave_dev)) { + pr_err("%s: Device %s is not our slave.\n", + bond->dev->name, slave_dev->name); + return -EINVAL; + } + } + + if (!USES_PRIMARY(bond->params.mode)) { + pr_err("%s: Unable to change active slave; %s is in mode %d\n", + bond->dev->name, bond->dev->name, bond->params.mode); + return -EINVAL; + } + + block_netpoll_tx(); + read_lock(&bond->lock); + write_lock_bh(&bond->curr_slave_lock); + + /* check to see if we are clearing active */ + if (!slave_dev) { + pr_info("%s: Clearing current active slave.\n", + bond->dev->name); + rcu_assign_pointer(bond->curr_active_slave, NULL); + bond_select_active_slave(bond); + } else { + struct slave *old_active = bond->curr_active_slave; + struct slave *new_active = bond_slave_get_rtnl(slave_dev); + + BUG_ON(!new_active); + + if (new_active == old_active) { + /* do nothing */ + pr_info("%s: %s is already the current active slave.\n", + bond->dev->name, new_active->dev->name); + } else { + if (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, new_active->dev->name); + bond_change_active_slave(bond, new_active); + } else { + pr_err("%s: Could not set %s as active slave; either %s is down or the link is down.\n", + bond->dev->name, new_active->dev->name, + new_active->dev->name); + ret = -EINVAL; + } + } + } + + write_unlock_bh(&bond->curr_slave_lock); + read_unlock(&bond->lock); + unblock_netpoll_tx(); + return ret; +} diff --git a/drivers/net/bonding/bond_sysfs.c b/drivers/net/bonding/bond_sysfs.c index c234cec10e05..abd260047103 100644 --- a/drivers/net/bonding/bond_sysfs.c +++ b/drivers/net/bonding/bond_sysfs.c @@ -1235,81 +1235,33 @@ static ssize_t bonding_store_active_slave(struct device *d, struct device_attribute *attr, const char *buf, size_t count) { - struct slave *slave, *old_active, *new_active; + int ret; struct bonding *bond = to_bond(d); - struct list_head *iter; char ifname[IFNAMSIZ]; + struct net_device *dev; if (!rtnl_trylock()) return restart_syscall(); - old_active = new_active = NULL; - block_netpoll_tx(); - 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); - goto out; - } - sscanf(buf, "%15s", ifname); /* IFNAMSIZ */ - - /* check to see if we are clearing active */ if (!strlen(ifname) || buf[0] == '\n') { - pr_info("%s: Clearing current active slave.\n", - bond->dev->name); - rcu_assign_pointer(bond->curr_active_slave, NULL); - bond_select_active_slave(bond); - goto out; - } - - bond_for_each_slave(bond, slave, iter) { - if (strncmp(slave->dev->name, ifname, IFNAMSIZ) == 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; - } + dev = NULL; + } else { + dev = __dev_get_by_name(dev_net(bond->dev), ifname); + if (!dev) { + ret = -ENODEV; + goto out; } } - pr_info("%s: Unable to set %.*s as active slave.\n", - bond->dev->name, (int)strlen(buf) - 1, buf); - out: - write_unlock_bh(&bond->curr_slave_lock); - read_unlock(&bond->lock); - unblock_netpoll_tx(); + ret = bond_option_active_slave_set(bond, dev); + if (!ret) + ret = count; + out: rtnl_unlock(); - return count; + return ret; } static DEVICE_ATTR(active_slave, S_IRUGO | S_IWUSR, diff --git a/drivers/net/bonding/bonding.h b/drivers/net/bonding/bonding.h index 7446849a20c4..686759dce4c6 100644 --- a/drivers/net/bonding/bonding.h +++ b/drivers/net/bonding/bonding.h @@ -427,6 +427,7 @@ unsigned int bond_get_num_tx_queues(void); int bond_netlink_init(void); void bond_netlink_fini(void); int bond_option_mode_set(struct bonding *bond, int mode); +int bond_option_active_slave_set(struct bonding *bond, struct net_device *slave_dev); struct bond_net { struct net * net; /* Associated network namespace */