| .. 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 |
