| pass.4 (84877) | pass.4 (117011) |
|---|---|
| 1.\" 2.\" Copyright (c) 1998, 1999 Kenneth D. Merry. 3.\" All rights reserved. 4.\" 5.\" Redistribution and use in source and binary forms, with or without 6.\" modification, are permitted provided that the following conditions 7.\" are met: 8.\" 1. Redistributions of source code must retain the above copyright --- 11 unchanged lines hidden (view full) --- 20.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26.\" SUCH DAMAGE. 27.\" | 1.\" 2.\" Copyright (c) 1998, 1999 Kenneth D. Merry. 3.\" All rights reserved. 4.\" 5.\" Redistribution and use in source and binary forms, with or without 6.\" modification, are permitted provided that the following conditions 7.\" are met: 8.\" 1. Redistributions of source code must retain the above copyright --- 11 unchanged lines hidden (view full) --- 20.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26.\" SUCH DAMAGE. 27.\" |
| 28.\" $FreeBSD: head/share/man/man4/pass.4 84877 2001-10-13 09:08:37Z yokota $ | 28.\" $FreeBSD: head/share/man/man4/pass.4 117011 2003-06-28 23:53:39Z ru $ |
| 29.\" 30.Dd October 10, 1998 31.Dt PASS 4 32.Os 33.Sh NAME 34.Nm pass 35.Nd CAM application passthrough driver 36.Sh SYNOPSIS 37.Cd device pass 38.Sh DESCRIPTION 39The 40.Nm 41driver provides a way for userland applications to issue CAM CCBs to the 42kernel. 43.Pp 44Since the 45.Nm 46driver allows direct access to the CAM subsystem, system administrators | 29.\" 30.Dd October 10, 1998 31.Dt PASS 4 32.Os 33.Sh NAME 34.Nm pass 35.Nd CAM application passthrough driver 36.Sh SYNOPSIS 37.Cd device pass 38.Sh DESCRIPTION 39The 40.Nm 41driver provides a way for userland applications to issue CAM CCBs to the 42kernel. 43.Pp 44Since the 45.Nm 46driver allows direct access to the CAM subsystem, system administrators |
| 47should exercise caution when granting access to this driver. If used | 47should exercise caution when granting access to this driver. 48If used |
| 48improperly, this driver can allow userland applications to crash a machine 49or cause data loss. 50.Pp 51The 52.Nm 53driver attaches to every 54.Tn SCSI 55device found in the system. --- 8 unchanged lines hidden (view full) --- 64.Nm 65devices are automatically allocated as 66.Tn SCSI 67devices are found. 68.Sh IOCTLS 69.Bl -tag -width 012345678901234 70.It CAMIOCOMMAND 71This ioctl takes most kinds of CAM CCBs and passes them through to the CAM | 49improperly, this driver can allow userland applications to crash a machine 50or cause data loss. 51.Pp 52The 53.Nm 54driver attaches to every 55.Tn SCSI 56device found in the system. --- 8 unchanged lines hidden (view full) --- 65.Nm 66devices are automatically allocated as 67.Tn SCSI 68devices are found. 69.Sh IOCTLS 70.Bl -tag -width 012345678901234 71.It CAMIOCOMMAND 72This ioctl takes most kinds of CAM CCBs and passes them through to the CAM |
| 72transport layer for action. Note that some CCB types are not allowed | 73transport layer for action. 74Note that some CCB types are not allowed |
| 73through the passthrough device, and must be sent through the 74.Xr xpt 4 | 75through the passthrough device, and must be sent through the 76.Xr xpt 4 |
| 75device instead. Some examples of xpt-only CCBs are XPT_SCAN_BUS, | 77device instead. 78Some examples of xpt-only CCBs are XPT_SCAN_BUS, |
| 76XPT_DEV_MATCH, XPT_RESET_BUS, XPT_SCAN_LUN, XPT_ENG_INQ, and XPT_ENG_EXEC. 77These CCB types have various attributes that make it illogical or 78impossible to service them through the passthrough interface. 79.It CAMGETPASSTHRU 80This ioctl takes an XPT_GDEVLIST CCB, and returns the passthrough device | 79XPT_DEV_MATCH, XPT_RESET_BUS, XPT_SCAN_LUN, XPT_ENG_INQ, and XPT_ENG_EXEC. 80These CCB types have various attributes that make it illogical or 81impossible to service them through the passthrough interface. 82.It CAMGETPASSTHRU 83This ioctl takes an XPT_GDEVLIST CCB, and returns the passthrough device |
| 81corresponding to the device in question. Although this ioctl is available 82through the | 84corresponding to the device in question. 85Although this ioctl is available through the |
| 83.Nm 84driver, it is of limited use, since the caller must already know that 85the device in question is a passthrough device if they're issuing this | 86.Nm 87driver, it is of limited use, since the caller must already know that 88the device in question is a passthrough device if they're issuing this |
| 86ioctl. It is probably more useful to issue this ioctl through the | 89ioctl. 90It is probably more useful to issue this ioctl through the |
| 87.Xr xpt 4 88device. 89.El 90.Sh FILES 91.Bl -tag -width /dev/passn -compact 92.It Pa /dev/pass Ns Ar n 93Character device nodes for the 94.Nm | 91.Xr xpt 4 92device. 93.El 94.Sh FILES 95.Bl -tag -width /dev/passn -compact 96.It Pa /dev/pass Ns Ar n 97Character device nodes for the 98.Nm |
| 95driver. There should be one of these for each device accessed through the | 99driver. 100There should be one of these for each device accessed through the |
| 96CAM subsystem. 97.El 98.Sh DIAGNOSTICS 99None. 100.Sh SEE ALSO 101.Xr cam 3 , 102.Xr cam_cdbparse 3 , 103.Xr xpt 4 , 104.Xr camcontrol 8 105.Sh HISTORY 106The CAM passthrough driver first appeared in 107.Fx 3.0 . 108.Sh AUTHORS 109.An Kenneth Merry Aq ken@FreeBSD.org 110.Sh BUGS 111It might be nice to have a way to asynchronously send CCBs through the | 101CAM subsystem. 102.El 103.Sh DIAGNOSTICS 104None. 105.Sh SEE ALSO 106.Xr cam 3 , 107.Xr cam_cdbparse 3 , 108.Xr xpt 4 , 109.Xr camcontrol 8 110.Sh HISTORY 111The CAM passthrough driver first appeared in 112.Fx 3.0 . 113.Sh AUTHORS 114.An Kenneth Merry Aq ken@FreeBSD.org 115.Sh BUGS 116It might be nice to have a way to asynchronously send CCBs through the |
| 112passthrough driver. This would probably require some sort of read/write | 117passthrough driver. 118This would probably require some sort of read/write |
| 113interface or an asynchronous ioctl interface. | 119interface or an asynchronous ioctl interface. |