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Link: https://lore.kernel.org/r/de73fa02f38f67f54f22ef2842f9680c0b34434a.1583136624.git.mchehab+huawei@kernel.org Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
37 lines
1,018 B
ReStructuredText
37 lines
1,018 B
ReStructuredText
.. SPDX-License-Identifier: GPL-2.0
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========================
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tcm_qla2xxx Driver Notes
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========================
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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::
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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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