From d77e65350f2d82dfa0557707d505711f5a43c8fd Mon Sep 17 00:00:00 2001 From: Sagi Grimberg Date: Wed, 11 Jun 2014 12:09:58 +0300 Subject: libiscsi, iser: Adjust data_length to include protection information In case protection information exists over the wire iscsi header data length is required to include it. Use protection information aware scsi helpers to set the correct transfer length. In order to avoid breakage, remove iser transfer length checks for each task as they are not always true and somewhat redundant anyway. Signed-off-by: Sagi Grimberg Reviewed-by: Mike Christie Acked-by: Mike Christie Cc: stable@vger.kernel.org # 3.15+ Signed-off-by: Nicholas Bellinger --- drivers/scsi/libiscsi.c | 18 +++++++++--------- 1 file changed, 9 insertions(+), 9 deletions(-) (limited to 'drivers/scsi/libiscsi.c') diff --git a/drivers/scsi/libiscsi.c b/drivers/scsi/libiscsi.c index 26dc005bb0f0..3f462349b16c 100644 --- a/drivers/scsi/libiscsi.c +++ b/drivers/scsi/libiscsi.c @@ -338,7 +338,7 @@ static int iscsi_prep_scsi_cmd_pdu(struct iscsi_task *task) struct iscsi_session *session = conn->session; struct scsi_cmnd *sc = task->sc; struct iscsi_scsi_req *hdr; - unsigned hdrlength, cmd_len; + unsigned hdrlength, cmd_len, transfer_length; itt_t itt; int rc; @@ -391,11 +391,11 @@ static int iscsi_prep_scsi_cmd_pdu(struct iscsi_task *task) if (scsi_get_prot_op(sc) != SCSI_PROT_NORMAL) task->protected = true; + transfer_length = scsi_transfer_length(sc); + hdr->data_length = cpu_to_be32(transfer_length); if (sc->sc_data_direction == DMA_TO_DEVICE) { - unsigned out_len = scsi_out(sc)->length; struct iscsi_r2t_info *r2t = &task->unsol_r2t; - hdr->data_length = cpu_to_be32(out_len); hdr->flags |= ISCSI_FLAG_CMD_WRITE; /* * Write counters: @@ -414,18 +414,19 @@ static int iscsi_prep_scsi_cmd_pdu(struct iscsi_task *task) memset(r2t, 0, sizeof(*r2t)); if (session->imm_data_en) { - if (out_len >= session->first_burst) + if (transfer_length >= session->first_burst) task->imm_count = min(session->first_burst, conn->max_xmit_dlength); else - task->imm_count = min(out_len, - conn->max_xmit_dlength); + task->imm_count = min(transfer_length, + conn->max_xmit_dlength); hton24(hdr->dlength, task->imm_count); } else zero_data(hdr->dlength); if (!session->initial_r2t_en) { - r2t->data_length = min(session->first_burst, out_len) - + r2t->data_length = min(session->first_burst, + transfer_length) - task->imm_count; r2t->data_offset = task->imm_count; r2t->ttt = cpu_to_be32(ISCSI_RESERVED_TAG); @@ -438,7 +439,6 @@ static int iscsi_prep_scsi_cmd_pdu(struct iscsi_task *task) } else { hdr->flags |= ISCSI_FLAG_CMD_FINAL; zero_data(hdr->dlength); - hdr->data_length = cpu_to_be32(scsi_in(sc)->length); if (sc->sc_data_direction == DMA_FROM_DEVICE) hdr->flags |= ISCSI_FLAG_CMD_READ; @@ -466,7 +466,7 @@ static int iscsi_prep_scsi_cmd_pdu(struct iscsi_task *task) scsi_bidi_cmnd(sc) ? "bidirectional" : sc->sc_data_direction == DMA_TO_DEVICE ? "write" : "read", conn->id, sc, sc->cmnd[0], - task->itt, scsi_bufflen(sc), + task->itt, transfer_length, scsi_bidi_cmnd(sc) ? scsi_in(sc)->length : 0, session->cmdsn, session->max_cmdsn - session->exp_cmdsn + 1); -- cgit 1.4.1