[SCSI] fcoe, bnx2fc, libfcoe: SW FCoE and bnx2fc use FCoE Syfs

This patch has the SW FCoE driver and the bnx2fc
driver make use of the new fcoe_sysfs API added
earlier in this patch series.

After this patch a fcoe_ctlr_device is allocated with
private data in this order.

+------------------+   +------------------+
| fcoe_ctlr_device |   | fcoe_ctlr_device |
+------------------+   +------------------+
| fcoe_ctlr        |   | fcoe_ctlr        |
+------------------+   +------------------+
| fcoe_interface   |   | bnx2fc_interface |
+------------------+   +------------------+

libfcoe also takes part in this new model since it
discovers and manages fcoe_fcf instances. The memory
allocation is different for FCFs. I didn't want to
impact libfcoe's fcoe_fcf processing, so this patch
creates fcoe_fcf_device instances for each discovered
fcoe_fcf. The two are paired using a (void * priv)
member of the fcoe_ctlr_device. This allows libfcoe
to continue maintaining its list of fcoe_fcf instances
and simply attaches and detaches them from existing
or new fcoe_fcf_device instances.

Signed-off-by: Robert Love <robert.w.love@intel.com>
Tested-by: Ross Brattain <ross.b.brattain@intel.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>

1 files changed, 17 insertions, 0 deletions

diff --git a/include/scsi/libfcoe.h b/include/scsi/libfcoe.h
index 7b93f211b935..22b07cc99808 100644
--- a/include/scsi/libfcoe.h
+++ b/include/scsi/libfcoe.h
@@ -168,9 +168,16 @@ static inline void *fcoe_ctlr_priv(const struct fcoe_ctlr *ctlr)
         return (void *)(ctlr + 1);
 }
 
+#define fcoe_ctlr_to_ctlr_dev(x)                                        \
+        (struct fcoe_ctlr_device *)(((struct fcoe_ctlr_device *)(x)) - 1)
+
 /**
  * struct fcoe_fcf - Fibre-Channel Forwarder
  * @list:        list linkage
+ * @event_work:  Work for FC Transport actions queue
+ * @event:       The event to be processed
+ * @fip:         The controller that the FCF was discovered on
+ * @fcf_dev:     The associated fcoe_fcf_device instance
  * @time:        system time (jiffies) when an advertisement was last received
  * @switch_name: WWN of switch from advertisement
  * @fabric_name: WWN of fabric from advertisement
@@ -192,6 +199,9 @@ static inline void *fcoe_ctlr_priv(const struct fcoe_ctlr *ctlr)
  */
 struct fcoe_fcf {
         struct list_head list;
+        struct work_struct event_work;
+        struct fcoe_ctlr *fip;
+        struct fcoe_fcf_device *fcf_dev;
         unsigned long time;
 
         u64 switch_name;
@@ -208,6 +218,9 @@ struct fcoe_fcf {
         u8 fd_flags:1;
 };
 
+#define fcoe_fcf_to_fcf_dev(x)                  \
+        ((x)->fcf_dev)
+
 /**
  * struct fcoe_rport - VN2VN remote port
  * @time:       time of create or last beacon packet received from node
@@ -343,6 +356,10 @@ void fcoe_queue_timer(ulong lport);
 int fcoe_get_paged_crc_eof(struct sk_buff *skb, int tlen,
                            struct fcoe_percpu_s *fps);
 
+/* FCoE Sysfs helpers */
+void fcoe_fcf_get_selected(struct fcoe_fcf_device *);
+void fcoe_ctlr_get_fip_mode(struct fcoe_ctlr_device *);
+
 /**
  * struct netdev_list
  * A mapping from netdevice to fcoe_transport