PROBE::SCSI.IODISP(3stap) SCSI Tapset PROBE::SCSI.IODISP(3stap)

# [NAME](#NAME)

probe::scsi.iodispatching - SCSI mid-layer dispatched low-level SCSI command

# [SYNOPSIS](#SYNOPSIS)

```
probe scsi.iodispatching {}
```

# [VALUES](#VALUES)

*device\_state*

The current state of the device

*lun*

The lun number

*device\_state\_str*

The current state of the device, as a string

*channel*

The channel number

*dev\_id*

The scsi device id

*host\_no*

The host number

*data\_direction*

The data\_direction specifies whether this command is from/to the device 0 (DMA\_BIDIRECTIONAL), 1 (DMA\_TO\_DEVICE), 2 (DMA\_FROM\_DEVICE), 3 (DMA\_NONE)

*req\_addr*

The current struct request pointer, as a number

*request\_buffer*

The request buffer address

*request\_bufflen*

The request buffer length

*data\_direction\_str*

Data direction, as a string

# [SEE ALSO0](#SEE_ALSO0)

[*tapset::scsi*(3stap)](/man/enterprise-packages/systemtap/tapset::scsi.3stap)

September 2026 SystemTap Tapset Reference Ver

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Document: probe::scsi.iodispatching(3stap) from systemtap 5.6-r0 (Chainguard OS)
Source: https://sourceware.org/git/systemtap.git