diff options
Diffstat (limited to 'drivers/net/bonding/bond_alb.c')
| -rw-r--r-- | drivers/net/bonding/bond_alb.c | 110 |
1 files changed, 85 insertions, 25 deletions
diff --git a/drivers/net/bonding/bond_alb.c b/drivers/net/bonding/bond_alb.c index aea2217c56e..25b8dbf6cfd 100644 --- a/drivers/net/bonding/bond_alb.c +++ b/drivers/net/bonding/bond_alb.c @@ -128,12 +128,12 @@ static inline u8 _simple_hash(const u8 *hash_start, int hash_size) static inline void _lock_tx_hashtbl(struct bonding *bond) { - spin_lock(&(BOND_ALB_INFO(bond).tx_hashtbl_lock)); + spin_lock_bh(&(BOND_ALB_INFO(bond).tx_hashtbl_lock)); } static inline void _unlock_tx_hashtbl(struct bonding *bond) { - spin_unlock(&(BOND_ALB_INFO(bond).tx_hashtbl_lock)); + spin_unlock_bh(&(BOND_ALB_INFO(bond).tx_hashtbl_lock)); } /* Caller must hold tx_hashtbl lock */ @@ -305,12 +305,12 @@ static struct slave *tlb_choose_channel(struct bonding *bond, u32 hash_index, u3 /*********************** rlb specific functions ***************************/ static inline void _lock_rx_hashtbl(struct bonding *bond) { - spin_lock(&(BOND_ALB_INFO(bond).rx_hashtbl_lock)); + spin_lock_bh(&(BOND_ALB_INFO(bond).rx_hashtbl_lock)); } static inline void _unlock_rx_hashtbl(struct bonding *bond) { - spin_unlock(&(BOND_ALB_INFO(bond).rx_hashtbl_lock)); + spin_unlock_bh(&(BOND_ALB_INFO(bond).rx_hashtbl_lock)); } /* when an ARP REPLY is received from a client update its info @@ -472,13 +472,13 @@ static void rlb_clear_slave(struct bonding *bond, struct slave *slave) _unlock_rx_hashtbl(bond); - write_lock(&bond->curr_slave_lock); + write_lock_bh(&bond->curr_slave_lock); if (slave != bond->curr_active_slave) { rlb_teach_disabled_mac_on_primary(bond, slave->dev->dev_addr); } - write_unlock(&bond->curr_slave_lock); + write_unlock_bh(&bond->curr_slave_lock); } static void rlb_update_client(struct rlb_client_info *client_info) @@ -959,19 +959,34 @@ static int alb_set_slave_mac_addr(struct slave *slave, u8 addr[], int hw) return 0; } -/* Caller must hold bond lock for write or curr_slave_lock for write*/ +/* + * Swap MAC addresses between two slaves. + * + * Called with RTNL held, and no other locks. + * + */ + static void alb_swap_mac_addr(struct bonding *bond, struct slave *slave1, struct slave *slave2) { - struct slave *disabled_slave = NULL; u8 tmp_mac_addr[ETH_ALEN]; - int slaves_state_differ; - - slaves_state_differ = (SLAVE_IS_OK(slave1) != SLAVE_IS_OK(slave2)); memcpy(tmp_mac_addr, slave1->dev->dev_addr, ETH_ALEN); alb_set_slave_mac_addr(slave1, slave2->dev->dev_addr, bond->alb_info.rlb_enabled); alb_set_slave_mac_addr(slave2, tmp_mac_addr, bond->alb_info.rlb_enabled); +} + +/* + * Send learning packets after MAC address swap. + * + * Called with RTNL and bond->lock held for read. + */ +static void alb_fasten_mac_swap(struct bonding *bond, struct slave *slave1, + struct slave *slave2) +{ + int slaves_state_differ = (SLAVE_IS_OK(slave1) != SLAVE_IS_OK(slave2)); + struct slave *disabled_slave = NULL; + /* fasten the change in the switch */ if (SLAVE_IS_OK(slave1)) { alb_send_learning_packets(slave1, slave1->dev->dev_addr); @@ -1044,7 +1059,9 @@ static void alb_change_hw_addr_on_detach(struct bonding *bond, struct slave *sla } if (found) { + /* locking: needs RTNL and nothing else */ alb_swap_mac_addr(bond, slave, tmp_slave); + alb_fasten_mac_swap(bond, slave, tmp_slave); } } } @@ -1375,8 +1392,10 @@ out: return 0; } -void bond_alb_monitor(struct bonding *bond) +void bond_alb_monitor(struct work_struct *work) { + struct bonding *bond = container_of(work, struct bonding, + alb_work.work); struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond)); struct slave *slave; int i; @@ -1436,16 +1455,16 @@ void bond_alb_monitor(struct bonding *bond) /* handle rlb stuff */ if (bond_info->rlb_enabled) { - /* the following code changes the promiscuity of the - * the curr_active_slave. It needs to be locked with a - * write lock to protect from other code that also - * sets the promiscuity. - */ - write_lock_bh(&bond->curr_slave_lock); - if (bond_info->primary_is_promisc && (++bond_info->rlb_promisc_timeout_counter >= RLB_PROMISC_TIMEOUT)) { + /* + * dev_set_promiscuity requires rtnl and + * nothing else. + */ + read_unlock(&bond->lock); + rtnl_lock(); + bond_info->rlb_promisc_timeout_counter = 0; /* If the primary was set to promiscuous mode @@ -1454,9 +1473,10 @@ void bond_alb_monitor(struct bonding *bond) */ dev_set_promiscuity(bond->curr_active_slave->dev, -1); bond_info->primary_is_promisc = 0; - } - write_unlock_bh(&bond->curr_slave_lock); + rtnl_unlock(); + read_lock(&bond->lock); + } if (bond_info->rlb_rebalance) { bond_info->rlb_rebalance = 0; @@ -1479,7 +1499,7 @@ void bond_alb_monitor(struct bonding *bond) } re_arm: - mod_timer(&(bond_info->alb_timer), jiffies + alb_delta_in_ticks); + queue_delayed_work(bond->wq, &bond->alb_work, alb_delta_in_ticks); out: read_unlock(&bond->lock); } @@ -1500,11 +1520,11 @@ int bond_alb_init_slave(struct bonding *bond, struct slave *slave) /* caller must hold the bond lock for write since the mac addresses * are compared and may be swapped. */ - write_lock_bh(&bond->lock); + read_lock(&bond->lock); res = alb_handle_addr_collision_on_attach(bond, slave); - write_unlock_bh(&bond->lock); + read_unlock(&bond->lock); if (res) { return res; @@ -1569,13 +1589,21 @@ void bond_alb_handle_link_change(struct bonding *bond, struct slave *slave, char * Set the bond->curr_active_slave to @new_slave and handle * mac address swapping and promiscuity changes as needed. * - * Caller must hold bond curr_slave_lock for write (or bond lock for write) + * If new_slave is NULL, caller must hold curr_slave_lock or + * bond->lock for write. + * + * If new_slave is not NULL, caller must hold RTNL, bond->lock for + * read and curr_slave_lock for write. Processing here may sleep, so + * no other locks may be held. */ void bond_alb_handle_active_change(struct bonding *bond, struct slave *new_slave) { struct slave *swap_slave; int i; + if (new_slave) + ASSERT_RTNL(); + if (bond->curr_active_slave == new_slave) { return; } @@ -1608,6 +1636,19 @@ void bond_alb_handle_active_change(struct bonding *bond, struct slave *new_slave } } + /* + * Arrange for swap_slave and new_slave to temporarily be + * ignored so we can mess with their MAC addresses without + * fear of interference from transmit activity. + */ + if (swap_slave) { + tlb_clear_slave(bond, swap_slave, 1); + } + tlb_clear_slave(bond, new_slave, 1); + + write_unlock_bh(&bond->curr_slave_lock); + read_unlock(&bond->lock); + /* curr_active_slave must be set before calling alb_swap_mac_addr */ if (swap_slave) { /* swap mac address */ @@ -1616,11 +1657,23 @@ void bond_alb_handle_active_change(struct bonding *bond, struct slave *new_slave /* set the new_slave to the bond mac address */ alb_set_slave_mac_addr(new_slave, bond->dev->dev_addr, bond->alb_info.rlb_enabled); + } + + read_lock(&bond->lock); + + if (swap_slave) { + alb_fasten_mac_swap(bond, swap_slave, new_slave); + } else { /* fasten bond mac on new current slave */ alb_send_learning_packets(new_slave, bond->dev->dev_addr); } + + write_lock_bh(&bond->curr_slave_lock); } +/* + * Called with RTNL + */ int bond_alb_set_mac_address(struct net_device *bond_dev, void *addr) { struct bonding *bond = bond_dev->priv; @@ -1657,8 +1710,12 @@ int bond_alb_set_mac_address(struct net_device *bond_dev, void *addr) } } + write_unlock_bh(&bond->curr_slave_lock); + read_unlock(&bond->lock); + if (swap_slave) { alb_swap_mac_addr(bond, swap_slave, bond->curr_active_slave); + alb_fasten_mac_swap(bond, swap_slave, bond->curr_active_slave); } else { alb_set_slave_mac_addr(bond->curr_active_slave, bond_dev->dev_addr, bond->alb_info.rlb_enabled); @@ -1670,6 +1727,9 @@ int bond_alb_set_mac_address(struct net_device *bond_dev, void *addr) } } + read_lock(&bond->lock); + write_lock_bh(&bond->curr_slave_lock); + return 0; } |