Target core is modified to call an optional backend
callback function if a TMR is received or commands
are aborted implicitly after a PR command was received.
The backend function takes as parameters the se_dev, the
type of the TMR, and the list of aborted commands.
If no commands were aborted, an empty list is supplied.
Signed-off-by: Bodo Stroesser <bstroesser@xxxxxxxxxxxxxx>
---
drivers/target/target_core_tmr.c | 16 +++++++++++++++-
drivers/target/target_core_transport.c | 1 +
include/target/target_core_backend.h | 2 ++
include/target/target_core_base.h | 1 +
4 files changed, 19 insertions(+), 1 deletion(-)
diff --git a/drivers/target/target_core_tmr.c b/drivers/target/target_core_tmr.c
index 73c4155f3c1e..e4513ef09159 100644
--- a/drivers/target/target_core_tmr.c
+++ b/drivers/target/target_core_tmr.c
@@ -116,6 +116,7 @@ void core_tmr_abort_task(
struct se_tmr_req *tmr,
struct se_session *se_sess)
{
+ LIST_HEAD(aborted_list);
struct se_cmd *se_cmd, *next;
unsigned long flags;
bool rc;
@@ -144,7 +145,7 @@ void core_tmr_abort_task(
if (!rc)
continue;
- list_del_init(&se_cmd->state_list);
+ list_move_tail(&se_cmd->state_list, &aborted_list);
se_cmd->state_active = false;
spin_unlock_irqrestore(&dev->execute_task_lock, flags);
@@ -157,6 +158,11 @@ void core_tmr_abort_task(
WARN_ON_ONCE(transport_lookup_tmr_lun(tmr->task_cmd) <
0);
+ if (dev->transport->tmr_notify)
+ dev->transport->tmr_notify(dev, TMR_ABORT_TASK,
+ &aborted_list);
+
+ list_del_init(&se_cmd->state_list);
target_put_cmd_and_wait(se_cmd);
printk("ABORT_TASK: Sending TMR_FUNCTION_COMPLETE for"
@@ -167,6 +173,9 @@ void core_tmr_abort_task(
}
spin_unlock_irqrestore(&dev->execute_task_lock, flags);
+ if (dev->transport->tmr_notify)
+ dev->transport->tmr_notify(dev, TMR_ABORT_TASK, &aborted_list);
+
printk("ABORT_TASK: Sending TMR_TASK_DOES_NOT_EXIST for ref_tag: %lld\n",
tmr->ref_task_tag);
tmr->response = TMR_TASK_DOES_NOT_EXIST;
@@ -318,6 +327,11 @@ static void core_tmr_drain_state_list(
}
spin_unlock_irqrestore(&dev->execute_task_lock, flags);
+ if (dev->transport->tmr_notify)
+ dev->transport->tmr_notify(dev, preempt_and_abort_list ?
+ TMR_LUN_RESET_PRO : TMR_LUN_RESET,
+ &drain_task_list);
+
while (!list_empty(&drain_task_list)) {
cmd = list_entry(drain_task_list.next, struct se_cmd, state_list);
list_del_init(&cmd->state_list);
diff --git a/drivers/target/target_core_transport.c b/drivers/target/target_core_transport.c
index e6e1fa68de54..9fb0be0aa620 100644
--- a/drivers/target/target_core_transport.c
+++ b/drivers/target/target_core_transport.c
@@ -2946,6 +2946,7 @@ static const char *target_tmf_name(enum tcm_tmreq_table tmf)
case TMR_LUN_RESET: return "LUN_RESET";
case TMR_TARGET_WARM_RESET: return "TARGET_WARM_RESET";
case TMR_TARGET_COLD_RESET: return "TARGET_COLD_RESET";
+ case TMR_LUN_RESET_PRO: return "LUN_RESET_PRO";
case TMR_UNKNOWN: break;
}
return "(?)";
diff --git a/include/target/target_core_backend.h b/include/target/target_core_backend.h
index f51452e3b984..6336780d83a7 100644
--- a/include/target/target_core_backend.h
+++ b/include/target/target_core_backend.h
@@ -40,6 +40,8 @@ struct target_backend_ops {
ssize_t (*show_configfs_dev_params)(struct se_device *, char *);
sense_reason_t (*parse_cdb)(struct se_cmd *cmd);
+ void (*tmr_notify)(struct se_device *se_dev, enum tcm_tmreq_table,
+ struct list_head *aborted_cmds);
u32 (*get_device_type)(struct se_device *);
sector_t (*get_blocks)(struct se_device *);
sector_t (*get_alignment_offset_lbas)(struct se_device *);
diff --git a/include/target/target_core_base.h b/include/target/target_core_base.h
index 18c3f277b770..549947d407cf 100644
--- a/include/target/target_core_base.h
+++ b/include/target/target_core_base.h
@@ -207,6 +207,7 @@ enum tcm_tmreq_table {
TMR_LUN_RESET = 5,
TMR_TARGET_WARM_RESET = 6,
TMR_TARGET_COLD_RESET = 7,
+ TMR_LUN_RESET_PRO = 0x80,
TMR_UNKNOWN = 0xff,
};
--
2.12.3
