From: Joe Eykholt <jeykholt@xxxxxxxxx>
For incoming ELS and FCP requests, we often don't require an
exchange and sequence, however, sometimes we do. For those cases,
(primarily FCP requests for targets) add a function to set up
the exchange and sequence.
Signed-off-by: Joe Eykholt <jeykholt@xxxxxxxxx>
Signed-off-by: Robert Love <robert.w.love@xxxxxxxxx>
---
drivers/scsi/libfc/fc_exch.c | 25 +++++++++++++++++++++++++
include/scsi/libfc.h | 7 +++++++
2 files changed, 32 insertions(+), 0 deletions(-)
diff --git a/drivers/scsi/libfc/fc_exch.c b/drivers/scsi/libfc/fc_exch.c
index 61eabd3..027042a 100644
--- a/drivers/scsi/libfc/fc_exch.c
+++ b/drivers/scsi/libfc/fc_exch.c
@@ -1231,6 +1231,28 @@ free:
}
/**
+ * fc_seq_assign() - Assign exchange and sequence for incoming request
+ * @lport: The local port that received the request
+ * @fp: The request frame
+ *
+ * On success, the sequence pointer will be returned and also in fr_seq(@fp).
+ */
+static struct fc_seq *fc_seq_assign(struct fc_lport *lport, struct fc_frame *fp)
+{
+ struct fc_exch_mgr_anchor *ema;
+
+ WARN_ON(lport != fr_dev(fp));
+ WARN_ON(fr_seq(fp));
+ fr_seq(fp) = NULL;
+
+ list_for_each_entry(ema, &lport->ema_list, ema_list)
+ if ((!ema->match || ema->match(fp)) &&
+ fc_seq_lookup_recip(lport, ema->mp, fp) != FC_RJT_NONE)
+ break;
+ return fr_seq(fp);
+}
+
+/**
* fc_exch_recv_req() - Handler for an incoming request where is other
* end is originating the sequence
* @lport: The local port that received the request
@@ -2283,6 +2305,9 @@ int fc_exch_init(struct fc_lport *lport)
if (!lport->tt.seq_exch_abort)
lport->tt.seq_exch_abort = fc_seq_exch_abort;
+ if (!lport->tt.seq_assign)
+ lport->tt.seq_assign = fc_seq_assign;
+
return 0;
}
EXPORT_SYMBOL(fc_exch_init);
diff --git a/include/scsi/libfc.h b/include/scsi/libfc.h
index a6414ec..605f1d7 100644
--- a/include/scsi/libfc.h
+++ b/include/scsi/libfc.h
@@ -556,6 +556,13 @@ struct libfc_function_template {
struct fc_seq *(*seq_start_next)(struct fc_seq *);
/*
+ * Assign a sequence for an incoming request frame.
+ *
+ * STATUS: OPTIONAL
+ */
+ struct fc_seq *(*seq_assign)(struct fc_lport *, struct fc_frame *);
+
+ /*
* Reset an exchange manager, completing all sequences and exchanges.
* If s_id is non-zero, reset only exchanges originating from that FID.
* If d_id is non-zero, reset only exchanges sending to that FID.
--
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