Commit 9637e17d authored by Changpeng Liu's avatar Changpeng Liu
Browse files

iscsi: reserve value 0xffffffff for TTT in R2T 



According to RFC3720 10.8.5, value 0xffffffff is reserved
for Target Transfer Tag when sending an R2T to initiator.

Change-Id: I0d92539d7640d3a4ffc5f8452cfe16f34269e7d0
Signed-off-by: default avatarChangpeng Liu <changpeng.liu@intel.com>
Reviewed-on: https://review.gerrithub.io/425369


Reviewed-by: default avatarShuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Reviewed-by: default avatarJim Harris <james.r.harris@intel.com>
Reviewed-by: default avatarBen Walker <benjamin.walker@intel.com>
Tested-by: default avatarSPDK CI Jenkins <sys_sgci@intel.com>
Chandler-Test-Pool: SPDK Automated Test System <sys_sgsw@intel.com>
parent 6c391ec2

lib/iscsi/iscsi.c

+7 −1
Original line number Diff line number Diff line
@@ -3398,7 +3398,13 @@ spdk_add_transfer_task(struct spdk_iscsi_conn *conn, 
	task->next_expected_r2t_offset = data_len;

	task->current_r2t_length = 0;

	task->R2TSN = 0;

	task->ttt = ++conn->ttt;

	/* According to RFC3720 10.8.5, 0xffffffff is

	 * reserved for TTT in R2T.

	 */

	if (++conn->ttt == 0xffffffffu) {

		conn->ttt = 0;

	}

	task->ttt = conn->ttt;



	while (data_len != transfer_len) {

		len = DMIN32(max_burst_len, (transfer_len - data_len));