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>
This commit is contained in:
Christoph Hellwig
Jens Axboe
parent
ef6fa64f9b
commit
17cb960f29
158
block/bsg-lib.c
158
block/bsg-lib.c
@ -27,6 +27,94 @@
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#include <linux/bsg-lib.h>
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#include <linux/export.h>
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#include <scsi/scsi_cmnd.h>
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#include <scsi/sg.h>
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#define uptr64(val) ((void __user *)(uintptr_t)(val))
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static int bsg_transport_check_proto(struct sg_io_v4 *hdr)
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{
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if (hdr->protocol != BSG_PROTOCOL_SCSI ||
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hdr->subprotocol != BSG_SUB_PROTOCOL_SCSI_TRANSPORT)
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return -EINVAL;
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if (!capable(CAP_SYS_RAWIO))
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return -EPERM;
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return 0;
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}
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static int bsg_transport_fill_hdr(struct request *rq, struct sg_io_v4 *hdr,
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fmode_t mode)
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{
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struct bsg_job *job = blk_mq_rq_to_pdu(rq);
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job->request_len = hdr->request_len;
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job->request = memdup_user(uptr64(hdr->request), hdr->request_len);
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if (IS_ERR(job->request))
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return PTR_ERR(job->request);
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return 0;
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}
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static int bsg_transport_complete_rq(struct request *rq, struct sg_io_v4 *hdr)
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{
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struct bsg_job *job = blk_mq_rq_to_pdu(rq);
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int ret = 0;
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/*
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* The assignments below don't make much sense, but are kept for
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* bug by bug backwards compatibility:
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*/
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hdr->device_status = job->result & 0xff;
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hdr->transport_status = host_byte(job->result);
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hdr->driver_status = driver_byte(job->result);
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hdr->info = 0;
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if (hdr->device_status || hdr->transport_status || hdr->driver_status)
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hdr->info |= SG_INFO_CHECK;
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hdr->response_len = 0;
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if (job->result < 0) {
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/* we're only returning the result field in the reply */
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job->reply_len = sizeof(u32);
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ret = job->result;
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}
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if (job->reply_len && hdr->response) {
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int len = min(hdr->max_response_len, job->reply_len);
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if (copy_to_user(uptr64(hdr->response), job->reply, len))
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ret = -EFAULT;
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else
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hdr->response_len = len;
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}
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/* we assume all request payload was transferred, residual == 0 */
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hdr->dout_resid = 0;
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if (rq->next_rq) {
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unsigned int rsp_len = job->reply_payload.payload_len;
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if (WARN_ON(job->reply_payload_rcv_len > rsp_len))
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hdr->din_resid = 0;
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else
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hdr->din_resid = rsp_len - job->reply_payload_rcv_len;
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} else {
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hdr->din_resid = 0;
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}
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return ret;
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}
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static void bsg_transport_free_rq(struct request *rq)
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{
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struct bsg_job *job = blk_mq_rq_to_pdu(rq);
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kfree(job->request);
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}
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static const struct bsg_ops bsg_transport_ops = {
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.check_proto = bsg_transport_check_proto,
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.fill_hdr = bsg_transport_fill_hdr,
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.complete_rq = bsg_transport_complete_rq,
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.free_rq = bsg_transport_free_rq,
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};
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/**
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* bsg_teardown_job - routine to teardown a bsg job
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@ -68,27 +156,9 @@ EXPORT_SYMBOL_GPL(bsg_job_get);
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void bsg_job_done(struct bsg_job *job, int result,
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unsigned int reply_payload_rcv_len)
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{
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struct request *req = blk_mq_rq_from_pdu(job);
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struct request *rsp = req->next_rq;
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int err;
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err = job->sreq.result = result;
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if (err < 0)
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/* we're only returning the result field in the reply */
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job->sreq.sense_len = sizeof(u32);
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else
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job->sreq.sense_len = job->reply_len;
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/* we assume all request payload was transferred, residual == 0 */
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job->sreq.resid_len = 0;
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if (rsp) {
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WARN_ON(reply_payload_rcv_len > scsi_req(rsp)->resid_len);
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/* set reply (bidi) residual */
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scsi_req(rsp)->resid_len -=
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min(reply_payload_rcv_len, scsi_req(rsp)->resid_len);
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}
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blk_complete_request(req);
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job->result = result;
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job->reply_payload_rcv_len = reply_payload_rcv_len;
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blk_complete_request(blk_mq_rq_from_pdu(job));
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}
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EXPORT_SYMBOL_GPL(bsg_job_done);
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@ -113,7 +183,6 @@ static int bsg_map_buffer(struct bsg_buffer *buf, struct request *req)
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if (!buf->sg_list)
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return -ENOMEM;
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sg_init_table(buf->sg_list, req->nr_phys_segments);
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scsi_req(req)->resid_len = blk_rq_bytes(req);
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buf->sg_cnt = blk_rq_map_sg(req->q, req, buf->sg_list);
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buf->payload_len = blk_rq_bytes(req);
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return 0;
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@ -124,16 +193,13 @@ static int bsg_map_buffer(struct bsg_buffer *buf, struct request *req)
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* @dev: device that is being sent the bsg request
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* @req: BSG request that needs a job structure
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*/
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static int bsg_prepare_job(struct device *dev, struct request *req)
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static bool bsg_prepare_job(struct device *dev, struct request *req)
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{
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struct request *rsp = req->next_rq;
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struct scsi_request *rq = scsi_req(req);
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struct bsg_job *job = blk_mq_rq_to_pdu(req);
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int ret;
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job->timeout = req->timeout;
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job->request = rq->cmd;
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job->request_len = rq->cmd_len;
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if (req->bio) {
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ret = bsg_map_buffer(&job->request_payload, req);
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@ -149,12 +215,13 @@ static int bsg_prepare_job(struct device *dev, struct request *req)
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/* take a reference for the request */
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get_device(job->dev);
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kref_init(&job->kref);
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return 0;
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return true;
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failjob_rls_rqst_payload:
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kfree(job->request_payload.sg_list);
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failjob_rls_job:
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return -ENOMEM;
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job->result = -ENOMEM;
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return false;
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}
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/**
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@ -183,9 +250,7 @@ static void bsg_request_fn(struct request_queue *q)
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break;
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spin_unlock_irq(q->queue_lock);
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ret = bsg_prepare_job(dev, req);
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if (ret) {
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scsi_req(req)->result = ret;
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if (!bsg_prepare_job(dev, req)) {
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blk_end_request_all(req, BLK_STS_OK);
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spin_lock_irq(q->queue_lock);
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continue;
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@ -202,46 +267,34 @@ static void bsg_request_fn(struct request_queue *q)
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spin_lock_irq(q->queue_lock);
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}
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/* called right after the request is allocated for the request_queue */
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static int bsg_init_rq(struct request_queue *q, struct request *req, gfp_t gfp)
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{
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struct bsg_job *job = blk_mq_rq_to_pdu(req);
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struct scsi_request *sreq = &job->sreq;
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/* called right after the request is allocated for the request_queue */
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sreq->sense = kzalloc(SCSI_SENSE_BUFFERSIZE, gfp);
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if (!sreq->sense)
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job->reply = kzalloc(SCSI_SENSE_BUFFERSIZE, gfp);
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if (!job->reply)
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return -ENOMEM;
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return 0;
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}
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/* called right before the request is given to the request_queue user */
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static void bsg_initialize_rq(struct request *req)
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{
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struct bsg_job *job = blk_mq_rq_to_pdu(req);
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struct scsi_request *sreq = &job->sreq;
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void *sense = sreq->sense;
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/* called right before the request is given to the request_queue user */
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void *reply = job->reply;
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memset(job, 0, sizeof(*job));
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scsi_req_init(sreq);
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sreq->sense = sense;
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sreq->sense_len = SCSI_SENSE_BUFFERSIZE;
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job->reply = sense;
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job->reply_len = sreq->sense_len;
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job->reply = reply;
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job->reply_len = SCSI_SENSE_BUFFERSIZE;
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job->dd_data = job + 1;
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}
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static void bsg_exit_rq(struct request_queue *q, struct request *req)
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{
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struct bsg_job *job = blk_mq_rq_to_pdu(req);
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struct scsi_request *sreq = &job->sreq;
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kfree(sreq->sense);
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kfree(job->reply);
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}
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/**
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@ -275,11 +328,10 @@ struct request_queue *bsg_setup_queue(struct device *dev, const char *name,
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q->queuedata = dev;
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q->bsg_job_fn = job_fn;
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blk_queue_flag_set(QUEUE_FLAG_BIDI, q);
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blk_queue_flag_set(QUEUE_FLAG_SCSI_PASSTHROUGH, q);
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blk_queue_softirq_done(q, bsg_softirq_done);
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blk_queue_rq_timeout(q, BLK_DEFAULT_SG_TIMEOUT);
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ret = bsg_register_queue(q, dev, name, release);
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ret = bsg_register_queue(q, dev, name, &bsg_transport_ops, release);
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if (ret) {
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printk(KERN_ERR "%s: bsg interface failed to "
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"initialize - register queue\n", dev->kobj.name);
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298
block/bsg.c
298
block/bsg.c
@ -130,32 +130,110 @@ static inline struct hlist_head *bsg_dev_idx_hash(int index)
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return &bsg_device_list[index & (BSG_LIST_ARRAY_SIZE - 1)];
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}
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static int blk_fill_sgv4_hdr_rq(struct request_queue *q, struct request *rq,
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struct sg_io_v4 *hdr, struct bsg_device *bd,
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fmode_t mode)
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{
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struct scsi_request *req = scsi_req(rq);
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#define uptr64(val) ((void __user *)(uintptr_t)(val))
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if (hdr->request_len > BLK_MAX_CDB) {
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req->cmd = kzalloc(hdr->request_len, GFP_KERNEL);
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if (!req->cmd)
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static int bsg_scsi_check_proto(struct sg_io_v4 *hdr)
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{
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if (hdr->protocol != BSG_PROTOCOL_SCSI ||
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hdr->subprotocol != BSG_SUB_PROTOCOL_SCSI_CMD)
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return -EINVAL;
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return 0;
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}
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static int bsg_scsi_fill_hdr(struct request *rq, struct sg_io_v4 *hdr,
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fmode_t mode)
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{
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struct scsi_request *sreq = scsi_req(rq);
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sreq->cmd_len = hdr->request_len;
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if (sreq->cmd_len > BLK_MAX_CDB) {
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sreq->cmd = kzalloc(sreq->cmd_len, GFP_KERNEL);
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if (!sreq->cmd)
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return -ENOMEM;
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}
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if (copy_from_user(req->cmd, (void __user *)(unsigned long)hdr->request,
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hdr->request_len))
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if (copy_from_user(sreq->cmd, uptr64(hdr->request), sreq->cmd_len))
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return -EFAULT;
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if (hdr->subprotocol == BSG_SUB_PROTOCOL_SCSI_CMD) {
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if (blk_verify_command(req->cmd, mode))
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return -EPERM;
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} else if (!capable(CAP_SYS_RAWIO))
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if (blk_verify_command(sreq->cmd, mode))
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return -EPERM;
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return 0;
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}
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static int bsg_scsi_complete_rq(struct request *rq, struct sg_io_v4 *hdr)
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{
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struct scsi_request *sreq = scsi_req(rq);
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int ret = 0;
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/*
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* fill in request structure
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* fill in all the output members
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*/
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req->cmd_len = hdr->request_len;
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hdr->device_status = sreq->result & 0xff;
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hdr->transport_status = host_byte(sreq->result);
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hdr->driver_status = driver_byte(sreq->result);
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hdr->info = 0;
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if (hdr->device_status || hdr->transport_status || hdr->driver_status)
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hdr->info |= SG_INFO_CHECK;
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hdr->response_len = 0;
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if (sreq->sense_len && hdr->response) {
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int len = min_t(unsigned int, hdr->max_response_len,
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sreq->sense_len);
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if (copy_to_user(uptr64(hdr->response), sreq->sense, len))
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ret = -EFAULT;
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else
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hdr->response_len = len;
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}
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if (rq->next_rq) {
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hdr->dout_resid = sreq->resid_len;
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hdr->din_resid = scsi_req(rq->next_rq)->resid_len;
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} else if (rq_data_dir(rq) == READ) {
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hdr->din_resid = sreq->resid_len;
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} else {
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hdr->dout_resid = sreq->resid_len;
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}
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return ret;
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}
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static void bsg_scsi_free_rq(struct request *rq)
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{
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scsi_req_free_cmd(scsi_req(rq));
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}
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static const struct bsg_ops bsg_scsi_ops = {
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.check_proto = bsg_scsi_check_proto,
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.fill_hdr = bsg_scsi_fill_hdr,
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.complete_rq = bsg_scsi_complete_rq,
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.free_rq = bsg_scsi_free_rq,
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};
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static struct request *
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bsg_map_hdr(struct request_queue *q, struct sg_io_v4 *hdr, fmode_t mode)
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{
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struct request *rq, *next_rq = NULL;
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int ret;
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if (!q->bsg_dev.class_dev)
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return ERR_PTR(-ENXIO);
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if (hdr->guard != 'Q')
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return ERR_PTR(-EINVAL);
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ret = q->bsg_dev.ops->check_proto(hdr);
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if (ret)
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return ERR_PTR(ret);
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rq = blk_get_request(q, hdr->dout_xfer_len ?
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REQ_OP_SCSI_OUT : REQ_OP_SCSI_IN,
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GFP_KERNEL);
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if (IS_ERR(rq))
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return rq;
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ret = q->bsg_dev.ops->fill_hdr(rq, hdr, mode);
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if (ret)
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goto out;
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rq->timeout = msecs_to_jiffies(hdr->timeout);
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if (!rq->timeout)
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@ -165,79 +243,7 @@ static int blk_fill_sgv4_hdr_rq(struct request_queue *q, struct request *rq,
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if (rq->timeout < BLK_MIN_SG_TIMEOUT)
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rq->timeout = BLK_MIN_SG_TIMEOUT;
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return 0;
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}
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/*
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* Check if sg_io_v4 from user is allowed and valid
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*/
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static int
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bsg_validate_sgv4_hdr(struct sg_io_v4 *hdr, int *op)
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{
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int ret = 0;
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if (hdr->guard != 'Q')
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return -EINVAL;
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switch (hdr->protocol) {
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case BSG_PROTOCOL_SCSI:
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switch (hdr->subprotocol) {
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case BSG_SUB_PROTOCOL_SCSI_CMD:
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case BSG_SUB_PROTOCOL_SCSI_TRANSPORT:
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break;
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default:
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ret = -EINVAL;
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}
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break;
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default:
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ret = -EINVAL;
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}
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*op = hdr->dout_xfer_len ? REQ_OP_SCSI_OUT : REQ_OP_SCSI_IN;
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return ret;
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}
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/*
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* map sg_io_v4 to a request.
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*/
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static struct request *
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bsg_map_hdr(struct bsg_device *bd, struct sg_io_v4 *hdr, fmode_t mode)
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{
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struct request_queue *q = bd->queue;
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struct request *rq, *next_rq = NULL;
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int ret;
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unsigned int op, dxfer_len;
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void __user *dxferp = NULL;
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struct bsg_class_device *bcd = &q->bsg_dev;
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/* if the LLD has been removed then the bsg_unregister_queue will
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* eventually be called and the class_dev was freed, so we can no
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* longer use this request_queue. Return no such address.
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*/
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if (!bcd->class_dev)
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return ERR_PTR(-ENXIO);
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bsg_dbg(bd, "map hdr %llx/%u %llx/%u\n",
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||||
(unsigned long long) hdr->dout_xferp,
|
||||
hdr->dout_xfer_len, (unsigned long long) hdr->din_xferp,
|
||||
hdr->din_xfer_len);
|
||||
|
||||
ret = bsg_validate_sgv4_hdr(hdr, &op);
|
||||
if (ret)
|
||||
return ERR_PTR(ret);
|
||||
|
||||
/*
|
||||
* map scatter-gather elements separately and string them to request
|
||||
*/
|
||||
rq = blk_get_request(q, op, GFP_KERNEL);
|
||||
if (IS_ERR(rq))
|
||||
return rq;
|
||||
|
||||
ret = blk_fill_sgv4_hdr_rq(q, rq, hdr, bd, mode);
|
||||
if (ret)
|
||||
goto out;
|
||||
|
||||
if (op == REQ_OP_SCSI_OUT && hdr->din_xfer_len) {
|
||||
if (hdr->dout_xfer_len && hdr->din_xfer_len) {
|
||||
if (!test_bit(QUEUE_FLAG_BIDI, &q->queue_flags)) {
|
||||
ret = -EOPNOTSUPP;
|
||||
goto out;
|
||||
@ -246,42 +252,39 @@ bsg_map_hdr(struct bsg_device *bd, struct sg_io_v4 *hdr, fmode_t mode)
|
||||
next_rq = blk_get_request(q, REQ_OP_SCSI_IN, GFP_KERNEL);
|
||||
if (IS_ERR(next_rq)) {
|
||||
ret = PTR_ERR(next_rq);
|
||||
next_rq = NULL;
|
||||
goto out;
|
||||
}
|
||||
rq->next_rq = next_rq;
|
||||
|
||||
dxferp = (void __user *)(unsigned long)hdr->din_xferp;
|
||||
ret = blk_rq_map_user(q, next_rq, NULL, dxferp,
|
||||
rq->next_rq = next_rq;
|
||||
ret = blk_rq_map_user(q, next_rq, NULL, uptr64(hdr->din_xferp),
|
||||
hdr->din_xfer_len, GFP_KERNEL);
|
||||
if (ret)
|
||||
goto out;
|
||||
goto out_free_nextrq;
|
||||
}
|
||||
|
||||
if (hdr->dout_xfer_len) {
|
||||
dxfer_len = hdr->dout_xfer_len;
|
||||
dxferp = (void __user *)(unsigned long)hdr->dout_xferp;
|
||||
ret = blk_rq_map_user(q, rq, NULL, uptr64(hdr->dout_xferp),
|
||||
hdr->dout_xfer_len, GFP_KERNEL);
|
||||
} else if (hdr->din_xfer_len) {
|
||||
dxfer_len = hdr->din_xfer_len;
|
||||
dxferp = (void __user *)(unsigned long)hdr->din_xferp;
|
||||
} else
|
||||
dxfer_len = 0;
|
||||
|
||||
if (dxfer_len) {
|
||||
ret = blk_rq_map_user(q, rq, NULL, dxferp, dxfer_len,
|
||||
GFP_KERNEL);
|
||||
if (ret)
|
||||
goto out;
|
||||
ret = blk_rq_map_user(q, rq, NULL, uptr64(hdr->din_xferp),
|
||||
hdr->din_xfer_len, GFP_KERNEL);
|
||||
} else {
|
||||
ret = blk_rq_map_user(q, rq, NULL, NULL, 0, GFP_KERNEL);
|
||||
}
|
||||
|
||||
if (ret)
|
||||
goto out_unmap_nextrq;
|
||||
return rq;
|
||||
|
||||
out_unmap_nextrq:
|
||||
if (rq->next_rq)
|
||||
blk_rq_unmap_user(rq->next_rq->bio);
|
||||
out_free_nextrq:
|
||||
if (rq->next_rq)
|
||||
blk_put_request(rq->next_rq);
|
||||
out:
|
||||
scsi_req_free_cmd(scsi_req(rq));
|
||||
q->bsg_dev.ops->free_rq(rq);
|
||||
blk_put_request(rq);
|
||||
if (next_rq) {
|
||||
blk_rq_unmap_user(next_rq->bio);
|
||||
blk_put_request(next_rq);
|
||||
}
|
||||
return ERR_PTR(ret);
|
||||
}
|
||||
|
||||
@ -383,56 +386,18 @@ static struct bsg_command *bsg_get_done_cmd(struct bsg_device *bd)
|
||||
static int blk_complete_sgv4_hdr_rq(struct request *rq, struct sg_io_v4 *hdr,
|
||||
struct bio *bio, struct bio *bidi_bio)
|
||||
{
|
||||
struct scsi_request *req = scsi_req(rq);
|
||||
int ret = 0;
|
||||
int ret;
|
||||
|
||||
pr_debug("rq %p bio %p 0x%x\n", rq, bio, req->result);
|
||||
/*
|
||||
* fill in all the output members
|
||||
*/
|
||||
hdr->device_status = req->result & 0xff;
|
||||
hdr->transport_status = host_byte(req->result);
|
||||
hdr->driver_status = driver_byte(req->result);
|
||||
hdr->info = 0;
|
||||
if (hdr->device_status || hdr->transport_status || hdr->driver_status)
|
||||
hdr->info |= SG_INFO_CHECK;
|
||||
hdr->response_len = 0;
|
||||
|
||||
if (req->sense_len && hdr->response) {
|
||||
int len = min_t(unsigned int, hdr->max_response_len,
|
||||
req->sense_len);
|
||||
|
||||
ret = copy_to_user((void __user *)(unsigned long)hdr->response,
|
||||
req->sense, len);
|
||||
if (!ret)
|
||||
hdr->response_len = len;
|
||||
else
|
||||
ret = -EFAULT;
|
||||
}
|
||||
ret = rq->q->bsg_dev.ops->complete_rq(rq, hdr);
|
||||
|
||||
if (rq->next_rq) {
|
||||
hdr->dout_resid = req->resid_len;
|
||||
hdr->din_resid = scsi_req(rq->next_rq)->resid_len;
|
||||
blk_rq_unmap_user(bidi_bio);
|
||||
blk_put_request(rq->next_rq);
|
||||
} else if (rq_data_dir(rq) == READ)
|
||||
hdr->din_resid = req->resid_len;
|
||||
else
|
||||
hdr->dout_resid = req->resid_len;
|
||||
|
||||
/*
|
||||
* If the request generated a negative error number, return it
|
||||
* (providing we aren't already returning an error); if it's
|
||||
* just a protocol response (i.e. non negative), that gets
|
||||
* processed above.
|
||||
*/
|
||||
if (!ret && req->result < 0)
|
||||
ret = req->result;
|
||||
}
|
||||
|
||||
blk_rq_unmap_user(bio);
|
||||
scsi_req_free_cmd(req);
|
||||
rq->q->bsg_dev.ops->free_rq(rq);
|
||||
blk_put_request(rq);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
@ -614,7 +579,7 @@ static int __bsg_write(struct bsg_device *bd, const char __user *buf,
|
||||
/*
|
||||
* get a request, fill in the blanks, and add to request queue
|
||||
*/
|
||||
rq = bsg_map_hdr(bd, &bc->hdr, mode);
|
||||
rq = bsg_map_hdr(bd->queue, &bc->hdr, mode);
|
||||
if (IS_ERR(rq)) {
|
||||
ret = PTR_ERR(rq);
|
||||
rq = NULL;
|
||||
@ -742,11 +707,6 @@ static struct bsg_device *bsg_add_device(struct inode *inode,
|
||||
struct bsg_device *bd;
|
||||
unsigned char buf[32];
|
||||
|
||||
if (!blk_queue_scsi_passthrough(rq)) {
|
||||
WARN_ONCE(true, "Attempt to register a non-SCSI queue\n");
|
||||
return ERR_PTR(-EINVAL);
|
||||
}
|
||||
|
||||
if (!blk_get_queue(rq))
|
||||
return ERR_PTR(-ENXIO);
|
||||
|
||||
@ -907,7 +867,7 @@ static long bsg_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
|
||||
if (copy_from_user(&hdr, uarg, sizeof(hdr)))
|
||||
return -EFAULT;
|
||||
|
||||
rq = bsg_map_hdr(bd, &hdr, file->f_mode);
|
||||
rq = bsg_map_hdr(bd->queue, &hdr, file->f_mode);
|
||||
if (IS_ERR(rq))
|
||||
return PTR_ERR(rq);
|
||||
|
||||
@ -959,7 +919,8 @@ void bsg_unregister_queue(struct request_queue *q)
|
||||
EXPORT_SYMBOL_GPL(bsg_unregister_queue);
|
||||
|
||||
int bsg_register_queue(struct request_queue *q, struct device *parent,
|
||||
const char *name, void (*release)(struct device *))
|
||||
const char *name, const struct bsg_ops *ops,
|
||||
void (*release)(struct device *))
|
||||
{
|
||||
struct bsg_class_device *bcd;
|
||||
dev_t dev;
|
||||
@ -996,6 +957,7 @@ int bsg_register_queue(struct request_queue *q, struct device *parent,
|
||||
bcd->queue = q;
|
||||
bcd->parent = get_device(parent);
|
||||
bcd->release = release;
|
||||
bcd->ops = ops;
|
||||
kref_init(&bcd->ref);
|
||||
dev = MKDEV(bsg_major, bcd->minor);
|
||||
class_dev = device_create(bsg_class, parent, dev, NULL, "%s", devname);
|
||||
@ -1023,7 +985,17 @@ unlock:
|
||||
mutex_unlock(&bsg_mutex);
|
||||
return ret;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(bsg_register_queue);
|
||||
|
||||
int bsg_scsi_register_queue(struct request_queue *q, struct device *parent)
|
||||
{
|
||||
if (!blk_queue_scsi_passthrough(q)) {
|
||||
WARN_ONCE(true, "Attempt to register a non-SCSI queue\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
return bsg_register_queue(q, parent, NULL, &bsg_scsi_ops, NULL);
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(bsg_scsi_register_queue);
|
||||
|
||||
static struct cdev bsg_cdev;
|
||||
|
||||
|
||||
@ -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;
|
||||
}
|
||||
|
||||
|
||||
@ -1292,8 +1292,7 @@ int scsi_sysfs_add_sdev(struct scsi_device *sdev)
|
||||
transport_add_device(&sdev->sdev_gendev);
|
||||
sdev->is_visible = 1;
|
||||
|
||||
error = bsg_register_queue(rq, &sdev->sdev_gendev, NULL, NULL);
|
||||
|
||||
error = bsg_scsi_register_queue(rq, &sdev->sdev_gendev);
|
||||
if (error)
|
||||
/* we're treating error on bsg register as non-fatal,
|
||||
* so pretend nothing went wrong */
|
||||
|
||||
@ -228,7 +228,6 @@ static int sas_bsg_initialize(struct Scsi_Host *shost, struct sas_rphy *rphy)
|
||||
*/
|
||||
blk_queue_bounce_limit(q, BLK_BOUNCE_HIGH);
|
||||
blk_queue_flag_set(QUEUE_FLAG_BIDI, q);
|
||||
blk_queue_flag_set(QUEUE_FLAG_SCSI_PASSTHROUGH, q);
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
@ -38,7 +38,6 @@ struct bsg_buffer {
|
||||
};
|
||||
|
||||
struct bsg_job {
|
||||
struct scsi_request sreq;
|
||||
struct device *dev;
|
||||
|
||||
struct kref kref;
|
||||
@ -64,6 +63,9 @@ struct bsg_job {
|
||||
struct bsg_buffer request_payload;
|
||||
struct bsg_buffer reply_payload;
|
||||
|
||||
int result;
|
||||
unsigned int reply_payload_rcv_len;
|
||||
|
||||
void *dd_data; /* Used for driver-specific storage */
|
||||
};
|
||||
|
||||
|
||||
@ -1,34 +1,43 @@
|
||||
/* SPDX-License-Identifier: GPL-2.0 */
|
||||
#ifndef BSG_H
|
||||
#define BSG_H
|
||||
#ifndef _LINUX_BSG_H
|
||||
#define _LINUX_BSG_H
|
||||
|
||||
#include <uapi/linux/bsg.h>
|
||||
|
||||
struct request;
|
||||
|
||||
#ifdef CONFIG_BLK_DEV_BSG
|
||||
struct bsg_ops {
|
||||
int (*check_proto)(struct sg_io_v4 *hdr);
|
||||
int (*fill_hdr)(struct request *rq, struct sg_io_v4 *hdr,
|
||||
fmode_t mode);
|
||||
int (*complete_rq)(struct request *rq, struct sg_io_v4 *hdr);
|
||||
void (*free_rq)(struct request *rq);
|
||||
};
|
||||
|
||||
#if defined(CONFIG_BLK_DEV_BSG)
|
||||
struct bsg_class_device {
|
||||
struct device *class_dev;
|
||||
struct device *parent;
|
||||
int minor;
|
||||
struct request_queue *queue;
|
||||
struct kref ref;
|
||||
const struct bsg_ops *ops;
|
||||
void (*release)(struct device *);
|
||||
};
|
||||
|
||||
extern int bsg_register_queue(struct request_queue *q,
|
||||
struct device *parent, const char *name,
|
||||
void (*release)(struct device *));
|
||||
extern void bsg_unregister_queue(struct request_queue *);
|
||||
int bsg_register_queue(struct request_queue *q, struct device *parent,
|
||||
const char *name, const struct bsg_ops *ops,
|
||||
void (*release)(struct device *));
|
||||
int bsg_scsi_register_queue(struct request_queue *q, struct device *parent);
|
||||
void bsg_unregister_queue(struct request_queue *q);
|
||||
#else
|
||||
static inline int bsg_register_queue(struct request_queue *q,
|
||||
struct device *parent, const char *name,
|
||||
void (*release)(struct device *))
|
||||
static inline int bsg_scsi_register_queue(struct request_queue *q,
|
||||
struct device *parent)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
static inline void bsg_unregister_queue(struct request_queue *q)
|
||||
{
|
||||
}
|
||||
#endif
|
||||
|
||||
#endif
|
||||
#endif /* CONFIG_BLK_DEV_BSG */
|
||||
#endif /* _LINUX_BSG_H */
|
||||
|
||||
Loading…
Reference in New Issue
Block a user