diff options
| author | Nikolay Aleksandrov <nikolay@redhat.com> | 2014-09-09 23:17:00 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-09-09 17:31:35 -0700 |
| commit | 059b47e8aaf997245bc531e980581de492315fe6 (patch) | |
| tree | e6f179bf980f970af3e53659b491828570f6616d /drivers/net/bonding/bond_options.c | |
| parent | ecfede424e95b211050f777c3ae96356926ed1c4 (diff) | |
| download | blackbird-obmc-linux-059b47e8aaf997245bc531e980581de492315fe6.tar.gz blackbird-obmc-linux-059b47e8aaf997245bc531e980581de492315fe6.zip | |
bonding: convert primary_slave to use RCU
This is necessary mainly for two bonding call sites: procfs and
sysfs as it was dereferenced without any real protection.
Signed-off-by: Nikolay Aleksandrov <nikolay@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/bonding/bond_options.c')
| -rw-r--r-- | drivers/net/bonding/bond_options.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/net/bonding/bond_options.c b/drivers/net/bonding/bond_options.c index d8dc17faa6b4..7c9e176baecc 100644 --- a/drivers/net/bonding/bond_options.c +++ b/drivers/net/bonding/bond_options.c @@ -1090,7 +1090,7 @@ static int bond_option_primary_set(struct bonding *bond, /* check to see if we are clearing primary */ if (!strlen(primary)) { netdev_info(bond->dev, "Setting primary slave to None\n"); - bond->primary_slave = NULL; + RCU_INIT_POINTER(bond->primary_slave, NULL); memset(bond->params.primary, 0, sizeof(bond->params.primary)); bond_select_active_slave(bond); goto out; @@ -1100,16 +1100,16 @@ static int bond_option_primary_set(struct bonding *bond, if (strncmp(slave->dev->name, primary, IFNAMSIZ) == 0) { netdev_info(bond->dev, "Setting %s as primary slave\n", slave->dev->name); - bond->primary_slave = slave; + rcu_assign_pointer(bond->primary_slave, slave); strcpy(bond->params.primary, slave->dev->name); bond_select_active_slave(bond); goto out; } } - if (bond->primary_slave) { + if (rtnl_dereference(bond->primary_slave)) { netdev_info(bond->dev, "Setting primary slave to None\n"); - bond->primary_slave = NULL; + RCU_INIT_POINTER(bond->primary_slave, NULL); bond_select_active_slave(bond); } strncpy(bond->params.primary, primary, IFNAMSIZ); |
