diff options
Diffstat (limited to 'drivers/scsi/scsi_lib.c')
-rw-r--r-- | drivers/scsi/scsi_lib.c | 104 |
1 files changed, 52 insertions, 52 deletions
diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c index 99e16ac479e3..550e29f903b7 100644 --- a/drivers/scsi/scsi_lib.c +++ b/drivers/scsi/scsi_lib.c @@ -250,7 +250,6 @@ int scsi_execute(struct scsi_device *sdev, const unsigned char *cmd, if (IS_ERR(req)) return ret; rq = scsi_req(req); - scsi_req_init(req); if (bufflen && blk_rq_map_kern(sdev->request_queue, req, buffer, bufflen, __GFP_RECLAIM)) @@ -635,7 +634,7 @@ static void scsi_release_bidi_buffers(struct scsi_cmnd *cmd) cmd->request->next_rq->special = NULL; } -static bool scsi_end_request(struct request *req, int error, +static bool scsi_end_request(struct request *req, blk_status_t error, unsigned int bytes, unsigned int bidi_bytes) { struct scsi_cmnd *cmd = req->special; @@ -694,45 +693,28 @@ static bool scsi_end_request(struct request *req, int error, * @cmd: SCSI command (unused) * @result: scsi error code * - * Translate SCSI error code into standard UNIX errno. - * Return values: - * -ENOLINK temporary transport failure - * -EREMOTEIO permanent target failure, do not retry - * -EBADE permanent nexus failure, retry on other path - * -ENOSPC No write space available - * -ENODATA Medium error - * -EIO unspecified I/O error + * Translate SCSI error code into block errors. */ -static int __scsi_error_from_host_byte(struct scsi_cmnd *cmd, int result) +static blk_status_t __scsi_error_from_host_byte(struct scsi_cmnd *cmd, + int result) { - int error = 0; - - switch(host_byte(result)) { + switch (host_byte(result)) { case DID_TRANSPORT_FAILFAST: - error = -ENOLINK; - break; + return BLK_STS_TRANSPORT; case DID_TARGET_FAILURE: set_host_byte(cmd, DID_OK); - error = -EREMOTEIO; - break; + return BLK_STS_TARGET; case DID_NEXUS_FAILURE: - set_host_byte(cmd, DID_OK); - error = -EBADE; - break; + return BLK_STS_NEXUS; case DID_ALLOC_FAILURE: set_host_byte(cmd, DID_OK); - error = -ENOSPC; - break; + return BLK_STS_NOSPC; case DID_MEDIUM_ERROR: set_host_byte(cmd, DID_OK); - error = -ENODATA; - break; + return BLK_STS_MEDIUM; default: - error = -EIO; - break; + return BLK_STS_IOERR; } - - return error; } /* @@ -769,7 +751,7 @@ void scsi_io_completion(struct scsi_cmnd *cmd, unsigned int good_bytes) int result = cmd->result; struct request_queue *q = cmd->device->request_queue; struct request *req = cmd->request; - int error = 0; + blk_status_t error = BLK_STS_OK; struct scsi_sense_hdr sshdr; bool sense_valid = false; int sense_deferred = 0, level = 0; @@ -808,7 +790,7 @@ void scsi_io_completion(struct scsi_cmnd *cmd, unsigned int good_bytes) * both sides at once. */ scsi_req(req->next_rq)->resid_len = scsi_in(cmd)->resid; - if (scsi_end_request(req, 0, blk_rq_bytes(req), + if (scsi_end_request(req, BLK_STS_OK, blk_rq_bytes(req), blk_rq_bytes(req->next_rq))) BUG(); return; @@ -850,7 +832,7 @@ void scsi_io_completion(struct scsi_cmnd *cmd, unsigned int good_bytes) scsi_print_sense(cmd); result = 0; /* for passthrough error may be set */ - error = 0; + error = BLK_STS_OK; } /* @@ -922,18 +904,18 @@ void scsi_io_completion(struct scsi_cmnd *cmd, unsigned int good_bytes) action = ACTION_REPREP; } else if (sshdr.asc == 0x10) /* DIX */ { action = ACTION_FAIL; - error = -EILSEQ; + error = BLK_STS_PROTECTION; /* INVALID COMMAND OPCODE or INVALID FIELD IN CDB */ } else if (sshdr.asc == 0x20 || sshdr.asc == 0x24) { action = ACTION_FAIL; - error = -EREMOTEIO; + error = BLK_STS_TARGET; } else action = ACTION_FAIL; break; case ABORTED_COMMAND: action = ACTION_FAIL; if (sshdr.asc == 0x10) /* DIF */ - error = -EILSEQ; + error = BLK_STS_PROTECTION; break; case NOT_READY: /* If the device is in the process of becoming @@ -1134,6 +1116,20 @@ err_exit: } EXPORT_SYMBOL(scsi_init_io); +/** + * scsi_initialize_rq - initialize struct scsi_cmnd.req + * + * Called from inside blk_get_request(). + */ +void scsi_initialize_rq(struct request *rq) +{ + struct scsi_cmnd *cmd = blk_mq_rq_to_pdu(rq); + + scsi_req_init(&cmd->req); +} +EXPORT_SYMBOL(scsi_initialize_rq); + +/* Called after a request has been started. */ void scsi_init_command(struct scsi_device *dev, struct scsi_cmnd *cmd) { void *buf = cmd->sense_buffer; @@ -1829,15 +1825,15 @@ out_delay: blk_delay_queue(q, SCSI_QUEUE_DELAY); } -static inline int prep_to_mq(int ret) +static inline blk_status_t prep_to_mq(int ret) { switch (ret) { case BLKPREP_OK: - return BLK_MQ_RQ_QUEUE_OK; + return BLK_STS_OK; case BLKPREP_DEFER: - return BLK_MQ_RQ_QUEUE_BUSY; + return BLK_STS_RESOURCE; default: - return BLK_MQ_RQ_QUEUE_ERROR; + return BLK_STS_IOERR; } } @@ -1909,7 +1905,7 @@ static void scsi_mq_done(struct scsi_cmnd *cmd) blk_mq_complete_request(cmd->request); } -static int scsi_queue_rq(struct blk_mq_hw_ctx *hctx, +static blk_status_t scsi_queue_rq(struct blk_mq_hw_ctx *hctx, const struct blk_mq_queue_data *bd) { struct request *req = bd->rq; @@ -1917,14 +1913,14 @@ static int scsi_queue_rq(struct blk_mq_hw_ctx *hctx, struct scsi_device *sdev = q->queuedata; struct Scsi_Host *shost = sdev->host; struct scsi_cmnd *cmd = blk_mq_rq_to_pdu(req); - int ret; + blk_status_t ret; int reason; ret = prep_to_mq(scsi_prep_state_check(sdev, req)); - if (ret != BLK_MQ_RQ_QUEUE_OK) + if (ret != BLK_STS_OK) goto out; - ret = BLK_MQ_RQ_QUEUE_BUSY; + ret = BLK_STS_RESOURCE; if (!get_device(&sdev->sdev_gendev)) goto out; @@ -1937,7 +1933,7 @@ static int scsi_queue_rq(struct blk_mq_hw_ctx *hctx, if (!(req->rq_flags & RQF_DONTPREP)) { ret = prep_to_mq(scsi_mq_prep_fn(req)); - if (ret != BLK_MQ_RQ_QUEUE_OK) + if (ret != BLK_STS_OK) goto out_dec_host_busy; req->rq_flags |= RQF_DONTPREP; } else { @@ -1955,11 +1951,11 @@ static int scsi_queue_rq(struct blk_mq_hw_ctx *hctx, reason = scsi_dispatch_cmd(cmd); if (reason) { scsi_set_blocked(cmd, reason); - ret = BLK_MQ_RQ_QUEUE_BUSY; + ret = BLK_STS_RESOURCE; goto out_dec_host_busy; } - return BLK_MQ_RQ_QUEUE_OK; + return BLK_STS_OK; out_dec_host_busy: atomic_dec(&shost->host_busy); @@ -1972,12 +1968,14 @@ out_put_device: put_device(&sdev->sdev_gendev); out: switch (ret) { - case BLK_MQ_RQ_QUEUE_BUSY: + case BLK_STS_OK: + break; + case BLK_STS_RESOURCE: if (atomic_read(&sdev->device_busy) == 0 && !scsi_device_blocked(sdev)) blk_mq_delay_run_hw_queue(hctx, SCSI_QUEUE_DELAY); break; - case BLK_MQ_RQ_QUEUE_ERROR: + default: /* * Make sure to release all allocated ressources when * we hit an error, as we will never see this command @@ -1986,8 +1984,6 @@ out: if (req->rq_flags & RQF_DONTPREP) scsi_mq_uninit_cmd(cmd); break; - default: - break; } return ret; } @@ -2057,6 +2053,8 @@ void __scsi_init_queue(struct Scsi_Host *shost, struct request_queue *q) { struct device *dev = shost->dma_dev; + queue_flag_set_unlocked(QUEUE_FLAG_SCSI_PASSTHROUGH, q); + /* * this limit is imposed by hardware restrictions */ @@ -2139,6 +2137,7 @@ struct request_queue *scsi_alloc_queue(struct scsi_device *sdev) q->request_fn = scsi_request_fn; q->init_rq_fn = scsi_init_rq; q->exit_rq_fn = scsi_exit_rq; + q->initialize_rq_fn = scsi_initialize_rq; if (blk_init_allocated_queue(q) < 0) { blk_cleanup_queue(q); @@ -2163,6 +2162,7 @@ static const struct blk_mq_ops scsi_mq_ops = { #endif .init_request = scsi_init_request, .exit_request = scsi_exit_request, + .initialize_rq_fn = scsi_initialize_rq, .map_queues = scsi_map_queues, }; @@ -2977,7 +2977,7 @@ scsi_internal_device_block(struct scsi_device *sdev, bool wait) if (wait) blk_mq_quiesce_queue(q); else - blk_mq_stop_hw_queues(q); + blk_mq_quiesce_queue_nowait(q); } else { spin_lock_irqsave(q->queue_lock, flags); blk_stop_queue(q); @@ -3031,7 +3031,7 @@ scsi_internal_device_unblock(struct scsi_device *sdev, return -EINVAL; if (q->mq_ops) { - blk_mq_start_stopped_hw_queues(q, false); + blk_mq_unquiesce_queue(q); } else { spin_lock_irqsave(q->queue_lock, flags); blk_start_queue(q); |