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[SCSI] libfc: add some generic NPIV support routines to libfc

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Adds a function to create a new VN_Port instances, which share the EM
list with the N_Port, VN_Port lookup by fabric ID when responding to a new
request (otherwise the exchange lookup from the N_Ports EM list is trusted to
return an exchange with a cached lport value for the correct VN_Port),
a pointer to a fc_vport structure for VN_Ports, and flags to indicate if an
N_Port supports NPIV and if the switch/fabric allows it.

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
2009-11-03 11:46:14 -08:00
committed by James Bottomley
parent 86221969e2
commit 174e1ebffd
4 changed files with 137 additions and 1 deletions
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29
drivers/scsi/libfc/fc_exch.c
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@@ -1134,6 +1134,15 @@ static void fc_exch_recv_req(struct fc_lport *lp, struct fc_exch_mgr *mp,
u32 f_ctl;
enum fc_pf_rjt_reason reject;
/* We can have the wrong fc_lport at this point with NPIV, which is a
* problem now that we know a new exchange needs to be allocated
*/
lp = fc_vport_id_lookup(lp, ntoh24(fh->fh_d_id));
if (!lp) {
fc_frame_free(fp);
return;
}
fr_seq(fp) = NULL;
reject = fc_seq_lookup_recip(lp, mp, fp);
if (reject == FC_RJT_NONE) {
@@ -1900,6 +1909,26 @@ void fc_exch_mgr_del(struct fc_exch_mgr_anchor *ema)
}
EXPORT_SYMBOL(fc_exch_mgr_del);
/**
* fc_exch_mgr_list_clone() - share all exchange manager objects
* @src: source lport to clone exchange managers from
* @dst: new lport that takes references to all the exchange managers
*/
int fc_exch_mgr_list_clone(struct fc_lport *src, struct fc_lport *dst)
{
struct fc_exch_mgr_anchor *ema, *tmp;
list_for_each_entry(ema, &src->ema_list, ema_list) {
if (!fc_exch_mgr_add(dst, ema->mp, ema->match))
goto err;
}
return 0;
err:
list_for_each_entry_safe(ema, tmp, &dst->ema_list, ema_list)
fc_exch_mgr_del(ema);
return -ENOMEM;
}
struct fc_exch_mgr *fc_exch_mgr_alloc(struct fc_lport *lp,
enum fc_class class,
u16 min_xid, u16 max_xid,