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| author | Laurence Oberman <loberman@redhat.com> | 2016-05-10 10:23:17 +0200 |
|---|---|---|
| committer | Nicholas Bellinger <nab@linux-iscsi.org> | 2016-05-10 10:27:17 +0200 |
| commit | 54a5e73f4d6e31d5628e08b4d575c71d71670e09 (patch) | |
| tree | d328638aeb98baefb01a281f9e38f2371a3fdf61 /Documentation/scsi/tcm_qla2xxx.txt | |
| parent | iscsi-target: graceful disconnect on invalid mapping to iovec (diff) | |
| download | linux-54a5e73f4d6e31d5628e08b4d575c71d71670e09.tar.xz linux-54a5e73f4d6e31d5628e08b4d575c71d71670e09.zip | |
tcm_qla2xxx Add SCSI command jammer/discard capability
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>
Diffstat (limited to 'Documentation/scsi/tcm_qla2xxx.txt')
| -rw-r--r-- | Documentation/scsi/tcm_qla2xxx.txt | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/Documentation/scsi/tcm_qla2xxx.txt b/Documentation/scsi/tcm_qla2xxx.txt new file mode 100644 index 000000000000..c3a670a25e2b --- /dev/null +++ b/Documentation/scsi/tcm_qla2xxx.txt @@ -0,0 +1,22 @@ +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 |