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[SCSI] fcoe: interface changes to fcoe_if_create and fcoe_if_destroy

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By passing in the parent device instead of assuming the netdev is what
should be used, fcoe_if_create becomes usable for NPIV vports as well.
You still need a netdev, because that's how FCoE works.  Also removed some
duplicate checks from fcoe_if_create that are already in fcoe_create.

fcoe_if_destroy needs to take an lport as it's only argument, not a netdev.
That removes the 1:1 netdev:lport assumption from the destroy path.

Signed-off-by: Chris Leech <christopher.leech@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:
Chris Leech 2009-08-25 13:59:24 -07:00 committed by James Bottomley
parent 36eb7fc872
commit af7f85d95a
1 changed files with 48 additions and 65 deletions
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113
drivers/scsi/fcoe/fcoe.c
View file

@ -1,5 +1,5 @@
/*
* Copyright(c) 2007 - 2008 Intel Corporation. All rights reserved.
* Copyright(c) 2007 - 2009 Intel Corporation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
@ -506,30 +506,20 @@ static inline int fcoe_em_config(struct fc_lport *lp)
/**
* fcoe_if_destroy() - FCoE software HBA tear-down function
* @netdev: ptr to the associated net_device
*
* Returns: 0 if link is OK for use by FCoE.
* @lport: fc_lport to destroy
*/
static int fcoe_if_destroy(struct net_device *netdev)
static void fcoe_if_destroy(struct fc_lport *lport)
{
struct fc_lport *lp = NULL;
struct fcoe_softc *fc;
BUG_ON(!netdev);
struct fcoe_softc *fc = lport_priv(lport);
struct net_device *netdev = fc->netdev;
FCOE_NETDEV_DBG(netdev, "Destroying interface\n");
lp = fcoe_hostlist_lookup(netdev);
if (!lp)
return -ENODEV;
fc = lport_priv(lp);
/* Logout of the fabric */
fc_fabric_logoff(lp);
fc_fabric_logoff(lport);
/* Remove the instance from fcoe's list */
fcoe_hostlist_remove(lp);
fcoe_hostlist_remove(lport);
/* clean up netdev configurations */
fcoe_netdev_cleanup(fc);
@ -538,33 +528,31 @@ static int fcoe_if_destroy(struct net_device *netdev)
fcoe_ctlr_destroy(&fc->ctlr);
/* Free queued packets for the per-CPU receive threads */
fcoe_percpu_clean(lp);
fcoe_percpu_clean(lport);
/* Cleanup the fc_lport */
fc_lport_destroy(lp);
fc_fcp_destroy(lp);
fc_lport_destroy(lport);
fc_fcp_destroy(lport);
/* Detach from the scsi-ml */
fc_remove_host(lp->host);
scsi_remove_host(lp->host);
fc_remove_host(lport->host);
scsi_remove_host(lport->host);
/* There are no more rports or I/O, free the EM */
fc_exch_mgr_free(lp);
fc_exch_mgr_free(lport);
/* Free existing skbs */
fcoe_clean_pending_queue(lp);
fcoe_clean_pending_queue(lport);
/* Stop the timer */
del_timer_sync(&fc->timer);
/* Free memory used by statistical counters */
fc_lport_free_stats(lp);
fc_lport_free_stats(lport);
/* Release the net_device and Scsi_Host */
dev_put(netdev);
scsi_host_put(lp->host);
return 0;
scsi_host_put(lport->host);
}
/*
@ -612,38 +600,35 @@ static struct libfc_function_template fcoe_libfc_fcn_templ = {
/**
* fcoe_if_create() - this function creates the fcoe interface
* @netdev: pointer the associated netdevice
* @parent: device pointer to be the parent in sysfs for the SCSI host
*
* Creates fc_lport struct and scsi_host for lport, configures lport
* and starts fabric login.
*
* Returns : 0 on success
* Returns : The allocated fc_lport or an error pointer
*/
static int fcoe_if_create(struct net_device *netdev)
static struct fc_lport *fcoe_if_create(struct net_device *netdev,
struct device *parent)
{
int rc;
struct fc_lport *lp = NULL;
struct fc_lport *lport = NULL;
struct fcoe_softc *fc;
struct Scsi_Host *shost;
BUG_ON(!netdev);
FCOE_NETDEV_DBG(netdev, "Create Interface\n");
lp = fcoe_hostlist_lookup(netdev);
if (lp)
return -EEXIST;
shost = libfc_host_alloc(&fcoe_shost_template,
sizeof(struct fcoe_softc));
if (!shost) {
FCOE_NETDEV_DBG(netdev, "Could not allocate host structure\n");
return -ENOMEM;
rc = -ENOMEM;
goto out;
}
lp = shost_priv(shost);
fc = lport_priv(lp);
lport = shost_priv(shost);
fc = lport_priv(lport);
/* configure fc_lport, e.g., em */
rc = fcoe_lport_config(lp);
rc = fcoe_lport_config(lport);
if (rc) {
FCOE_NETDEV_DBG(netdev, "Could not configure lport for the "
"interface\n");
@ -658,7 +643,7 @@ static int fcoe_if_create(struct net_device *netdev)
fc->ctlr.update_mac = fcoe_update_src_mac;
/* configure lport network properties */
rc = fcoe_netdev_config(lp, netdev);
rc = fcoe_netdev_config(lport, netdev);
if (rc) {
FCOE_NETDEV_DBG(netdev, "Could not configure netdev for the "
"interface\n");
@ -666,7 +651,7 @@ static int fcoe_if_create(struct net_device *netdev)
}
/* configure lport scsi host properties */
rc = fcoe_shost_config(lp, shost, &netdev->dev);
rc = fcoe_shost_config(lport, shost, parent);
if (rc) {
FCOE_NETDEV_DBG(netdev, "Could not configure shost for the "
"interface\n");
@ -674,7 +659,7 @@ static int fcoe_if_create(struct net_device *netdev)
}
/* Initialize the library */
rc = fcoe_libfc_config(lp, &fcoe_libfc_fcn_templ);
rc = fcoe_libfc_config(lport, &fcoe_libfc_fcn_templ);
if (rc) {
FCOE_NETDEV_DBG(netdev, "Could not configure libfc for the "
"interface\n");
@ -689,7 +674,7 @@ static int fcoe_if_create(struct net_device *netdev)
*/
write_lock(&fcoe_hostlist_lock);
/* lport exch manager allocation */
rc = fcoe_em_config(lp);
rc = fcoe_em_config(lport);
if (rc) {
FCOE_NETDEV_DBG(netdev, "Could not configure the EM for the "
"interface\n");
@ -697,27 +682,28 @@ static int fcoe_if_create(struct net_device *netdev)
}
/* add to lports list */
fcoe_hostlist_add(lp);
fcoe_hostlist_add(lport);
write_unlock(&fcoe_hostlist_lock);
lp->boot_time = jiffies;
lport->boot_time = jiffies;
fc_fabric_login(lp);
fc_fabric_login(lport);
if (!fcoe_link_ok(lp))
if (!fcoe_link_ok(lport))
fcoe_ctlr_link_up(&fc->ctlr);
dev_hold(netdev);
return rc;
return lport;
out_lp_destroy:
fc_exch_mgr_free(lp);
fc_exch_mgr_free(lport);
out_netdev_cleanup:
fcoe_netdev_cleanup(fc);
out_host_put:
scsi_host_put(lp->host);
return rc;
scsi_host_put(lport->host);
out:
return ERR_PTR(rc);
}
/**
@ -1616,8 +1602,9 @@ static int fcoe_ethdrv_put(const struct net_device *netdev)
*/
static int fcoe_destroy(const char *buffer, struct kernel_param *kp)
{
int rc;
struct net_device *netdev;
struct fc_lport *lport;
int rc;
netdev = fcoe_if_to_netdev(buffer);
if (!netdev) {
@ -1625,17 +1612,12 @@ static int fcoe_destroy(const char *buffer, struct kernel_param *kp)
goto out_nodev;
}
/* look for existing lport */
if (!fcoe_hostlist_lookup(netdev)) {
lport = fcoe_hostlist_lookup(netdev);
if (!lport) {
rc = -ENODEV;
goto out_putdev;
}
rc = fcoe_if_destroy(netdev);
if (rc) {
printk(KERN_ERR "fcoe: Failed to destroy interface (%s)\n",
netdev->name);
rc = -EIO;
goto out_putdev;
}
fcoe_if_destroy(lport);
fcoe_ethdrv_put(netdev);
rc = 0;
out_putdev:
@ -1654,6 +1636,7 @@ static int fcoe_destroy(const char *buffer, struct kernel_param *kp)
static int fcoe_create(const char *buffer, struct kernel_param *kp)
{
int rc;
struct fc_lport *lport;
struct net_device *netdev;
netdev = fcoe_if_to_netdev(buffer);
@ -1668,8 +1651,8 @@ static int fcoe_create(const char *buffer, struct kernel_param *kp)
}
fcoe_ethdrv_get(netdev);
rc = fcoe_if_create(netdev);
if (rc) {
lport = fcoe_if_create(netdev, &netdev->dev);
if (IS_ERR(lport)) {
printk(KERN_ERR "fcoe: Failed to create interface (%s)\n",
netdev->name);
fcoe_ethdrv_put(netdev);
@ -1926,7 +1909,7 @@ static void __exit fcoe_exit(void)
/* releases the associated fcoe hosts */
list_for_each_entry_safe(fc, tmp, &fcoe_hostlist, list)
fcoe_if_destroy(fc->netdev);
fcoe_if_destroy(fc->ctlr.lp);
unregister_hotcpu_notifier(&fcoe_cpu_notifier);