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-rw-r--r--src/spdk/lib/iscsi/task.c98
1 files changed, 98 insertions, 0 deletions
diff --git a/src/spdk/lib/iscsi/task.c b/src/spdk/lib/iscsi/task.c
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+++ b/src/spdk/lib/iscsi/task.c
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+/*-
+ * 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;
+}