On 8/30/16, 2:49 PM, "Laurence Oberman" <loberman@xxxxxxxxxx> wrote:
>Hello Himanshu and Nicholas,
>
>Enhancements to the tcm_debug code.
>This is patch V2 (final) as V1 had issues.
>
>Added the possibility of blocking only specific SCSI data movement commands
>but allowing TUR'S to pass.
>This has been helpful for debugging many driver/array interoperabilty
>issues.
>
>Folded documentation and code into single patch now
>
>Tested by: Laurence Oberman <loberman@xxxxxxxxxx>
>Signed-off-by: Laurence Oberman <loberman@xxxxxxxxxx>
>
> Documentation/scsi/tcm_qla2xxx.txt | 16 ++++++++++++++++
> drivers/scsi/qla2xxx/tcm_qla2xxx.c | 7 +++++++
> drivers/scsi/qla2xxx/tcm_qla2xxx.h | 1 +
> 3 files changed, 24 insertions(+)
>
>diff --git a/Documentation/scsi/tcm_qla2xxx.txt b/Documentation/scsi/tcm_qla2xxx.txt
>index c3a670a..8d26d29 100644
>--- a/Documentation/scsi/tcm_qla2xxx.txt
>+++ b/Documentation/scsi/tcm_qla2xxx.txt
>@@ -20,3 +20,19 @@ echo 1 > /sys/kernel/config/target/qla2xxx/21:00:00:24:ff:27:8f:ae/tpgt_1/attrib
>
> 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
>+
>+New feature added with a new attribute called jam_data.
>+
>+Setting a boolean of 1 for jam_data will allow the allow the dropping of data-only SCSI
>+ commands but allow TUR commands to pass.
>+Note that for this to work jam_host needs to be set to 0
>+
>+This has proven very useful for testing Low Level driver response.
>+
>+Enable host 4 for only data commands to be jammed
>+echo 0 > /sys/kernel/config/target/qla2xxx/21:00:00:24:ff:27:8f:ae/tpgt_1/attrib/jam_host
>+echo 1 > /sys/kernel/config/target/qla2xxx/21:00:00:24:ff:27:8f:ae/tpgt_1/attrib/jam_data
>+
>+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
>+echo 0 > /sys/kernel/config/target/qla2xxx/21:00:00:24:ff:27:8f:ae/tpgt_1/attrib/jam_data
>
>diff --git a/drivers/scsi/qla2xxx/tcm_qla2xxx.c b/drivers/scsi/qla2xxx/tcm_qla2xxx.c
>index 6643f6f..1cb3f02 100644
>--- a/drivers/scsi/qla2xxx/tcm_qla2xxx.c
>+++ b/drivers/scsi/qla2xxx/tcm_qla2xxx.c
>@@ -473,6 +473,10 @@ static int tcm_qla2xxx_handle_cmd(scsi_qla_host_t *vha, struct qla_tgt_cmd *cmd,
> /* return, and dont run target_submit_cmd,discarding command */
> return 0;
> }
>+ if (unlikely(tpg->tpg_attrib.jam_data && (cdb[0]==0x08 || cdb[0]==0x0A || cdb[0]==0x28 || cdb[0]==0x2A))) {
>+ /* return, and dont run target_submit_cmd,discarding command if not TUR*/
>+ return 0;
>+ }
> #endif
>
> cmd->vha->tgt_counters.qla_core_sbt_cmd++;
>@@ -827,6 +831,7 @@ DEF_QLA_TPG_ATTRIB(prod_mode_write_protect);
> DEF_QLA_TPG_ATTRIB(demo_mode_login_only);
> #ifdef CONFIG_TCM_QLA2XXX_DEBUG
> DEF_QLA_TPG_ATTRIB(jam_host);
>+DEF_QLA_TPG_ATTRIB(jam_data);
> #endif
>
> static struct configfs_attribute *tcm_qla2xxx_tpg_attrib_attrs[] = {
>@@ -837,6 +842,7 @@ static struct configfs_attribute *tcm_qla2xxx_tpg_attrib_attrs[] = {
> &tcm_qla2xxx_tpg_attrib_attr_demo_mode_login_only,
> #ifdef CONFIG_TCM_QLA2XXX_DEBUG
> &tcm_qla2xxx_tpg_attrib_attr_jam_host,
>+ &tcm_qla2xxx_tpg_attrib_attr_jam_data,
> #endif
> NULL,
> };
>@@ -1011,6 +1017,7 @@ static struct se_portal_group *tcm_qla2xxx_make_tpg(
> tpg->tpg_attrib.cache_dynamic_acls = 1;
> tpg->tpg_attrib.demo_mode_login_only = 1;
> tpg->tpg_attrib.jam_host = 0;
>+ tpg->tpg_attrib.jam_data = 0;
>
> ret = core_tpg_register(wwn, &tpg->se_tpg, SCSI_PROTOCOL_FCP);
> if (ret < 0) {
>diff --git a/drivers/scsi/qla2xxx/tcm_qla2xxx.h b/drivers/scsi/qla2xxx/tcm_qla2xxx.h
>index 37e026a..789bdeb 100644
>--- a/drivers/scsi/qla2xxx/tcm_qla2xxx.h
>+++ b/drivers/scsi/qla2xxx/tcm_qla2xxx.h
>@@ -35,6 +35,7 @@ struct tcm_qla2xxx_tpg_attrib {
> int demo_mode_login_only;
> int fabric_prot_type;
> int jam_host;
>+ int jam_data;
> };
>
> struct tcm_qla2xxx_tpg {
>--
>2.5.5
Looks okay.
Acked-By: Himanshu Madhani <himanshu.madhani@xxxxxxxxxx>
>
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