mirror of
https://github.com/torvalds/linux.git
synced 2024-11-24 21:21:41 +00:00
1991299e49
Instead of passing a fmode_t and only checking it for FMODE_WRITE, pass a bool open_for_write to prepare for callers that won't have the fmode_t. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Acked-by: Christian Brauner <brauner@kernel.org> Link: https://lore.kernel.org/r/20230608110258.189493-21-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
104 lines
2.6 KiB
C
104 lines
2.6 KiB
C
// 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_sg_io_fn(struct request_queue *q, struct sg_io_v4 *hdr,
|
|
bool open_for_write, unsigned int timeout)
|
|
{
|
|
struct scsi_cmnd *scmd;
|
|
struct request *rq;
|
|
struct bio *bio;
|
|
int ret;
|
|
|
|
if (hdr->protocol != BSG_PROTOCOL_SCSI ||
|
|
hdr->subprotocol != BSG_SUB_PROTOCOL_SCSI_CMD)
|
|
return -EINVAL;
|
|
if (hdr->dout_xfer_len && hdr->din_xfer_len) {
|
|
pr_warn_once("BIDI support in bsg has been removed.\n");
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
rq = scsi_alloc_request(q, hdr->dout_xfer_len ?
|
|
REQ_OP_DRV_OUT : REQ_OP_DRV_IN, 0);
|
|
if (IS_ERR(rq))
|
|
return PTR_ERR(rq);
|
|
rq->timeout = timeout;
|
|
|
|
scmd = blk_mq_rq_to_pdu(rq);
|
|
scmd->cmd_len = hdr->request_len;
|
|
if (scmd->cmd_len > sizeof(scmd->cmnd)) {
|
|
ret = -EINVAL;
|
|
goto out_put_request;
|
|
}
|
|
|
|
ret = -EFAULT;
|
|
if (copy_from_user(scmd->cmnd, uptr64(hdr->request), scmd->cmd_len))
|
|
goto out_put_request;
|
|
ret = -EPERM;
|
|
if (!scsi_cmd_allowed(scmd->cmnd, open_for_write))
|
|
goto out_put_request;
|
|
|
|
ret = 0;
|
|
if (hdr->dout_xfer_len) {
|
|
ret = blk_rq_map_user(rq->q, rq, NULL, uptr64(hdr->dout_xferp),
|
|
hdr->dout_xfer_len, GFP_KERNEL);
|
|
} else if (hdr->din_xfer_len) {
|
|
ret = blk_rq_map_user(rq->q, rq, NULL, uptr64(hdr->din_xferp),
|
|
hdr->din_xfer_len, GFP_KERNEL);
|
|
}
|
|
|
|
if (ret)
|
|
goto out_put_request;
|
|
|
|
bio = rq->bio;
|
|
blk_execute_rq(rq, !(hdr->flags & BSG_FLAG_Q_AT_TAIL));
|
|
|
|
/*
|
|
* fill in all the output members
|
|
*/
|
|
hdr->device_status = scmd->result & 0xff;
|
|
hdr->transport_status = host_byte(scmd->result);
|
|
hdr->driver_status = 0;
|
|
if (scsi_status_is_check_condition(scmd->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 (scmd->sense_len && hdr->response) {
|
|
int len = min_t(unsigned int, hdr->max_response_len,
|
|
scmd->sense_len);
|
|
|
|
if (copy_to_user(uptr64(hdr->response), scmd->sense_buffer,
|
|
len))
|
|
ret = -EFAULT;
|
|
else
|
|
hdr->response_len = len;
|
|
}
|
|
|
|
if (rq_data_dir(rq) == READ)
|
|
hdr->din_resid = scmd->resid_len;
|
|
else
|
|
hdr->dout_resid = scmd->resid_len;
|
|
|
|
blk_rq_unmap_user(bio);
|
|
|
|
out_put_request:
|
|
blk_mq_free_request(rq);
|
|
return ret;
|
|
}
|
|
|
|
struct bsg_device *scsi_bsg_register_queue(struct scsi_device *sdev)
|
|
{
|
|
return bsg_register_queue(sdev->request_queue, &sdev->sdev_gendev,
|
|
dev_name(&sdev->sdev_gendev), scsi_bsg_sg_io_fn);
|
|
}
|