Commit 435c8667 authored by Robert Love's avatar Robert Love
Browse files

fcoe: Use the fcoe_sysfs control interface 



This patch adds support for the new fcoe_sysfs
control interface to fcoe.ko. It keeps the deprecated
interface in tact and therefore either the legacy
or the new control interfaces can be used. A mixed mode
is not supported. A user must either use the new
interfaces or the old ones, but not both.

The fcoe_ctlr's link state is now driven by both the
netdev link state as well as the fcoe_ctlr_device's
enabled attribute. The link must be up and the
fcoe_ctlr_device must be enabled before the FCoE
Controller starts discovery or login.

Signed-off-by: default avatarRobert Love <robert.w.love@intel.com>
Acked-by: default avatarNeil Horman <nhorman@tuxdriver.com>
parent 6a891b07

drivers/scsi/fcoe/fcoe.c

+132 −15
Original line number Diff line number Diff line
@@ -117,6 +117,11 @@ static int fcoe_destroy(struct net_device *netdev); 
static int fcoe_enable(struct net_device *netdev);

static int fcoe_disable(struct net_device *netdev);



/* fcoe_syfs control interface handlers */

static int fcoe_ctlr_alloc(struct net_device *netdev);

static int fcoe_ctlr_enabled(struct fcoe_ctlr_device *cdev);





static struct fc_seq *fcoe_elsct_send(struct fc_lport *,

				      u32 did, struct fc_frame *,

				      unsigned int op,
@@ -155,6 +160,8 @@ static void fcoe_ctlr_get_lesb(struct fcoe_ctlr_device *); 
static void fcoe_fcf_get_vlan_id(struct fcoe_fcf_device *);



static struct fcoe_sysfs_function_template fcoe_sysfs_templ = {

	.set_fcoe_ctlr_mode = fcoe_ctlr_set_fip_mode,

	.set_fcoe_ctlr_enabled = fcoe_ctlr_enabled,

	.get_fcoe_ctlr_link_fail = fcoe_ctlr_get_lesb,

	.get_fcoe_ctlr_vlink_fail = fcoe_ctlr_get_lesb,

	.get_fcoe_ctlr_miss_fka = fcoe_ctlr_get_lesb,
@@ -1963,6 +1970,7 @@ static int fcoe_dcb_app_notification(struct notifier_block *notifier, 
static int fcoe_device_notification(struct notifier_block *notifier,

				    ulong event, void *ptr)

{

	struct fcoe_ctlr_device *cdev;

	struct fc_lport *lport = NULL;

	struct net_device *netdev = ptr;

	struct fcoe_ctlr *ctlr;
@@ -2019,13 +2027,29 @@ static int fcoe_device_notification(struct notifier_block *notifier, 


	fcoe_link_speed_update(lport);



	if (link_possible && !fcoe_link_ok(lport))

	cdev = fcoe_ctlr_to_ctlr_dev(ctlr);



	if (link_possible && !fcoe_link_ok(lport)) {

		switch (cdev->enabled) {

		case FCOE_CTLR_DISABLED:

			pr_info("Link up while interface is disabled.\n");

			break;

		case FCOE_CTLR_ENABLED:

		case FCOE_CTLR_UNUSED:

			fcoe_ctlr_link_up(ctlr);

	else if (fcoe_ctlr_link_down(ctlr)) {

		};

	} else if (fcoe_ctlr_link_down(ctlr)) {

		switch (cdev->enabled) {

		case FCOE_CTLR_DISABLED:

			pr_info("Link down while interface is disabled.\n");

			break;

		case FCOE_CTLR_ENABLED:

		case FCOE_CTLR_UNUSED:

			stats = per_cpu_ptr(lport->stats, get_cpu());

			stats->LinkFailureCount++;

			put_cpu();

			fcoe_clean_pending_queue(lport);

		};

	}

out:

	return rc;
@@ -2038,6 +2062,8 @@ out: 
 * Called from fcoe transport.

 *

 * Returns: 0 for success

 *

 * Deprecated: use fcoe_ctlr_enabled()

 */

static int fcoe_disable(struct net_device *netdev)

{
@@ -2096,6 +2122,33 @@ out: 
	return rc;

}



/**

 * fcoe_ctlr_enabled() - Enable or disable an FCoE Controller

 * @cdev: The FCoE Controller that is being enabled or disabled

 *

 * fcoe_sysfs will ensure that the state of 'enabled' has

 * changed, so no checking is necessary here. This routine simply

 * calls fcoe_enable or fcoe_disable, both of which are deprecated.

 * When those routines are removed the functionality can be merged

 * here.

 */

static int fcoe_ctlr_enabled(struct fcoe_ctlr_device *cdev)

{

	struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(cdev);

	struct fc_lport *lport = ctlr->lp;

	struct net_device *netdev = fcoe_netdev(lport);



	switch (cdev->enabled) {

	case FCOE_CTLR_ENABLED:

		return fcoe_enable(netdev);

	case FCOE_CTLR_DISABLED:

		return fcoe_disable(netdev);

	case FCOE_CTLR_UNUSED:

	default:

		return -ENOTSUPP;

	};

}



/**

 * fcoe_destroy() - Destroy a FCoE interface

 * @netdev  : The net_device object the Ethernet interface to create on
@@ -2203,16 +2256,26 @@ static void fcoe_dcb_create(struct fcoe_interface *fcoe) 
#endif

}



enum fcoe_create_link_state {

	FCOE_CREATE_LINK_DOWN,

	FCOE_CREATE_LINK_UP,

};



/**

 * fcoe_create() - Create a fcoe interface

 * _fcoe_create() - (internal) Create a fcoe interface

 * @netdev  :   The net_device object the Ethernet interface to create on

 * @fip_mode:   The FIP mode for this creation

 * @link_state: The ctlr link state on creation

 *

 * Called from fcoe transport

 * Called from either the libfcoe 'create' module parameter

 * via fcoe_create or from fcoe_syfs's ctlr_create file.

 *

 * Returns: 0 for success

 * libfcoe's 'create' module parameter is deprecated so some

 * consolidation of code can be done when that interface is

 * removed.

 */

static int fcoe_create(struct net_device *netdev, enum fip_state fip_mode)

static int _fcoe_create(struct net_device *netdev, enum fip_state fip_mode,

			enum fcoe_create_link_state link_state)

{

	int rc = 0;

	struct fcoe_ctlr_device *ctlr_dev;
@@ -2259,7 +2322,26 @@ static int fcoe_create(struct net_device *netdev, enum fip_state fip_mode) 
	/* start FIP Discovery and FLOGI */

	lport->boot_time = jiffies;

	fc_fabric_login(lport);

	if (!fcoe_link_ok(lport)) {



	/*

	 * If the fcoe_ctlr_device is to be set to DISABLED

	 * it must be done after the lport is added to the

	 * hostlist, but before the rtnl_lock is released.

	 * This is because the rtnl_lock protects the

	 * hostlist that fcoe_device_notification uses. If

	 * the FCoE Controller is intended to be created

	 * DISABLED then 'enabled' needs to be considered

	 * handling link events. 'enabled' must be set

	 * before the lport can be found in the hostlist

	 * when a link up event is received.

	 */

	if (link_state == FCOE_CREATE_LINK_UP)

		ctlr_dev->enabled = FCOE_CTLR_ENABLED;

	else

		ctlr_dev->enabled = FCOE_CTLR_DISABLED;



	if (link_state == FCOE_CREATE_LINK_UP &&

	    !fcoe_link_ok(lport)) {

		rtnl_unlock();

		fcoe_ctlr_link_up(ctlr);

		mutex_unlock(&fcoe_config_mutex);
@@ -2273,6 +2355,37 @@ out_nortnl: 
	return rc;

}



/**

 * fcoe_create() - Create a fcoe interface

 * @netdev  : The net_device object the Ethernet interface to create on

 * @fip_mode: The FIP mode for this creation

 *

 * Called from fcoe transport

 *

 * Returns: 0 for success

 */

static int fcoe_create(struct net_device *netdev, enum fip_state fip_mode)

{

	return _fcoe_create(netdev, fip_mode, FCOE_CREATE_LINK_UP);

}



/**

 * fcoe_ctlr_alloc() - Allocate a fcoe interface from fcoe_sysfs

 * @netdev: The net_device to be used by the allocated FCoE Controller

 *

 * This routine is called from fcoe_sysfs. It will start the fcoe_ctlr

 * in a link_down state. The allows the user an opportunity to configure

 * the FCoE Controller from sysfs before enabling the FCoE Controller.

 *

 * Creating in with this routine starts the FCoE Controller in Fabric

 * mode. The user can change to VN2VN or another mode before enabling.

 */

static int fcoe_ctlr_alloc(struct net_device *netdev)

{

	return _fcoe_create(netdev, FIP_MODE_FABRIC,

			    FCOE_CREATE_LINK_DOWN);

}



/**

 * fcoe_link_speed_update() - Update the supported and actual link speeds

 * @lport: The local port to update speeds for
@@ -2374,10 +2487,13 @@ static int fcoe_reset(struct Scsi_Host *shost) 
	struct fcoe_port *port = lport_priv(lport);

	struct fcoe_interface *fcoe = port->priv;

	struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe);

	struct fcoe_ctlr_device *cdev = fcoe_ctlr_to_ctlr_dev(ctlr);



	fcoe_ctlr_link_down(ctlr);

	fcoe_clean_pending_queue(ctlr->lp);

	if (!fcoe_link_ok(ctlr->lp))



	if (cdev->enabled != FCOE_CTLR_DISABLED &&

	    !fcoe_link_ok(ctlr->lp))

		fcoe_ctlr_link_up(ctlr);

	return 0;

}
@@ -2450,6 +2566,7 @@ static struct fcoe_transport fcoe_sw_transport = { 
	.attached = false,

	.list = LIST_HEAD_INIT(fcoe_sw_transport.list),

	.match = fcoe_match,

	.alloc = fcoe_ctlr_alloc,

	.create = fcoe_create,

	.destroy = fcoe_destroy,

	.enable = fcoe_enable,

drivers/scsi/fcoe/fcoe_ctlr.c

+8 −9
Original line number Diff line number Diff line
@@ -2864,22 +2864,21 @@ void fcoe_fcf_get_selected(struct fcoe_fcf_device *fcf_dev) 
}

EXPORT_SYMBOL(fcoe_fcf_get_selected);



void fcoe_ctlr_get_fip_mode(struct fcoe_ctlr_device *ctlr_dev)

void fcoe_ctlr_set_fip_mode(struct fcoe_ctlr_device *ctlr_dev)

{

	struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(ctlr_dev);



	mutex_lock(&ctlr->ctlr_mutex);

	switch (ctlr->mode) {

	case FIP_MODE_FABRIC:

		ctlr_dev->mode = FIP_CONN_TYPE_FABRIC;

		break;

	case FIP_MODE_VN2VN:

		ctlr_dev->mode = FIP_CONN_TYPE_VN2VN;

	switch (ctlr_dev->mode) {

	case FIP_CONN_TYPE_VN2VN:

		ctlr->mode = FIP_MODE_VN2VN;

		break;

	case FIP_CONN_TYPE_FABRIC:

	default:

		ctlr_dev->mode = FIP_CONN_TYPE_UNKNOWN;

		ctlr->mode = FIP_MODE_FABRIC;

		break;

	}



	mutex_unlock(&ctlr->ctlr_mutex);

}

EXPORT_SYMBOL(fcoe_ctlr_get_fip_mode);
 
EXPORT_SYMBOL(fcoe_ctlr_set_fip_mode);

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