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 #include "iscsi/tgt_node.h" 12 13 static void 14 iscsi_task_free(struct spdk_scsi_task *scsi_task) 15 { 16 uint64_t tsc_diff; 17 struct spdk_iscsi_task *task = iscsi_task_from_scsi_task(scsi_task); 18 19 if (task->conn->target->histogram) { 20 tsc_diff = spdk_get_ticks() - task->start_tsc; 21 spdk_histogram_data_tally(task->conn->target->histogram, tsc_diff); 22 } 23 24 if (task->parent) { 25 if (task->scsi.dxfer_dir == SPDK_SCSI_DIR_FROM_DEV) { 26 assert(task->conn->data_in_cnt > 0); 27 task->conn->data_in_cnt--; 28 } 29 30 spdk_scsi_task_put(&task->parent->scsi); 31 task->parent = NULL; 32 } 33 34 if (iscsi_task_get_mobj(task)) { 35 iscsi_datapool_put(iscsi_task_get_mobj(task)); 36 } 37 38 iscsi_task_disassociate_pdu(task); 39 assert(task->conn->pending_task_cnt > 0); 40 task->conn->pending_task_cnt--; 41 spdk_mempool_put(g_iscsi.task_pool, (void *)task); 42 } 43 44 struct spdk_iscsi_task * 45 iscsi_task_get(struct spdk_iscsi_conn *conn, struct spdk_iscsi_task *parent, 46 spdk_scsi_task_cpl cpl_fn) 47 { 48 struct spdk_iscsi_task *task; 49 50 task = spdk_mempool_get(g_iscsi.task_pool); 51 if (!task) { 52 SPDK_ERRLOG("Unable to get task\n"); 53 abort(); 54 } 55 56 assert(conn != NULL); 57 memset(task, 0, sizeof(*task)); 58 task->start_tsc = spdk_get_ticks(); 59 task->conn = conn; 60 assert(conn->pending_task_cnt < UINT32_MAX); 61 conn->pending_task_cnt++; 62 spdk_scsi_task_construct(&task->scsi, 63 cpl_fn, 64 iscsi_task_free); 65 if (parent) { 66 parent->scsi.ref++; 67 task->parent = parent; 68 task->tag = parent->tag; 69 task->lun_id = parent->lun_id; 70 task->scsi.dxfer_dir = parent->scsi.dxfer_dir; 71 task->scsi.transfer_len = parent->scsi.transfer_len; 72 task->scsi.lun = parent->scsi.lun; 73 task->scsi.cdb = parent->scsi.cdb; 74 task->scsi.target_port = parent->scsi.target_port; 75 task->scsi.initiator_port = parent->scsi.initiator_port; 76 if (task->scsi.dxfer_dir == SPDK_SCSI_DIR_FROM_DEV) { 77 conn->data_in_cnt++; 78 } 79 } 80 81 return task; 82 } 83