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path: root/drivers/net/bonding/bond_sysfs.c
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Diffstat (limited to 'drivers/net/bonding/bond_sysfs.c')
-rw-r--r--drivers/net/bonding/bond_sysfs.c66
1 files changed, 30 insertions, 36 deletions
diff --git a/drivers/net/bonding/bond_sysfs.c b/drivers/net/bonding/bond_sysfs.c
index 11b76b35241..90a1f31e8e6 100644
--- a/drivers/net/bonding/bond_sysfs.c
+++ b/drivers/net/bonding/bond_sysfs.c
@@ -109,11 +109,10 @@ static ssize_t bonding_store_bonds(struct class *cls, const char *buffer, size_t
{
char command[IFNAMSIZ + 1] = {0, };
char *ifname;
- int res = count;
+ int rv, res = count;
struct bonding *bond;
struct bonding *nxt;
- down_write(&(bonding_rwsem));
sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
ifname = command + 1;
if ((strlen(command) <= 1) ||
@@ -121,39 +120,28 @@ static ssize_t bonding_store_bonds(struct class *cls, const char *buffer, size_t
goto err_no_cmd;
if (command[0] == '+') {
-
- /* Check to see if the bond already exists. */
- list_for_each_entry_safe(bond, nxt, &bond_dev_list, bond_list)
- if (strnicmp(bond->dev->name, ifname, IFNAMSIZ) == 0) {
- printk(KERN_ERR DRV_NAME
- ": cannot add bond %s; it already exists\n",
- ifname);
- res = -EPERM;
- goto out;
- }
-
printk(KERN_INFO DRV_NAME
": %s is being created...\n", ifname);
- if (bond_create(ifname, &bonding_defaults, &bond)) {
- printk(KERN_INFO DRV_NAME
- ": %s interface already exists. Bond creation failed.\n",
- ifname);
- res = -EPERM;
+ 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) {
- rtnl_lock();
/* 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){
- rtnl_unlock();
printk(KERN_INFO DRV_NAME
": Unable remove bond %s due to open references.\n",
ifname);
@@ -164,6 +152,7 @@ static ssize_t bonding_store_bonds(struct class *cls, const char *buffer, size_t
": %s is being deleted...\n",
bond->dev->name);
bond_destroy(bond);
+ up_write(&bonding_rwsem);
rtnl_unlock();
goto out;
}
@@ -171,6 +160,8 @@ static ssize_t bonding_store_bonds(struct class *cls, const char *buffer, size_t
printk(KERN_ERR DRV_NAME
": unable to delete non-existent bond %s\n", ifname);
res = -ENODEV;
+ up_write(&bonding_rwsem);
+ rtnl_unlock();
goto out;
}
@@ -183,7 +174,6 @@ err_no_cmd:
* get called forever, which is bad.
*/
out:
- up_write(&(bonding_rwsem));
return res;
}
/* class attribute for bond_masters file. This ends up in /sys/class/net */
@@ -271,6 +261,9 @@ static ssize_t bonding_store_slaves(struct device *d,
/* 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) ||
@@ -336,12 +329,10 @@ static ssize_t bonding_store_slaves(struct device *d,
dev->mtu = bond->dev->mtu;
}
}
- rtnl_lock();
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;
- rtnl_unlock();
if (res) {
ret = res;
}
@@ -359,12 +350,10 @@ static ssize_t bonding_store_slaves(struct device *d,
if (dev) {
printk(KERN_INFO DRV_NAME ": %s: Removing slave %s\n",
bond->dev->name, dev->name);
- rtnl_lock();
if (bond->setup_by_slave)
res = bond_release_and_destroy(bond->dev, dev);
else
res = bond_release(bond->dev, dev);
- rtnl_unlock();
if (res) {
ret = res;
goto out;
@@ -389,6 +378,8 @@ err_no_cmd:
ret = -EPERM;
out:
+ up_write(&(bonding_rwsem));
+ rtnl_unlock();
return ret;
}
@@ -423,7 +414,7 @@ static ssize_t bonding_store_mode(struct device *d,
goto out;
}
- new_value = bond_parse_parm((char *)buf, bond_mode_tbl);
+ 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",
@@ -478,7 +469,7 @@ static ssize_t bonding_store_xmit_hash(struct device *d,
goto out;
}
- new_value = bond_parse_parm((char *)buf, xmit_hashtype_tbl);
+ 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",
@@ -518,7 +509,7 @@ static ssize_t bonding_store_arp_validate(struct device *d,
int new_value;
struct bonding *bond = to_bond(d);
- new_value = bond_parse_parm((char *)buf, arp_validate_tbl);
+ 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",
@@ -941,7 +932,7 @@ static ssize_t bonding_store_lacp(struct device *d,
goto out;
}
- new_value = bond_parse_parm((char *)buf, bond_lacp_tbl);
+ new_value = bond_parse_parm(buf, bond_lacp_tbl);
if ((new_value == 1) || (new_value == 0)) {
bond->params.lacp_fast = new_value;
@@ -1075,7 +1066,10 @@ static ssize_t bonding_store_primary(struct device *d,
struct slave *slave;
struct bonding *bond = to_bond(d);
- write_lock_bh(&bond->lock);
+ 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",
@@ -1109,8 +1103,8 @@ static ssize_t bonding_store_primary(struct device *d,
}
}
out:
- write_unlock_bh(&bond->lock);
-
+ write_unlock_bh(&bond->curr_slave_lock);
+ read_unlock(&bond->lock);
rtnl_unlock();
return count;
@@ -1190,7 +1184,8 @@ static ssize_t bonding_store_active_slave(struct device *d,
struct bonding *bond = to_bond(d);
rtnl_lock();
- write_lock_bh(&bond->lock);
+ read_lock(&bond->lock);
+ write_lock_bh(&bond->curr_slave_lock);
if (!USES_PRIMARY(bond->params.mode)) {
printk(KERN_INFO DRV_NAME
@@ -1247,7 +1242,8 @@ static ssize_t bonding_store_active_slave(struct device *d,
}
}
out:
- write_unlock_bh(&bond->lock);
+ write_unlock_bh(&bond->curr_slave_lock);
+ read_unlock(&bond->lock);
rtnl_unlock();
return count;
@@ -1418,8 +1414,6 @@ int bond_create_sysfs(void)
int ret = 0;
struct bonding *firstbond;
- init_rwsem(&bonding_rwsem);
-
/* get the netdev class pointer */
firstbond = container_of(bond_dev_list.next, struct bonding, bond_list);
if (!firstbond)
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-18 22:51:03 +0000