Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit b84056bf authored by Yi Zou's avatar Yi Zou Committed by James Bottomley
Browse files

[SCSI] fcoe, libfc: add get_lesb() to allow LLD to fill the link error status block (LESB) 



Add a member function pointer as get_lesb to libfc_function_template so LLD
can fill the LESB based on its own statistics. For fcoe, it fills the LESB
as a fcoe_fc_els_lesb struct according to FC-BB-5.

Signed-off-by: default avatarYi Zou <yi.zou@intel.com>
Signed-off-by: default avatarRobert Love <robert.w.love@intel.com>
Signed-off-by: default avatarJames Bottomley <James.Bottomley@suse.de>
parent b21a0c39

drivers/scsi/fcoe/fcoe.c

+34 −0
Original line number Diff line number Diff line
@@ -111,6 +111,8 @@ static struct fc_seq *fcoe_elsct_send(struct fc_lport *, 
				      void *, u32 timeout);

static void fcoe_recv_frame(struct sk_buff *skb);



static void fcoe_get_lesb(struct fc_lport *, struct fc_els_lesb *);



module_param_call(create, fcoe_create, NULL, NULL, S_IWUSR);

__MODULE_PARM_TYPE(create, "string");

MODULE_PARM_DESC(create, "Create fcoe fcoe using net device passed in.");
@@ -141,6 +143,7 @@ static struct libfc_function_template fcoe_libfc_fcn_templ = { 
	.ddp_setup = fcoe_ddp_setup,

	.ddp_done = fcoe_ddp_done,

	.elsct_send = fcoe_elsct_send,

	.get_lesb = fcoe_get_lesb,

};



struct fc_function_template fcoe_transport_function = {
@@ -2455,3 +2458,34 @@ static void fcoe_set_vport_symbolic_name(struct fc_vport *vport) 
	lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, FC_NS_RSPN_ID,

			     NULL, NULL, 3 * lport->r_a_tov);

}



/**

 * fcoe_get_lesb() - Fill the FCoE Link Error Status Block

 * @lport: the local port

 * @fc_lesb: the link error status block

 */

static void fcoe_get_lesb(struct fc_lport *lport,

			 struct fc_els_lesb *fc_lesb)

{

	unsigned int cpu;

	u32 lfc, vlfc, mdac;

	struct fcoe_dev_stats *devst;

	struct fcoe_fc_els_lesb *lesb;

	struct net_device *netdev = fcoe_netdev(lport);



	lfc = 0;

	vlfc = 0;

	mdac = 0;

	lesb = (struct fcoe_fc_els_lesb *)fc_lesb;

	memset(lesb, 0, sizeof(*lesb));

	for_each_possible_cpu(cpu) {

		devst = per_cpu_ptr(lport->dev_stats, cpu);

		lfc += devst->LinkFailureCount;

		vlfc += devst->VLinkFailureCount;

		mdac += devst->MissDiscAdvCount;

	}

	lesb->lesb_link_fail = htonl(lfc);

	lesb->lesb_vlink_fail = htonl(vlfc);

	lesb->lesb_miss_fka = htonl(mdac);

	lesb->lesb_fcs_error = htonl(dev_get_stats(netdev)->rx_crc_errors);

}

include/scsi/libfc.h

+6 −0
Original line number Diff line number Diff line
@@ -510,6 +510,12 @@ struct libfc_function_template { 
	 * STATUS: OPTIONAL

	 */

	int (*ddp_done)(struct fc_lport *, u16);

	/*

	 * Allow LLD to fill its own Link Error Status Block

	 *

	 * STATUS: OPTIONAL

	 */

	void (*get_lesb)(struct fc_lport *, struct fc_els_lesb *lesb);

	/*

	 * Send a frame using an existing sequence and exchange.

	 *