From f9f3545e1e5de3d3f5376ae6c522aedb1205f4e1 Mon Sep 17 00:00:00 2001 From: Jiri Pirko Date: Tue, 18 May 2010 05:46:39 +0000 Subject: bonding: make bonding_store_slaves simpler This patch makes bonding_store_slaves function nicer and easier to understand. Signed-off-by: Jiri Pirko Signed-off-by: David S. Miller --- drivers/net/bonding/bond_sysfs.c | 66 +++++++++++++++------------------------- 1 file changed, 25 insertions(+), 41 deletions(-) (limited to 'drivers/net/bonding') diff --git a/drivers/net/bonding/bond_sysfs.c b/drivers/net/bonding/bond_sysfs.c index 79114386e686..a4cbaf78ad1c 100644 --- a/drivers/net/bonding/bond_sysfs.c +++ b/drivers/net/bonding/bond_sysfs.c @@ -211,7 +211,8 @@ static ssize_t bonding_show_slaves(struct device *d, /* * 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(). + * 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, @@ -219,9 +220,8 @@ static ssize_t bonding_store_slaves(struct device *d, { char command[IFNAMSIZ + 1] = { 0, }; char *ifname; - int i, res, ret = count; - struct slave *slave; - struct net_device *dev = NULL; + int res, ret = count; + struct net_device *dev; struct bonding *bond = to_bond(d); /* Quick sanity check -- is the bond interface up? */ @@ -230,8 +230,6 @@ static ssize_t bonding_store_slaves(struct device *d, bond->dev->name); } - /* Note: We can't hold bond->lock here, as bond_create grabs it. */ - if (!rtnl_trylock()) return restart_syscall(); @@ -241,19 +239,17 @@ static ssize_t bonding_store_slaves(struct device *d, !dev_valid_name(ifname)) goto err_no_cmd; - if (command[0] == '+') { - - /* Got a slave name in ifname. */ - - 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; - } + 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; + } - pr_info("%s: Adding slave %s.\n", bond->dev->name, ifname); + switch (command[0]) { + case '+': + pr_info("%s: Adding slave %s.\n", bond->dev->name, dev->name); /* If this is the first slave, then we need to set the master's hardware address to be the same as the @@ -263,33 +259,21 @@ static ssize_t bonding_store_slaves(struct device *d, dev->addr_len); res = bond_enslave(bond->dev, dev); - if (res) - ret = res; + break; - goto out; - } + case '-': + pr_info("%s: Removing slave %s.\n", bond->dev->name, dev->name); + res = bond_release(bond->dev, dev); + break; - if (command[0] == '-') { - dev = NULL; - bond_for_each_slave(bond, slave, i) - if (strnicmp(slave->dev->name, ifname, IFNAMSIZ) == 0) { - dev = slave->dev; - break; - } - if (dev) { - pr_info("%s: Removing slave %s\n", - bond->dev->name, dev->name); - res = bond_release(bond->dev, dev); - if (res) - ret = res; - } else { - pr_err("unable to remove non-existent slave %s for bond %s.\n", - ifname, bond->dev->name); - ret = -ENODEV; - } - goto out; + 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); -- cgit v1.2.3-59-g8ed1b