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This patch introduces support for TCM_QLA2XXX_DEBUG and associated tcm_qla2xxx_tpg->tpg_attrib.jam_host checking used to test dropped packets to FC host environments. Tested by: Laurence Oberman <loberman@redhat.com> Signed-off-by: Laurence Oberman <loberman@redhat.com> Acked-by: Himanshu Madhani <himanshu.madhani@qlogic.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
23 lines
889 B
Plaintext
23 lines
889 B
Plaintext
tcm_qla2xxx jam_host attribute
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------------------------------
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There is now a new module endpoint atribute called jam_host
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attribute: jam_host: boolean=0/1
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This attribute and accompanying code is only included if the
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Kconfig parameter TCM_QLA2XXX_DEBUG is set to Y
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By default this jammer code and functionality is disabled
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Use this attribute to control the discarding of SCSI commands to a
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selected host.
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This may be useful for testing error handling and simulating slow drain
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and other fabric issues.
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Setting a boolean of 1 for the jam_host attribute for a particular host
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will discard the commands for that host.
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Reset back to 0 to stop the jamming.
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Enable host 4 to be jammed
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echo 1 > /sys/kernel/config/target/qla2xxx/21:00:00:24:ff:27:8f:ae/tpgt_1/attrib/jam_host
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Disable jamming on host 4
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echo 0 > /sys/kernel/config/target/qla2xxx/21:00:00:24:ff:27:8f:ae/tpgt_1/attrib/jam_host
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