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- .. SPDX-License-Identifier: GPL-2.0
- ========================
- tcm_qla2xxx Driver Notes
- ========================
- tcm_qla2xxx jam_host attribute
- ------------------------------
- There is now a new module endpoint attribute called jam_host
- attribute::
- jam_host: boolean=0/1
- This attribute and accompanying code is only included if the
- Kconfig parameter TCM_QLA2XXX_DEBUG is set to Y
- By default this jammer code and functionality is disabled
- Use this attribute to control the discarding of SCSI commands to a
- selected host.
- This may be useful for testing error handling and simulating slow drain
- and other fabric issues.
- Setting a boolean of 1 for the jam_host attribute for a particular host
- will discard the commands for that host.
- Reset back to 0 to stop the jamming.
- Enable host 4 to be jammed::
- echo 1 > /sys/kernel/config/target/qla2xxx/21:00:00:24:ff:27:8f:ae/tpgt_1/attrib/jam_host
- Disable jamming on host 4::
- echo 0 > /sys/kernel/config/target/qla2xxx/21:00:00:24:ff:27:8f:ae/tpgt_1/attrib/jam_host
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