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[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: Yi Zou <yi.zou@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:
Yi Zou 2009-11-20 14:55:19 -08:00 committed by James Bottomley
parent b21a0c397e
commit b84056bf68
2 changed files with 40 additions and 0 deletions
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34
drivers/scsi/fcoe/fcoe.c
View File

@ -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);
}

6
include/scsi/libfc.h
View File

@ -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.
*