From 433eba04c2cb53e0bbd2fb6da22d18f725bbf33f Mon Sep 17 00:00:00 2001 From: Vasu Dev Date: Fri, 20 Apr 2012 12:16:27 -0700 Subject: [PATCH] [SCSI] fcoe: remove lport from net device before doing per cpu rx thread cleanup Remove lport from net device and then do synchronize net device to flush inflight rx frames for the lport before doing fcoe_percpu_clean. In case of master lport, remove all rx packet handlers completely and then only do fcoe_percpu_clean. This required splitting fcoe_interface_cleanup to do remove part separately and for that added func fcoe_interface_remove and then call it from fcoe_if_destory before doing fcoe_percpu_clean. However if fcoe_interface_remove() is already called then don't call again from fcoe_interface_cleanup() to preserve its existing flows. This patch along with Neil's other patch to avoid soft irq context on ingress will avoid passing up frames on disabled lport as discussed in this mail thread:- http://lists.open-fcoe.org/pipermail/devel/2012-February/011947.html Signed-off-by: Vasu Dev Acked-by: Neil Horman Tested-by: Ross Brattain Signed-off-by: Robert Love Signed-off-by: James Bottomley --- drivers/scsi/fcoe/fcoe.c | 25 +++++++++++++++++++++---- drivers/scsi/fcoe/fcoe.h | 4 +++- 2 files changed, 24 insertions(+), 5 deletions(-) diff --git a/drivers/scsi/fcoe/fcoe.c b/drivers/scsi/fcoe/fcoe.c index 335e85192807..09a6a26282ac 100644 --- a/drivers/scsi/fcoe/fcoe.c +++ b/drivers/scsi/fcoe/fcoe.c @@ -411,20 +411,18 @@ out: } /** - * fcoe_interface_cleanup() - Clean up a FCoE interface + * fcoe_interface_remove() - remove FCoE interface from netdev * @fcoe: The FCoE interface to be cleaned up * * Caller must be holding the RTNL mutex */ -static void fcoe_interface_cleanup(struct fcoe_interface *fcoe) +static void fcoe_interface_remove(struct fcoe_interface *fcoe) { struct net_device *netdev = fcoe->netdev; struct fcoe_ctlr *fip = &fcoe->ctlr; u8 flogi_maddr[ETH_ALEN]; const struct net_device_ops *ops; - rtnl_lock(); - /* * Don't listen for Ethernet packets anymore. * synchronize_net() ensures that the packet handlers are not running @@ -453,7 +451,22 @@ static void fcoe_interface_cleanup(struct fcoe_interface *fcoe) FCOE_NETDEV_DBG(netdev, "Failed to disable FCoE" " specific feature for LLD.\n"); } + fcoe->removed = 1; +} + + +/** + * fcoe_interface_cleanup() - Clean up a FCoE interface + * @fcoe: The FCoE interface to be cleaned up + */ +static void fcoe_interface_cleanup(struct fcoe_interface *fcoe) +{ + struct net_device *netdev = fcoe->netdev; + struct fcoe_ctlr *fip = &fcoe->ctlr; + rtnl_lock(); + if (!fcoe->removed) + fcoe_interface_remove(fcoe); rtnl_unlock(); /* Release the self-reference taken during fcoe_interface_create() */ @@ -941,6 +954,10 @@ static void fcoe_if_destroy(struct fc_lport *lport) rtnl_lock(); if (!is_zero_ether_addr(port->data_src_addr)) dev_uc_del(netdev, port->data_src_addr); + if (lport->vport) + synchronize_net(); + else + fcoe_interface_remove(fcoe); rtnl_unlock(); /* Free queued packets for the per-CPU receive threads */ diff --git a/drivers/scsi/fcoe/fcoe.h b/drivers/scsi/fcoe/fcoe.h index 3c2733a12aa1..96ac938d39cc 100644 --- a/drivers/scsi/fcoe/fcoe.h +++ b/drivers/scsi/fcoe/fcoe.h @@ -71,7 +71,8 @@ do { \ * @ctlr: The FCoE controller (for FIP) * @oem: The offload exchange manager for all local port * instances associated with this port - * This structure is 1:1 with a net devive. + * @removed: Indicates fcoe interface removed from net device + * This structure is 1:1 with a net device. */ struct fcoe_interface { struct list_head list; @@ -81,6 +82,7 @@ struct fcoe_interface { struct packet_type fip_packet_type; struct fcoe_ctlr ctlr; struct fc_exch_mgr *oem; + u8 removed; }; #define fcoe_from_ctlr(fip) container_of(fip, struct fcoe_interface, ctlr) -- 2.20.1