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authorYi Zou <yi.zou@intel.com>2010-07-20 15:21:17 -0700
committerJames Bottomley <James.Bottomley@suse.de>2010-07-28 09:06:02 -0500
commit54a5b21da9d4d3f58770da5d1c244db9724659ee (patch)
tree23167b4c07a6b3b1018976d45e808a624e0bce16 /drivers/scsi/fcoe
parent922611569572d3c1aa0ed6491d21583fb3fcca22 (diff)
downloadlinux-54a5b21da9d4d3f58770da5d1c244db9724659ee.tar.bz2
[SCSI] fcoe: fix offload feature flag change from netdev
Currently, when FCoE netdev feature flags are toggled by the LLD, lport's corresponding flags are not updated. This causes the fc_fcp to still try to offload the I/O. This patch adds support of NETDEV_FEAT_CHANGE event in fcoe netdev device notification callback so we can update the lport offload flags appropriately. Signed-off-by: Yi Zou <yi.zou@intel.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Diffstat (limited to 'drivers/scsi/fcoe')
-rw-r--r--drivers/scsi/fcoe/fcoe.c68
1 files changed, 49 insertions, 19 deletions
diff --git a/drivers/scsi/fcoe/fcoe.c b/drivers/scsi/fcoe/fcoe.c
index ab6ea60f2aee..cf9d718c731c 100644
--- a/drivers/scsi/fcoe/fcoe.c
+++ b/drivers/scsi/fcoe/fcoe.c
@@ -589,6 +589,50 @@ static int fcoe_get_wwn(struct net_device *netdev, u64 *wwn, int type)
}
/**
+ * fcoe_netdev_features_change - Updates the lport's offload flags based
+ * on the LLD netdev's FCoE feature flags
+ */
+static void fcoe_netdev_features_change(struct fc_lport *lport,
+ struct net_device *netdev)
+{
+ mutex_lock(&lport->lp_mutex);
+
+ if (netdev->features & NETIF_F_SG)
+ lport->sg_supp = 1;
+ else
+ lport->sg_supp = 0;
+
+ if (netdev->features & NETIF_F_FCOE_CRC) {
+ lport->crc_offload = 1;
+ FCOE_NETDEV_DBG(netdev, "Supports FCCRC offload\n");
+ } else {
+ lport->crc_offload = 0;
+ }
+
+ if (netdev->features & NETIF_F_FSO) {
+ lport->seq_offload = 1;
+ lport->lso_max = netdev->gso_max_size;
+ FCOE_NETDEV_DBG(netdev, "Supports LSO for max len 0x%x\n",
+ lport->lso_max);
+ } else {
+ lport->seq_offload = 0;
+ lport->lso_max = 0;
+ }
+
+ if (netdev->fcoe_ddp_xid) {
+ lport->lro_enabled = 1;
+ lport->lro_xid = netdev->fcoe_ddp_xid;
+ FCOE_NETDEV_DBG(netdev, "Supports LRO for max xid 0x%x\n",
+ lport->lro_xid);
+ } else {
+ lport->lro_enabled = 0;
+ lport->lro_xid = 0;
+ }
+
+ mutex_unlock(&lport->lp_mutex);
+}
+
+/**
* fcoe_netdev_config() - Set up net devive for SW FCoE
* @lport: The local port that is associated with the net device
* @netdev: The associated net device
@@ -624,25 +668,8 @@ static int fcoe_netdev_config(struct fc_lport *lport, struct net_device *netdev)
return -EINVAL;
/* offload features support */
- if (netdev->features & NETIF_F_SG)
- lport->sg_supp = 1;
+ fcoe_netdev_features_change(lport, netdev);
- if (netdev->features & NETIF_F_FCOE_CRC) {
- lport->crc_offload = 1;
- FCOE_NETDEV_DBG(netdev, "Supports FCCRC offload\n");
- }
- if (netdev->features & NETIF_F_FSO) {
- lport->seq_offload = 1;
- lport->lso_max = netdev->gso_max_size;
- FCOE_NETDEV_DBG(netdev, "Supports LSO for max len 0x%x\n",
- lport->lso_max);
- }
- if (netdev->fcoe_ddp_xid) {
- lport->lro_enabled = 1;
- lport->lro_xid = netdev->fcoe_ddp_xid;
- FCOE_NETDEV_DBG(netdev, "Supports LRO for max xid 0x%x\n",
- lport->lro_xid);
- }
skb_queue_head_init(&port->fcoe_pending_queue);
port->fcoe_pending_queue_active = 0;
setup_timer(&port->timer, fcoe_queue_timer, (unsigned long)lport);
@@ -1861,6 +1888,9 @@ static int fcoe_device_notification(struct notifier_block *notifier,
schedule_work(&port->destroy_work);
goto out;
break;
+ case NETDEV_FEAT_CHANGE:
+ fcoe_netdev_features_change(lport, netdev);
+ break;
default:
FCOE_NETDEV_DBG(netdev, "Unknown event %ld "
"from netdev netlink\n", event);
@@ -2056,8 +2086,8 @@ static int fcoe_destroy(const char *buffer, struct kernel_param *kp)
rc = -ENODEV;
goto out_putdev;
}
- list_del(&fcoe->list);
fcoe_interface_cleanup(fcoe);
+ list_del(&fcoe->list);
/* RTNL mutex is dropped by fcoe_if_destroy */
fcoe_if_destroy(fcoe->ctlr.lp);