From d77e65350f2d82dfa0557707d505711f5a43c8fd Mon Sep 17 00:00:00 2001 From: Sagi Grimberg Date: Wed, 11 Jun 2014 12:09:58 +0300 Subject: [PATCH] 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/infiniband/ulp/iser/iser_initiator.c | 34 ++++++-------------- drivers/scsi/libiscsi.c | 18 +++++------ 2 files changed, 19 insertions(+), 33 deletions(-) diff --git a/drivers/infiniband/ulp/iser/iser_initiator.c b/drivers/infiniband/ulp/iser/iser_initiator.c index 2e2d903db838..8d44a4060634 100644 --- a/drivers/infiniband/ulp/iser/iser_initiator.c +++ b/drivers/infiniband/ulp/iser/iser_initiator.c @@ -41,11 +41,11 @@ #include "iscsi_iser.h" /* Register user buffer memory and initialize passive rdma - * dto descriptor. Total data size is stored in - * iser_task->data[ISER_DIR_IN].data_len + * dto descriptor. Data size is stored in + * task->data[ISER_DIR_IN].data_len, Protection size + * os stored in task->prot[ISER_DIR_IN].data_len */ -static int iser_prepare_read_cmd(struct iscsi_task *task, - unsigned int edtl) +static int iser_prepare_read_cmd(struct iscsi_task *task) { struct iscsi_iser_task *iser_task = task->dd_data; @@ -73,14 +73,6 @@ static int iser_prepare_read_cmd(struct iscsi_task *task, return err; } - if (edtl > iser_task->data[ISER_DIR_IN].data_len) { - iser_err("Total data length: %ld, less than EDTL: " - "%d, in READ cmd BHS itt: %d, conn: 0x%p\n", - iser_task->data[ISER_DIR_IN].data_len, edtl, - task->itt, iser_task->ib_conn); - return -EINVAL; - } - err = device->iser_reg_rdma_mem(iser_task, ISER_DIR_IN); if (err) { iser_err("Failed to set up Data-IN RDMA\n"); @@ -100,8 +92,9 @@ static int iser_prepare_read_cmd(struct iscsi_task *task, } /* Register user buffer memory and initialize passive rdma - * dto descriptor. Total data size is stored in - * task->data[ISER_DIR_OUT].data_len + * dto descriptor. Data size is stored in + * task->data[ISER_DIR_OUT].data_len, Protection size + * is stored at task->prot[ISER_DIR_OUT].data_len */ static int iser_prepare_write_cmd(struct iscsi_task *task, @@ -135,14 +128,6 @@ iser_prepare_write_cmd(struct iscsi_task *task, return err; } - if (edtl > iser_task->data[ISER_DIR_OUT].data_len) { - iser_err("Total data length: %ld, less than EDTL: %d, " - "in WRITE cmd BHS itt: %d, conn: 0x%p\n", - iser_task->data[ISER_DIR_OUT].data_len, - edtl, task->itt, task->conn); - return -EINVAL; - } - err = device->iser_reg_rdma_mem(iser_task, ISER_DIR_OUT); if (err != 0) { iser_err("Failed to register write cmd RDMA mem\n"); @@ -417,11 +402,12 @@ int iser_send_command(struct iscsi_conn *conn, if (scsi_prot_sg_count(sc)) { prot_buf->buf = scsi_prot_sglist(sc); prot_buf->size = scsi_prot_sg_count(sc); - prot_buf->data_len = sc->prot_sdb->length; + prot_buf->data_len = data_buf->data_len >> + ilog2(sc->device->sector_size) * 8; } if (hdr->flags & ISCSI_FLAG_CMD_READ) { - err = iser_prepare_read_cmd(task, edtl); + err = iser_prepare_read_cmd(task); if (err) goto send_command_error; } 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);