diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/scsi/scsi_device.h | 16 | ||||
| -rw-r--r-- | include/scsi/scsi_host.h | 6 |
2 files changed, 22 insertions, 0 deletions
diff --git a/include/scsi/scsi_device.h b/include/scsi/scsi_device.h index 4c106342c4ae..918631088711 100644 --- a/include/scsi/scsi_device.h +++ b/include/scsi/scsi_device.h @@ -589,6 +589,22 @@ static inline unsigned int sdev_id(struct scsi_device *sdev) #define scmd_id(scmd) sdev_id((scmd)->device) #define scmd_channel(scmd) sdev_channel((scmd)->device) +/** + * scsi_device_is_pseudo_dev() - Whether a device is a pseudo SCSI device. + * @sdev: SCSI device to examine + * + * A pseudo SCSI device can be used to allocate SCSI commands but does not show + * up in sysfs. Additionally, the logical unit information in *@sdev is made up. + * + * This function tests the LUN number instead of comparing @sdev with + * @sdev->host->pseudo_sdev because this function may be called before + * @sdev->host->pseudo_sdev has been initialized. + */ +static inline bool scsi_device_is_pseudo_dev(struct scsi_device *sdev) +{ + return sdev->lun == U64_MAX; +} + /* * checks for positions of the SCSI state machine */ diff --git a/include/scsi/scsi_host.h b/include/scsi/scsi_host.h index 7b8f144ccf7d..4f945a20d198 100644 --- a/include/scsi/scsi_host.h +++ b/include/scsi/scsi_host.h @@ -722,6 +722,12 @@ struct Scsi_Host { struct device shost_gendev, shost_dev; /* + * A SCSI device structure used for sending internal commands to the + * HBA. There is no corresponding logical unit inside the SCSI device. + */ + struct scsi_device *pseudo_sdev; + + /* * Points to the transport data (if any) which is allocated * separately */ |