Currently, the parent interface keeps sending broadcast group join
requests even if p_key index 0 is invalid, which for itself is
possible/common in virtualized environment where a VF has been probed to
VM but the actual p_key configuration has not yet been assigned by the
management software. This creates unnecessary noise on the fabric and in
the kernel logs:
ib0: multicast join failed for ff12:401b:8000:0000:0000:0000:ffff:ffff,
status -22
The original code run the multicast task regardless of the actual
p_key value, which can be avoided. The fix is to re-init resources and
bring interface up only if p_key index 0 is valid either when starting
up or on PKEY_CHANGE event.
Fixes: c290414169 ('IPoIB: Fix pkey change flow for virtualization
environments')
Reviewed-by: Ira Weiny <ira.we...@intel.com>
Signed-off-by: Alex Estrin <alex.est...@intel.com>
---
Changes from v4:
- streamline child interface pkey event handling,
- shutdown of pkey polling thread depends on PKEY_STOP flag state only.
Original poib_ib_dev_down() could leave polling thread active
if PKEY_ASSIGNED flag was set. That could create a racing condition on followed
re-initialization of QP resources.
---
drivers/infiniband/ulp/ipoib/ipoib_ib.c | 59 +++++++++++++++----------------
1 files changed, 29 insertions(+), 30 deletions(-)
diff --git a/drivers/infiniband/ulp/ipoib/ipoib_ib.c
b/drivers/infiniband/ulp/ipoib/ipoib_ib.c
index 6a7003d..ac941e1 100644
--- a/drivers/infiniband/ulp/ipoib/ipoib_ib.c
+++ b/drivers/infiniband/ulp/ipoib/ipoib_ib.c
@@ -52,6 +52,7 @@ MODULE_PARM_DESC(data_debug_level,
#endif
static DEFINE_MUTEX(pkey_mutex);
+static void ipoib_pkey_dev_check_presence(struct net_device *dev);
struct ipoib_ah *ipoib_create_ah(struct net_device *dev,
struct ib_pd *pd, struct ib_ah_attr *attr)
@@ -669,12 +670,13 @@ int ipoib_ib_dev_open(struct net_device *dev)
struct ipoib_dev_priv *priv = netdev_priv(dev);
int ret;
- if (ib_find_pkey(priv->ca, priv->port, priv->pkey, &priv->pkey_index)) {
- ipoib_warn(priv, "P_Key 0x%04x not found\n", priv->pkey);
- clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
+ ipoib_pkey_dev_check_presence(dev);
+
+ if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) {
+ ipoib_warn(priv, "P_Key 0x%04x is %s\n", priv->pkey,
+ !(priv->pkey & 0x7fff) ? "Invalid" : "not found");
return -1;
}
- set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
ret = ipoib_init_qp(dev);
if (ret) {
@@ -712,9 +714,10 @@ dev_stop:
static void ipoib_pkey_dev_check_presence(struct net_device *dev)
{
struct ipoib_dev_priv *priv = netdev_priv(dev);
- u16 pkey_index = 0;
- if (ib_find_pkey(priv->ca, priv->port, priv->pkey, &pkey_index))
+ if (!(priv->pkey & 0x7fff) ||
+ ib_find_pkey(priv->ca, priv->port, priv->pkey,
+ &priv->pkey_index))
clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
else
set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
@@ -746,12 +749,10 @@ int ipoib_ib_dev_down(struct net_device *dev, int flush)
netif_carrier_off(dev);
/* Shutdown the P_Key thread if still active */
- if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) {
- mutex_lock(&pkey_mutex);
- set_bit(IPOIB_PKEY_STOP, &priv->flags);
+ mutex_lock(&pkey_mutex);
+ if (!test_and_set_bit(IPOIB_PKEY_STOP, &priv->flags))
cancel_delayed_work_sync(&priv->pkey_poll_task);
- mutex_unlock(&pkey_mutex);
- }
+ mutex_unlock(&pkey_mutex);
ipoib_mcast_stop_thread(dev, flush);
ipoib_mcast_dev_flush(dev);
@@ -972,7 +973,7 @@ static void __ipoib_ib_dev_flush(struct ipoib_dev_priv
*priv,
{
struct ipoib_dev_priv *cpriv;
struct net_device *dev = priv->dev;
- u16 new_index;
+ u16 old_index;
int result;
down_read(&priv->vlan_rwsem);
@@ -986,16 +987,17 @@ static void __ipoib_ib_dev_flush(struct ipoib_dev_priv
*priv,
up_read(&priv->vlan_rwsem);
- if (!test_bit(IPOIB_FLAG_INITIALIZED, &priv->flags)) {
- /* for non-child devices must check/update the pkey value here
*/
- if (level == IPOIB_FLUSH_HEAVY &&
- !test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags))
- update_parent_pkey(priv);
+ if (!test_bit(IPOIB_FLAG_INITIALIZED, &priv->flags) &&
+ level != IPOIB_FLUSH_HEAVY) {
ipoib_dbg(priv, "Not flushing - IPOIB_FLAG_INITIALIZED not
set.\n");
return;
}
if (!test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) {
+ /* interface is down. update pkey and leave. */
+ if (level == IPOIB_FLUSH_HEAVY &&
+ !test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags))
+ update_parent_pkey(priv);
ipoib_dbg(priv, "Not flushing - IPOIB_FLAG_ADMIN_UP not
set.\n");
return;
}
@@ -1005,20 +1007,15 @@ static void __ipoib_ib_dev_flush(struct ipoib_dev_priv
*priv,
* (parent) devices should always takes what present in pkey
index 0
*/
if (test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) {
- if (ib_find_pkey(priv->ca, priv->port, priv->pkey,
&new_index)) {
- clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
- ipoib_ib_dev_down(dev, 0);
- ipoib_ib_dev_stop(dev, 0);
- if (ipoib_pkey_dev_delay_open(dev))
- return;
- }
- /* restart QP only if P_Key index is changed */
- if (test_and_set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)
&&
- new_index == priv->pkey_index) {
+ old_index = priv->pkey_index;
+ ipoib_pkey_dev_check_presence(dev);
+
+ if (test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags) &&
+ old_index == priv->pkey_index) {
+ /* restart QP only if P_Key index is changed */
ipoib_dbg(priv, "Not flushing - P_Key index not
changed.\n");
return;
}
- priv->pkey_index = new_index;
} else {
result = update_parent_pkey(priv);
/* restart QP only if P_Key value changed */
@@ -1038,8 +1035,10 @@ static void __ipoib_ib_dev_flush(struct ipoib_dev_priv
*priv,
ipoib_ib_dev_down(dev, 0);
if (level == IPOIB_FLUSH_HEAVY) {
- ipoib_ib_dev_stop(dev, 0);
- ipoib_ib_dev_open(dev);
+ if (test_bit(IPOIB_FLAG_INITIALIZED, &priv->flags))
+ ipoib_ib_dev_stop(dev, 0);
+ if (ipoib_ib_dev_open(dev) != 0)
+ return;
}
/*
--
To unsubscribe from this list: send the line "unsubscribe linux-rdma" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
