1 /* SPDX-License-Identifier: BSD-3-Clause 2 * Copyright (C) 2008-2012 Daisuke Aoyama <aoyama@peach.ne.jp>. 3 * Copyright (C) 2016 Intel Corporation. 4 * All rights reserved. 5 */ 6 7 #include "spdk/env.h" 8 #include "spdk/log.h" 9 #include "iscsi/conn.h" 10 #include "iscsi/task.h" 11 12 static void 13 iscsi_task_free(struct spdk_scsi_task *scsi_task) 14 { 15 struct spdk_iscsi_task *task = iscsi_task_from_scsi_task(scsi_task); 16 17 if (task->parent) { 18 if (task->scsi.dxfer_dir == SPDK_SCSI_DIR_FROM_DEV) { 19 assert(task->conn->data_in_cnt > 0); 20 task->conn->data_in_cnt--; 21 } 22 23 spdk_scsi_task_put(&task->parent->scsi); 24 task->parent = NULL; 25 } 26 27 if (iscsi_task_get_mobj(task)) { 28 iscsi_datapool_put(iscsi_task_get_mobj(task)); 29 } 30 31 iscsi_task_disassociate_pdu(task); 32 assert(task->conn->pending_task_cnt > 0); 33 task->conn->pending_task_cnt--; 34 spdk_mempool_put(g_iscsi.task_pool, (void *)task); 35 } 36 37 struct spdk_iscsi_task * 38 iscsi_task_get(struct spdk_iscsi_conn *conn, struct spdk_iscsi_task *parent, 39 spdk_scsi_task_cpl cpl_fn) 40 { 41 struct spdk_iscsi_task *task; 42 43 task = spdk_mempool_get(g_iscsi.task_pool); 44 if (!task) { 45 SPDK_ERRLOG("Unable to get task\n"); 46 abort(); 47 } 48 49 assert(conn != NULL); 50 memset(task, 0, sizeof(*task)); 51 task->conn = conn; 52 assert(conn->pending_task_cnt < UINT32_MAX); 53 conn->pending_task_cnt++; 54 spdk_scsi_task_construct(&task->scsi, 55 cpl_fn, 56 iscsi_task_free); 57 if (parent) { 58 parent->scsi.ref++; 59 task->parent = parent; 60 task->tag = parent->tag; 61 task->lun_id = parent->lun_id; 62 task->scsi.dxfer_dir = parent->scsi.dxfer_dir; 63 task->scsi.transfer_len = parent->scsi.transfer_len; 64 task->scsi.lun = parent->scsi.lun; 65 task->scsi.cdb = parent->scsi.cdb; 66 task->scsi.target_port = parent->scsi.target_port; 67 task->scsi.initiator_port = parent->scsi.initiator_port; 68 if (task->scsi.dxfer_dir == SPDK_SCSI_DIR_FROM_DEV) { 69 conn->data_in_cnt++; 70 } 71 } 72 73 return task; 74 } 75