1 .. SPDX-License-Identifier: GPL-2.0 2 3 ======================== 4 tcm_qla2xxx Driver Notes 5 ======================== 6 7 tcm_qla2xxx jam_host attribute 8 ------------------------------ 9 There is now a new module endpoint attribute called jam_host 10 attribute:: 11 12 jam_host: boolean=0/1 13 14 This attribute and accompanying code is only included if the 15 Kconfig parameter TCM_QLA2XXX_DEBUG is set to Y 16 17 By default this jammer code and functionality is disabled 18 19 Use this attribute to control the discarding of SCSI commands to a 20 selected host. 21 22 This may be useful for testing error handling and simulating slow drain 23 and other fabric issues. 24 25 Setting a boolean of 1 for the jam_host attribute for a particular host 26 will discard the commands for that host. 27 28 Reset back to 0 to stop the jamming. 29 30 Enable host 4 to be jammed:: 31 32 echo 1 > /sys/kernel/config/target/qla2xxx/21:00:00:24:ff:27:8f:ae/tpgt_1/attrib/jam_host 33 34 Disable jamming on host 4:: 35 36 echo 0 > /sys/kernel/config/target/qla2xxx/21:00:00:24:ff:27:8f:ae/tpgt_1/attrib/jam_host
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