Now that all conversions are done, move the FibreChannel bsg code over to the
bsg library. Note that CONFIG_SCSI_FC_ATTRS now needs to select BLK_DEV_BSGLIB
in order to build correctly.
This patch is derived from work done by Mike Christie in 2011 [1] but only the
iscsi parts got merged back then.
[1] http://marc.info/?l=linux-scsi&m=131149780921009&w=2
Signed-off-by: Johannes Thumshirn
---
drivers/scsi/Kconfig | 1 +
drivers/scsi/scsi_transport_fc.c | 287 ++-
2 files changed, 44 insertions(+), 244 deletions(-)
diff --git a/drivers/scsi/Kconfig b/drivers/scsi/Kconfig
index 7d1b431..1a0338c 100644
--- a/drivers/scsi/Kconfig
+++ b/drivers/scsi/Kconfig
@@ -263,6 +263,7 @@ config SCSI_SPI_ATTRS
config SCSI_FC_ATTRS
tristate "FiberChannel Transport Attributes"
depends on SCSI && NET
+ select BLK_DEV_BSGLIB
select SCSI_NETLINK
help
If you wish to export transport-specific information about
diff --git a/drivers/scsi/scsi_transport_fc.c b/drivers/scsi/scsi_transport_fc.c
index 7fae045..916d488 100644
--- a/drivers/scsi/scsi_transport_fc.c
+++ b/drivers/scsi/scsi_transport_fc.c
@@ -3591,111 +3591,12 @@ fc_bsg_job_timeout(struct request *req)
return BLK_EH_HANDLED;
}
-static int
-fc_bsg_map_buffer(struct bsg_buffer *buf, struct request *req)
-{
- size_t sz = (sizeof(struct scatterlist) * req->nr_phys_segments);
-
- BUG_ON(!req->nr_phys_segments);
-
- buf->sg_list = kzalloc(sz, GFP_KERNEL);
- if (!buf->sg_list)
- return -ENOMEM;
- sg_init_table(buf->sg_list, req->nr_phys_segments);
- buf->sg_cnt = blk_rq_map_sg(req->q, req, buf->sg_list);
- buf->payload_len = blk_rq_bytes(req);
- return 0;
-}
-
-
-/**
- * fc_req_to_bsgjob - Allocate/create the fc_bsg_job structure for the
- * bsg request
- * @shost: SCSI Host corresponding to the bsg object
- * @rport: (optional) FC Remote Port corresponding to the bsg object
- * @req: BSG request that needs a job structure
- */
-static int
-fc_req_to_bsgjob(struct Scsi_Host *shost, struct fc_rport *rport,
- struct request *req)
-{
- struct fc_internal *i = to_fc_internal(shost->transportt);
- struct request *rsp = req->next_rq;
- struct bsg_job *job;
- struct fc_bsg_request *bsg_request;
- struct fc_bsg_reply *bsg_reply;
- int ret;
-
- BUG_ON(req->special);
-
- job = kzalloc(sizeof(struct bsg_job) + i->f->dd_bsg_size,
- GFP_KERNEL);
- if (!job)
- return -ENOMEM;
-
- /*
-* Note: this is a bit silly.
-* The request gets formatted as a SGIO v4 ioctl request, which
-* then gets reformatted as a blk request, which then gets
-* reformatted as a fc bsg request. And on completion, we have
-* to wrap return results such that SGIO v4 thinks it was a scsi
-* status. I hope this was all worth it.
-*/
-
- req->special = job;
- job->req = req;
- if (i->f->dd_bsg_size)
- job->dd_data = (void *)&job[1];
- bsg_request = (struct fc_bsg_request *)req->cmd;
- job->request_len = req->cmd_len;
- bsg_reply = req->sense;
- job->reply_len = SCSI_SENSE_BUFFERSIZE; /* Size of sense buffer
-* allocated */
- if (req->bio) {
- ret = fc_bsg_map_buffer(&job->request_payload, req);
- if (ret)
- goto failjob_rls_job;
- }
- if (rsp && rsp->bio) {
- ret = fc_bsg_map_buffer(&job->reply_payload, rsp);
- if (ret)
- goto failjob_rls_rqst_payload;
- }
- if (rport)
- job->dev = &rport->dev;
- else
- job->dev = &shost->shost_gendev;
- get_device(job->dev); /* take a reference for the request */
-
- kref_init(&job->kref);
-
- return 0;
-
-
-failjob_rls_rqst_payload:
- kfree(job->request_payload.sg_list);
-failjob_rls_job:
- kfree(job);
- return -ENOMEM;
-}
-
-
-enum fc_dispatch_result {
- FC_DISPATCH_BREAK, /* on return, q is locked, break from q loop */
- FC_DISPATCH_LOCKED, /* on return, q is locked, continue on */
- FC_DISPATCH_UNLOCKED, /* on return, q is unlocked, continue on */
-};
-
-
/**
* fc_bsg_host_dispatch - process fc host bsg requests and dispatch to LLDD
- * @q: fc host request queue
* @shost: scsi host rport attached to
* @job: bsg job to be processed
*/
-static enum fc_dispatch_result
-fc_bsg_host_dispatch(struct request_queue *q, struct Scsi_Host *shost,
-struct bsg_job *job)
+static int fc_bsg_host_dispatch(struct Scsi_Host *shost, struct bsg_job *job)
{
struct fc_internal *i = to_fc_internal(shost->transportt);
struct fc_bsg_request
