diff options
Diffstat (limited to 'drivers/target/target_core_transport.c')
| -rw-r--r-- | drivers/target/target_core_transport.c | 84 |
1 files changed, 52 insertions, 32 deletions
diff --git a/drivers/target/target_core_transport.c b/drivers/target/target_core_transport.c index 836d552b0385..58caacd54a3b 100644 --- a/drivers/target/target_core_transport.c +++ b/drivers/target/target_core_transport.c @@ -67,7 +67,6 @@ static void transport_complete_task_attr(struct se_cmd *cmd); static int translate_sense_reason(struct se_cmd *cmd, sense_reason_t reason); static void transport_handle_queue_full(struct se_cmd *cmd, struct se_device *dev, int err, bool write_pending); -static int transport_put_cmd(struct se_cmd *cmd); static void target_complete_ok_work(struct work_struct *work); int init_se_kmem_caches(void) @@ -668,7 +667,7 @@ int transport_cmd_finish_abort(struct se_cmd *cmd, int remove) if (transport_cmd_check_stop_to_fabric(cmd)) return 1; if (remove && ack_kref) - ret = transport_put_cmd(cmd); + ret = target_put_sess_cmd(cmd); return ret; } @@ -1730,9 +1729,6 @@ void transport_generic_request_failure(struct se_cmd *cmd, { int ret = 0, post_ret = 0; - if (transport_check_aborted_status(cmd, 1)) - return; - pr_debug("-----[ Storage Engine Exception; sense_reason %d\n", sense_reason); target_show_cmd("-----[ ", cmd); @@ -1741,6 +1737,7 @@ void transport_generic_request_failure(struct se_cmd *cmd, * For SAM Task Attribute emulation for failed struct se_cmd */ transport_complete_task_attr(cmd); + /* * Handle special case for COMPARE_AND_WRITE failure, where the * callback is expected to drop the per device ->caw_sem. @@ -1749,6 +1746,9 @@ void transport_generic_request_failure(struct se_cmd *cmd, cmd->transport_complete_callback) cmd->transport_complete_callback(cmd, false, &post_ret); + if (transport_check_aborted_status(cmd, 1)) + return; + switch (sense_reason) { case TCM_NON_EXISTENT_LUN: case TCM_UNSUPPORTED_SCSI_OPCODE: @@ -1772,8 +1772,8 @@ void transport_generic_request_failure(struct se_cmd *cmd, case TCM_UNSUPPORTED_SEGMENT_DESC_TYPE_CODE: break; case TCM_OUT_OF_RESOURCES: - sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; - break; + cmd->scsi_status = SAM_STAT_TASK_SET_FULL; + goto queue_status; case TCM_RESERVATION_CONFLICT: /* * No SENSE Data payload for this case, set SCSI Status @@ -1795,11 +1795,8 @@ void transport_generic_request_failure(struct se_cmd *cmd, cmd->orig_fe_lun, 0x2C, ASCQ_2CH_PREVIOUS_RESERVATION_CONFLICT_STATUS); } - trace_target_cmd_complete(cmd); - ret = cmd->se_tfo->queue_status(cmd); - if (ret) - goto queue_full; - goto check_stop; + + goto queue_status; default: pr_err("Unknown transport error for CDB 0x%02x: %d\n", cmd->t_task_cdb[0], sense_reason); @@ -1816,6 +1813,11 @@ check_stop: transport_cmd_check_stop_to_fabric(cmd); return; +queue_status: + trace_target_cmd_complete(cmd); + ret = cmd->se_tfo->queue_status(cmd); + if (!ret) + goto check_stop; queue_full: transport_handle_queue_full(cmd, cmd->se_dev, ret, false); } @@ -1973,6 +1975,7 @@ void target_execute_cmd(struct se_cmd *cmd) } cmd->t_state = TRANSPORT_PROCESSING; + cmd->transport_state &= ~CMD_T_PRE_EXECUTE; cmd->transport_state |= CMD_T_ACTIVE | CMD_T_SENT; spin_unlock_irq(&cmd->t_state_lock); @@ -2010,6 +2013,8 @@ static void target_restart_delayed_cmds(struct se_device *dev) list_del(&cmd->se_delayed_node); spin_unlock(&dev->delayed_cmd_lock); + cmd->transport_state |= CMD_T_SENT; + __target_execute_cmd(cmd, true); if (cmd->sam_task_attr == TCM_ORDERED_TAG) @@ -2045,6 +2050,8 @@ static void transport_complete_task_attr(struct se_cmd *cmd) pr_debug("Incremented dev_cur_ordered_id: %u for ORDERED\n", dev->dev_cur_ordered_id); } + cmd->se_cmd_flags &= ~SCF_TASK_ATTR_SET; + restart: target_restart_delayed_cmds(dev); } @@ -2090,7 +2097,7 @@ static void transport_complete_qf(struct se_cmd *cmd) ret = cmd->se_tfo->queue_data_in(cmd); break; } - /* Fall through for DMA_TO_DEVICE */ + /* fall through */ case DMA_NONE: queue_status: trace_target_cmd_complete(cmd); @@ -2268,7 +2275,7 @@ queue_rsp: goto queue_full; break; } - /* Fall through for DMA_TO_DEVICE */ + /* fall through */ case DMA_NONE: queue_status: trace_target_cmd_complete(cmd); @@ -2352,22 +2359,6 @@ static inline void transport_free_pages(struct se_cmd *cmd) cmd->t_bidi_data_nents = 0; } -/** - * transport_put_cmd - release a reference to a command - * @cmd: command to release - * - * This routine releases our reference to the command and frees it if possible. - */ -static int transport_put_cmd(struct se_cmd *cmd) -{ - BUG_ON(!cmd->se_tfo); - /* - * If this cmd has been setup with target_get_sess_cmd(), drop - * the kref and call ->release_cmd() in kref callback. - */ - return target_put_sess_cmd(cmd); -} - void *transport_kmap_data_sg(struct se_cmd *cmd) { struct scatterlist *sg = cmd->t_data_sg; @@ -2570,7 +2561,20 @@ EXPORT_SYMBOL(transport_generic_new_cmd); static void transport_write_pending_qf(struct se_cmd *cmd) { + unsigned long flags; int ret; + bool stop; + + spin_lock_irqsave(&cmd->t_state_lock, flags); + stop = (cmd->transport_state & (CMD_T_STOP | CMD_T_ABORTED)); + spin_unlock_irqrestore(&cmd->t_state_lock, flags); + + if (stop) { + pr_debug("%s:%d CMD_T_STOP|CMD_T_ABORTED for ITT: 0x%08llx\n", + __func__, __LINE__, cmd->tag); + complete_all(&cmd->t_transport_stop_comp); + return; + } ret = cmd->se_tfo->write_pending(cmd); if (ret) { @@ -2603,7 +2607,7 @@ int transport_generic_free_cmd(struct se_cmd *cmd, int wait_for_tasks) target_wait_free_cmd(cmd, &aborted, &tas); if (!aborted || tas) - ret = transport_put_cmd(cmd); + ret = target_put_sess_cmd(cmd); } else { if (wait_for_tasks) target_wait_free_cmd(cmd, &aborted, &tas); @@ -2619,7 +2623,7 @@ int transport_generic_free_cmd(struct se_cmd *cmd, int wait_for_tasks) transport_lun_remove_cmd(cmd); if (!aborted || tas) - ret = transport_put_cmd(cmd); + ret = target_put_sess_cmd(cmd); } /* * If the task has been internally aborted due to TMR ABORT_TASK @@ -2664,6 +2668,7 @@ int target_get_sess_cmd(struct se_cmd *se_cmd, bool ack_kref) ret = -ESHUTDOWN; goto out; } + se_cmd->transport_state |= CMD_T_PRE_EXECUTE; list_add_tail(&se_cmd->se_cmd_list, &se_sess->sess_cmd_list); out: spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags); @@ -3145,6 +3150,21 @@ static const struct sense_info sense_info_table[] = { .key = NOT_READY, .asc = 0x08, /* LOGICAL UNIT COMMUNICATION FAILURE */ }, + [TCM_INSUFFICIENT_REGISTRATION_RESOURCES] = { + /* + * From spc4r22 section5.7.7,5.7.8 + * If a PERSISTENT RESERVE OUT command with a REGISTER service action + * or a REGISTER AND IGNORE EXISTING KEY service action or + * REGISTER AND MOVE service actionis attempted, + * but there are insufficient device server resources to complete the + * operation, then the command shall be terminated with CHECK CONDITION + * status, with the sense key set to ILLEGAL REQUEST,and the additonal + * sense code set to INSUFFICIENT REGISTRATION RESOURCES. + */ + .key = ILLEGAL_REQUEST, + .asc = 0x55, + .ascq = 0x04, /* INSUFFICIENT REGISTRATION RESOURCES */ + }, }; static int translate_sense_reason(struct se_cmd *cmd, sense_reason_t reason) |