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i40iw: Selectively teardown QPs on IP addr change event 

On IP address change event, all connected QPs are torn down
irrespective of whether IP address is involved in a connection.

Only teardown connections those source or destination address
matches the netdev interface IP address being changed, and if
they are on the same VLAN as the netdev.

Fixes: e5e74b61b1 ("i40iw: Add IP addr handling on netdev events")
Signed-off-by: Shiraz Saleem <shiraz.saleem@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
This commit is contained in:
Shiraz Saleem 2017-12-22 09:46:58 -06:00 committed by Jason Gunthorpe
parent 0c5d515546
commit 3020f252c3
3 changed files with 24 additions and 10 deletions
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28
drivers/infiniband/hw/i40iw/i40iw_cm.c
View File

@ -4228,10 +4228,16 @@ set_qhash:
}
/**
* i40iw_cm_disconnect_all - disconnect all connected qp's
* i40iw_cm_teardown_connections - teardown QPs
* @iwdev: device pointer
* @ipaddr: Pointer to IPv4 or IPv6 address
* @ipv4: flag indicating IPv4 when true
* @disconnect_all: flag indicating disconnect all QPs
* teardown QPs where source or destination addr matches ip addr
*/
void i40iw_cm_disconnect_all(struct i40iw_device *iwdev)
void i40iw_cm_teardown_connections(struct i40iw_device *iwdev, u32 *ipaddr,
struct i40iw_cm_info *nfo,
bool disconnect_all)
{
struct i40iw_cm_core *cm_core = &iwdev->cm_core;
struct list_head *list_core_temp;
@ -4245,8 +4251,13 @@ void i40iw_cm_disconnect_all(struct i40iw_device *iwdev)
spin_lock_irqsave(&cm_core->ht_lock, flags);
list_for_each_safe(list_node, list_core_temp, &cm_core->connected_nodes) {
cm_node = container_of(list_node, struct i40iw_cm_node, list);
atomic_inc(&cm_node->ref_count);
list_add(&cm_node->connected_entry, &connected_list);
if (disconnect_all ||
(nfo->vlan_id == cm_node->vlan_id &&
(!memcmp(cm_node->loc_addr, ipaddr, nfo->ipv4 ? 4 : 16) ||
!memcmp(cm_node->rem_addr, ipaddr, nfo->ipv4 ? 4 : 16)))) {
atomic_inc(&cm_node->ref_count);
list_add(&cm_node->connected_entry, &connected_list);
}
}
spin_unlock_irqrestore(&cm_core->ht_lock, flags);
@ -4280,6 +4291,9 @@ void i40iw_if_notify(struct i40iw_device *iwdev, struct net_device *netdev,
enum i40iw_quad_hash_manage_type op =
ifup ? I40IW_QHASH_MANAGE_TYPE_ADD : I40IW_QHASH_MANAGE_TYPE_DELETE;
nfo.vlan_id = vlan_id;
nfo.ipv4 = ipv4;
/* Disable or enable qhash for listeners */
spin_lock_irqsave(&cm_core->listen_list_lock, flags);
list_for_each_entry(listen_node, &cm_core->listen_nodes, list) {
@ -4289,8 +4303,6 @@ void i40iw_if_notify(struct i40iw_device *iwdev, struct net_device *netdev,
memcpy(nfo.loc_addr, listen_node->loc_addr,
sizeof(nfo.loc_addr));
nfo.loc_port = listen_node->loc_port;
nfo.ipv4 = listen_node->ipv4;
nfo.vlan_id = listen_node->vlan_id;
nfo.user_pri = listen_node->user_pri;
if (!list_empty(&listen_node->child_listen_list)) {
i40iw_qhash_ctrl(iwdev,
@ -4312,7 +4324,7 @@ void i40iw_if_notify(struct i40iw_device *iwdev, struct net_device *netdev,
}
spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
/* disconnect any connected qp's on ifdown */
/* teardown connected qp's on ifdown */
if (!ifup)
i40iw_cm_disconnect_all(iwdev);
i40iw_cm_teardown_connections(iwdev, ipaddr, &nfo, false);
}

4
drivers/infiniband/hw/i40iw/i40iw_cm.h
View File

@ -453,5 +453,7 @@ int i40iw_arp_table(struct i40iw_device *iwdev,
void i40iw_if_notify(struct i40iw_device *iwdev, struct net_device *netdev,
u32 *ipaddr, bool ipv4, bool ifup);
void i40iw_cm_disconnect_all(struct i40iw_device *iwdev);
void i40iw_cm_teardown_connections(struct i40iw_device *iwdev, u32 *ipaddr,
struct i40iw_cm_info *nfo,
bool disconnect_all);
#endif /* I40IW_CM_H */

2
drivers/infiniband/hw/i40iw/i40iw_main.c
View File

@ -1800,7 +1800,7 @@ static void i40iw_close(struct i40e_info *ldev, struct i40e_client *client, bool
if (reset)
iwdev->reset = true;
i40iw_cm_disconnect_all(iwdev);
i40iw_cm_teardown_connections(iwdev, NULL, NULL, true);
destroy_workqueue(iwdev->virtchnl_wq);
i40iw_deinit_device(iwdev);
}