From 03e98c9eb916f3f0868c1dc344dde2a60287ff72 Mon Sep 17 00:00:00 2001 From: Nicholas Bellinger Date: Fri, 4 Nov 2011 02:36:16 -0700 Subject: target: Address legacy PYX_TRANSPORT_* return code breakage This patch removes legacy usage of PYX_TRANSPORT_* return codes in a number of locations and addresses cases where transport_generic_request_failure() was returning the incorrect sense upon CHECK_CONDITION status after the v3.1 converson to use errno return codes. This includes the conversion of transport_generic_request_failure() to process cmd->scsi_sense_reason and handle extra TCM_RESERVATION_CONFLICT before calling transport_send_check_condition_and_sense() to queue up response status. It also drops PYX_TRANSPORT_OUT_OF_MEMORY_RESOURCES legacy usgae, and returns TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE w/ a response for these cases. transport_generic_allocate_tasks(), transport_generic_new_cmd(), backend SCF_SCSI_DATA_SG_IO_CDB ->do_task(), and emulated ->execute_task() have all been updated to set se_cmd->scsi_sense_reason and return errno codes universally upon failure. This includes cmd->scsi_sense_reason assignment in target_core_alua.c, target_core_pr.c and target_core_cdb.c emulation code. Finally it updates fabric modules to remove the legacy usage, and for TFO->new_cmd_map() callers forwards return values outside of fabric code. iscsi-target has also been updated to remove a handful of special cases related to the cleanup and signaling QUEUE_FULL handling w/ ft_write_pending() (v2: Drop extra SCF_SCSI_CDB_EXCEPTION check during failure from transport_generic_new_cmd, and re-add missing task->task_error_status assignment in transport_complete_task) Cc: Christoph Hellwig Cc: stable@kernel.org Signed-off-by: Nicholas Bellinger --- drivers/target/target_core_pscsi.c | 28 ++++++++++++++++++---------- 1 file changed, 18 insertions(+), 10 deletions(-) (limited to 'drivers/target/target_core_pscsi.c') diff --git a/drivers/target/target_core_pscsi.c b/drivers/target/target_core_pscsi.c index ed32e1efe42..8b15e56b038 100644 --- a/drivers/target/target_core_pscsi.c +++ b/drivers/target/target_core_pscsi.c @@ -963,6 +963,7 @@ static inline struct bio *pscsi_get_bio(int sg_num) static int pscsi_map_sg(struct se_task *task, struct scatterlist *task_sg, struct bio **hbio) { + struct se_cmd *cmd = task->task_se_cmd; struct pscsi_dev_virt *pdv = task->task_se_cmd->se_dev->dev_ptr; u32 task_sg_num = task->task_sg_nents; struct bio *bio = NULL, *tbio = NULL; @@ -971,7 +972,7 @@ static int pscsi_map_sg(struct se_task *task, struct scatterlist *task_sg, u32 data_len = task->task_size, i, len, bytes, off; int nr_pages = (task->task_size + task_sg[0].offset + PAGE_SIZE - 1) >> PAGE_SHIFT; - int nr_vecs = 0, rc, ret = PYX_TRANSPORT_OUT_OF_MEMORY_RESOURCES; + int nr_vecs = 0, rc; int rw = (task->task_data_direction == DMA_TO_DEVICE); *hbio = NULL; @@ -1058,11 +1059,13 @@ fail: bio->bi_next = NULL; bio_endio(bio, 0); /* XXX: should be error */ } - return ret; + cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; + return -ENOMEM; } static int pscsi_do_task(struct se_task *task) { + struct se_cmd *cmd = task->task_se_cmd; struct pscsi_dev_virt *pdv = task->task_se_cmd->se_dev->dev_ptr; struct pscsi_plugin_task *pt = PSCSI_TASK(task); struct request *req; @@ -1078,7 +1081,9 @@ static int pscsi_do_task(struct se_task *task) if (!req || IS_ERR(req)) { pr_err("PSCSI: blk_get_request() failed: %ld\n", req ? IS_ERR(req) : -ENOMEM); - return PYX_TRANSPORT_LU_COMM_FAILURE; + cmd->scsi_sense_reason = + TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; + return -ENODEV; } } else { BUG_ON(!task->task_size); @@ -1087,8 +1092,11 @@ static int pscsi_do_task(struct se_task *task) * Setup the main struct request for the task->task_sg[] payload */ ret = pscsi_map_sg(task, task->task_sg, &hbio); - if (ret < 0) - return PYX_TRANSPORT_LU_COMM_FAILURE; + if (ret < 0) { + cmd->scsi_sense_reason = + TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; + return ret; + } req = blk_make_request(pdv->pdv_sd->request_queue, hbio, GFP_KERNEL); @@ -1115,7 +1123,7 @@ static int pscsi_do_task(struct se_task *task) (task->task_se_cmd->sam_task_attr == MSG_HEAD_TAG), pscsi_req_done); - return PYX_TRANSPORT_SENT_TO_TRANSPORT; + return 0; fail: while (hbio) { @@ -1124,7 +1132,8 @@ fail: bio->bi_next = NULL; bio_endio(bio, 0); /* XXX: should be error */ } - return PYX_TRANSPORT_OUT_OF_MEMORY_RESOURCES; + cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; + return -ENOMEM; } /* pscsi_get_sense_buffer(): @@ -1198,9 +1207,8 @@ static inline void pscsi_process_SAM_status( " 0x%02x Result: 0x%08x\n", task, pt->pscsi_cdb[0], pt->pscsi_result); task->task_scsi_status = SAM_STAT_CHECK_CONDITION; - task->task_error_status = PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; - task->task_se_cmd->transport_error_status = - PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; + task->task_se_cmd->scsi_sense_reason = + TCM_UNSUPPORTED_SCSI_OPCODE; transport_complete_task(task, 0); break; } -- cgit v1.2.3