[SCSI] libfc: add discovery-private pointer for LLD
For VN_port to VN_port mode, FIP will do discovery and needs a
way to find its state from the local port or discovery structure.
It seems that any other LLD that implements its own discovery
would also need something like this.
Replace disc->lport with disc->priv, and use container_of to
find the lport. We could use disc->priv for that, but
container_of is smaller and faster.
Signed-off-by: Joe Eykholt <jeykholt@cisco.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
diff --git a/drivers/scsi/libfc/fc_disc.c b/drivers/scsi/libfc/fc_disc.c
index d0fa9a0..0447455 100644
--- a/drivers/scsi/libfc/fc_disc.c
+++ b/drivers/scsi/libfc/fc_disc.c
@@ -65,7 +65,7 @@
struct fc_lport *lport;
struct fc_rport_priv *rdata;
- lport = disc->lport;
+ lport = fc_disc_lport(disc);
mutex_lock(&disc->disc_mutex);
list_for_each_entry_rcu(rdata, &disc->rports, peers)
@@ -96,7 +96,7 @@
LIST_HEAD(disc_ports);
struct fc_disc_port *dp, *next;
- lport = disc->lport;
+ lport = fc_disc_lport(disc);
FC_DISC_DBG(disc, "Received an RSCN event\n");
@@ -275,7 +275,7 @@
*/
static void fc_disc_done(struct fc_disc *disc, enum fc_disc_event event)
{
- struct fc_lport *lport = disc->lport;
+ struct fc_lport *lport = fc_disc_lport(disc);
struct fc_rport_priv *rdata;
FC_DISC_DBG(disc, "Discovery complete\n");
@@ -313,7 +313,7 @@
*/
static void fc_disc_error(struct fc_disc *disc, struct fc_frame *fp)
{
- struct fc_lport *lport = disc->lport;
+ struct fc_lport *lport = fc_disc_lport(disc);
unsigned long delay = 0;
FC_DISC_DBG(disc, "Error %ld, retries %d/%d\n",
@@ -353,7 +353,7 @@
static void fc_disc_gpn_ft_req(struct fc_disc *disc)
{
struct fc_frame *fp;
- struct fc_lport *lport = disc->lport;
+ struct fc_lport *lport = fc_disc_lport(disc);
WARN_ON(!fc_lport_test_ready(lport));
@@ -396,7 +396,7 @@
struct fc_rport_identifiers ids;
struct fc_rport_priv *rdata;
- lport = disc->lport;
+ lport = fc_disc_lport(disc);
disc->seq_count++;
/*
@@ -733,7 +733,7 @@
mutex_init(&disc->disc_mutex);
INIT_LIST_HEAD(&disc->rports);
- disc->lport = lport;
+ disc->priv = lport;
return 0;
}
diff --git a/drivers/scsi/libfc/fc_libfc.h b/drivers/scsi/libfc/fc_libfc.h
index f5c0ca4..16d2162 100644
--- a/drivers/scsi/libfc/fc_libfc.h
+++ b/drivers/scsi/libfc/fc_libfc.h
@@ -52,7 +52,7 @@
#define FC_DISC_DBG(disc, fmt, args...) \
FC_CHECK_LOGGING(FC_DISC_LOGGING, \
printk(KERN_INFO "host%u: disc: " fmt, \
- (disc)->lport->host->host_no, \
+ fc_disc_lport(disc)->host->host_no, \
##args))
#define FC_RPORT_ID_DBG(lport, port_id, fmt, args...) \
diff --git a/include/scsi/libfc.h b/include/scsi/libfc.h
index fcbee8c..5f64e59 100644
--- a/include/scsi/libfc.h
+++ b/include/scsi/libfc.h
@@ -739,7 +739,7 @@
* @buf_len: Length of the discovery buffer
* @disc_id: Discovery ID
* @rports: List of discovered remote ports
- * @lport: The local port that discovery is for
+ * @priv: Private pointer for use by discovery code
* @disc_mutex: Mutex that protects the discovery context
* @partial_buf: Partial name buffer (if names are returned
* in multiple frames)
@@ -755,7 +755,7 @@
u16 disc_id;
struct list_head rports;
- struct fc_lport *lport;
+ void *priv;
struct mutex disc_mutex;
struct fc_gpn_ft_resp partial_buf;
struct delayed_work disc_work;
@@ -1003,6 +1003,11 @@
*****************************/
int fc_disc_init(struct fc_lport *);
+static inline struct fc_lport *fc_disc_lport(struct fc_disc *disc)
+{
+ return container_of(disc, struct fc_lport, disc);
+}
+
/*
* FCP LAYER
*****************************/