From af7f85d95a34b04f5cf8c3b8c2d4cdd179dc1e19 Mon Sep 17 00:00:00 2001 From: Chris Leech Date: Tue, 25 Aug 2009 13:59:24 -0700 Subject: [PATCH] [SCSI] fcoe: interface changes to fcoe_if_create and fcoe_if_destroy 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 Signed-off-by: Robert Love Signed-off-by: James Bottomley --- drivers/scsi/fcoe/fcoe.c | 113 +++++++++++++++++---------------------- 1 file changed, 48 insertions(+), 65 deletions(-) diff --git a/drivers/scsi/fcoe/fcoe.c b/drivers/scsi/fcoe/fcoe.c index e481882a3e8f..749279698137 100644 --- a/drivers/scsi/fcoe/fcoe.c +++ b/drivers/scsi/fcoe/fcoe.c @@ -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 @@ skip_oem: /** * 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 @@ out_nodev: 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);