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authorChris Leech <christopher.leech@intel.com>2009-11-03 11:46:14 -0800
committerJames Bottomley <James.Bottomley@suse.de>2009-12-04 12:00:56 -0600
commit174e1ebffd30a7599b889900089f7acef944cc6b (patch)
tree69b5d4e22f1b997128789eddcd1ec61a33d5903e /drivers/scsi/libfc/fc_exch.c
parent86221969e20a2f60ce104160dc836a964974673b (diff)
[SCSI] libfc: add some generic NPIV support routines to libfc
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>
Diffstat (limited to 'drivers/scsi/libfc/fc_exch.c')
-rw-r--r--drivers/scsi/libfc/fc_exch.c29
1 files changed, 29 insertions, 0 deletions
diff --git a/drivers/scsi/libfc/fc_exch.c b/drivers/scsi/libfc/fc_exch.c
index ee6031e24c1..751a485685d 100644
--- a/drivers/scsi/libfc/fc_exch.c
+++ b/drivers/scsi/libfc/fc_exch.c
@@ -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,