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[SCSI] fcoe: have fcoe log off and lport destroy before ndo_fcoe_disable

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Currently fcoe interface cleanup is done after ndo_fcoe_disable
and that prevents logoff going out to the peer, so this patch
moves all netdev cleanup and its releasing inside
fcoe_interface_cleanup to have log off before ndo_fcoe_disable
disables the fcoe.

This patch also fixes asymmetric rtnl locking around fcoe_if_destroy,
as currently this function requires rtnl held by its caller
and then have this func drops the lock, instead now don't have
any processing under rtnl inside fcoe_if_destroy, this required
moving few func to get build working again.

Signed-off-by: Vasu Dev <vasu.dev@intel.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
This commit is contained in:
Vasu Dev 2011-04-01 16:06:45 -07:00 committed by James Bottomley
parent f2817ec2e0
commit f04ca1b654
1 changed files with 67 additions and 78 deletions
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145
drivers/scsi/fcoe/fcoe.c
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@ -380,49 +380,6 @@ static struct fcoe_interface *fcoe_interface_create(struct net_device *netdev,
return fcoe;
}
/**
* fcoe_interface_cleanup() - Clean up a FCoE interface
* @fcoe: The FCoE interface to be cleaned up
*
* Caller must be holding the RTNL mutex
*/
void fcoe_interface_cleanup(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;
/*
* Don't listen for Ethernet packets anymore.
* synchronize_net() ensures that the packet handlers are not running
* on another CPU. dev_remove_pack() would do that, this calls the
* unsyncronized version __dev_remove_pack() to avoid multiple delays.
*/
__dev_remove_pack(&fcoe->fcoe_packet_type);
__dev_remove_pack(&fcoe->fip_packet_type);
synchronize_net();
/* Delete secondary MAC addresses */
memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN);
dev_uc_del(netdev, flogi_maddr);
if (fip->spma)
dev_uc_del(netdev, fip->ctl_src_addr);
if (fip->mode == FIP_MODE_VN2VN) {
dev_mc_del(netdev, FIP_ALL_VN2VN_MACS);
dev_mc_del(netdev, FIP_ALL_P2P_MACS);
} else
dev_mc_del(netdev, FIP_ALL_ENODE_MACS);
/* Tell the LLD we are done w/ FCoE */
ops = netdev->netdev_ops;
if (ops->ndo_fcoe_disable) {
if (ops->ndo_fcoe_disable(netdev))
FCOE_NETDEV_DBG(netdev, "Failed to disable FCoE"
" specific feature for LLD.\n");
}
}
/**
* fcoe_interface_release() - fcoe_port kref release function
* @kref: Embedded reference count in an fcoe_interface struct
@ -459,6 +416,68 @@ static inline void fcoe_interface_put(struct fcoe_interface *fcoe)
kref_put(&fcoe->kref, fcoe_interface_release);
}
/**
* fcoe_interface_cleanup() - Clean up a FCoE interface
* @fcoe: The FCoE interface to be cleaned up
*
* Caller must be holding the RTNL mutex
*/
void fcoe_interface_cleanup(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;
struct fcoe_port *port = lport_priv(fcoe->ctlr.lp);
FCOE_NETDEV_DBG(netdev, "Destroying interface\n");
/* Logout of the fabric */
fc_fabric_logoff(fcoe->ctlr.lp);
/* Cleanup the fc_lport */
fc_lport_destroy(fcoe->ctlr.lp);
/* Stop the transmit retry timer */
del_timer_sync(&port->timer);
/* Free existing transmit skbs */
fcoe_clean_pending_queue(fcoe->ctlr.lp);
/*
* Don't listen for Ethernet packets anymore.
* synchronize_net() ensures that the packet handlers are not running
* on another CPU. dev_remove_pack() would do that, this calls the
* unsyncronized version __dev_remove_pack() to avoid multiple delays.
*/
__dev_remove_pack(&fcoe->fcoe_packet_type);
__dev_remove_pack(&fcoe->fip_packet_type);
synchronize_net();
/* Delete secondary MAC addresses */
memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN);
dev_uc_del(netdev, flogi_maddr);
if (fip->spma)
dev_uc_del(netdev, fip->ctl_src_addr);
if (fip->mode == FIP_MODE_VN2VN) {
dev_mc_del(netdev, FIP_ALL_VN2VN_MACS);
dev_mc_del(netdev, FIP_ALL_P2P_MACS);
} else
dev_mc_del(netdev, FIP_ALL_ENODE_MACS);
if (!is_zero_ether_addr(port->data_src_addr))
dev_uc_del(netdev, port->data_src_addr);
/* Tell the LLD we are done w/ FCoE */
ops = netdev->netdev_ops;
if (ops->ndo_fcoe_disable) {
if (ops->ndo_fcoe_disable(netdev))
FCOE_NETDEV_DBG(netdev, "Failed to disable FCoE"
" specific feature for LLD.\n");
}
fcoe_interface_put(fcoe);
}
/**
* fcoe_fip_recv() - Handler for received FIP frames
* @skb: The receive skb
@ -821,39 +840,9 @@ static inline int fcoe_em_config(struct fc_lport *lport)
* fcoe_if_destroy() - Tear down a SW FCoE instance
* @lport: The local port to be destroyed
*
* Locking: must be called with the RTNL mutex held and RTNL mutex
* needed to be dropped by this function since not dropping RTNL
* would cause circular locking warning on synchronous fip worker
* cancelling thru fcoe_interface_put invoked by this function.
*
*/
static void fcoe_if_destroy(struct fc_lport *lport)
{
struct fcoe_port *port = lport_priv(lport);
struct fcoe_interface *fcoe = port->priv;
struct net_device *netdev = fcoe->netdev;
FCOE_NETDEV_DBG(netdev, "Destroying interface\n");
/* Logout of the fabric */
fc_fabric_logoff(lport);
/* Cleanup the fc_lport */
fc_lport_destroy(lport);
/* Stop the transmit retry timer */
del_timer_sync(&port->timer);
/* Free existing transmit skbs */
fcoe_clean_pending_queue(lport);
if (!is_zero_ether_addr(port->data_src_addr))
dev_uc_del(netdev, port->data_src_addr);
rtnl_unlock();
/* receives may not be stopped until after this */
fcoe_interface_put(fcoe);
/* Free queued packets for the per-CPU receive threads */
fcoe_percpu_clean(lport);
@ -1836,6 +1825,7 @@ static int fcoe_enable(struct net_device *netdev)
static int fcoe_destroy(struct net_device *netdev)
{
struct fcoe_interface *fcoe;
struct fc_lport *lport;
int rc = 0;
mutex_lock(&fcoe_config_mutex);
@ -1846,10 +1836,11 @@ static int fcoe_destroy(struct net_device *netdev)
rc = -ENODEV;
goto out_nodev;
}
fcoe_interface_cleanup(fcoe);
lport = fcoe->ctlr.lp;
list_del(&fcoe->list);
/* RTNL mutex is dropped by fcoe_if_destroy */
fcoe_if_destroy(fcoe->ctlr.lp);
fcoe_interface_cleanup(fcoe);
rtnl_unlock();
fcoe_if_destroy(lport);
out_nodev:
mutex_unlock(&fcoe_config_mutex);
return rc;
@ -1865,8 +1856,6 @@ static void fcoe_destroy_work(struct work_struct *work)
port = container_of(work, struct fcoe_port, destroy_work);
mutex_lock(&fcoe_config_mutex);
rtnl_lock();
/* RTNL mutex is dropped by fcoe_if_destroy */
fcoe_if_destroy(port->lport);
mutex_unlock(&fcoe_config_mutex);
}