Commit 1a5c2d7e authored by Joe Eykholt's avatar Joe Eykholt Committed by James Bottomley
Browse files

[SCSI] libfc: add method for setting handler for incoming exchange 



Add a method for setting handler for incoming exchange.
For multi-sequence exchanges, this allows the target driver
to add a response handler for handling subsequent sequences,
and exchange manager resets.

The new function is called fc_seq_set_resp().

Signed-off-by: default avatarJoe Eykholt <jeykholt@cisco.com>
Signed-off-by: default avatarRobert Love <robert.w.love@intel.com>
Signed-off-by: default avatarJames Bottomley <James.Bottomley@suse.de>
parent 96ad8464

drivers/scsi/libfc/fc_exch.c

+19 −0
Original line number Diff line number Diff line
@@ -558,6 +558,22 @@ static struct fc_seq *fc_seq_start_next(struct fc_seq *sp) 
	return sp;

}



/*

 * Set the response handler for the exchange associated with a sequence.

 */

static void fc_seq_set_resp(struct fc_seq *sp,

			    void (*resp)(struct fc_seq *, struct fc_frame *,

					 void *),

			    void *arg)

{

	struct fc_exch *ep = fc_seq_exch(sp);



	spin_lock_bh(&ep->ex_lock);

	ep->resp = resp;

	ep->arg = arg;

	spin_unlock_bh(&ep->ex_lock);

}



/**

 * fc_seq_exch_abort() - Abort an exchange and sequence

 * @req_sp:	The sequence to be aborted
@@ -2329,6 +2345,9 @@ int fc_exch_init(struct fc_lport *lport) 
	if (!lport->tt.seq_start_next)

		lport->tt.seq_start_next = fc_seq_start_next;



	if (!lport->tt.seq_set_resp)

		lport->tt.seq_set_resp = fc_seq_set_resp;



	if (!lport->tt.exch_seq_send)

		lport->tt.exch_seq_send = fc_exch_seq_send;

include/scsi/libfc.h

+10 −0
Original line number Diff line number Diff line
@@ -554,6 +554,16 @@ struct libfc_function_template { 
	 */

	struct fc_seq *(*seq_start_next)(struct fc_seq *);



	/*

	 * Set a response handler for the exchange of the sequence.

	 *

	 * STATUS: OPTIONAL

	 */

	void (*seq_set_resp)(struct fc_seq *sp,

			     void (*resp)(struct fc_seq *, struct fc_frame *,

					  void *),

			     void *arg);



	/*

	 * Assign a sequence for an incoming request frame.

	 *

CRA Git | Maintained and supported by SUSTech CRA and CCSE