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Diffstat (limited to 'src/spdk/lib/iscsi/task.h')
| -rw-r--r-- | src/spdk/lib/iscsi/task.h | 187 |
1 files changed, 187 insertions, 0 deletions
diff --git a/src/spdk/lib/iscsi/task.h b/src/spdk/lib/iscsi/task.h new file mode 100644 index 00000000..fea928ac --- /dev/null +++ b/src/spdk/lib/iscsi/task.h @@ -0,0 +1,187 @@ +/*- + * 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. + */ + +#ifndef SPDK_ISCSI_TASK_H +#define SPDK_ISCSI_TASK_H + +#include "iscsi/iscsi.h" +#include "spdk/scsi.h" +#include "spdk/util.h" + +struct spdk_iscsi_task { + struct spdk_scsi_task scsi; + + struct spdk_iscsi_task *parent; + + struct spdk_iscsi_conn *conn; + struct spdk_iscsi_pdu *pdu; + uint32_t outstanding_r2t; + + uint32_t desired_data_transfer_length; + + /* Only valid for Read/Write */ + uint32_t bytes_completed; + + uint32_t data_out_cnt; + + /* + * Tracks the current offset of large read io. + */ + uint32_t current_datain_offset; + + /* + * next_expected_r2t_offset is used when we receive + * the DataOUT PDU. + */ + uint32_t next_expected_r2t_offset; + + /* + * Tracks the length of the R2T that is in progress. + * Used to check that an R2T burst does not exceed + * MaxBurstLength. + */ + uint32_t current_r2t_length; + + /* + * next_r2t_offset is used when we are sending the + * R2T packet to keep track of next offset of r2t. + */ + uint32_t next_r2t_offset; + uint32_t R2TSN; + uint32_t r2t_datasn; /* record next datasn for a r2tsn */ + uint32_t acked_r2tsn; /* next r2tsn to be acked */ + uint32_t datain_datasn; + uint32_t acked_data_sn; /* next expected datain datasn */ + uint32_t ttt; + + uint32_t tag; + + /** + * Record the lun id just in case the lun is invalid, + * which will happen when hot removing the lun. + */ + int lun_id; + + TAILQ_ENTRY(spdk_iscsi_task) link; + + TAILQ_HEAD(subtask_list, spdk_iscsi_task) subtask_list; + TAILQ_ENTRY(spdk_iscsi_task) subtask_link; + bool is_queued; /* is queued in scsi layer for handling */ +}; + +static inline void +spdk_iscsi_task_put(struct spdk_iscsi_task *task) +{ + spdk_scsi_task_put(&task->scsi); +} + +static inline struct spdk_iscsi_pdu * +spdk_iscsi_task_get_pdu(struct spdk_iscsi_task *task) +{ + return task->pdu; +} + +static inline void +spdk_iscsi_task_set_pdu(struct spdk_iscsi_task *task, struct spdk_iscsi_pdu *pdu) +{ + task->pdu = pdu; +} + +static inline struct iscsi_bhs * +spdk_iscsi_task_get_bhs(struct spdk_iscsi_task *task) +{ + return &spdk_iscsi_task_get_pdu(task)->bhs; +} + +static inline void +spdk_iscsi_task_associate_pdu(struct spdk_iscsi_task *task, struct spdk_iscsi_pdu *pdu) +{ + spdk_iscsi_task_set_pdu(task, pdu); + pdu->ref++; +} + +static inline void +spdk_iscsi_task_disassociate_pdu(struct spdk_iscsi_task *task) +{ + if (spdk_iscsi_task_get_pdu(task)) { + spdk_put_pdu(spdk_iscsi_task_get_pdu(task)); + spdk_iscsi_task_set_pdu(task, NULL); + } +} + +static inline int +spdk_iscsi_task_is_immediate(struct spdk_iscsi_task *task) +{ + struct iscsi_bhs_scsi_req *scsi_req; + + scsi_req = (struct iscsi_bhs_scsi_req *)spdk_iscsi_task_get_bhs(task); + return (scsi_req->immediate == 1); +} + +static inline int +spdk_iscsi_task_is_read(struct spdk_iscsi_task *task) +{ + struct iscsi_bhs_scsi_req *scsi_req; + + scsi_req = (struct iscsi_bhs_scsi_req *)spdk_iscsi_task_get_bhs(task); + return (scsi_req->read_bit == 1); +} + +static inline uint32_t +spdk_iscsi_task_get_cmdsn(struct spdk_iscsi_task *task) +{ + return spdk_iscsi_task_get_pdu(task)->cmd_sn; +} + +struct spdk_iscsi_task *spdk_iscsi_task_get(struct spdk_iscsi_conn *conn, + struct spdk_iscsi_task *parent, + spdk_scsi_task_cpl cpl_fn); + +static inline struct spdk_iscsi_task * +spdk_iscsi_task_from_scsi_task(struct spdk_scsi_task *task) +{ + return SPDK_CONTAINEROF(task, struct spdk_iscsi_task, scsi); +} + +static inline struct spdk_iscsi_task * +spdk_iscsi_task_get_primary(struct spdk_iscsi_task *task) +{ + if (task->parent) { + return task->parent; + } else { + return task; + } +} + +#endif /* SPDK_ISCSI_TASK_H */ |