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bonding: make bonding_store_slaves simpler

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This patch makes bonding_store_slaves function nicer and easier to understand.

Signed-off-by: Jiri Pirko <jpirko@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jiri Pirko 2010-05-18 05:46:39 +00:00 committed by David S. Miller
parent 3dd90905e0
commit f9f3545e1e
1 changed files with 25 additions and 41 deletions
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66
drivers/net/bonding/bond_sysfs.c
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@ -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 * Set the slaves in the current bond. The bond interface must be
* up for this to succeed. * 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, static ssize_t bonding_store_slaves(struct device *d,
struct device_attribute *attr, struct device_attribute *attr,
@ -219,9 +220,8 @@ static ssize_t bonding_store_slaves(struct device *d,
{ {
char command[IFNAMSIZ + 1] = { 0, }; char command[IFNAMSIZ + 1] = { 0, };
char *ifname; char *ifname;
int i, res, ret = count; int res, ret = count;
struct slave *slave; struct net_device *dev;
struct net_device *dev = NULL;
struct bonding *bond = to_bond(d); struct bonding *bond = to_bond(d);
/* Quick sanity check -- is the bond interface up? */ /* Quick sanity check -- is the bond interface up? */
@ -230,8 +230,6 @@ static ssize_t bonding_store_slaves(struct device *d,
bond->dev->name); bond->dev->name);
} }
/* Note: We can't hold bond->lock here, as bond_create grabs it. */
if (!rtnl_trylock()) if (!rtnl_trylock())
return restart_syscall(); return restart_syscall();
@ -241,19 +239,17 @@ static ssize_t bonding_store_slaves(struct device *d,
!dev_valid_name(ifname)) !dev_valid_name(ifname))
goto err_no_cmd; goto err_no_cmd;
if (command[0] == '+') { 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;
}
/* Got a slave name in ifname. */ switch (command[0]) {
case '+':
dev = __dev_get_by_name(dev_net(bond->dev), ifname); pr_info("%s: Adding slave %s.\n", bond->dev->name, dev->name);
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);
/* If this is the first slave, then we need to set /* If this is the first slave, then we need to set
the master's hardware address to be the same as the the master's hardware address to be the same as the
@ -263,32 +259,20 @@ static ssize_t bonding_store_slaves(struct device *d,
dev->addr_len); dev->addr_len);
res = bond_enslave(bond->dev, dev); res = bond_enslave(bond->dev, dev);
if (res) break;
ret = res;
goto out; 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 (command[0] == '-') { if (res)
dev = NULL; ret = res;
bond_for_each_slave(bond, slave, i) goto out;
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;
}
err_no_cmd: err_no_cmd:
pr_err("no command found in slaves file for bond %s. Use +ifname or -ifname.\n", pr_err("no command found in slaves file for bond %s. Use +ifname or -ifname.\n",