tcm_qla2xxx Driver Notes¶
tcm_qla2xxx jam_host attribute¶
There is now a new module endpoint attribute called jam_host attribute:
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