1 /*- 2 * BSD LICENSE 3 * 4 * Copyright (C) 2008-2012 Daisuke Aoyama <aoyama@peach.ne.jp>. 5 * Copyright (c) Intel Corporation. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 12 * * Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * * Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in 16 * the documentation and/or other materials provided with the 17 * distribution. 18 * * Neither the name of Intel Corporation nor the names of its 19 * contributors may be used to endorse or promote products derived 20 * from this software without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 23 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 24 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 25 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 26 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 27 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 28 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 29 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 30 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 31 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 32 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 33 */ 34 35 #include "spdk/env.h" 36 #include "spdk/log.h" 37 #include "iscsi/conn.h" 38 #include "iscsi/task.h" 39 40 static void 41 iscsi_task_free(struct spdk_scsi_task *scsi_task) 42 { 43 struct spdk_iscsi_task *task = iscsi_task_from_scsi_task(scsi_task); 44 45 if (task->parent) { 46 if (task->scsi.dxfer_dir == SPDK_SCSI_DIR_FROM_DEV) { 47 assert(task->conn->data_in_cnt > 0); 48 task->conn->data_in_cnt--; 49 } 50 51 spdk_scsi_task_put(&task->parent->scsi); 52 task->parent = NULL; 53 } 54 55 iscsi_task_disassociate_pdu(task); 56 assert(task->conn->pending_task_cnt > 0); 57 task->conn->pending_task_cnt--; 58 spdk_mempool_put(g_iscsi.task_pool, (void *)task); 59 } 60 61 struct spdk_iscsi_task * 62 iscsi_task_get(struct spdk_iscsi_conn *conn, struct spdk_iscsi_task *parent, 63 spdk_scsi_task_cpl cpl_fn) 64 { 65 struct spdk_iscsi_task *task; 66 67 task = spdk_mempool_get(g_iscsi.task_pool); 68 if (!task) { 69 SPDK_ERRLOG("Unable to get task\n"); 70 abort(); 71 } 72 73 assert(conn != NULL); 74 memset(task, 0, sizeof(*task)); 75 task->conn = conn; 76 assert(conn->pending_task_cnt < UINT32_MAX); 77 conn->pending_task_cnt++; 78 spdk_scsi_task_construct(&task->scsi, 79 cpl_fn, 80 iscsi_task_free); 81 if (parent) { 82 parent->scsi.ref++; 83 task->parent = parent; 84 task->tag = parent->tag; 85 task->lun_id = parent->lun_id; 86 task->scsi.dxfer_dir = parent->scsi.dxfer_dir; 87 task->scsi.transfer_len = parent->scsi.transfer_len; 88 task->scsi.lun = parent->scsi.lun; 89 task->scsi.cdb = parent->scsi.cdb; 90 task->scsi.target_port = parent->scsi.target_port; 91 task->scsi.initiator_port = parent->scsi.initiator_port; 92 if (task->scsi.dxfer_dir == SPDK_SCSI_DIR_FROM_DEV) { 93 conn->data_in_cnt++; 94 } 95 } 96 97 return task; 98 } 99