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scsi: bsg: Move bsg_scsi_ops to drivers/scsi/
Move the SCSI-specific bsg code in the SCSI midlayer instead of in the common bsg code. This just keeps the common bsg code block/ and also allows building it as a module. Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Christoph Hellwig <[email protected]> Signed-off-by: Martin K. Petersen <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,95 @@ | ||
| // SPDX-License-Identifier: GPL-2.0 | ||
| #include <linux/bsg.h> | ||
| #include <scsi/scsi.h> | ||
| #include <scsi/scsi_ioctl.h> | ||
| #include <scsi/scsi_cmnd.h> | ||
| #include <scsi/scsi_device.h> | ||
| #include <scsi/sg.h> | ||
| #include "scsi_priv.h" | ||
|
|
||
| #define uptr64(val) ((void __user *)(uintptr_t)(val)) | ||
|
|
||
| static int scsi_bsg_check_proto(struct sg_io_v4 *hdr) | ||
| { | ||
| if (hdr->protocol != BSG_PROTOCOL_SCSI || | ||
| hdr->subprotocol != BSG_SUB_PROTOCOL_SCSI_CMD) | ||
| return -EINVAL; | ||
| return 0; | ||
| } | ||
|
|
||
| static int scsi_bsg_fill_hdr(struct request *rq, struct sg_io_v4 *hdr, | ||
| fmode_t mode) | ||
| { | ||
| struct scsi_request *sreq = scsi_req(rq); | ||
|
|
||
| if (hdr->dout_xfer_len && hdr->din_xfer_len) { | ||
| pr_warn_once("BIDI support in bsg has been removed.\n"); | ||
| return -EOPNOTSUPP; | ||
| } | ||
|
|
||
| sreq->cmd_len = hdr->request_len; | ||
| if (sreq->cmd_len > BLK_MAX_CDB) { | ||
| sreq->cmd = kzalloc(sreq->cmd_len, GFP_KERNEL); | ||
| if (!sreq->cmd) | ||
| return -ENOMEM; | ||
| } | ||
|
|
||
| if (copy_from_user(sreq->cmd, uptr64(hdr->request), sreq->cmd_len)) | ||
| return -EFAULT; | ||
| if (blk_verify_command(sreq->cmd, mode)) | ||
| return -EPERM; | ||
| return 0; | ||
| } | ||
|
|
||
| static int scsi_bsg_complete_rq(struct request *rq, struct sg_io_v4 *hdr) | ||
| { | ||
| struct scsi_request *sreq = scsi_req(rq); | ||
| int ret = 0; | ||
|
|
||
| /* | ||
| * fill in all the output members | ||
| */ | ||
| hdr->device_status = sreq->result & 0xff; | ||
| hdr->transport_status = host_byte(sreq->result); | ||
| hdr->driver_status = 0; | ||
| if (scsi_status_is_check_condition(sreq->result)) | ||
| hdr->driver_status = DRIVER_SENSE; | ||
| hdr->info = 0; | ||
| if (hdr->device_status || hdr->transport_status || hdr->driver_status) | ||
| hdr->info |= SG_INFO_CHECK; | ||
| hdr->response_len = 0; | ||
|
|
||
| if (sreq->sense_len && hdr->response) { | ||
| int len = min_t(unsigned int, hdr->max_response_len, | ||
| sreq->sense_len); | ||
|
|
||
| if (copy_to_user(uptr64(hdr->response), sreq->sense, len)) | ||
| ret = -EFAULT; | ||
| else | ||
| hdr->response_len = len; | ||
| } | ||
|
|
||
| if (rq_data_dir(rq) == READ) | ||
| hdr->din_resid = sreq->resid_len; | ||
| else | ||
| hdr->dout_resid = sreq->resid_len; | ||
|
|
||
| return ret; | ||
| } | ||
|
|
||
| static void scsi_bsg_free_rq(struct request *rq) | ||
| { | ||
| scsi_req_free_cmd(scsi_req(rq)); | ||
| } | ||
|
|
||
| static const struct bsg_ops scsi_bsg_ops = { | ||
| .check_proto = scsi_bsg_check_proto, | ||
| .fill_hdr = scsi_bsg_fill_hdr, | ||
| .complete_rq = scsi_bsg_complete_rq, | ||
| .free_rq = scsi_bsg_free_rq, | ||
| }; | ||
|
|
||
| int scsi_bsg_register_queue(struct request_queue *q, struct device *parent) | ||
| { | ||
| return bsg_register_queue(q, parent, dev_name(parent), &scsi_bsg_ops); | ||
| } |
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