1.\" 2.\" Copyright (c) 2024 Netflix, Inc. 3.\" 4.\" SPDX-License-Expression: BSD-2-Clause 5.\" 6.Dd May 6, 2024 7.Dt SG 4 8.Os 9.Sh NAME 10.Nm sg 11.Nd Linux ioctl-compatible SCSI passthru device 12.Sh SYNOPSIS 13.Cd device sg 14.Cd device scbus 15.Sh DESCRIPTION 16The 17.Nm 18driver provides a Linux compatible scsi passthru device. 19This driver attaches to all 20.Xr cam 4 21peripheral devices. 22It is similar to the 23.Xr pass 4 24device, but uses the Linux interfaces, rather than the FreeBSD CAM interfaces. 25.Sh IOCTL 26The following subset of the Linux sg ioctl interfaces are implemented: 27.Bl -tag -width 12 28.It Va SG_SET_TIMEOUT 29.Fa u_int to 30Set the timeout in milliseconds. 31.It Va SG_GET_TIMEOUT 32Get the timeout in milliseconds 33.It Va SG_GET_RESERVED_SIZE 34.Fa u_int 35Returns the size of the I/O one can do this device. 36.It Va SG_GET_SCSI_ID 37.Fa struct sg_scsi_id 38Returns the bus number, channel, scsi bus ID number, lun and other information 39about the SCSI device. 40.It Va SG_GET_SG_TABLESIZE 41.Fa u_int 42Returns the table size, though hard wired to 0. 43.It Va SG_GET_VERSION_NUM 44.Fa u_int 45Return the version number that is implemented. 46.It Va SG_IO 47.Fa struct sg_io_hdr 48.El 49All other ioctl interfaces return 50.Va ENODEV . 51.Sh FILES 52.Bl -tag -width ".Pa /dev/sg*" -compact 53.It Pa /dev/sg* 54Passthru devices. 55.El 56.Sh SEE ALSO 57.Xr cam 4 , 58.Xr pass 4 59.Sh HISTORY 60The 61.Nm 62driver first appeared in 63.Fx 7.0 . 64