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Diffstat (limited to 'src/spdk/lib/iscsi/task.c')
| -rw-r--r-- | src/spdk/lib/iscsi/task.c | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/src/spdk/lib/iscsi/task.c b/src/spdk/lib/iscsi/task.c new file mode 100644 index 000000000..964621178 --- /dev/null +++ b/src/spdk/lib/iscsi/task.c @@ -0,0 +1,98 @@ +/*- + * BSD LICENSE + * + * Copyright (C) 2008-2012 Daisuke Aoyama <aoyama@peach.ne.jp>. + * Copyright (c) Intel Corporation. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Intel Corporation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include "spdk/env.h" +#include "spdk/log.h" +#include "iscsi/conn.h" +#include "iscsi/task.h" + +static void +iscsi_task_free(struct spdk_scsi_task *scsi_task) +{ + struct spdk_iscsi_task *task = iscsi_task_from_scsi_task(scsi_task); + + if (task->parent) { + if (task->scsi.dxfer_dir == SPDK_SCSI_DIR_FROM_DEV) { + assert(task->conn->data_in_cnt > 0); + task->conn->data_in_cnt--; + } + + spdk_scsi_task_put(&task->parent->scsi); + task->parent = NULL; + } + + iscsi_task_disassociate_pdu(task); + assert(task->conn->pending_task_cnt > 0); + task->conn->pending_task_cnt--; + spdk_mempool_put(g_iscsi.task_pool, (void *)task); +} + +struct spdk_iscsi_task * +iscsi_task_get(struct spdk_iscsi_conn *conn, struct spdk_iscsi_task *parent, + spdk_scsi_task_cpl cpl_fn) +{ + struct spdk_iscsi_task *task; + + task = spdk_mempool_get(g_iscsi.task_pool); + if (!task) { + SPDK_ERRLOG("Unable to get task\n"); + abort(); + } + + assert(conn != NULL); + memset(task, 0, sizeof(*task)); + task->conn = conn; + assert(conn->pending_task_cnt < UINT32_MAX); + conn->pending_task_cnt++; + spdk_scsi_task_construct(&task->scsi, + cpl_fn, + iscsi_task_free); + if (parent) { + parent->scsi.ref++; + task->parent = parent; + task->tag = parent->tag; + task->lun_id = parent->lun_id; + task->scsi.dxfer_dir = parent->scsi.dxfer_dir; + task->scsi.transfer_len = parent->scsi.transfer_len; + task->scsi.lun = parent->scsi.lun; + task->scsi.cdb = parent->scsi.cdb; + task->scsi.target_port = parent->scsi.target_port; + task->scsi.initiator_port = parent->scsi.initiator_port; + if (task->scsi.dxfer_dir == SPDK_SCSI_DIR_FROM_DEV) { + conn->data_in_cnt++; + } + } + + return task; +} |