diff options
| author | Christoph Hellwig <hch@lst.de> | 2018-03-13 19:28:41 +0300 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2018-03-13 20:40:24 +0300 |
| commit | 17cb960f29c29ee07bf6848ada3265f4be55972e (patch) | |
| tree | 8571a25cac75a45261456dbe6711f324dc5b1044 /drivers/scsi/scsi_lib.c | |
| parent | ef6fa64f9b8e1611854077ea9213f2eef2428cd2 (diff) | |
| download | linux-17cb960f29c29ee07bf6848ada3265f4be55972e.tar.xz | |
bsg: split handling of SCSI CDBs vs transport requeues
The current BSG design tries to shoe-horn the transport-specific
passthrough commands into the overall framework for SCSI passthrough
requests. This has a couple problems:
- each passthrough queue has to set the QUEUE_FLAG_SCSI_PASSTHROUGH flag
despite not dealing with SCSI commands at all. Because of that these
queues could also incorrectly accept SCSI commands from in-kernel
users or through the legacy SCSI_IOCTL_SEND_COMMAND ioctl.
- the real SCSI bsg queues also incorrectly accept bsg requests of the
BSG_SUB_PROTOCOL_SCSI_TRANSPORT type
- the bsg transport code is almost unredable because it tries to reuse
different SCSI concepts for its own purpose.
This patch instead adds a new bsg_ops structure to handle the two cases
differently, and thus solves all of the above problems. Another side
effect is that the bsg-lib queues also don't need to embedd a
struct scsi_request anymore.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/scsi/scsi_lib.c')
| -rw-r--r-- | drivers/scsi/scsi_lib.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c index 538152f3528e..37c1d63e847e 100644 --- a/drivers/scsi/scsi_lib.c +++ b/drivers/scsi/scsi_lib.c @@ -2140,8 +2140,6 @@ void __scsi_init_queue(struct Scsi_Host *shost, struct request_queue *q) { struct device *dev = shost->dma_dev; - blk_queue_flag_set(QUEUE_FLAG_SCSI_PASSTHROUGH, q); - /* * this limit is imposed by hardware restrictions */ @@ -2239,6 +2237,7 @@ struct request_queue *scsi_old_alloc_queue(struct scsi_device *sdev) } __scsi_init_queue(shost, q); + blk_queue_flag_set(QUEUE_FLAG_SCSI_PASSTHROUGH, q); blk_queue_prep_rq(q, scsi_prep_fn); blk_queue_unprep_rq(q, scsi_unprep_fn); blk_queue_softirq_done(q, scsi_softirq_done); @@ -2270,6 +2269,7 @@ struct request_queue *scsi_mq_alloc_queue(struct scsi_device *sdev) sdev->request_queue->queuedata = sdev; __scsi_init_queue(sdev->host, sdev->request_queue); + blk_queue_flag_set(QUEUE_FLAG_SCSI_PASSTHROUGH, sdev->request_queue); return sdev->request_queue; } |