[PATCH 22/24] scsi: factor SCSI_IOCTL_GET_IDLUN handling into a helper
From: Christoph Hellwig <hch@lst.de>
Date: 2021-07-12 05:58:08
Also in:
linux-scsi
Subsystem:
scsi subsystem, the rest · Maintainers:
"James E.J. Bottomley", "Martin K. Petersen", Linus Torvalds
Split the SCSI_IOCTL_GET_IDLUN handler from the main scsi_ioctl routine. Signed-off-by: Christoph Hellwig <hch@lst.de> --- drivers/scsi/scsi_ioctl.c | 28 ++++++++++++++++------------ 1 file changed, 16 insertions(+), 12 deletions(-)
diff --git a/drivers/scsi/scsi_ioctl.c b/drivers/scsi/scsi_ioctl.c
index f6f16edecc67..634cf62ec6fd 100644
--- a/drivers/scsi/scsi_ioctl.c
+++ b/drivers/scsi/scsi_ioctl.c@@ -218,6 +218,20 @@ static int sg_emulated_host(struct request_queue *q, int __user *p) return put_user(1, p); } +static int scsi_get_idlun(struct scsi_device *sdev, void __user *argp) +{ + struct scsi_idlun v = { + .dev_id = (sdev->id & 0xff) + + ((sdev->lun & 0xff) << 8) + + ((sdev->channel & 0xff) << 16) + + ((sdev->host->host_no & 0xff) << 24), + .host_unique_id = sdev->host->unique_id + }; + if (copy_to_user(argp, &v, sizeof(struct scsi_idlun))) + return -EFAULT; + return 0; +} + static int scsi_send_start_stop(struct scsi_device *sdev, int data) { char cdb[MAX_COMMAND_SIZE] = { };
@@ -915,18 +929,8 @@ int scsi_ioctl(struct scsi_device *sdev, struct gendisk *disk, fmode_t mode, return scsi_send_start_stop(sdev, 3); case CDROMEJECT: return scsi_send_start_stop(sdev, 2); - case SCSI_IOCTL_GET_IDLUN: { - struct scsi_idlun v = { - .dev_id = (sdev->id & 0xff) - + ((sdev->lun & 0xff) << 8) - + ((sdev->channel & 0xff) << 16) - + ((sdev->host->host_no & 0xff) << 24), - .host_unique_id = sdev->host->unique_id - }; - if (copy_to_user(arg, &v, sizeof(struct scsi_idlun))) - return -EFAULT; - return 0; - } + case SCSI_IOCTL_GET_IDLUN: + return scsi_get_idlun(sdev, arg); case SCSI_IOCTL_GET_BUS_NUMBER: return put_user(sdev->host->host_no, (int __user *)arg); case SCSI_IOCTL_PROBE_HOST:
--
2.30.2