This adds PGR support for just TCMU, since tcmu doesn't
have the necessary IT_NEXUS info to process PGR in userspace,
so have those commands be processed in kernel.
Signed-off-by: Bryant G. Ly <bryan...@linux.vnet.ibm.com>
---
drivers/target/target_core_configfs.c | 10 +++++-----
drivers/target/target_core_device.c | 27 +++++++++++++++++++++++++++
drivers/target/target_core_pr.c | 2 +-
drivers/target/target_core_pscsi.c | 3 ++-
include/target/target_core_backend.h | 1 +
5 files changed, 36 insertions(+), 7 deletions(-)
diff --git a/drivers/target/target_core_configfs.c
b/drivers/target/target_core_configfs.c
index 38b5025..edfb098 100644
--- a/drivers/target/target_core_configfs.c
+++ b/drivers/target/target_core_configfs.c
@@ -1366,7 +1366,7 @@ static ssize_t target_pr_res_holder_show(struct
config_item *item, char *page)
struct se_device *dev = pr_to_dev(item);
int ret;
- if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)
+ if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)
return sprintf(page, "Passthrough\n");
spin_lock(&dev->dev_reservation_lock);
@@ -1506,7 +1506,7 @@ static ssize_t target_pr_res_type_show(struct config_item
*item, char *page)
{
struct se_device *dev = pr_to_dev(item);
- if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)
+ if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)
return sprintf(page, "SPC_PASSTHROUGH\n");
else if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
return sprintf(page, "SPC2_RESERVATIONS\n");
@@ -1519,7 +1519,7 @@ static ssize_t target_pr_res_aptpl_active_show(struct
config_item *item,
{
struct se_device *dev = pr_to_dev(item);
- if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)
+ if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)
return 0;
return sprintf(page, "APTPL Bit Status: %s\n",
@@ -1531,7 +1531,7 @@ static ssize_t target_pr_res_aptpl_metadata_show(struct
config_item *item,
{
struct se_device *dev = pr_to_dev(item);
- if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)
+ if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)
return 0;
return sprintf(page, "Ready to process PR APTPL metadata..\n");
@@ -1577,7 +1577,7 @@ static ssize_t target_pr_res_aptpl_metadata_store(struct
config_item *item,
u16 tpgt = 0;
u8 type = 0;
- if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)
+ if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)
return count;
if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
return count;
diff --git a/drivers/target/target_core_device.c
b/drivers/target/target_core_device.c
index c754ae3..83c0d77 100644
--- a/drivers/target/target_core_device.c
+++ b/drivers/target/target_core_device.c
@@ -1045,6 +1045,7 @@ passthrough_parse_cdb(struct se_cmd *cmd,
sense_reason_t (*exec_cmd)(struct se_cmd *cmd))
{
unsigned char *cdb = cmd->t_task_cdb;
+ struct se_device *dev = cmd->se_dev;
/*
* Clear a lun set in the cdb if the initiator talking to use spoke
@@ -1076,6 +1077,32 @@ passthrough_parse_cdb(struct se_cmd *cmd,
return TCM_NO_SENSE;
}
+ /*
+ * For PERSISTENT RESERVE IN/OUT, RELEASE, and RESERVE we need to
+ * emulate the response, since tcmu does not have the information
+ * required to process these commands.
+ */
+ if (!(dev->transport->transport_flags &
+ TRANSPORT_FLAG_PASSTHROUGH_PGR)) {
+ if (cdb[0] == PERSISTENT_RESERVE_IN) {
+ cmd->execute_cmd = target_scsi3_emulate_pr_in;
+ return TCM_NO_SENSE;
+ }
+ if (cdb[0] == PERSISTENT_RESERVE_OUT) {
+ cmd->execute_cmd = target_scsi3_emulate_pr_out;
+ return TCM_NO_SENSE;
+ }
+
+ if (cdb[0] == RELEASE || cdb[0] == RELEASE_10) {
+ cmd->execute_cmd = target_scsi2_reservation_release;
+ return TCM_NO_SENSE;
+ }
+ if (cdb[0] == RESERVE || cdb[0] == RESERVE_10) {
+ cmd->execute_cmd = target_scsi2_reservation_reserve;
+ return TCM_NO_SENSE;
+ }
+ }
+
/* Set DATA_CDB flag for ops that should have it */
switch (cdb[0]) {
case READ_6:
diff --git a/drivers/target/target_core_pr.c b/drivers/target/target_core_pr.c
index e180511..129ca57 100644
--- a/drivers/target/target_core_pr.c
+++ b/drivers/target/target_core_pr.c
@@ -4147,7 +4147,7 @@ target_check_reservation(struct se_cmd *cmd)
return 0;
if (dev->se_hba->hba_flags & HBA_FLAGS_INTERNAL_USE)
return 0;
- if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)
+ if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)
return 0;
spin_lock(&dev->dev_reservation_lock);
diff --git a/drivers/target/target_core_pscsi.c
b/drivers/target/target_core_pscsi.c
index 94cda79..8943a62 100644
--- a/drivers/target/target_core_pscsi.c
+++ b/drivers/target/target_core_pscsi.c
@@ -1081,7 +1081,8 @@ static const struct target_backend_ops pscsi_ops = {
.name = "pscsi",
.owner = THIS_MODULE,
.transport_flags = TRANSPORT_FLAG_PASSTHROUGH |
- TRANSPORT_FLAG_PASSTHROUGH_ALUA,
+ TRANSPORT_FLAG_PASSTHROUGH_ALUA |
+ TRANSPORT_FLAG_PASSTHROUGH_PGR,
.attach_hba = pscsi_attach_hba,
.detach_hba = pscsi_detach_hba,
.pmode_enable_hba = pscsi_pmode_enable_hba,
diff --git a/include/target/target_core_backend.h
b/include/target/target_core_backend.h
index 1b0f447..e475531 100644
--- a/include/target/target_core_backend.h
+++ b/include/target/target_core_backend.h
@@ -10,6 +10,7 @@
* backend module.
*/
#define TRANSPORT_FLAG_PASSTHROUGH_ALUA 0x2
+#define TRANSPORT_FLAG_PASSTHROUGH_PGR 0x4
struct request_queue;
struct scatterlist;
--
2.5.4 (Apple Git-61)
