[SCSI] iscsi: convert xmit path to iscsi chunks
Convert xmit to iscsi chunks.
from michaelc@cs.wisc.edu:
Bug fixes, more digest integration, sg chaining conversion and other
sg wrapper changes, coding style sync up, and removal of io fields,
like pdu_sent, that are not needed.
Signed-off-by: Olaf Kirch <olaf.kirch@oracle.com>
Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
diff --git a/drivers/scsi/libiscsi.c b/drivers/scsi/libiscsi.c
index b0bc8c3..f15df8d 100644
--- a/drivers/scsi/libiscsi.c
+++ b/drivers/scsi/libiscsi.c
@@ -156,20 +156,19 @@
rc = iscsi_add_hdr(ctask, sizeof(*hdr));
if (rc)
return rc;
- hdr->opcode = ISCSI_OP_SCSI_CMD;
- hdr->flags = ISCSI_ATTR_SIMPLE;
- int_to_scsilun(sc->device->lun, (struct scsi_lun *)hdr->lun);
- hdr->itt = build_itt(ctask->itt, conn->id, session->age);
- hdr->data_length = cpu_to_be32(scsi_bufflen(sc));
- hdr->cmdsn = cpu_to_be32(session->cmdsn);
- session->cmdsn++;
- hdr->exp_statsn = cpu_to_be32(conn->exp_statsn);
- memcpy(hdr->cdb, sc->cmnd, sc->cmd_len);
+ hdr->opcode = ISCSI_OP_SCSI_CMD;
+ hdr->flags = ISCSI_ATTR_SIMPLE;
+ int_to_scsilun(sc->device->lun, (struct scsi_lun *)hdr->lun);
+ hdr->itt = build_itt(ctask->itt, conn->id, session->age);
+ hdr->data_length = cpu_to_be32(scsi_bufflen(sc));
+ hdr->cmdsn = cpu_to_be32(session->cmdsn);
+ session->cmdsn++;
+ hdr->exp_statsn = cpu_to_be32(conn->exp_statsn);
+ memcpy(hdr->cdb, sc->cmnd, sc->cmd_len);
if (sc->cmd_len < MAX_COMMAND_SIZE)
memset(&hdr->cdb[sc->cmd_len], 0,
MAX_COMMAND_SIZE - sc->cmd_len);
- ctask->data_count = 0;
ctask->imm_count = 0;
if (sc->sc_data_direction == DMA_TO_DEVICE) {
hdr->flags |= ISCSI_FLAG_CMD_WRITE;
@@ -198,9 +197,9 @@
else
ctask->imm_count = min(scsi_bufflen(sc),
conn->max_xmit_dlength);
- hton24(ctask->hdr->dlength, ctask->imm_count);
+ hton24(hdr->dlength, ctask->imm_count);
} else
- zero_data(ctask->hdr->dlength);
+ zero_data(hdr->dlength);
if (!session->initial_r2t_en) {
ctask->unsol_count = min((session->first_burst),
@@ -210,7 +209,7 @@
if (!ctask->unsol_count)
/* No unsolicit Data-Out's */
- ctask->hdr->flags |= ISCSI_FLAG_CMD_FINAL;
+ hdr->flags |= ISCSI_FLAG_CMD_FINAL;
} else {
hdr->flags |= ISCSI_FLAG_CMD_FINAL;
zero_data(hdr->dlength);
@@ -228,13 +227,15 @@
WARN_ON(hdrlength >= 256);
hdr->hlength = hdrlength & 0xFF;
- conn->scsicmd_pdus_cnt++;
+ if (conn->session->tt->init_cmd_task(conn->ctask))
+ return EIO;
- debug_scsi("iscsi prep [%s cid %d sc %p cdb 0x%x itt 0x%x len %d "
+ conn->scsicmd_pdus_cnt++;
+ debug_scsi("iscsi prep [%s cid %d sc %p cdb 0x%x itt 0x%x len %d "
"cmdsn %d win %d]\n",
- sc->sc_data_direction == DMA_TO_DEVICE ? "write" : "read",
+ sc->sc_data_direction == DMA_TO_DEVICE ? "write" : "read",
conn->id, sc, sc->cmnd[0], ctask->itt, scsi_bufflen(sc),
- session->cmdsn, session->max_cmdsn - session->exp_cmdsn + 1);
+ session->cmdsn, session->max_cmdsn - session->exp_cmdsn + 1);
return 0;
}
@@ -927,7 +928,7 @@
fail_command(conn, conn->ctask, DID_ABORT << 16);
continue;
}
- conn->session->tt->init_cmd_task(conn->ctask);
+
conn->ctask->state = ISCSI_TASK_RUNNING;
list_move_tail(conn->xmitqueue.next, &conn->run_list);
rc = iscsi_xmit_ctask(conn);