From: Mike Christie <michaelc@xxxxxxxxxxx>
Set target can queue limit to the number of preallocated
session tasks we have.
This along with the cxgb3i can_queue patch will fix a throughput
problem where it could only queue one LU worth of data at a time.
Signed-off-by: Mike Christie <michaelc@xxxxxxxxxxx>
---
drivers/infiniband/ulp/iser/iscsi_iser.c | 1 +
drivers/scsi/cxgb3i/cxgb3i_iscsi.c | 1 +
drivers/scsi/iscsi_tcp.c | 1 +
drivers/scsi/libiscsi.c | 10 ++++++++++
include/scsi/libiscsi.h | 2 ++
5 files changed, 15 insertions(+), 0 deletions(-)
diff --git a/drivers/infiniband/ulp/iser/iscsi_iser.c b/drivers/infiniband/ulp/iser/iscsi_iser.c
index 13d7674..75223f5 100644
--- a/drivers/infiniband/ulp/iser/iscsi_iser.c
+++ b/drivers/infiniband/ulp/iser/iscsi_iser.c
@@ -599,6 +599,7 @@ static struct scsi_host_template iscsi_iser_sht = {
.eh_abort_handler = iscsi_eh_abort,
.eh_device_reset_handler= iscsi_eh_device_reset,
.eh_target_reset_handler= iscsi_eh_target_reset,
+ .target_alloc = iscsi_target_alloc,
.use_clustering = DISABLE_CLUSTERING,
.proc_name = "iscsi_iser",
.this_id = -1,
diff --git a/drivers/scsi/cxgb3i/cxgb3i_iscsi.c b/drivers/scsi/cxgb3i/cxgb3i_iscsi.c
index fff8e43..b3ca3a0 100644
--- a/drivers/scsi/cxgb3i/cxgb3i_iscsi.c
+++ b/drivers/scsi/cxgb3i/cxgb3i_iscsi.c
@@ -883,6 +883,7 @@ static struct scsi_host_template cxgb3i_host_template = {
.eh_abort_handler = iscsi_eh_abort,
.eh_device_reset_handler = iscsi_eh_device_reset,
.eh_target_reset_handler = iscsi_eh_target_reset,
+ .target_alloc = iscsi_target_alloc,
.use_clustering = DISABLE_CLUSTERING,
.this_id = -1,
};
diff --git a/drivers/scsi/iscsi_tcp.c b/drivers/scsi/iscsi_tcp.c
index f97fc7e..b7c092d 100644
--- a/drivers/scsi/iscsi_tcp.c
+++ b/drivers/scsi/iscsi_tcp.c
@@ -851,6 +851,7 @@ static struct scsi_host_template iscsi_sw_tcp_sht = {
.use_clustering = DISABLE_CLUSTERING,
.slave_alloc = iscsi_sw_tcp_slave_alloc,
.slave_configure = iscsi_sw_tcp_slave_configure,
+ .target_alloc = iscsi_target_alloc,
.proc_name = "iscsi_tcp",
.this_id = -1,
};
diff --git a/drivers/scsi/libiscsi.c b/drivers/scsi/libiscsi.c
index 6896283..e72b4ad 100644
--- a/drivers/scsi/libiscsi.c
+++ b/drivers/scsi/libiscsi.c
@@ -1463,6 +1463,16 @@ int iscsi_change_queue_depth(struct scsi_device *sdev, int depth)
}
EXPORT_SYMBOL_GPL(iscsi_change_queue_depth);
+int iscsi_target_alloc(struct scsi_target *starget)
+{
+ struct iscsi_cls_session *cls_session = starget_to_session(starget);
+ struct iscsi_session *session = cls_session->dd_data;
+
+ starget->can_queue = session->scsi_cmds_max;
+ return 0;
+}
+EXPORT_SYMBOL_GPL(iscsi_target_alloc);
+
void iscsi_session_recovery_timedout(struct iscsi_cls_session *cls_session)
{
struct iscsi_session *session = cls_session->dd_data;
diff --git a/include/scsi/libiscsi.h b/include/scsi/libiscsi.h
index 7ffaed2..0289f57 100644
--- a/include/scsi/libiscsi.h
+++ b/include/scsi/libiscsi.h
@@ -36,6 +36,7 @@ struct scsi_transport_template;
struct scsi_host_template;
struct scsi_device;
struct Scsi_Host;
+struct scsi_target;
struct scsi_cmnd;
struct socket;
struct iscsi_transport;
@@ -350,6 +351,7 @@ extern struct Scsi_Host *iscsi_host_alloc(struct scsi_host_template *sht,
bool xmit_can_sleep);
extern void iscsi_host_remove(struct Scsi_Host *shost);
extern void iscsi_host_free(struct Scsi_Host *shost);
+extern int iscsi_target_alloc(struct scsi_target *starget);
/*
* session management
--
1.6.0.6
--
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