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| author | Mauro Carvalho Chehab <mchehab+huawei@kernel.org> | 2020-03-02 11:16:12 +0300 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2020-03-12 06:08:03 +0300 |
| commit | e92c45d27236642b1e0deccc567f305f0fb3d2cc (patch) | |
| tree | c9da33b99c66f155aae044b0d4727a230e4ad8af /Documentation/scsi/tcm_qla2xxx.rst | |
| parent | f02e84d29e1d0ca512ae48e6599641038380ea16 (diff) | |
scsi: docs: convert tcm_qla2xxx.txt to ReST
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>
Diffstat (limited to 'Documentation/scsi/tcm_qla2xxx.rst')
| -rw-r--r-- | Documentation/scsi/tcm_qla2xxx.rst | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/Documentation/scsi/tcm_qla2xxx.rst b/Documentation/scsi/tcm_qla2xxx.rst new file mode 100644 index 000000000000..91bc1fcd369e --- /dev/null +++ b/Documentation/scsi/tcm_qla2xxx.rst @@ -0,0 +1,36 @@ +.. SPDX-License-Identifier: GPL-2.0 + +======================== +tcm_qla2xxx Driver Notes +======================== + +tcm_qla2xxx jam_host attribute +------------------------------ +There is now a new module endpoint atribute 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 |